EP4065376B1 - Printing machines and method for cleaning at least one nozzle bar of at least one printing assembly - Google Patents

Description

The invention relates to a printing machine according to the preamble of claim 1 and a method for cleaning at least one nozzle bar of at least one printing unit according to the preamble of claim 12.

Various methods are available for printing a printing material using a printing press, for example relief printing, gravure printing or non-impact printing methods. Non-impact printing methods, for example thermographic methods or in particular the inkjet method, do not have a fixed, physically unchangeable printing form and can, for example, produce different printed images on a printing material in each printing process. A non-impact printing machine usually has at least one image-generating device, in particular at least one printing unit with preferably at least one print head, for example preferably an inkjet print head. In the inkjet printing process, individual drops of a printing fluid are ejected from at least one volume of the print head as required and transferred to a printing material, resulting in a printed image on the printing material. By individually controlling a large number of volumes of the print head, different print images are generated, for example, which are, for example, individualized and/or personalized and/or can be produced cost-effectively, for example, in particular in small editions.

Regular cleaning of the components of the printing press, in particular the print heads of the nozzle bars and/or the spaces between them, is essential, particularly in the field of packaging printing.

through the DE 10 2016 214 356 A1 discloses a printing machine comprising a cleaning device for cleaning at least one print head of a nozzle bar.

The DE 11 2014 003 630 T5 discloses a cleaning device with a spray nozzle for spraying a cleaning solution onto a gap between two head modules of an ink jet head and two removal elements designed as wiping cloths for removing the cleaning solution.

The US2013/0106940A1 discloses an inkjet printing machine with an inkjet print head. The printing machine has at least one wiping device with a wiper for cleaning an exit surface and with a wiper for cleaning a liquid collection point. Furthermore, an annular element is disclosed which, when arranged in a capping position, seals off a liquid outlet area from its surroundings.

The U.S. 2015/0158304 A1 teaches a cleaning device for cleaning an inkjet printer with multiple printheads. In particular, poorly soluble UV-based ink is cleaned from the exit surface of the print head by means of a wiping device. A cover seals the nozzles of the exit surface from their surroundings.

The WO 2019/059099 A1 discloses a printing device with inkjet printheads, the printheads being moved horizontally from a printing position to a maintenance position. A cleaning device has a wiping unit with a wiping cloth, wherein the nozzle surface is cleaned with a dry cleaning mode and a wet cleaning mode under pressure contact. In addition, sealing elements are provided for sealing the nozzle surface.

The U.S. 2010/0214355 A1 discloses a maintenance device for cleaning a

print head of a printing press. A non-contact cleaning of the print head takes place by means of a device for spraying cleaning liquid. Contact cleaning is done by means of a device with a wipe. The nozzle surface is covered by a cap after cleaning has been completed. The print head is moved from its printing position to a maintenance position for cleaning. The device with wipe is moved from a non-contact position to a contact position to perform contact cleaning.

The US 2012/0038707 A1 teaches a printing device with inkjet printheads. A print head is supported by a frame, the frame having a printing position and a maintenance position. The maintenance position is shifted laterally along the axis of an impression cylinder to the printing position. Cleaning with indirect contact with the nozzle surface is carried out by means of a device for ejecting a cleaning liquid. Cleaning with direct contact to the nozzle face is done by means of a wipe and blade device. The nozzle surface cleaning means are arranged between the printing position and the maintenance position, the nozzle surface being cleaned during movement from the maintenance position to the printing position or vice versa.

The DE 696 02 301 T2 discloses an inkjet printing system having multiple printheads in a carriage member. The carriage member moves along a print path through a print zone. A first service station for performing a first wiping action on a first printhead and a second service station for performing a second wiping action on a second printhead are positioned in the printhead path. The first wiping action uses a movable wiper blade while the second wiping action uses a fixed blade. The first and second service stations are located adjacent to each other on a first side of the print zone.

The US 2014/0292911 A1 discloses an inkjet printing device with a maintenance unit. The maintenance device has a unit for applying cleaning liquid to the nozzle surface of a print head and an absorption unit with a wiping element and at least one covering unit. The nozzle surface and the maintenance device are arranged opposite one another relative to one another by a movement device.

The DE 10 2016 125 321 A1 teaches an apparatus for cleaning printheads. The device has at least one spray nozzle for generating a cleaning jet and at least one wiper lip. The spray nozzle and the wiper lip are arranged on a common carriage or on separate carriages, with the carriage or carriages being or are movably arranged on a linear guide.

The EP 1 218 193 A1 teaches a service station for cleaning a printhead. If there are multiple printheads, multiple maintenance stations are provided in a row, one maintenance station per printhead. The assembly of the maintenance station has a wiper and at least one spray system. The maintenance station can be arranged in the ready position, wiping position and sealing position. For cleaning, the print head is moved horizontally from its printing position to a position directly above the maintenance station. The EP 1 218 193 therefore discloses a printing machine with a cleaning device according to the preamble of claims 1 and 12.

The US 2019/0283431 A1 discloses a cleaning device for cleaning a nozzle bar. A first cleaning element and a second cleaning element wipe the nozzle face of the print heads. Before cleaning, the nozzle bar is raised and then lowered onto the cleaning device. In the lowered position, contact cleaning is carried out by means of the first or the second cleaning element.

The invention has for its object to provide a printing machine and a method for Cleaning at least one nozzle bar to create at least one printing unit.

The object is achieved according to the invention by the features of claim 1 and claim 12.

The dependent claims show advantageous developments and/or versions of the solutions found.

The advantages that can be achieved with the invention are, in particular, that a printing press is created. The printing machine comprises at least one printing unit with at least four nozzle bars, each with at least one print head. The at least one printing unit includes at least one cleaning device. The at least one printing unit includes the at least one cleaning device and at least one cleaning device. The at least one cleaning device comprises at least one cleaning element with at least one fluid supply opening. The at least one cleaning device comprises at least one removal unit with at least one contact element. The at least one contact element is designed as a wipe. The at least one removal unit has at least one storage position and at least one deployment position. The at least one removal unit is arranged in the at least one use position within an area between at least one nozzle bar of the at least four nozzle bars and a transport path of a printing material. The at least one cleaning element has at least one storage position and at least one use position. The at least one cleaning element is arranged in the at least one use position within the area between the at least one nozzle bar and the transport path of the printing material. Optionally, the at least one cleaning device or the at least one cleaning device is arranged in the area between the at least one nozzle bar and the transport path of printing material. At least one nozzle bar of the at least four nozzle bars has at least one printing position and at least one maintenance position. The at least one nozzle bar is optionally arranged in the printing position or in the at least one maintenance position. The at least one maintenance position is arranged in the vertical direction, preferably in a z-direction, above the printing position. The at least one cleaning device is designed to clean the at least one print head, preferably at least one exit surface, without contact. Additionally or alternatively, the at least one cleaning device is preferably designed to come into direct contact with the at least one print head. The at least one cleaning device has at least one storage position and at least one use position. The at least one cleaning device is arranged in the at least one storage position along a transport direction of printing material at the position of the transport path below the at least one nozzle bar before or after the at least one nozzle bar. In the at least one storage position, the at least one cleaning device is arranged in front of or behind the at least one nozzle bar along an x-direction, which corresponds to a direction along a shortest side of the respective nozzle bar. The at least one cleaning device is preferably arranged in the at least one position of use within an area between the at least one nozzle bar and the transport path of printing material.

A method for cleaning at least one nozzle bar of at least one printing unit is advantageously created. The at least printing unit comprises at least four nozzle bars, each with at least one print head. At least one print head, preferably at least one exit surface of at least one print head, at least one nozzle bar of the at least four nozzle bars is cleaned without contact by at least one cleaning device. At least one print head, preferably at least one exit surface of at least one print head, at least one nozzle bar of the at least four nozzle bars is cleaned without contact by at least one cleaning device with at least one cleaning element arranged in an operating position and having at least one fluid supply opening. The at least one cleaning element is arranged in the use position within an area between the at least one nozzle bar and a transport path of printing material. The at least one cleaning device is arranged in at least one storage position along a transport direction of printing material at the position of the transport path below the at least one nozzle bar before or after the at least one nozzle bar. The at least one cleaning device is preferably arranged in at least one position of use within an area between the at least one nozzle bar and the transport path of the at least one printing material. The at least one print head of the at least one nozzle bar of the at least four nozzle bars is cleaned by at least one cleaning device with at least one removal unit arranged in at least one use position and having at least one contact element designed as a wiping cloth. The at least one removal unit is arranged in at least one use position within the area between the at least one nozzle bar and the transport path of printing material. The at least one cleaning device and/or the at least one cleaning device preferably optionally cleans the at least one print head of the at least one nozzle bar of the at least four nozzle bars. The at least one nozzle bar is optionally arranged in a printing position or in at least one maintenance position. The at least one nozzle bar is preferably moved in a direction with a larger vertical component and smaller horizontal component from the printing position to the at least one maintenance position and/or from the at least one maintenance position to the printing position. Optionally, the at least one cleaning device and/or the at least one cleaning device are preferably moved into an area between the at least one nozzle bar and the transport path of printing material.

The printing machine comprises at least one printing unit with at least one nozzle bar, the at least one printing unit having at least one Cleaning device comprises, wherein the at least one nozzle bar comprises at least one print head, wherein the at least one nozzle bar has at least one printing position and at least one maintenance position, wherein the at least one printing unit comprises at least one cleaning device. The at least one cleaning device comprises at least one cleaning element with at least one fluid supply opening. Additionally or alternatively, the at least one cleaning device comprises at least one removal unit with at least one contact element. The at least one cleaning device or the at least one cleaning device optionally comes into contact with the at least one print head.

The at least one printing unit includes the at least one cleaning device and the at least one cleaning device. This advantageously enables optimal cleaning of the at least one nozzle bar and/or its at least one print head of the at least one printing unit of the printing press. A distinction can advantageously be made between a cleaning device and a cleaning device for cleaning the at least one nozzle bar. This makes it possible to react advantageously to the respective requirements and/or according to the occurring or existing operating states of the at least one nozzle bar, in particular to how long the at least one nozzle bar has had a printing or non-printing operating state and/or in particular after cleaning will exhibit. Additionally or alternatively, on the degree of contamination present and/or how intensively the at least one nozzle bar and/or its at least one print head has to be cleaned, for example due to the printing fluid used.

Advantageously, the at least one cleaning device and/or the at least one cleaning device prevents the transport of a printing material that is being conveyed along the transport path from being disrupted. Preferably, at least one printing material along the transport path through the at least one The printing unit is conveyed while at least one nozzle bar of the printing unit is cleaned by the at least one cleaning device and/or by the at least one cleaning device. For example, this at least one printing material is printed by at least one additional nozzle bar, for example the at least one printing unit and/or at least one additional printing unit. Downtimes of the printing machine are advantageously minimized.

The contact of the at least one print head with the at least one cleaning device is advantageously designed to protect the print head, in particular its exit surface, since the exit surface of the print head in particular is advantageously not arranged in direct contact with the cleaning device, and damage to the exit surface in particular is thus avoided . In particular, the at least one cleaning device is designed to come into direct contact with the at least one print head. As a result, the at least one cleaning device is preferably designed to clean particularly heavy dirt and/or at least partially insoluble residues of printing fluid and/or to carry out intensive cleaning of the at least one print head. Cleaning the at least one print head with direct contact with the at least one contact element advantageously removes dirt and/or printing fluid which, for example, was not removed by cleaning with the at least one cleaning element and/or which, for example, has completely dried.

In particular, a combination of cleaning with at least one cleaning element of the cleaning device and at least one contact unit of the cleaning device advantageously removes dirt and/or printing fluid completely from the at least one print head of the at least one nozzle bar and/or from a positioning gap between two adjacent print heads.

The at least one cleaning device has at least one guidance system. The at least one guidance system comprises at least one guidance element. The at least one cleaning device is designed to move and/or move and/or is moved along the at least one guide element of the at least one guide system from the at least one storage position to the at least one use position or vice versa. The at least one guide element advantageously enables the at least one cleaning device to be guided quickly and reliably. The risk of the cleaning device tilting and, for example, of the at least one exit surface being damaged as a result is minimized.

Advantageously, at least two cleaning devices have a common guide system, more preferably at least one common guide element of the guide system. Thus, the at least two cleaning devices are advantageously designed to be movable and/or moving together, in particular from the at least one storage position into the at least one use position or vice versa. This advantageously results in a space-saving design of the at least one guide system and/or in simple handling of the at least two cleaning devices. Advantageously, the at least two cleaning devices are designed to move in or out of an area between the at least one nozzle bar and a transport path of at least one printing material due to the advantageous design of the at least one guidance system, in particular without interrupting the movement of a printing material moving along the transport path and /or to influence. The at least two cleaning devices are advantageously arranged independently of their position with respect to the at least one nozzle bar, for example by being inclined with respect to the z-direction, and are advantageously designed to be movable and/or moving in the aligned arrangement. The at least two cleaning devices advantageously have at least two common guide systems. In particular, this prevents the cleaning devices from tilting along the working width of the printing unit and additionally or alternatively fixes the positioning and/or aligned arrangement of the at least two cleaning devices across the working width. As a result, several rows of print heads are advantageously cleaned at the same time, for example. A cost-effective guidance system is advantageously created.

The at least one cleaning device is designed to move and/or be movable along at least one guide element. In an advantageous embodiment, at least two removal units of the at least one cleaning device are designed to move and/or be movable along the at least one guide element. The advantageous embodiment of the at least one guide element results in space savings within the printing assembly.

The pressure unit advantageously includes the at least one sealing element. The at least one sealing element is advantageously designed to protect in particular the at least one print head, preferably the at least two print heads, of the at least one nozzle bar. In this way, pressure fluid in the at least two print heads is advantageously conserved and/or protected from drying out and/or protected from sticking of at least one nozzle of the exit surface of the print head, in particular by the at least one sealing element. The at least one sealing element is advantageously arranged in contact with the at least two print heads when the at least one nozzle bar is in a maintenance position, but is arranged inside the printing assembly. The print heads thus advantageously remain in the printing unit or in their position in the nozzle bar. Advantageously, this eliminates the need to align the print heads before they are and/or are arranged again in at least one printing position after contact with the at least one sealing element. In particular, an arrangement of at least one nozzle bar of the printing unit is advantageous in the printing position or in at least one maintenance position and/or at least one nozzle bar of the printing unit is arranged in the printing position or in the at least one maintenance position if at least one nozzle bar that is different therefrom, in particular at least two print heads of the nozzle bar that is different therefrom, is in contact with the at least one sealing element stand. The nozzle bar arranged in the at least one maintenance position, which is not in contact with the at least one sealing element, is advantageously cleaned in the at least one maintenance position by a cleaning device and/or a cleaning device and/or another maintenance action, such as replacement, is advantageously carried out performed by printheads. In an advantageous embodiment, the at least one cleaning device includes the at least one sealing element. The at least one sealing element is then advantageously designed to be movable and/or moving via at least one guide system of the cleaning device, which results in space savings and/or easier handling within the printing unit, for example.

Another advantage is that the at least one removal unit of the at least one cleaning device is designed to clean the at least one print head of the at least one nozzle bar. In particular by moving along the guide element, the at least one removal unit is advantageously designed to clean at least two print heads arranged in a row, in particular one after the other, along the longest side of the at least one nozzle bar. Advantageously, additionally or alternatively, the at least one removal unit is arranged in at least one storage position or at least one use position by the movement along the at least one guide element. In particular, the at least one removal unit remains independent of its position within the printing unit. By arranging at least two removal units on at least one common carrier, at least two rows of print heads can advantageously be cleaned and/or are cleaned, in particular at the same time. out of it the result is, for example, a time saving in the cleaning step and additionally or alternatively a saving in space, in particular since no guide elements of the individual removal units are necessary. In an advantageous embodiment, a driven accumulator or one connected to a drive of the contact element, which is designed as a wiping cloth, makes it possible for the contact of a contact element used in a cleaning step to be released from the at least one print head and for a contact element that has not yet been used in a cleaning step and/or or clean contact element comes into contact with the at least one print head. The advantageous embodiment of the at least one pressing element advantageously ensures that the at least one contact element is gently brought into contact with the at least one print head. In particular, the resilient design and/or the setting of the contact pressure protects the at least one print head, in particular its exit surface, from damage. In particular, optimal positioning and thus optimal cleaning of the at least one contact element on the at least one print head is ensured by an inclination of the removal unit that corresponds to the inclination of the print head.

Further advantages can be seen from the following description.

Exemplary embodiments of the invention are shown in the drawings and are described in more detail below.

Fig. 1

eine schematische perspektivische Darstellung zumindest eines Druckaggregates mit zumindest einem Düsenbalken und zumindest einem gegenübergestellten Bedruckstoffleitelement sowie einem Bedruckstoff;

Fig. 2a

eine schematische Darstellung zumindest eines Düsenbalkens mit zwei Reihen schräg überlappender Druckköpfe;

Fig. 2b

eine schematische Darstellung einer alternativen Ausführungsform zumindest eines Düsenbalkens mit mehreren Druckköpfen, welche versetzt zueinander in einer Doppelreihe angeordnet sind;

Fig. 3a

eine schematische perspektivische Darstellung von zumindest zwei Druckköpfen, die durch einen Positionierspalt zueinander beabstandet angeordnet sind, mit zumindest einer ersten, dem Positionierspalt zugeordneten Zuführeinrichtung, und einer zweiten Zuführeinrichtung, wobei die zweite Zuführeinrichtung als Schnitt dargestellt ist;

Fig. 3b

eine schematische Zerlegung einer beispielhaften Zuführeinrichtung;

Fig. 4a

eine schematische Darstellung eines Druckaggregates mit mehreren Düsenbalken, wobei mindestens ein Düsenbalken in Druckposition und mindestens ein Düsenbalken in Ruheposition angeordnet ist;

Fig. 4b

eine schematische Darstellung eines Druckaggregates mit mehreren Düsenbalken gemäß Fig. 4a, wobei mindestens ein Düsenbalken in einer ersten Wartungsposition angeordnet ist;

Fig. 4c

eine beispielhafte Darstellung eines Druckaggregates mit vier in der ersten Wartungsposition angeordneten Düsenbalken und vier in einer Gebrauchsposition angeordneten Reinigungsvorrichtungen;

Fig. 4d

eine schematische Darstellung mit zwei in der Druckposition angeordneten Düsenbalken und jeweils zwei auf einem gemeinsamen Führungssystem angeordneten Reinigungsvorrichtungen in einer Lagerposition;

Fig. 4e

eine beispielhafte Darstellung von vier in der Ruheposition angeordneten Düsenbalken und vier Reinigungsvorrichtungen und einer Reinigungseinrichtung;

Fig. 4f

eine schematische Darstellung von vier in der Ruheposition angeordneten Düsenbalken, und vier in der Lagerposition angeordneten Reinigungsvorrichtungen und einer Reinigungseinrichtung mit in einer Einsatzposition angeordneten Entfernungseinheiten;

Fig. 4g

eine schematische Darstellung von vier in einer zweiten Wartungsposition angeordneten Düsenbalken und vier in der Lagerposition angeordneten Reinigungsvorrichtungen und einer Reinigungseinrichtung mit in einer Einsatzposition angeordneten Entfernungseinheiten;

Fig. 4h

eine beispielhafte Darstellung von vier in einer zweiten Wartungsposition angeordneten Düsenbalken und vier in der Lagerposition angeordneten Reinigungsvorrichtungen und einer Reinigungseinrichtung mit in einer Einsatzposition angeordneten Entfernungseinheiten;

Fig. 5a

eine Ansicht von zumindest vier Druckköpfen innerhalb einer Reihe eines Düsenbalkens und einer Reinigungsvorrichtung, wobei zumindest ein Reinigungselement zumindest einem Druckkopf gegenüberliegend und mit diesem in direktem oder indirekten Kontakt stehend angeordnet ist und wobei der Übersichtlichkeit halber nur vier Druckköpfe dargestellt sind;

Fig. 5b

eine Schnittdarstellung der Druckköpfe des Düsenbalkens und der Reinigungsvorrichtung gemäß einem Schnitt entlang der Linie V - V in Fig. 5a;

Fig. 6a

eine Darstellung eines Reinigungselementes;

Fig. 6b

eine Darstellung des Reinigungselementes gemäß Fig. 6a in perspektivischer Ansicht;

Fig. 6c

eine Darstellung eines alternativen Reinigungselementes in perspektivischer Ansicht;

Fig. 7a

eine Darstellung einer weiteren alternativen Ausführungsform eines Reinigungselementes;

Fig. 7b

eine Darstellung der weiteren alternativen Ausführungsform eines Reinigungselementes gemäß Fig. 7a in perspektivischer Ansicht;

Fig. 7c

eine Darstellung der weiteren alternativen Ausführungsform eines Reinigungselementes gemäß Fig. 7a und/oder Fig. 7b mit zumindest einem zusätzlichen Wischer;

Fig. 7d

eine Anordnung eines Reinigungselementes mit vier Reinigungsbereichen an einem Düsenbalken mit vier Reihen an Druckköpfen;

Fig. 8a

eine beispielhafte Darstellung eines Düsenbalkens mit zwei Reihen von Druckköpfen in Kontakt zu zumindest einen Reinigungselement der zumindest einen Reinigungsvorrichtung;

Fig. 8b

eine beispielhafte Darstellung eines Düsenbalkens mit zwei Reihen von Druckköpfen in Kontakt zu jeweils zumindest einem Dichtelement;

Fig. 9

eine erste Ausführung eines Druckaggregats mit einem zylinderförmigen Bedruckstoffleitelement, wobei jeweils zwei Reinigungsvorrichtungen ein gemeinsames Führungssystem aufweisen;

Fig. 10

eine weitere beispielhafte Ausführung eines Druckaggregats mit einem zylinderförmigen Bedruckstoffleitelement, wobei jeweils zwei Reinigungsvorrichtungen ein gemeinsames Führungssystem aufweisen und wobei das Druckaggregat zusätzlich zu der Reinigungsvorrichtung eine Reinigungseinrichtung mit zumindest zwei Entfernungseinheiten umfasst;

Fig. 11

die weitere beispielhafte Ausführung eines Druckaggregats mit einem zylinderförmigen Bedruckstoffleitelement aus Fig. 10 in seitlicher Ansicht;

Fig. 12a

eine beispielhafte Darstellung einer Reinigungseinrichtung mit in der Vorratsposition angeordneten Entfernungseinheiten bei einem Druckaggregat mit einem zylinderförmigen Bedruckstoffleitelement;

Fig. 12b

eine beispielhafte Darstellung der Reinigungseinrichtung aus Fig. 12a mit in der zumindest einen Einsatzposition angeordneten Entfernungseinheiten;

Fig. 13a

eine beispielhafte Entfernungseinheit in dreidimensionaler Darstellung mit in einem Gehäuse angeordneten Vorrat an Kontaktelement;

Fig. 13b

eine beispielhafte Entfernungseinheit aus Fig. 13a in einem seitlichen Schnitt;

Fig. 13c

eine beispielhafte Entfernungseinheit aus Fig. 13a und Fig. 13b in einem weiteren seitlichen Schnitt;

Fig. 13d

eine beispielhafte Entfernungseinheit aus Fig. 13a bis Fig. 13c in dreidimensionaler Darstellung mit geöffnetem Vorrat;

Fig. 14

mehrere beispielhafte Entfernungseinheiten auf einem gemeinsamen Träger;

Fig. 15

eine alternative beispielhafte Reinigungseinrichtung mit zwei horizontal nebeneinander angeordneten Entfernungseinheiten bei einem Druckaggregat mit einem linearen Transportweg in x-Richtung;

Fig.16a

eine weitere alternative Ausführung eines Druckaggregats mit einem linearen Transportweg in x-Richtung, wobei das Druckaggregat zumindest eine Reinigungsvorrichtung in Lagerposition und zumindest eine Reinigungseinrichtung Einsatzposition umfasst;

Fig. 16b

eine weitere Darstellung des Druckaggregats mit einem linearen Transportweg in x-Richtung aus Fig. 16a, wobei der Düsenbalken ausgeblendet ist;

Fig. 16c

eine weitere Darstellung des Druckaggregats mit einem linearen Transportweg in x-Richtung aus Fig. 16a oder Fig. 16b, wobei die Reinigungseinrichtung in ihre Vorratsposition geschwenkt ist und die Reinigungsvorrichtung in ihrer Lagerposition angeordnet ist;

Fig. 16d

eine weitere Darstellung des Druckaggregats mit einem linearen Transportweg in x-Richtung aus Fig. 16a, Fig. 16b oder Fig. 16c, wobei die Reinigungseinrichtung in ihre Vorratsposition geschwenkt ist und die Reinigungsvorrichtung in ihrer Gebrauchsposition angeordnet ist;

Fig. 17a

eine Seitenansicht des Druckaggregats mit einem linearen Transportweg in x-Richtung entsprechend Fig. 16a oder Fig. 16b, wobei die Reinigungseinrichtung in der Einsatzposition und die Reinigungsvorrichtung in der Lagerposition angeordnet ist;

Fig. 17b

eine Seitenansicht des Druckaggregats mit einem linearen Transportweg in x-Richtung entsprechend Fig. 16c, wobei die Reinigungseinrichtung in ihre Vorratsposition geschwenkt ist und die Reinigungsvorrichtung in ihrer Lagerposition angeordnet ist;

Fig. 17c

eine Seitenansicht des Druckaggregats mit einem linearen Transportweg in x-Richtung entsprechend Fig. 16d, wobei die Reinigungseinrichtung in ihre Vorratsposition geschwenkt ist und die Reinigungsvorrichtung in ihrer Gebrauchsposition angeordnet ist.

Show it:

1

a schematic perspective view of at least one printing unit with at least one nozzle bar and at least one opposing printing material guide element and a printing material;

Figure 2a

a schematic representation of at least one nozzle bar with two rows of obliquely overlapping printheads;

Figure 2b

a schematic representation of an alternative embodiment of at least one nozzle bar with a plurality of print heads which are offset from one another in a double row;

Figure 3a

a schematic perspective view of at least two print heads, which are arranged spaced apart from one another by a positioning gap, with at least a first feed device assigned to the positioning gap, and a second feed device, the second feed device being shown in section;

Figure 3b

a schematic decomposition of an exemplary feeder;

Figure 4a

a schematic representation of a printing unit with several nozzle bars, wherein at least one nozzle bar is arranged in the printing position and at least one nozzle bar is arranged in the rest position;

Figure 4b

a schematic representation of a printing unit with several nozzle bars according to FIG Figure 4a wherein at least one nozzle bar is located in a first servicing position;

Figure 4c

an exemplary representation of a printing unit with four nozzle bars arranged in the first maintenance position and four cleaning devices arranged in a use position;

Figure 4d

a schematic representation with two nozzle bars arranged in the printing position and two cleaning devices arranged on a common guide system in a storage position;

Figure 4e

an exemplary representation of four arranged in the rest position nozzle bar and four cleaning devices and a cleaning device;

Fig. 4f

a schematic representation of four nozzle bars arranged in the rest position, and four cleaning devices arranged in the storage position and one cleaning device with removal units arranged in a use position;

Fig. 4g

a schematic representation of four nozzle bars arranged in a second maintenance position and four cleaning devices arranged in the storage position and a cleaning device with removal units arranged in a use position;

Fig. 4h

an exemplary representation of four nozzle bars arranged in a second maintenance position and four cleaning devices arranged in the storage position and a cleaning device with removal units arranged in a use position;

Figure 5a

a view of at least four print heads within a row of a nozzle bar and a cleaning device, wherein at least one cleaning element is arranged opposite at least one print head and is in direct or indirect contact with it and only four print heads are shown for the sake of clarity;

Figure 5b

a sectional view of the print heads of the nozzle bar and the cleaning device according to a section along the line V - V in Figure 5a ;

Figure 6a

a representation of a cleaning element;

Figure 6b

a representation of the cleaning element according to FIG Figure 6a in perspective view;

Figure 6c

a representation of an alternative cleaning element in a perspective view;

Figure 7a

a representation of a further alternative embodiment of a cleaning element;

Figure 7b

a representation of the further alternative embodiment of a cleaning element according to FIG Figure 7a in perspective view;

Figure 7c

a representation of the further alternative embodiment of a cleaning element according to FIG Figure 7a and or Figure 7b with at least one additional wiper;

Figure 7d

an arrangement of a cleaning element with four cleaning areas on a nozzle bar with four rows of print heads;

Figure 8a

an exemplary representation of a nozzle bar with two rows of print heads in contact with at least one cleaning element of the at least one cleaning device;

Figure 8b

an exemplary representation of a nozzle bar with two rows of print heads in contact with at least one sealing element;

9

a first embodiment of a printing unit with a cylindrical Printing material guide element, with two cleaning devices each having a common guide system;

10

a further exemplary embodiment of a printing unit with a cylindrical printing material guide element, wherein two cleaning devices each have a common guide system and wherein the printing unit comprises a cleaning device with at least two removal units in addition to the cleaning device;

11

the further exemplary embodiment of a printing unit with a cylindrical printing material guide element 10 in lateral view;

12a

an exemplary illustration of a cleaning device with removal units arranged in the storage position in a printing unit with a cylindrical printing material guide element;

Figure 12b

an exemplary representation of the cleaning device 12a with removal units arranged in the at least one deployment position;

13a

an exemplary removal unit in a three-dimensional representation with a supply of contact element arranged in a housing;

Figure 13b

an example distance unit 13a in a side cut;

13c

an example distance unit 13a and Figure 13b in another side cut;

Figure 13d

an example distance unit Figures 13a to 13c in three-dimensional representation with open stock;

14

multiple example range units on a common carrier;

15

an alternative exemplary cleaning device with two removal units arranged horizontally next to one another in a printing unit with a linear transport path in the x-direction;

Figure 16a

a further alternative embodiment of a printing unit with a linear transport path in the x-direction, the printing unit comprising at least one cleaning device in the storage position and at least one cleaning device in the operating position;

Figure 16b

Another representation of the printing unit with a linear transport path in the x-direction 16a , with the nozzle bar hidden;

Figure 16c

Another representation of the printing unit with a linear transport path in the x-direction 16a or Figure 16b wherein the cleaning device is pivoted into its storage position and the cleaning device is arranged in its storage position;

Figure 16d

Another representation of the printing unit with a linear transport path in the x-direction 16a , Figure 16b or Figure 16c wherein the cleaning device is pivoted to its storage position and the cleaning device is located in its use position;

Figure 17a

a side view of the printing unit with a linear transport path in the x-direction accordingly 16a or Figure 16b , wherein the cleaning device in the use position and the cleaning device in the storage position is arranged;

Figure 17b

a side view of the printing unit with a linear transport path in the x-direction accordingly Figure 16c wherein the cleaning device is pivoted into its storage position and the cleaning device is arranged in its storage position;

Figure 17c

a side view of the printing unit with a linear transport path in the x-direction accordingly Figure 16d wherein the cleaning device is pivoted into its storage position and the cleaning device is arranged in its position of use.

A printing press comprises at least one printing assembly 01 and at least one printing substrate guide element 02 for guiding at least one printing substrate 03. The at least one printing assembly 01, which is embodied in particular as a non-impact printing assembly 01, preferably as an inkjet printing assembly 01, comprises at least one nozzle bar 04 with at least a print head 08, preferably at least one inkjet print head 08, more preferably a print head 08 that operates according to the piezo inkjet process. At least one printing material guide element 02 is preferably assigned to the nozzle bar 04 in question. The at least one print head 08 has at least one exit surface 09. In the piezo inkjet process, droplets of print head 08 are preferably formed and ejected by mechanical deformation of at least one nozzle chamber of print head 08, in particular as a result of an electronic signal and the piezoelectric properties of the material of the nozzle chamber. For example, the printing press has at least two printing units 01, each with at least one, preferably at least two, more preferably at least four, nozzle bars 04. For example, at least eight different colors can thus be printed and/or the printing material 03 can be printed on both the top and the bottom.

Within this document, the printing press is a machine that applies at least one printing fluid to at least one printing substrate 03 and/or is capable of applying it.

The at least one printing substrate 03 is, above and below, a substrate that can be printed on by the at least one printing unit 01 with a medium, in particular a printing fluid. Printing substrate 03 is preferably embodied as paper and/or cardboard and/or corrugated cardboard and/or cardboard. The printing material 03 is designed in particular as a web or sheet.

According to DIN 6730, paper is a flat material consisting essentially of fibers, mostly of vegetable origin, which is formed by draining a fibrous suspension on a sieve. This creates a fiber felt that is then dried. The mass per unit area of paper is preferably at most 225 g/m ² . According to DIN 6730, cardboard is a flat material consisting essentially of fibers of plant origin, which is formed by dewatering a fibrous suspension on one or between two screens. The fiber structure is compacted and dried. Cardboard is preferably made from cellulose by gluing or pressing together. Cardboard is preferably designed as solid cardboard or corrugated cardboard. Preferably the basis weight of paperboard is over 225 g/m ² . Corrugated cardboard is cardboard made from one or more layers of corrugated paper glued to one layer or between several layers of another preferably smooth paper or cardboard. In the foregoing and in the following, the term board refers to a paper fabric that is preferably coated on one side and has a mass per unit area of at least 150 g/m ² and at most 600 g/m ² . Cardboard preferably has high strength relative to paper.

The at least one printing substrate 03 is preferred, for example at least part of the at least one printing material 03, is designed as an intermediate product for the production of an end product and/or is further processed, for example, to form a desired or required end product and/or is designed to be further processable for this purpose. For example, the at least one printing substrate 03 is in the form of paper and is further processed into corrugated cardboard. The desired or required end product, which is preferably produced by further processing at least part of the printing substrate 03, is preferably a packaging material, more preferably at least one folding box.

The at least one printing substrate 03 preferably has at least one pigment coating. The at least one printing substrate 03 preferably has a pigment coating of at least 5%, preferably at least 8%, more preferably at least 10%, of the total weight of the at least one printing substrate 03. Additionally or alternatively, the at least one printing substrate 03 has a pigment coating of no more than 30%, preferably no more than 25%, more preferably no more than 20% of the total weight of the at least one printing substrate 03. In the foregoing and in the following, a pigment coat preferably refers to a coating material applied to the surface of the at least one printing substrate 03. Printing substrate 03, which has at least one coating material, is preferably referred to as coated printing substrate 03. The surface of printing substrate 03 is preferably at least partially finished by applying the at least one coating. A coated printing substrate 03 preferably has better printability and/or a smoother surface and/or absorption of printing fluid that is adapted to the required printed image compared to an uncoated printing substrate 03 without any coating applied. The at least one paint preferably has at least one binder and/or at least one additive and/or at least one pigment.

The at least one printing substrate 03 preferably has a total weight, i.e. preferably including the at least one pigment coating, of at least 120 g/m ² (one hundred and twenty grams per square meter), preferably at least 130 g/m ² (one hundred and thirty grams per square meter), more preferably at least 145 g/m ² (one hundred and forty-five grams per square meter), and additionally or alternatively a total weight of at most 260 g/m ² (two hundred and sixty grams per square meter), preferably a maximum of 240 g/m ² (two hundred and forty grams per square meter), more preferably a maximum of 230 g/m ² (two hundred and thirty grams per square meter). Additionally or alternatively, the at least one printing substrate 03 preferably has a thickness of at least 120 µm (one hundred and twenty micrometers), preferably at least 140 µm (one hundred and forty micrometers), more preferably 160 µm (two hundred and eighty micrometers), and additionally or alternatively a maximum thickness of 300 µm ( three hundred microns), preferably at most 280 µm (two hundred and eighty microns), more preferably at most 260 µm (two hundred and sixty microns).

The at least one nozzle bar 04 preferably comprises at least two print heads 08, which are arranged next to one another, in particular adjacent to one another, preferably adjacent, in a y-direction and/or which extend in particular over the entire working width of printing assembly 01. Preferably, enough print heads 08 are arranged in the nozzle bar 04 along the longest side of the nozzle bar 04 so that the entire working width of the printing unit 01 and/or the nozzle bar 04 and/or the printing press is covered by at least one print head 08. The at least one nozzle bar 04 preferably extends over the entire working width of the printing unit 01 and/or the printing press. The respective print heads 08 of a nozzle bar 04 are preferably arranged in the y-direction in at least one row, preferably in at least two rows, for example in exactly two rows. The at least one nozzle bar 04 preferably comprises the at least two rows of at least two print heads 08 arranged next to one another. The at least one nozzle bar 04 preferably extends over the entire working width of the printing assembly 01. In particular, at least two print heads 08 of the nozzle bar 04 are arranged in a y -direction side by side arranged and/or connected to one another via a fixed axis in the y-direction, for example, to form a group of print heads 08. The at least one nozzle bar 04 preferably extends longitudinally in the y-direction. The at least one nozzle bar 04 preferably extends along its width in the x-direction. The longitudinal extension is preferably greater than the width extension. The longitudinal extent preferably has a larger number of print heads 08 than the extent in the width direction.

The y-direction and an x-direction and a z-direction form a Cartesian coordinate system. The x-direction corresponds to a direction along the shortest side of the respective nozzle bar 04. The y-direction corresponds to a direction along the longest side of the respective nozzle bar 04. The y-direction is preferably parallel to an axis of rotation of the at least one printing material guide element 02. Preferably tensioning the x-direction and the y-direction have a horizontal plane. The longest side of the at least one nozzle bar 04 is preferably that side of the at least one nozzle bar 04 along which side at least two, preferably at least four, more preferably at least eight, print heads 08 are arranged in a row. The at least one row of print heads 08, preferably at least two rows of print heads 08, preferably extends along the longest side of the at least one nozzle bar 04. The shortest side of the at least one nozzle bar 04 is preferably arranged orthogonally to its longest side. Preferably, only one print head 08 is arranged in each row along the shortest side of the at least one nozzle bar 04. For example, two print heads 08 each from a row of print heads 08 are arranged one behind the other along the shortest side of the at least one nozzle bar. The z-direction is preferably parallel to a normal vector of a plane which is spanned by the x-direction and the y-direction. The z-direction preferably corresponds to a vertical direction.

A transverse direction A is preferably a direction which is parallel to a longest one side of the at least one nozzle bar 04. The transverse direction A is preferably arranged parallel to the y-direction. The x-direction is preferably arranged orthogonally to the transverse direction A. The working width is in particular parallel to the transverse direction A. Furthermore, the transverse direction A is preferably orthogonal to a transport direction T.

The working width is, above and below, the maximum width that a printing substrate 03 may have in order to still be able to be processed with the at least one printing unit 01 of the printing press; this therefore corresponds to the maximum width of the printing medium that can be processed with the at least one printing unit 01 of the printing press respective printing substrate 03. The working width preferably corresponds to an extension of the at least one exit surface 09 of at least one print head 08 along the y-direction, which is preferably used for printing the printing substrate 03.

The spatial area provided for the transport of a printing substrate 03, which the printing substrate 03 occupies at least temporarily if it is present, is the transport path. The transport path is defined by at least one means of transport, in particular by the at least one printing material guide element 02. The at least one printing substrate guide element 02 is preferably configured as at least one roller and/or at least one cylinder and/or at least one support and/or at least one other device for guiding the printing substrate 03 when the printing press is in a printing operating state.

The transport direction T is a direction provided for a printing operating state of at least one printing unit 01 of the printing press, in which direction the printing material 03 is transported if it is present at any point along the transport path. The transport direction T is preferably a direction that runs parallel to a shortest side of the at least one nozzle bar 04. The transverse direction A is the axial direction orthogonal to the transport direction T. Preferred For example, the transport direction T is parallel to the x-direction and/or, for example, the transverse direction A is parallel to the y-direction of the Cartesian coordinate system at a location where the distance between a relevant print head 08 and the transport path is the shortest.

In the foregoing and in the following, a printing fluid refers to inks, printing inks and/or varnishes, as well as other materials, which are and/or can be transferred to a printing substrate 03 by a printing press or at least one printing unit 01 of the printing press. A printing fluid located in a volume of print head 08, in particular in the form of drops, can preferably leave the volume of print head 08 in question through an opening in exit surface 09. The at least one nozzle bar 04 preferably has cyan (C) or magenta (M) or yellow (Y) or black (K) as the color of the printing fluid. Two different nozzle bars 04 preferably have different pressure fluids. At least one nozzle bar 04, preferably at least one nozzle bar 04 of the at least four nozzle bars 04, of the printing press or of the at least one printing unit 01 preferably has cyan (C) or magenta (M) or yellow (Y) or black (K) as the color of the pressure fluid. For example, at least one nozzle bar 04 has another pressurized fluid, which is embodied, for example, as a paint or primer. The at least four nozzle bars 04 of the printing assembly 01 preferably have different colors from one another.

The printing fluid of the at least one print head 08 is preferably embodied as printing fluid for packaging printing and/or for printing on packaging material. The at least one nozzle bar 04, in particular the at least one print head 08, preferably has printing fluid which has a viscosity, preferably a dynamic viscosity, of at least 3 mPa*s (three millipascal seconds), preferably at least 4.5 mPa*s (four point five Millipascal seconds) and/or which has a maximum viscosity of 6 mPa*s (six millipascal seconds), preferably at most 5.5 mPa*s (five point five millipascal seconds). Preferably, the foregoing viscosity values refer to the viscosity between 20°C (twenty degrees Celsius) and 40°C (forty degrees Celsius), preferably at least 25°C (twenty-five degrees Celsius) and/or at most 35°C (thirty-five degrees Celsius). degrees Celsius), and/or were preferably determined according to DIN EN ISO 2884-1:2006-09. The printing fluid is preferably water-based and/or at least partly water-soluble and/or preferably has at least one pigment. The at least one nozzle bar 04 preferably has printing fluid which has a pigment content of the printing fluid of at least 1%, preferably at least 2%, more preferably at least 3%, more preferably at least 4% and/or which preferably has a pigment content of the printing fluid of at most 18%, preferably at most 14%, more preferably at most 10%, more preferably at most 7%. For example, the completely dried printing fluid with cleaning agent is more difficult to dissolve than printing fluid with a residual content of liquid printing fluid.

A cleaning agent and/or cleaning fluid refers above and below in particular to a liquid that is used to clean individual components of a printing press, in particular to clean at least one exit surface 09 of at least one print head 08. The cleaning agent is preferably used to remove residues of the at least one printing fluid on components of the printing press, in particular the exit surface 09 of at least one print head 08 and/or a positioning gap 07 between two print heads 08 arranged next to one another. For example, the cleaning agent contains water and/or at least one Surfactant and / or at least one solvent. For example, the at least one cleaning fluid has pressure fluid, which preferably contains no pigments. The at least one cleaning fluid is preferably designed to at least partially dissolve the pressure fluid of the at least one nozzle bar 04.

A printing assembly 01 comprises at least one nozzle bar 04. A printing assembly 01 comprises at least four nozzle bars 04, for example exactly four nozzle bars 04. The at least one nozzle bar 04 is arranged, for example, in at least one printing position, for example shown in 1 . The printing position describes that position of the nozzle bar 04 in which the nozzle bar 04 is arranged when the printing press is in a printing operating state. At least one printing substrate 03 is preferably printed with printing fluid in the printing operating state by the at least one print head 08 of the at least one nozzle bar 04 arranged in the printing position, preferably the at least one nozzle bar 04 of the at least four nozzle bars 04. A respective print head 08 arranged in its printing position is preferably characterized in that the respective exit surface 09 is separated from the intended transport path for at least one printing substrate 03 and/or from the at least one printing substrate 03 and/or from the printing substrate guide element 02 assigned to the respective nozzle bar 04 Has a distance that is at most 5 mm (five millimeters), preferably at most 1.5 mm (one point five millimeters) and/or at least 0.5 mm (zero point five millimeters), preferably at least 1.0 mm (one point five millimeters). zero millimeters). The at least one printing assembly 01 comprises at least one cleaning device 18 and/or at least one cleaning system 61.

For example, when the printing press is in the printing operating state, at least one printing material 03 is guided along the transport direction T by means of the at least one printing material guide element 02 through a space between the respective printing material guide element 02 and the relevant nozzle bar 04. Facing the printing material guide element 02, the at least one print head 08, each with at least one exit surface 09, is positioned in the relevant nozzle bar 04.

The at least one nozzle bar 04 comprises at least one print head 08, in particular at least two print heads 08. The at least two print heads 08 are preferably arranged side by side, in particular adjacent. The at least two print heads 08 are preferably arranged next to one another in the y-direction, in particular adjacent to one another, preferably adjacent and/or preferably partially overlapping in the x-direction. The individual print heads 08 of the nozzle bar 04 in question are preferably arranged along the y-direction within at least one row, preferably within at least two, in particular parallel, rows of print heads 08. The respective exit surfaces 09 of at least two print heads 08 arranged next to one another, preferably adjacent ones, in particular within a row, are each positioned at a distance from one another, in particular in the y direction, by the at least one positioning gap 07. The at least two print heads 08 arranged next to one another in the y direction are preferably arranged spaced apart from one another by the at least one positioning gap 07. More preferably, the at least two print heads 08 arranged next to one another in the y direction, in particular adjacent print heads 08, in particular the respective exit surfaces 09 of the print heads 08 arranged next to one another in particular in the y direction, delimit the corresponding positioning gap 07 in the y direction. This makes it easier, for example, to position the respective print heads 08.

In one exemplary embodiment of a nozzle bar 04, the print heads 08 of the nozzle bar 04, which are preferably arranged in a row in the y direction, for example in the x direction, preferably in the transport direction T, are each arranged at least partially obliquely overlapping and/or preferably the respective exit surfaces 09 of the corresponding print heads 08 are arranged spaced apart from one another in the y-direction by the respective one positioning gap 07.

In an alternative embodiment of a nozzle bar 04, the nozzle bar 04 comprises, for example, at least two preferably parallel rows of print heads 08, one row in the y-direction comprising at least two print heads 08, preferably a large number of print heads 08. The print heads 08 of each in the y-direction The rows arranged in this way are preferably arranged offset from one another in the x-direction, as a result of which the respective exit surfaces 09 of the print heads 08 arranged offset from one another preferably at least partially overlap.

A print head 08 comprises at least one exit surface 09 and at least one, in particular at least two, contact surfaces 11. The at least one contact surface 11 is preferably embodied as a spacer surface 11. The contact surface 11 is preferably designed in such a way that the exit surface 09 is arranged to avoid unwanted contact with components or other bodies, for example when cleaning the exit surface 09. The spacer surface 11 preferably extends over the entire extent of the respective print head 08. Dimensions over only part of the expansion of the respective print head 08 is also possible.

The exit surface 09 of a print head 08 is a surface of the respective print head 08 which faces the transport path and lies in particular in a plane whose normal vector is arranged parallel to the z-direction. The exit surface 09 is designed, for example, as a parallelogram, preferably as a non-rectangular parallelogram. A further exemplary embodiment of the exit surface 09 is a trapezium, in particular an isosceles trapezium. The exit surface 09 preferably includes at least one opening, in particular a large number of openings, through which the printing fluid can leave at least one volume, in particular a large number of volumes, of the relevant print head 08, preferably in the form of drops.

An exit direction of the at least one exit surface 09 is the direction in which the printing fluid exits and/or can exit the respective print head 08 through at least one opening of the corresponding exit surface 09. The exit direction of the exit surface 09 is preferably at least in one component and more preferably completely parallel to a surface normal of the exit surface 09 of the respective print head 08.

The respective exit surfaces 09 of the relevant print heads 08 of a nozzle bar 04, which are arranged next to one another in the y-direction, are preferably arranged at least partially adjacent to one another in the x-direction, more preferably at least partially overlapping. The sum of all exit surfaces 09 within at least one row, for example at least two rows, of print heads 08 of a nozzle bar 04 arranged in the y-direction extends over the entire working width of the respective nozzle bar 04. Each position is therefore along a straight line in y - Direction on the transport path associated with an opening within an exit surface 09 of the nozzle bar 04 in question, through which the pressure fluid can leave a volume of a corresponding print head 08 of the nozzle bar 04.

At least two print heads 08 are preferably arranged next to one another in the y direction, in particular adjacent to one another, within a nozzle bar 04. In particular, two print heads 08 are arranged adjacent to one another in the y-direction within a row of print heads 08. For example, in order to position the at least two adjacent print heads 08 in question of the corresponding nozzle bar 04, the respective exit surfaces 09 of the at least two print heads 08 are preferably arranged spaced apart from one another by the one positioning gap 07. The at least one positioning gap 07 preferably extends in the y-direction by a maximum of 0.5 mm (zero point five millimeters), in particular by a maximum of 0.2 mm (zero point two millimeters). In particular, the at least one positioning gap 07 extends in the y-direction by at least 0.05 mm (zero point zero five millimeters), preferably at least 0.1 mm (zero point zero millimeters).

A cleaning direction G and/or the y-direction preferably points to a longitudinal direction of the positioning gap 07 in a positive mathematical direction of rotation, rotated counterclockwise, this means a preferably flat angle, in particular a positioning angle 46, of at least 50° (fifty degrees), preferably at least 60° (sixty degrees), and at most 130° (one hundred and thirty degrees, preferably at most 120° (one hundred and twenty degrees). For example, this shows in particular that the longitudinal direction of the positioning gap 07, preferably the positioning angle 46 of the longitudinal direction of the positioning gap 07, is arranged in the plane spanned by the x-direction and the y-direction The longitudinal direction of the positioning gap 07 is the direction in which the greatest extent of the positioning gap 07 occurs.The longitudinal direction of the positioning gap 07 within the plane spanned by the x-direction and the y-direction is preferably oriented with at least one component orthogonal to the cleaning direction G. For example positioning angle 46 thus corresponds to the at least partial oblique overlap in the x-direction of at least two print heads 08 arranged next to one another, in particular adjacent to one another.

At least one feed device 13 for ejecting a fluid is preferably assigned to the respective positioning gap 07. The at least one feed device 13 is preferably designed as a nozzle 13, in particular as a cleaning nozzle 13. More preferably, the feed device 13 is designed as a nozzle 13 for ejecting fluid, preferably a gaseous fluid and/or compressed gas. The feed device 13 is preferably arranged in such a way that a fluid, for example a compressed gas and/or a gas mixture, in particular air, and/or a liquid, can flow through the respective feed device 13 in such a way that the fluid exits the feed device 13, in particular through an outlet opening 17 , In an outlet direction L can leave. At least one component of the outlet direction L, preferably in the z-direction, is preferably directed towards the respective positioning gap 07. At least one feed device 13 for ejecting a fluid with an outlet direction L is preferably assigned to the respective positioning gap 07, with at least one component of the outlet direction L being applied to the respective Positioning gap 07 is directed. The outlet opening 17 of the feed system 13 is preferably directed towards the positioning gap 07, for example from above and/or from above the printing material guide element 02 in the direction of the printing material guide element 02.

The at least one feed device 13, which is directed towards the at least one positioning gap 07 between at least two print heads 08 arranged next to one another, preferably makes it more difficult and/or prevents, for example, the penetration of printing fluid and/or dirt into the positioning gap 07 and/or deposits and/or Settling of printing fluid and/or dirt in the positioning gap 07 in question. In a cleaning process, for example, this supports the cleaning of the positioning gap 07 in question using, for example, the at least one cleaning device 18 and/or makes it more difficult for printing fluid and/or printing fluid to deposit and/or settle out during a printing process Dirt.

The feed device 13 preferably comprises at least one feed element 14 and/or at least one outlet element 16; 43, wherein the at least one outlet element 16; 43 is preferably embodied as at least one delimiting element 16 and/or at least one opening element 43, and/or the at least one outlet opening 17. The feed device 13 preferably has at least one cavity, which is preferably connected to the at least one outlet opening 17. For example, the at least one outlet element 16; 43 each formed as at least one metal sheet or a tube. The delimiting element 16 is preferably flat, for example as a flat sheet metal. The at least one opening element 43 preferably comprises at least one cutout 17, which is more preferably configured as the at least one outlet opening 17.

In a preferred embodiment, the at least one feed system 13 is preferably equipped with at least one print head 08 of the respective print heads 08 connected, which delimit the respective positioning gap 07. Additionally or alternatively, the at least one nozzle bar 04 preferably comprises the at least one feed device 13, with the feed device 13 preferably being positioned in the z-direction on that side of the exit surface 09 which faces away from the at least one opening of the respective exit surface 09. Additionally or alternatively, the at least one nozzle bar 04 preferably includes the at least one feed device 13, with the feed device 13 preferably being arranged in the z-direction on the side facing away from the transport path of at least one exit surface 09 of at least one print head 08 of the corresponding nozzle bar 04 and/or with the respective outlet direction L of the at least one feed system 13 is directed towards at least one positioning gap 07 between two print heads 08, which are preferably adjacent in the y direction.

The at least one feed system 13 is preferably arranged in the z-direction on the side of the respective exit surface 09 that faces away from the transport path. More preferably, the at least one feed device 13 is positioned on that side of the print head 08, in particular the exit surface 09, on which the print head 08 is attached to the corresponding nozzle bar 04. More preferably, the at least one feed device 13 is positioned such that the outlet direction L is directed from one side of the print head 08, in particular one side of the exit surface 09, onto the at least one positioning gap 07, in which the print head 08 is attached to the corresponding nozzle bar 04 .

The feed device 13 is preferably arranged at a distance from the positioning gap 07 in the z-direction. More preferably, the feed device 13 is arranged adjacent to the positioning gap 07 in the z-direction. The outlet opening 17 is preferably arranged at a distance from the positioning gap 07 in the z-direction. More preferably, the outlet opening 17 is arranged adjacent to the positioning gap 07 in the z-direction. This means that the feed device 13, in particular the respective Outlet opening 17 is preferably arranged at a distance in the z-direction from the respective exit surfaces 09 of two print heads 08, which are arranged next to one another in the y-direction and whose exit surfaces 09 delimit the corresponding positioning gap 07.

The outlet direction L is preferably a direction in which a fluid, for example a gas and/or a gas mixture, in particular air, and/or a liquid, the feed device 13 in question, preferably through the at least one outlet element 16; 43, in particular the at least one outlet opening 17, can leave. Preferably, at least one component of the outlet direction L is parallel and/or points in an identical direction to the outlet direction of the at least one outlet surface 09 of a print head 08 of the nozzle bar 04. More preferably, at least one component of the outlet direction L is parallel and/or points in an identical direction Direction to the surface normal of the exit surface 09 of the respective print head 08 and/or a direction in which the printing fluid can leave the respective exit surface 09.

The outlet direction L is preferably parallel to a main direction, which is preferably defined by at least one side wall of the feed device 13, which is more preferably defined by the at least one delimiting element 16. The outlet direction L preferably has at least one component in the z-direction, with the component in the z-direction preferably facing the transport path. For example, the outlet direction L includes at least one component in the z-direction and at least one component in the x-direction, the component in the z-direction being greater than the component in the x-direction.

The outlet direction L is preferably a direction within a plane, which is displaced to the position of the positioning gap 07, for example along the y-direction, by the z-direction and at least one direction of a shortest boundary, which is in is spanned in a plane in the x-direction and y-direction, the respective exit surface 09 of the relevant print head 08, which preferably delimits the positioning gap 07.

In a preferred embodiment, the extent of the at least one feed device 13 in the y direction is identical to the extent of the respective positioning gap 07 in the y direction. More preferably, the at least one feed device 13 extends in the y-direction by a maximum of 0.5 mm (zero point five millimeters), in particular by a maximum of 0.2 mm (zero point two millimeters). More preferably, the at least one feed device 13 extends in the y-direction by at least 0.05 mm (zero point zero five millimeters), preferably at least 0.1 mm (zero point one millimeter).

The outlet opening 17 is preferably in the plane that runs through the z-direction and at least one direction of the shortest boundary, which is spanned in a plane in the x-direction and y-direction, of the respective exit surface 09 of the print head 08 in question, with the respective exit surface 09 delimits the positioning gap 07, is designed in such a way that the relevant outlet opening 17 has smaller dimensions in the z-direction far from the respective exit surface 09, in particular far from the transport path, than in the z-direction close to the exit surface 09, in particular close to the transport route. The outlet opening 17 preferably points in the plane which is displaced to the position of the positioning gap 07, for example along the y-direction, through the z-direction and at least one direction of the shortest boundary, which is spanned in a plane of the x-direction and y-direction , the respective exit surface 09 of the print head 08 in question, which delimits the positioning gap 07, is spanned into a shape that corresponds, for example, to a two-dimensional longitudinal section of a cone. Additionally or alternatively, the diameter of the outlet opening 17 measured in the direction of the shortest boundary, which is spanned in a plane of the x-direction and y-direction, preferably increases Exit surface 09, which delimits the positioning gap 07, along the z-direction in the direction of the transport path. The at least one outlet opening 17 preferably has a maximum diameter at the point on the feed device 13 which is at the shortest distance from the respective positioning gap 07. More preferably, the maximum diameter of the corresponding outlet opening 17 is greater than the extent of the at least one exit surface 09 of the relevant print head 08, which is arranged on the corresponding positioning gap 07, in the direction of the shortest boundary of the respective exit surface 09.

The delimiting element 16 preferably delimits the respective outlet opening 17 on one side in the y-direction. The respective delimiting element 16 is preferably in direct contact with the respective opening element 43. More preferably, the feed element 14 is in direct contact with the respective opening element 43, so that there is preferably a connection between at least one cavity of the supply element 14 and the respective outlet opening 17. More preferably, the opening element 43 and in particular the respective outlet opening 17 of the corresponding feed device 13 is arranged between the respective delimiting element 16 and the respective feed element 14 .

The supply element 14 preferably comprises the at least one cavity, the cavity being connected to at least one source for supplying the at least one fluid, for example a gas and/or a gas mixture, in particular air, and/or a liquid, and to the outlet opening 17 .

For example, a fluid, for example a gas and/or gas mixture and/or a liquid, can be provided by the at least one source. For example, the at least one fluid, in particular compressed gas, flows through the cavity of the supply element 14 and preferably meets the delimiting element 16 through the recess 17 of the opening element 43. At the delimiting element 16 the fluid, for example the gas and/or the gas mixture and/or the liquid, is deflected in such a way that the fluid preferably exits through the at least one outlet opening 17 from the respective feed device 13 in the outlet direction L. The fluid, for example the gas and/or the gas mixture and/or the liquid, preferably has a pressure of at least 0.1 bar, in particular at least 0.2 bar, and at most 0.7 bar, in particular, on exiting from the feed device 13 of a maximum of 0.5 bar. In 3 an exit of the fluid in the exit direction L is indicated by dashed lines as an example.

The nozzle bar 04 comprises at least one positioning guide 06, which is preferably arranged to be movable, in particular linearly movable. The at least one nozzle bar 04 has the at least one printing position and at least one maintenance position. The respective nozzle bar 04, in particular the respective print heads 08 of the nozzle bar 04, can preferably be and/or can be and/or will be arranged in the at least one printing position and/or at least one idle position and/or at least one maintenance position by means of the respective positioning guide 06. The at least one nozzle bar 04 is arranged either in the printing position or in the at least one maintenance position. The positioning guide 06 is preferably designed as a linear guide. For example, the at least one nozzle bar 04 has at least one positioning guide 06 in front of and behind the nozzle bar 04 in the transverse direction A. The nozzle bar 04 is preferably moved from the printing position to the idle position or to the at least one maintenance position by moving in a direction that has a larger or maximum component in the vertical direction or the z-direction and a smaller or minimum component in the horizontal direction and/or designed to move and/or be movable from the rest position into the printing position or into the at least one maintenance position and/or from the at least one maintenance position into the printing position or into the rest position. Preference is given to the at least one nozzle bar 04, preferably at least two nozzle bars 04, of the printing assembly 01, more preferably at least four nozzle bars 04 of the printing assembly 01, for example simultaneously, by moving in a direction that has a larger or maximum component in the vertical direction or the z-direction and a smaller or minimum component in the horizontal direction, from the printing position in the rest position or into the at least one maintenance position and/or from the rest position into the printing position or into the at least one maintenance position and/or from the at least one maintenance position into the printing position or into the rest position and/or is designed to move. The at least one maintenance position, preferably all maintenance positions, is arranged above the printing position in the vertical direction, preferably in the z-direction. The at least one nozzle bar 04 is preferably moved from the printing position by a movement in the vertical direction and/or in the z-direction and/or upwards into the at least one maintenance position, preferably into all maintenance positions. The at least one nozzle bar 04 is preferably moved from the printing position by a movement in the vertical direction, preferably in the z-direction, more preferably upwards, into the at least one maintenance position, preferably into all maintenance positions. The at least one nozzle bar 04, preferably the at least one nozzle bar 04 of the at least four nozzle bars 04, is arranged in the at least one maintenance position, preferably in all maintenance positions, in the vertical direction and/or in the z-direction above the printing position. The at least one maintenance position, preferably all maintenance positions, is arranged above a level of the transport path, preferably at the position of the transport path that is at the shortest distance from the at least one nozzle bar 04. The at least one nozzle bar 04 is preferably moved with a largest component of its direction of movement in the z direction, preferably in the vertical direction. The at least one maintenance position, preferably all maintenance positions, is preferably at a distance greater than zero from the printing position, preferably in the z-direction. The at least one nozzle bar 04, preferably the at least one nozzle bar 04 of the at least four nozzle bars 04, is positioned either in the printing position or in the at least one maintenance position. Preferably, the at least one Nozzle bar 04 is moved in a direction with a larger vertical component and smaller horizontal component from the printing position to the at least one maintenance position and/or from the at least one maintenance position to the printing position.

The at least one nozzle bar 04, preferably the at least one nozzle bar 04 of the at least four nozzle bars 04, preferably has the at least one idle position. The idle position is preferably a position in which the at least one print head 08 is removed from the printing press and/or the at least one printing unit 01 and/or the at least one nozzle bar 04 and/or placed in the printing press and/or the at least one printing unit 01 and/or or the at least one nozzle bar 04 can be used. At least one print head 08 of the at least one nozzle bar 04 arranged in the rest position can preferably be removed from the at least one printing unit 01. In particular, when the operator is in the rest position, there is preferably more space available to access the at least one print head 08, while in the at least one maintenance position there is preferably only sufficient space to be able to carry out internal, in particular automatic processes within the printing press , for example cleaning at least one exit surface 09 of at least one print head 08. The distance between the at least one print head 08 of the nozzle bar 04 arranged in the at least one idle position and the transport path of printing material 03 is preferably greater than in the printing position and in the at least one maintenance position all maintenance positions. The rest position is preferably arranged above the printing position in the vertical direction, preferably in the z-direction.

The at least one maintenance position is preferably a position in which the at least one print head 08 of the nozzle bar 04 in question can and/or is serviced, for example cleaned and/or aligned, preferably without the corresponding print head 08 being removed from the nozzle bar 04 and/or or the Printing unit 01 and/or the printing press. The respective maintenance position of a nozzle bar 04, in particular of the relevant print heads 08, is preferably characterized in that different nozzle bars 04 arranged in their respective maintenance positions are at different distances from one another than in their respective printing positions and/or in their respective idle positions. The distance of the at least one print head 08, more preferably the respective exit surface 09 of a print head 08 arranged in a maintenance position, from the intended transport path for at least one printing substrate 03 and/or from the at least one printing substrate 03 and/or from the respective nozzle bar is preferred 04 associated printing material guide element 02 greater than in the corresponding printing position. The distance between the at least one print head 08 of the at least one nozzle bar 04 arranged in the at least one maintenance position and the transport path of the printing substrate 03 is preferably greater than in the printing position.

The at least one nozzle bar 04 of the at least four nozzle bars 04 has the at least one printing position and at least one maintenance position. The at least one nozzle bar 04 has at least one maintenance position. The at least one nozzle bar 04 has at least two, more preferably at least three, maintenance positions. The at least one maintenance position is designed as the first maintenance position. At least one second maintenance position is designed as a second maintenance position. At least one third maintenance position is preferably designed as a third maintenance position. The at least two maintenance positions, in particular the first maintenance position and the second maintenance position, are different positions of the at least one nozzle bar 04. A first maintenance position of the at least one nozzle bar 04 is preferably configured as a cleaning position. A second maintenance position of the at least one nozzle bar 04 is preferably designed as an intensive cleaning position. A third maintenance position of the at least one nozzle bar 04 is preferably as Depot position developed. For example, the cleaning position is identical to the intensive cleaning position of the nozzle bar 04. In an exemplary, alternative embodiment, the cleaning position of the nozzle bar 04 differs from its intensive cleaning position.

In the first maintenance position, the cleaning position, the at least one nozzle bar 04 comes into operative connection with at least one cleaning device 18. When it comes into contact with the at least one cleaning device 18, the at least one nozzle bar 04 is arranged in the at least one first maintenance position. The first maintenance position, the cleaning position, corresponds to a positioning of the nozzle bar 04 during contactless cleaning of the at least one exit surface 09 of the at least one print head 08 of the nozzle bar 04 in question. The first maintenance position corresponds to a positioning of the at least one nozzle bar 04 during contactless cleaning of the at least one exit surface 09 of the at least one print head 08 of the at least one nozzle bar 04, preferably cleaning by means of the at least one cleaning device 18. The first maintenance position corresponds to a positioning of the at least one nozzle bar 04 during contactless cleaning of the at least one exit surface 09 of the at least one print head 08 , preferably the at least two print heads 08, more preferably the at least one row of print heads 08, of the at least one nozzle bar 04. The at least one nozzle bar 04 is cleaned during the contactless cleaning of the at least one print head 08, preferably the at least one exit surface 09 of the at least one print head 08, of the at least one nozzle bar 04 is positioned in the first maintenance position. The contact of the at least one print head 08 with the at least one cleaning device 18 preferably corresponds to indirect contact. Additionally or alternatively, the contact of the at least one print head 08 with the at least one cleaning device 18 corresponds to contactless cleaning of the at least one exit surface 09 of the at least one print head 08.

In the second maintenance position, the intensive cleaning position, the at least one nozzle bar 04 comes into operative connection with at least one cleaning device 61, preferably with at least one contact element 64 of the at least one cleaning device 61. The at least one nozzle bar 04 is in contact with the at least one cleaning device 61 the at least one second maintenance position arranged. The second maintenance position, the intensive cleaning position, preferably corresponds to a positioning of the nozzle bar 04 while at least one of the print heads 08 of this nozzle bar 04 is in direct contact with the at least one contact element 64 of the at least one cleaning device 61. The distance between the at least one print head 08 of the nozzle bar 04 arranged in the second maintenance position and the transport path of printing material 03 is preferably greater than in the printing position. The at least one nozzle bar 04 is positioned in the second maintenance position when it comes into contact with the at least one cleaning device 61.

In the third maintenance position, the at least one nozzle bar 04 preferably comes into contact with at least one sealing element 56 and/or with the at least one cleaning device 18, for example preferably if the cleaning device 18 comprises the at least one sealing element 56. The third maintenance position, the depot position, preferably corresponds to a positioning of the at least one nozzle bar 04 in direct contact with the at least one sealing element 56. The at least one sealing element 56 is preferably arranged in direct contact with the at least one nozzle bar 04 in the third maintenance position. The at least one sealing element 56 is preferably the at least one exit surface 09 of the at least one print head 08 of the nozzle bar 04, preferably the at least two exit surfaces 09 of at least two print heads 08 preferably arranged next to one another in the y direction and/or transverse direction A, more preferably at least four exit surfaces 09 of at least four in the y-direction and/or transverse direction A print heads 08 arranged next to one another, more preferably of all print heads 08 arranged next to one another in the y-direction and/or transverse direction A, preferably at least partially sealed against external influences, preferably when the nozzle bar 04 is in the depot position.

In the foregoing and in the following, an operative connection preferably describes that a first element is at least indirectly or directly connected to a second element and/or is designed to act together with the second element. For example, an operative connection should also be understood to mean that the first element is designed to act depending on the design and/or arrangement and/or a movement and/or a process of the second element.

The distance between the at least one print head 08 of the nozzle bar 04 arranged in the at least one maintenance position, preferably in all maintenance positions, and a transport path for printing substrate 03 is preferably greater than in the printing position. In the first maintenance position, the cleaning position, the at least one nozzle bar 04 is at a first distance from the transport path. In the second maintenance position, the intensive cleaning position, the at least one nozzle bar 04 is at a second distance from the transport path, which distance differs from the first distance. The distance from the second maintenance position of the nozzle bar 04, in particular the at least one exit surface 09 of the at least one print head 08 of the nozzle bar 04, to the transport path is less than in the first maintenance position. In the third maintenance position, the depot position, the at least one nozzle bar 04 preferably has a third distance from the transport path that is preferably different from the first distance. For example, the third distance, i.e. the distance from the nozzle bar 04 arranged in the depot position, to the transport path is less than the first distance, i.e. the distance from the nozzle bar 04 arranged in the cleaning position. The third distance of the at least one nozzle bar 04 is preferably in the third maintenance position to that Transport path of printing substrate 03 is a distance that differs from the first distance of the at least one nozzle bar 04 in the first maintenance position. The third distance is preferably less than the first distance. The third distance of the at least one print head 08 of the nozzle bar 04 arranged in the at least one third maintenance position from the transport path of printing substrate 03 is preferably greater than in the printing position.

The cleaning direction G is preferably a horizontal direction G in which a cleaning unit 26 and/or at least one cleaning element 31 and/or at least one removal unit 63 is arranged to be movable and/or is designed to move, in particular for carrying out a cleaning step. The cleaning device 18 preferably comprises the at least one cleaning unit 26 and the at least one cleaning element 31. The cleaning device 61 comprises the at least one removal unit 63. The cleaning direction G preferably has at least one component that runs parallel to the transverse direction A and/or parallel to the y -Direction is arranged and is preferably oriented opposite to the y-direction. More preferably, the cleaning direction G is arranged parallel to the transverse direction A and/or parallel to the y-direction and is preferably oriented opposite to the y-direction. The cleaning direction G is preferably oriented orthogonally to at least the transport direction T provided for transporting at least one printing substrate 03 and/or orthogonally to the x-direction. The cleaning direction G is preferably the direction in which an element cleaning the at least one print head 08 passes this at least one print head 08. The cleaning direction G preferably corresponds to a direction of the longest side of the at least one nozzle bar 04.

The at least one cleaning unit 26 and more preferably at least one cleaning element 31 is preferably arranged such that it can move and/or move in and/or counter to the cleaning direction G. The at least one cleaning unit is preferred 26 and more preferably the at least one cleaning element 31 is arranged so that it can move at least in the cleaning direction G during a cleaning process of the at least one exit surface 09 of the at least one print head 08. Preferably additionally or alternatively, the at least one removal unit 63 is arranged to be movable and/or moving in and/or counter to the cleaning direction G, in particular during a cleaning process of the at least one exit surface 09 of the at least one print head 08.

The at least one printing assembly 01 comprises the at least one cleaning device 18. The at least one cleaning device 18 comprises at least one cleaning element 31 with at least one fluid supply 38 embodied as a fluid supply opening 38. Additionally or alternatively, the at least one cleaning device 18 with the at least one print head 08 is at least over at least a cleaning fluid is ejected through the at least one fluid supply opening 38 at least temporarily in indirect contact. Additionally or alternatively, the at least one cleaning device 18 is designed to come into indirect contact with the at least one print head 08 via at least one cleaning fluid ejected through the at least one fluid supply opening 38, i.e. designed to clean it without contact, and/or comes into indirect contact. The at least one cleaning device 18 preferably comes into indirect contact with the at least one print head 08 via at least one cleaning fluid ejected through the at least one fluid supply opening 38. The indirect contact of the at least one cleaning device 18 with the at least one print head 08 and/or with the at least one nozzle bar 04 thus describes the fact that the at least one cleaning device 18, preferably the at least one cleaning element 31, at least for the duration of the cleaning, preferably permanently , to the at least one exit surface 09 has a distance greater than zero. The at least one cleaning device 18, preferably the at least one cleaning element 31, is the at least one print head 08 of the at least one nozzle bar 04, preferably at least the at least one Exit surface 09, formed contactless cleaning in the indirect contact. The at least one cleaning device 18 is designed to clean the at least one print head 08, preferably the at least one exit surface 09 of the at least one print head 08, more preferably at least two exit surfaces 09 of at least two print heads 08, more preferably at least the exit surfaces 09 of all print heads 08 in a row . Printing unit 01 preferably has at least four cleaning devices 18. Preferably, one cleaning device 18 is configured to clean and/or cleans one nozzle bar 04, preferably the at least four nozzle bars 04, in each case.

The at least one cleaning device 18 has at least one guide system 19. The at least one guide system 19 comprises at least one guide element 53. The at least one cleaning device 18 is designed to move and/or be movable along the at least one guide element 53 and/or is moved, preferably in particular in a straight line. The at least one cleaning device 18 is preferably arranged such that it can be moved and/or moved linearly via the at least one guide system 19, preferably by means of at least one cleaning drive 21.

The at least one guide element 53 of the at least one guide system 19 is preferably designed as a beam and/or rod and/or rail and/or linear guide. At least one guide element 53 of the at least one guide system 19 is preferably arranged in front of and at least one guide element 53 of the at least one guide system 19 after the at least one nozzle bar 04 in transverse direction A and/or in the y direction. For example, at least one guide element 53 of the at least one guide system 19 is arranged on a housing of the at least one printing assembly 01 in the transverse direction A before and after the at least one nozzle bar 04.

The at least one guide element 53 of the at least one guide system 19 preferably has its longitudinal direction along its longest extent. The longitudinal direction of the at least one guide element 53 is preferably arranged in the plane spanned by the x-direction and the z-direction. For example, the longitudinal direction of the at least one guide element 53 is arranged in a plane whose normal vector corresponds to the transverse direction A and/or the y-direction. The longitudinal direction of the at least one guide element 53 preferably has at least a first component in the x-direction, preferably a horizontal component, and at least a second component in the z-direction, preferably a vertical component. The component of the longitudinal direction in the x-direction is preferably greater than the component of the longitudinal direction in the z-direction. The longitudinal direction of the at least one guide element 53 of the at least one guide system 19 thus preferably has a larger horizontal component than its vertical component.

The at least one guide element 53 preferably has at least one guide path. The guide path is preferably designed to guide the at least one cleaning device 18 . The at least one cleaning device 18 is preferably moved along the guide path of the at least one guide element 53. The guide path along the at least one guide element 53 is preferably parallel to the longitudinal direction of the at least one guide element 53. The guide path along the at least one guide element 53 is preferably arranged in a plane whose normal vector corresponds to the transverse direction A and/or the y-direction. The guide path along the at least one guide element 53 within the plane preferably has a larger horizontal component than its vertical component. The at least one cleaning device 18 is preferably moved along the at least one guide element 53 along the guide path in a plane with a larger horizontal component than a vertical component.

Preferably, the at least one guide system 19 has at least one crossbar 54, preferably embodied as a fastening 54. The traverse 54 is preferably designed as a mechanical carrier. The at least one cleaning device 18 is preferably connected to the at least one traverse 54, preferably in a form-fitting manner. The at least one cleaning device 18 and the at least one traverse 54 are preferably designed to move and/or move together along the at least one guide element 53 of the at least one guide system 19, in particular moving linearly or in a straight line. The at least one cleaning device 18 is preferably connected to the at least one guide element 53 of the at least one guide system 19 via the at least one crossbar 54, preferably embodied as a fastening 54, of the at least one guide system 19. The at least one cleaning device 18 is preferably located in front of the at least one nozzle bar 04 via at least one first cross member 54 in transverse direction A and/or in the y direction and via at least one second cross member 54 in transverse direction A and/or in the y direction after the at least one Nozzle bar 04 is connected to the at least one guide element 53. At least one guide element 53 is preferably arranged in front of the at least one nozzle bar 04 in transverse direction A and at least one guide element 53 is arranged in transverse direction A after it.

The distance between the at least one cleaning device 18 and the at least one guide element 53 of the at least one guide system 19 is preferably constant and/or is and/or is defined by the at least one crossbar 54 of the at least one guide system 19. Preferably, the at least one first maintenance position, the cleaning position, and/or the at least one third maintenance position, the depot position, of the at least one nozzle bar 04 is defined and/or based on the preferably constant distance between the at least one cleaning device 18 and the at least one guide element 53 constant distance tuned.

The at least one printing assembly 01 preferably has at least two, more preferably at least four, cleaning devices 18. At least two nozzle bars 04, preferably at least two nozzle bars 04 of the at least four nozzle bars 04, are preferably designed and/or come into contact with at least one cleaning device 18 each, preferably with at least one cleaning device 18 of the at least two cleaning devices 18. A printing unit 01 preferably comprises at least one cleaning device 18 per nozzle bar 04. At least two cleaning devices 18 preferably have at least one common guide system 19. In particular, at least two cleaning devices 18 are preferably connected to the at least one, preferably common, guide system 19 and/or designed to be movable and/or moving by the at least one, preferably common, guide system 19 and/or are moved. The at least two cleaning devices 18 preferably have at least one common guide element 53, in particular a guide element 53 designed as a rail. The at least one common guide system 19 for the at least two cleaning devices 18 preferably has the at least one common guide element 53, preferably at least one common guide element 53 in transverse direction A before and/or at least one common guide element 53 in transverse direction A after the at least one nozzle bar 04 . Preferably, the at least two cleaning devices 18 are connected to the at least one crossbar 54 and/or the at least two cleaning devices 18 and the at least one crossbar 54 are configured to move and/or move together, in particular linearly, along the at least one guide element 53 of the at least one guide system 19 proceeding. The at least two cleaning devices 18 are preferably connected together with the at least one guidance system 19 and/or are designed to be movable and/or movable together by the at least one guidance system 19 from the at least one use position to the at least one storage position or vice versa and/or are moved. The at least two cleaning devices 18 are preferably jointly connected to the at least one guidance system 19 and/or the at least two cleaning devices 18 preferably have the at least one storage position or the at least one use position at the same time.

The at least two cleaning devices 18 preferably have at least two common guide systems 19. At least one of the at least two guide systems 19 is preferably located in front of the at least one nozzle bar 04 in transverse direction A and/or in the y direction, and/or at least one of the at least two guide systems 19 is preferably located in transverse direction A and/or in the y direction arranged after the at least one nozzle bar 04.

The at least two cleaning devices 18 preferably have an angle of inclination with respect to the z-direction, which corresponds to an inclination with respect to the z-direction of the nozzle bar 04 and/or the at least one print head 08 of the nozzle bar 04. The inclination preferably corresponds to the inclination of the associated nozzle bar 04 and/or its print head 08. The at least two cleaning devices 18, which have the at least one common guide element 53, preferably have an angle of inclination with respect to the z-direction which corresponds to an inclination with respect to the z-direction of nozzle bar 04 and/or the at least one print head 08 of nozzle bar 04. For example, the at least two cleaning devices 18, which have the at least one common guide element 53, have a different angle of inclination with respect to the z-direction. For example, the inclination of the at least two cleaning devices 18 to one another is at an angle of at least 1° (one degree), preferably at least 3° (three degrees), more preferably 4° (four degrees). The angle of inclination with respect to the z-direction of the respective cleaning device 18 preferably corresponds to an inclination with respect to the z-direction of the nozzle bar 04 and/or the print heads 08, which nozzle bar 04 or print heads 08 these Cleaning device 18 is assigned.

The at least one cleaning device 18 has at least one storage position and at least one use position. The at least one cleaning device 18 has the at least one storage position.

The at least one storage position of the at least one cleaning device 18 is a position in which the at least one cleaning device 18 is located outside the area between the at least one nozzle bar 04 and the transport path of the at least one printing material 03, for example defined by the at least one printing material guide element 02 located opposite the nozzle bar 04 , is arranged. The at least one storage position is located outside the area between the at least one nozzle bar 04 and the transport path of the at least one printing substrate 03. In particular, the storage position of the at least one cleaning device 18 corresponds to a storage position when the printing press is in an operating state in which the at least one cleaning device 18 is not used.

In the at least one storage position, the at least one cleaning device 18 is arranged in front of or behind the at least one nozzle bar 04 along the x-direction. In its storage position, the at least one cleaning device 18 is preferably and/or is located in a circumferential direction of the at least one printing material guide element 02 that is opposite and/or assigned to the at least one nozzle bar 04 and/or along the transport path of printing material 03 before or after the at least one nozzle bar 04 arranged. Preferably, the at least one cleaning device 18 is and/or is arranged in the at least one storage position along the transport direction T of printing substrate 03 before or after the at least one nozzle bar 04, with the transport direction T at the position of the transport path of printing substrate 03 below the at least one Nozzle bar 04 is determined and / or is. Preferably, the at least one cleaning device 18 is and/or is arranged in the at least one storage position along the transport direction T of printing substrate 03 before or after an area between the at least one nozzle bar 04 and the transport path of printing substrate 03, with the transport direction T at the position of the transport path for printing substrate 03 below the at least one nozzle bar 04 is and/or is determined. The storage position preferably corresponds to a position along the at least one guide element 53 of the at least one guide system 19, in particular along its longitudinal direction, outside the area between the at least one nozzle bar 04 and the transport path of the printing substrate 03. The arrangement preferably corresponds to before or after the at least one nozzle bar 04 of an arrangement before or after the area, which is a spatial area and which is defined by outer edges of the at least one nozzle bar 04 that preferably extend in the z direction, i.e. preferably vertically, with the outer edges being projected up to the transport path. The outer edges preferably correspond to the outward-facing sides of a housing of the at least one nozzle bar 04, which are preferably perpendicular to the plane of the x-direction and the y-direction. In the storage position, the at least one cleaning device 18 is preferably arranged at a distance greater than zero in the x-direction from the outer edges of the at least one nozzle bar 04. The at least one fluid supply opening 38 of the at least one cleaning element 31 of the at least one cleaning device 18 arranged in the storage position, preferably at least one area centroid of a boundary of the fluid supply opening 38, preferably has a first point facing the at least one opening of the at least one exit surface 09 of the at least one print head 08 preferably at a relative distance and/or is arranged at the relative distance, preferably a distance in the x-direction and/or in the transport direction T. The preferably relative distance of the at least one fluid supply opening 38 of the at least one cleaning element 31 is preferably the at least one in the storage position arranged cleaning device 18, preferably des centroid of the boundary of the fluid supply opening 38 to the at least one opening of the at least one exit surface 09 of the at least one print head 08 at least twice, preferably at least two point five times, more preferably at least three times, more preferably at least five times, as large as an extension of the at least one Cleaning device 18 in the transport direction T. The transport direction T is preferably determined at the position of the transport path with the shortest distance to the at least one exit surface 09 of the at least one print head 08 of the at least one nozzle bar 04 to be cleaned by the at least one cleaning device 18. The relative distance in the storage position is preferably at least large enough to prevent the at least one nozzle bar 04 from coming into contact with the at least one cleaning device 18 when it is arranged in the printing position. The arrangement of the storage position preferably enables a compact design of the at least one printing unit 01. The at least one cleaning device 18 is preferably easy to handle. Maintenance of the at least one cleaning device 18 and/or removal of the at least one cleaning device 18 is preferably carried out in the storage position.

The at least one cleaning device 18 has the at least one position of use.

The at least one position of use of the at least one cleaning device 18 is preferably a position in which the at least one cleaning device 18 is located within the area between the at least one nozzle bar 04 and the transport path of the at least one printing substrate 03, for example defined by the at least one printing substrate guide element opposite the nozzle bar 04 02, is arranged. The at least one usage position is preferably located within the area between the at least one nozzle bar 04 and the transport path of the at least one printing substrate 03. At least one Cleaning device 18 is preferably located in the at least one position of use within the area between the at least one nozzle bar 04 and the transport path for printing substrate 03. In particular, the usage position of the at least one cleaning device 18 corresponds to a position when the printing press is in an operating state in which the at least one cleaning device 18 is used. The position of use of the at least one cleaning device 18 preferably corresponds to a position in which the cleaning device 18 is in direct or indirect contact with at least one, in particular one, print head 08 of the relevant nozzle bar 04 that is to be cleaned, and/or preferably a position in which the cleaning device 18 is used to perform the cleaning of the at least one print head 08 of the relevant nozzle bar 04. In the use position, the at least one cleaning device 18 is preferably at least partially in the area between the at least one nozzle bar 04 and the transport path, in particular between the shortest connection of the at least one nozzle bar 04 to the transport path, with the transport path being connected, for example, through the at least one nozzle bar 04 associated printing material guide element 02 is arranged. The at least one fluid supply opening 38 of the at least one cleaning element 31 of the at least one cleaning device 18 arranged in the usage position, preferably the centroid of the area of the boundary of the fluid supply opening 38, preferably faces the at least one opening of the at least one exit surface 09 of the at least one print head 08, preferably a second one relative distance and/or is arranged in the relative distance, preferably a distance in the x-direction and/or in the transport direction T. The preferably relative distance of the at least one fluid supply opening 38 of the at least one cleaning element 31 of the at least one cleaning device 18 is preferred of the centroid of the boundary of the fluid supply opening 38 to the at least one opening of the at least one exit surface 09 of the at least one print head 08 is larger in the storage position than in the use position. is preferred the preferably relative distance of the at least one fluid supply opening 38 of the at least one cleaning element 31 of the at least one cleaning device 18 arranged in the usage position, preferably the centroid of the area of the boundary of the fluid supply opening 38, to the at least one opening of the at least one exit surface 09 of the at least one print head 08 at most once , preferably a maximum of zero point five, as large as the extent of the at least one cleaning device 18 in the transport direction T. The transport direction T is preferably at the position of the transport path with the shortest distance to the at least one exit surface 09 of the at least one print head 08 of the at least a nozzle bar 04 to be cleaned by the at least one cleaning device 18.

The at least one cleaning device 18 is preferably arranged in the at least one position of use within the area between the at least one nozzle bar 04 and the transport path of the at least one printing substrate 03. Additionally or alternatively, the at least one cleaning device 18 is arranged in the at least one storage position along the x-direction before or after the at least one nozzle bar 04.

Preferably, the design of the storage position and/or the design of the use position increases the compactness of the printing machine. A lateral displacement, for example in the y-direction, of the at least one nozzle bar from the printing position into the at least one maintenance position is preferably superfluous.

The area between the at least one nozzle bar 04 and the transport path of the printing substrate 03 preferably describes above and below the spatial area that encompasses the shortest distance between the nozzle bar 04, in particular the at least one print head 08 of the nozzle bar 04, and the transport path. The area between the at least one is preferred Nozzle bar 04 and the transport path of printing substrate 03, above and below, the spatial region which is the shortest distance between the nozzle bar 04, in particular the at least one print head 08 of the nozzle bar 04, more preferably the at least one exit surface 09 of the at least one print head 08 of the at least one Nozzle bar 04, and having the transport path. The shortest distance of the area between the at least one nozzle bar 04 and the transport path of the printing material 03 is preferably directed in the z-direction, preferably vertically. The spatial region, i.e. preferably the region between the at least one nozzle bar 04 and the transport path of printing substrate 03, is preferably delimited by outer edges of the at least one nozzle bar 04, which preferably extend in the z-direction, i.e. preferably vertically, with the outer edges being projected as far as the transport path become. The outer edges preferably correspond to the outward-facing sides of a housing of the at least one nozzle bar 04, which are preferably perpendicular to the plane of the x-direction and the y-direction. The at least one nozzle bar 04 is preferably delimited in the transport direction T of printing substrate 03, preferably leading and trailing, by a respective boundary plane, preferably by a boundary plane of at least two boundary planes, with the direction of transport T preferably being at the point on the transport path with the shortest distance to the at least one exit surface 09 of the at least one print head 08 of the at least one nozzle bar 04. The at least one delimitation plane, preferably at least two delimitation planes, is preferably perpendicular to a plane, with the at least one exit surface 09 being arranged in the plane. The at least two boundary planes are preferably perpendicular to the plane that has the at least one exit surface 09, preferably the at least one exit surface 09 of the at least one print head 08 of the at least one nozzle bar 04 of the at least four nozzle bars 04. Preferably, one delimitation plane of the at least two delimitation planes delimits the at least one nozzle bar 04 leading in the transport direction T and one Boundary plane of the at least two boundary planes following the at least one nozzle bar 04 in transport direction T. The area between the at least one nozzle bar 04 and the transport path for printing substrate 03 preferably describes a spatial area within the at least two boundary planes. The at least one cleaning device 18 or the at least one cleaning system 61 is preferably configured to actively connect to the at least one nozzle bar 04 within the area between the at least one nozzle bar 04 and the transport path of printing substrate 03, for example configured to clean it. Preferably, an element that is located within the area between the at least one nozzle bar 04 and the transport path for printing substrate 03 is actively connected to the at least one nozzle bar 04.

For example, the at least one print head 08 of a nozzle bar 04 arranged in the first maintenance position, the cleaning position, is assigned a cleaning device 18, which is positioned in the use position via the at least one guide system 19. The at least one cleaning device 18 is preferably configured to be movable and/or moving, in particular as a whole, at least orthogonally to the transverse direction A, preferably via the at least one guide system 19. In the at least one first maintenance position of the at least one nozzle bar 04, at least one exit surface 09 of at least one print head 08, in particular one exit surface 09 of at least two, preferably at least three and more preferably at least four print heads 08, is preferably in the use position arranged cleaning device 18 assigned and / or assigned and / or arranged opposite.

The at least one cleaning device 18 can be transferred and/or moved by the at least one guide system 19 along the at least one guide element 53 from the storage position to the use position or vice versa educated. The at least one cleaning device 18 is preferably configured to move along the at least one guide element 53, preferably in a straight line or linearly. The at least one cleaning device 18 is designed to move and/or move and/or is moved along the at least one guide element 53 of the at least one guide system 19 from the at least one storage position to the at least one use position or vice versa. The at least one storage position and the at least one use position are arranged along the at least one guide element 53. The at least one storage position and the at least one use position are preferably spaced apart from one another by a distance greater than zero.

In the first or third maintenance position, the cleaning position or the depot position, of the at least one nozzle bar 04, the cleaning device 18 assigned to and/or arranged opposite the corresponding nozzle bar 04 is preferably embodied as at least one locking element, for example in the form of at least one maintenance stop. In its first or third maintenance position, the nozzle bar 04 having the at least one print head 08 is preferably pulled and/or pressed against the at least one cleaning device 18 by the application of a force and/or, for example, by gravity. As a result, the first or third maintenance position of the at least one nozzle bar 04 is preferably clearly defined.

The at least one nozzle bar 04 is preferably arranged in the first maintenance position, the cleaning position, when the at least one cleaning device 18 is arranged in the at least one use position and when at least one cleaning element 31 is arranged in a use position. The at least one nozzle bar 04 is preferably arranged in the third maintenance position, the depot position, when the at least one cleaning device 18 is arranged in the at least one use position and when the at least one cleaning element 31 is in a storage position is arranged. Preferably alternatively, the at least one nozzle bar 04 is arranged in the rest position when the at least one cleaning device 18 is arranged in the at least one use position and when the at least one cleaning element 31 is arranged in the storage position.

The at least one cleaning device 18 has at least one cleaning unit 26, in particular the at least one cleaning element 31. The at least one cleaning device 18 preferably has at least one traverse 22 embodied preferably as a collecting trough 22 . Preferably, the traverse 22 is a mechanical support.

The at least one collecting trough 22 preferably has its longitudinal direction along its longest extension. The longitudinal direction of the at least one drip tray 22 is preferably aligned parallel to the at least one nozzle bar 04. The drip tray 22 preferably has its longest extent in the y-direction. The at least one drip tray 22 preferably extends over the entire extent of the at least one nozzle bar 04 in transverse direction A. The at least one drip tray 22 is preferably in transverse direction A before and after the at least one nozzle bar 04 with the at least one crossbar 54 of the at least one guidance system 19 connected and/or attached thereto. The at least one collecting tray 22 is preferably designed as a collection container for liquid or dirt. The at least one collecting tray 22 preferably has at least one U-profile.

The at least one cleaning unit 26 and preferably the at least one cleaning element 31 is designed to move and/or move along the longitudinal direction of the at least one collecting tray 22, preferably along a cleaning guide 44. Preferably, the at least one cleaning unit 26 and preferably the at least one cleaning element 31 is designed to move and/or move in or counter to the transverse direction A and/or the y-direction.

For example, particularly if the at least one nozzle bar 04 comprises at least two rows of print heads 08, preferably arranged next to one another in the y direction, at least two cleaning elements 31, preferably exactly as many cleaning elements 31 as there are rows of print heads 08, are assigned to the at least one collecting tray 22 and /or arranged on or in the at least one drip pan 22.

The at least one cleaning element 31 preferably has the at least one storage position.

The at least one storage position of the at least one cleaning element 31 is preferably a position of the at least one cleaning element 31 when the latter is not actively connected to the at least one nozzle bar 04. The at least one storage position of the at least one cleaning element 31 preferably corresponds to a storage position when the printing press is in an operating state in which the at least one cleaning element 31 is not used.

Preferably, the at least one cleaning element 31 is and/or is arranged in the at least one storage position outside the area between the at least one nozzle bar 04 and the transport path of the printing material 03, for example determined by the at least one printing material guide element 02 located opposite the nozzle bar 04. The at least one cleaning element 31 is preferably in the at least one storage position, preferably along the y-direction and/or along the transverse direction A and/or along the longest edge of the at least one nozzle bar 04, outside the area between the at least one nozzle bar 04 and the Transport path of the printing material 03 arranged. The at least one cleaning element 31 is preferably in the at least one Storage position, preferably along the y-direction and/or along the transverse direction A and/or along the longest side of the at least one nozzle bar 04, is and/or is being arranged outside of the area between the at least one nozzle bar 04 and the transport path of the printing substrate 03. The storage position of the at least one cleaning element 31 preferably corresponds to a position along the at least one collecting tray 22, in particular along its longitudinal direction, outside the area between the at least one nozzle bar 04 and the transport path of the printing substrate 03. The at least one fluid supply opening 38 of the at least one in the cleaning element 31 arranged in the storage position, preferably the at least one cleaning device 18 arranged in the use position, more preferably the centroid of the area of the boundary of the fluid supply opening 38, to the at least one opening of the at least one exit surface 09 of the at least one print head 08 a preferably third preferably relative distance on and /or is arranged at the relative distance, preferably a distance in the y-direction and/or in the transverse direction A. The preferably relative distance of the at least one fluid supply opening 38 of the at least one cleaning element 31 arranged in the storage position, preferably the centroid of the area of the boundary of the Fluid supply opening 38, to the at least one opening of the at least one exit surface 09 of the at least one print head 08, at least twice, preferably at least two point five times, more preferably at least three times, more preferably at least five times, as large as an extent in transverse direction A of the at least one exit surface 09 of the at least one print head 08 of the at least one nozzle bar 04 to be cleaned by the at least one cleaning device 18. Preferably, the relative distance to a first print head 08 of the at least one row of print heads 08 of the at least one nozzle bar 04 is determined, which print head 08 is in the supply position on is arranged next.

The at least one cleaning element 31 is preferably along the y-direction and/or designed to be movable and/or moving along the transverse direction A from the area between the at least one nozzle bar 04 and the transport path of the printing substrate 03, in order to reach the at least one storage position. The at least one cleaning element 31 is preferably at a standstill in the at least one storage position.

The at least one cleaning element 31 has at least one use position. The at least one cleaning device 18 is preferably arranged in its position of use when the at least one cleaning element 31 is arranged in its position of use.

The at least one cleaning element 31 is arranged in the at least one operating position when the printing press is in at least one cleaning operating state, in particular when the at least one cleaning element 31 is designed to clean the at least one nozzle bar 04. The at least one operating position of the at least one cleaning element 31 is a position within the area between the at least one nozzle bar 04 and the transport path of the printing substrate 03, determined for example by the at least one printing substrate guide element 02 located opposite the nozzle bar 04. The operating position preferably corresponds to a position along the at least a collecting tray 22, in particular along its longitudinal direction, within the area between the at least one nozzle bar 04 and the transport path of the printing material 03. The at least one print head 08, preferably the at least one exit surface 09 of the at least one print head 08, of the at least one nozzle bar 04, preferably of the at least one nozzle bar 04 of the at least four nozzle bars 04 is cleaned without contact by the at least one cleaning device 18. The at least one print head 08, preferably the at least one exit surface 09 of the at least one print head 08, the at least one nozzle bar 04, preferably the at least one nozzle bar 04 of the at least four nozzle bars 04, is formed by the at least a cleaning device 18 with the at least one cleaning element 31 arranged in the operating position and having the at least one fluid supply opening 38 is cleaned without contact. In the operating position, the at least one cleaning element 31 is arranged within the area between the at least one nozzle bar 04 and the transport path for printing substrate 03. Preferably, the at least one fluid supply opening 38 of the at least one cleaning element 31 arranged in the use position, preferably of the at least one cleaning device 18 arranged in the use position, more preferably the center of gravity of the boundary of the fluid supply opening 38, faces the at least one opening of the at least one exit surface 09 of the at least a print head 08 is preferably a fourth preferred relative distance and/or is arranged in the relative distance, preferably a distance in the y-direction and/or in the transverse direction A. The preferably relative distance of the at least one fluid supply opening 38 of the at least one in the cleaning element 31, preferably the centroid of the area of the boundary of the fluid supply opening 38, to the at least one opening of the at least one exit surface 09 of the at least one print head 08 a maximum of once, preferably a maximum of zero point five times, as large as an extension in the transverse direction A of the at least one Exit surface 09 of the at least one print head 08 of the at least one nozzle bar 04 to be cleaned by the at least one cleaning device 18. The relative distance in the use position is preferably smaller than in the storage position.

The at least one cleaning element 31 is preferably designed to be movable and/or movable along the y-direction and/or along the transverse direction A in the area between the at least one nozzle bar 04 and the transport path of the printing substrate 03, in order to reach the at least one operating position . In the at least one operating position, the at least one cleaning element 31 is preferably in motion with respect to the cleaning direction G.

The at least one cleaning element 31 is preferably arranged in the at least one operating position when it is in operative connection with the at least one nozzle bar 04. The at least one cleaning device 18 preferably comes into operative connection at least temporarily with the at least one nozzle bar 04, preferably when the at least one nozzle bar 04 is in the first maintenance position, the cleaning position, and the at least one cleaning element 31 is in the operating position. The at least one cleaning device 18, in particular at least two, preferably all, of the cleaning elements 31 of the cleaning device 18 that are arranged in the operating position preferably comes into operative connection with at least two, preferably all, of the nozzle bars 04, which nozzle bars 04 are preferably arranged in the first maintenance position at the same time . Additional nozzle bars 04 of the printing unit 01, which should not be in operative connection with the at least one cleaning device 18, are preferred, while preferably at least one nozzle bar 04 is in operative connection with the at least one cleaning element 31 of the at least one cleaning device 18, preferably in the idle position at this point in time or the depot position.

The at least one cleaning device 18 has the at least one storage position and the at least one use position. The at least one cleaning device 18 is moved by the at least one guide system 19 from the at least one storage position into the at least one use position or vice versa. The at least one cleaning device 18, preferably the at least two cleaning devices 18, is moved along the at least one guide element 53 from the at least one storage position, in particular the storage position located outside the area between the at least one nozzle bar 04 and the transport path of the at least one printing substrate 03, into the at least one position of use, in particular a position of use located within the area between the at least one nozzle bar 04 and the transport path of at least one printing substrate 03, or vice versa and/or movable. The at least one cleaning device 18 is moved, preferably linearly, along the at least one guide element 53 of the at least one guide system 19 from the at least one storage position to the at least one use position or vice versa, preferably along a direction along the shortest side of the at least one nozzle bar 04. The at least one cleaning device 18 preferably comprises at least one drive. The at least one drive of the at least one cleaning device 18 is preferably designed to drive the movement of the at least one cleaning device 18 from the storage position into the use position or vice versa.

The at least one cleaning element 31 preferably has the at least one storage position and the at least one use position. The at least one cleaning element 31 is preferably moved from the at least one storage position into the at least one use position or vice versa. The at least one cleaning element 31 is preferably moved in its at least one operating position in the area between the at least one nozzle bar 04 and the transport path of the at least one printing substrate 03 in or counter to the cleaning direction G.

The at least one cleaning device 18 cleans the at least one print head 08. The at least one cleaning device 18 preferably cleans the at least one print head 08 at least from time to time. In the first maintenance position, the at least one print head 08 is cleaned by the at least one cleaning device 18, in particular by the at least one cleaning element 31, cleaned.

The at least one printing assembly 01 of the printing press comprises at least one cleaning device 61. The at least one cleaning device 61 comprises at least one removal unit 63. The at least one removal unit 63 comprises at least one contact element 64. At least one removal unit 63 is preferably located in a nozzle bar 04 of the at least one printing assembly 01 assigned and/or is at least temporarily in operative connection with at least one nozzle bar 04. The at least one cleaning device 61 is designed to come into direct contact with the at least one print head 08 at least at times via the at least one contact element 64. The at least one cleaning device 61 is designed to come into direct contact with the at least one print head 08 at least via the at least one contact element 64 and/or comes into direct contact. More preferably, the at least one cleaning device 61 comprises at least two removal units 63. One removal unit 63 is preferably designed to come into contact with at least one row of print heads 08 and/or preferably all removal units 63 come into contact with one row of print heads 08 at the same time educated. One removal unit 63 preferably comes into contact with at least one row of print heads 08 and/or all removal units 63 preferably come into contact with one row of print heads 08 at the same time. The at least one cleaning device 61 preferably comes into direct contact with the at least one print head 08 at least via the at least one contact element 64. The at least one printing unit 01 preferably has the at least one cleaning system 61 with at least two removal units 63. Preferably, at least two nozzle bars 04, preferably at least two nozzle bars 04 of the at least four nozzle bars 04, are designed and/or come into contact with at least one removal unit 63 each.

The at least one cleaning device 61 has at least one guide element 62. The at least one cleaning device 61 preferably comprises at least two guide elements 62, more preferably exactly two guide elements 62. The at least one removal unit 63 can be moved along the at least one guide element 62 along the longest edge of the at least one nozzle bar 04 and/or along the y-direction and / or designed to be movable. The at least one removal unit 63 is along the at least one guide element 62 along the longest side of the at least one nozzle bar 04 and/or designed to move and/or move along the y-direction and/or is moved. The at least one removal unit 63 is preferably arranged along the at least one guide element 62 along a longest side of the at least one nozzle bar 04 and/or along the y-direction in at least one storage position or in at least one use position. The storage position and the use position are preferably spaced apart from one another by a distance greater than zero. The at least one guide element 62 is preferably designed as a beam and/or rod and/or rail and/or linear guide. A longest extent of the at least one guide element 62 preferably extends, preferably its longitudinal direction, in the y-direction and/or in the transverse direction A, i.e. parallel to a longest extent of the at least one nozzle bar 04. The at least one guide element 62 preferably enables fast and reliable Guiding the at least one removal unit 63. The risk of at least one removal unit 63 tilting and, for example, damaging the at least one exit surface as a result is preferably minimized.

In the x-direction, i.e. preferably along the transport path of printing substrate 03, at least one of the guide elements 62 is preferably arranged in front of and at least one of the guide elements 62 is arranged behind the at least one nozzle bar 04. At least one guide element 62, preferably exactly one guide element 62, is preferably arranged in the x-direction, i.e. preferably along the transport path of the printing substrate 03, in front of a first nozzle bar 04 of the printing unit 01 and after a last nozzle bar 04 of the printing unit 01. For example, if the at least one printing material guide element 02 opposite the at least one nozzle bar 04 is designed as a cylinder or roller, at least one of the guide elements 62 is along the circumference of the at least one printing material guide element 02 in front of the at least one nozzle bar 04 and along at least one of the guide elements 62 the extent of at least one Printing material guide element 02 is arranged after the at least one nozzle bar 04.

The at least one removal unit 63 is preferably configured to move and/or move linearly along the at least one guide element 62 of the at least one cleaning device 61. The at least one removal unit 63 is preferably designed to move and/or move and/or is moved along the at least one guide element 62 in or counter to at least one direction, in particular the cleaning direction G and/or the transverse direction A and/or the y-direction. The at least one removal unit 63 is preferably designed to move and/or move and/or is moved along the at least one guide element 62 from the at least one storage position into the at least one use position or vice versa.

The at least one guide element 62 is preferably designed to guide and/or move the at least one removal unit 63 in or counter to the cleaning direction G. Preferably, if the at least one removal unit 63 is arranged on at least one carrier 76 or is connected to the at least one carrier 76, the at least one guide element 62 is designed to guide and/or move the at least one carrier 76 in or counter to the cleaning direction G.

The at least one removal unit 63, more preferably the at least one contact element 64, preferably has the at least one storage position.

The at least one storage position of the at least one removal unit 63 is preferably a position of the at least one removal unit 63 when it is not actively connected to the at least one nozzle bar 04. The at least one storage position of the at least one removal unit 63 preferably corresponds to a storage position of the at least one removal unit 63 when the printing press is in an operating state in which the at least one Removal unit 63 is not used.

The at least one removal unit 63 is preferably located and/or will be located in the at least one storage position outside of an area between the at least one nozzle bar 04 and the transport path of the printing substrate 03, for example defined by the at least one printing substrate guide element 02 located opposite the nozzle bar 04.

In a preferred embodiment, shown for example in Figures 10 to 12a , the at least one removal unit 63 is in the at least one storage position, preferably along the y-direction and/or along the transverse direction A, preferably along the longest side of the at least one nozzle bar 04, outside the area between the at least one nozzle bar 04 and the transport path of the printing material 03 is and/or is being arranged. The at least one removal unit 63 is preferably arranged in the at least one storage position along a longest edge of the at least one nozzle bar 04 and/or along the y-direction outside the area between the at least one nozzle bar 04 and the transport path of the printing substrate 03. The at least one removal unit 63 is preferably and/or is arranged in the at least one storage position along the longest side of the at least one nozzle bar 04 and/or along the y-direction outside of the area between the at least one nozzle bar 04 and the transport path of the printing substrate 03 . The supply position preferably corresponds to a position along the at least one guide element 62, in particular along its longitudinal direction, outside the area between the at least one nozzle bar 04 and the transport path of the printing material 03. The at least one removal unit 63 is preferably along the y-direction and/or along in the transverse direction A from the area between the at least one nozzle bar 04 and the transport path of the printing substrate 03 and/or moving in order to reach the at least one storage position.

The at least one contact element 64 of the at least one removal unit 63 arranged in the storage position, more preferably at least one contact area, is preferably at a preferably fifth relative distance from the at least one opening of the at least one exit surface 09 of the at least one print head 08 and/or is in arranged according to the relative distance, preferably a distance in the y-direction and/or in the transverse direction A. The preferably relative distance of the at least one contact element 64 of the at least one removal unit 63 arranged in the storage position, more preferably of the at least one contact region, to the at least an opening in the at least one exit surface 09 of the at least one print head 08 at least twice, preferably at least two point five times, more preferably at least three times, more preferably at least five times, as large as an extension in transverse direction A of the at least one exit surface 09 of the at least one print head 08 of the at least one nozzle bar 04 to be cleaned by the at least one removal unit 63. Preferably, the relative distance to a first print head 08 of the at least one row of print heads 08 of the at least one nozzle bar 04 is determined, which print head 08 is located closest to the supply position.

For example in an alternative embodiment, for example shown in Figures 15 to 17c , the supply position of the at least one removal unit 63 is preferably arranged in the x-direction, i.e. preferably along the transport path of the printing substrate 03, before or after the at least one nozzle bar 04 of the printing unit 01. For this purpose, the at least one cleaning device 61 preferably comprises at least one pivoting element 81, preferably at least two pivoting elements 81, which forms a pivot axis of the at least one removal unit 63 and/or of the at least one guide element 62. The at least one removal unit 63 and/or the at least one guide element 62 is preferably designed to pivot about the at least one pivot element 81. The at least one removal unit 63 is preferably removed by pivoting about the at least one pivoting element 81 of transferred from the stock position to the use position.

The at least one removal unit 63 is preferably at a standstill in the at least one storage position.

Preferably, particularly when the at least one removal unit 63 is arranged on the at least one carrier 76 and/or is connected to the at least one carrier 76, the at least one carrier 76 has the at least one storage position and/or is in the at least one storage position at least temporarily arranged and/or arrangeable.

The at least one removal unit 63, more preferably the at least one contact element 64, has the at least one use position. For example, the at least one distance unit is 63 in Figure 12b arranged in the at least one use position. The at least one removal unit 63, more preferably the at least one contact element 64, preferably has the at least one storage position and the at least one use position.

Preferably, in particular when the at least one removal unit 63 is arranged on the at least one carrier 76 and/or is connected to the at least one carrier 76, the at least one carrier 76 has the at least one usage position and/or is in the at least one usage position at least temporarily arranged and/or arrangeable. At least two removal units 63 are preferably arranged together on the at least one carrier 76. In particular, the at least one carrier 76 then preferably has the at least one storage position and the at least one use position.

The at least one removal unit 63 is preferably in at least one cleaning operating state of the printing press, in particular when the at least one Removal unit 63 is designed to clean the at least one nozzle bar 04, is arranged in the at least one use position. The at least one usage position of the at least one removal unit 63 is a position within the area between the at least one nozzle bar 04 and the transport path of the printing substrate 03, determined for example by the at least one printing substrate guide element 02 located opposite the nozzle bar 04. The usage position corresponds to a position along the at least one Guide element 62, in particular along its longitudinal direction, within the area between the at least one nozzle bar 04 and the transport path of the printing material 03. In the at least one operating position, the at least one removal unit 63 is preferably moving at least temporarily with respect to the cleaning direction G. The at least one Contact element 64 of the at least one removal unit 63 arranged in the use position, more preferably the at least one contact region, is preferably a sixth relative distance from the at least one opening of the at least one exit surface 09 of the at least one print head 08 and/or is arranged at the relative distance , preferably a distance in the y-direction and/or in the transverse direction A. The preferably relative distance of the at least one contact element 64 of the at least one removal unit 63 arranged in the operating position, more preferably of the at least one contact area, to the at least one opening of the at least an exit surface 09 of the at least one print head 08 no more than once, preferably a maximum of zero point five times, as large as an extension in the transverse direction A of the at least one exit surface 09 of the at least one print head 08 of the at least one nozzle bar 04 to be cleaned by the at least one removal unit 63. The relative distance in the use position is preferably less than in the storage position.

In the preferred embodiment, for example shown in Figures 10 to 12b , the at least one distance unit 63 is preferably along the y-direction and/or designed to be movable and/or moving along the transverse direction A, preferably along the longest side of the at least one nozzle bar 04, in the area between the at least one nozzle bar 04 and the transport path of the printing substrate 03, in order to reach the at least one operating position.

In the alternative embodiment, shown for example in Figures 15 to 17c , the at least one removal unit 63 is preferably moved around the at least one pivoting element 81 from the storage position, i.e. an area outside the area between the at least one nozzle bar 04 and the transport path of the printing substrate 03, into the area between the at least one nozzle bar 04 and the transport path of the printing substrate Printing material 03 is designed to pivot in order to reach the at least one operating position.

The at least one removal unit 63 is arranged in the at least one use position when it is in operative connection with the at least one nozzle bar 04. The at least one cleaning device 61 is at least temporarily operatively connected to the at least one nozzle bar 04 when the at least one nozzle bar 04 is in the second maintenance position, the intensive cleaning position, and the at least one removal unit 63 is in the operating position. The at least one cleaning device 61, in particular at least two removal units 63 of the cleaning device 61 arranged in the operating position, preferably comes into operative connection with at least two, preferably all, nozzle bars 04, which nozzle bars 04 are preferably arranged in the second maintenance position at the same time. Additional nozzle bars 04 of the printing assembly 01, which should not be in operative connection with the at least one cleaning device 61, while preferably at least one nozzle bar 04 is in operative connection with the at least one cleaning device 61, are preferably arranged in the idle position at this point in time.

The at least one cleaning device 61 is designed to clean at least one print head 08 of the at least one nozzle bar 04 arranged in the second maintenance position by at least intermittent direct contact. The at least one print head 08, preferably its at least one exit surface 09 and/or its at least one contact surface 11 and/or the at least one positioning gap 07, of the at least one nozzle bar 04 arranged in the second maintenance position, the intensive cleaning position, is in direct contact at least at times at least one component of the cleaning device 61 arranged in the position of use, in particular to the at least one contact element 64 of the at least one removal unit 63 arranged in the position of use.

The at least one removal unit 63 preferably has the at least one storage position and the at least one use position. The at least one removal unit 63 is designed to move and/or be movable along the at least one guide element 62 of the at least one cleaning device 61. The at least one removal unit 63 is preferably configured to move and/or move along the at least one guide element 62 in or counter to the at least one cleaning direction G, preferably in or counter to the y direction and/or preferably in or counter to the transverse direction A and/or is moved. The at least one cleaning device 61 preferably has at least one drive. The at least one drive of the at least one cleaning device 61 is preferably configured to drive the movement of the at least one removal unit 63, in particular along the at least one guide element 62.

The at least one removal unit 63 is preferably moved from the at least one storage position to the at least one use position or vice versa. The at least one removal unit 63 is preferably configured to move and/or move along the at least one guide element 62, preferably in the cleaning direction G and/or the y direction, of the at least one cleaning device 61. while the at least one nozzle bar 04 is arranged in the at least one maintenance position. The at least one removal unit 63 is preferably located along the at least one guide element 62 from the at least one storage position located outside the area between the at least one nozzle bar 04 and the transport path of the printing substrate 03 to the at least one storage position located inside the area between the at least one nozzle bar 04 and the transport path of the printing substrate 03 or vice versa. In particular, the at least one nozzle bar 04 is at a standstill.

The at least one cleaning device 61 cleans the at least one print head 08 at least from time to time. In the second maintenance position, the at least one print head 08 is cleaned by the at least one cleaning device 61, in particular by the at least one removal unit 63. In the at least one use position, the at least one removal unit 63 is preferably configured to move and/or move in or opposite to the cleaning direction G, preferably in or opposite to the y-direction, preferably along the at least one guide element 62, for example driven by the at least one drive cleaning device 61. In a cleaning step, the at least one removal unit 63 is preferably moved in the at least one use position in or counter to the cleaning direction G, preferably in or counter to the y direction, preferably along the at least one guide element 62. The at least one print head 08 of the at least one nozzle bar 04, preferably of the at least one nozzle bar 04 of the at least four nozzle bars 04, is cleaned by the at least one cleaning device 61 with the at least one removal unit 63 arranged in the at least one operating position with the at least one wiping cloth 64 Contact element 64 cleaned. The at least one removal unit 63 is arranged in the at least one operating position within the area between the at least one nozzle bar 04 and the transport path for printing substrate 03.

More preferably, the at least one nozzle bar 04 comprises the at least two print heads 08. The at least two print heads 08 are preferably arranged in at least two rows that are different from one another. The at least one cleaning device 61 preferably cleans the at least two rows of print heads 08 of the at least one nozzle bar 04 at the same time.

The at least one printing unit 01 comprises the at least one cleaning device 18. The at least one cleaning device 18 is designed to clean the at least one exit surface 09 and/or the at least one contact surface 11 of the at least one print head 08 of the at least one nozzle bar 04. The at least one cleaning device 18 preferably additionally or alternatively cleans the at least one positioning gap 07. Each nozzle bar 04 of a printing assembly 01 is preferably assigned at least one cleaning device 18.

Figure 5a shows an example of a corresponding cleaning device 18 in the position of use, which is preferably assigned to a nozzle bar 04 in the first maintenance position. For the sake of clarity, only four print heads 08 of the relevant nozzle bar 04 are shown.

The at least one cleaning device 18 preferably comprises at least one cleaning guide 44 and/or the at least one cleaning drive 21 and/or the at least one collecting tray 22 and/or at least one support device 23; 24 and/or at least one cleaning unit 26, preferably at least one cleaning unit 26, per row of print heads 08 in the y-direction of the nozzle bar 04 in question.

The at least one support device 23; 24 is preferably designed as at least one positioning aid 23 and/or as at least one cleaning aid 24.

In a preferred embodiment, the at least one cleaning device 18 comprises at least two cleaning elements 31. As a result, the at least one cleaning device 18 is preferably designed to clean at least two print heads 08, in particular a large number of print heads 08, of the at least one nozzle bar 04, in particular simultaneously. For example, the at least two print heads 08 in different rows, preferably in at least two rows, are cleaned by print heads 08 of the at least one nozzle bar 04, preferably at the same time.

The at least one cleaning device 18 preferably has an extent in the transverse direction A that is at least as large as the working width of the at least one nozzle bar 04 in the transverse direction A. As a result, the at least two print heads 08, preferably all of the exit surfaces 09 of all of the print heads 08 , more preferably in addition to or as an alternative to the exit surfaces 09, the contact surfaces 11 of the print heads 08 of the at least one nozzle bar 04 are cleaned in one process. The at least one cleaning device 18 preferably has an extent in the transport direction T of the printing substrate 03 that is at least as large as the extent of the surface of the at least one print head 08 of the at least one nozzle bar 04 in the transport direction T. The at least one cleaning device preferably has 18 in transport direction T of printing substrate 03 has an extent that is at least as large as the extent of a projection of the surface of the at least one print head 08 of the at least one nozzle bar 04 in the plane of exit surface 09 in transport direction T. More preferably, at least the at least one cleaning element 31 extends in the direction of transport T of printing substrate 03 that is at least as large as the extent of a projection of the surface of the at least one print head 08 of the at least one nozzle bar 04 in the plane of the exit surface 09 in the direction of transport T. The extent of the at least one cleaning device 18 in the transport direction T is preferably at least greater than the extent of at least two rows of print heads 08 of the at least one nozzle bar 04 in transport direction T. The at least one cleaning device 18 thus preferably encloses the at least two rows of print heads 08 of the nozzle bar 04 located in the first or third maintenance position, at least temporarily.

The at least one cleaning unit 26 is preferably arranged such that it can be moved and/or moved along the cleaning guide 44, for example by means of the cleaning drive 21. More preferably, the at least one cleaning unit 26 is arranged and/or is moved such that it can move in and/or counter to a cleaning direction G, in particular along the cleaning guide 44 . The at least one collecting tray 22 is preferably arranged at least partially surrounding the at least one cleaning unit 26 . The collecting tray 22 is more preferably arranged such that the collecting tray 22 at least partially encloses the cleaning unit 26 and the at least one print head 08 of the nozzle bar 04 in question, which is arranged in the first maintenance position or third maintenance position.

The at least one cleaning unit 26 preferably comprises at least one mounting element 28, preferably at least two mounting elements 28, and/or at least one power element 29 and/or at least one carrier 27 and/or the at least one cleaning element 31. The at least one mounting element 28 is preferred at least two mounting elements 28 and/or the at least one force element 29 and/or the at least one carrier 27 and/or the at least one cleaning element 31 within the corresponding cleaning unit 26, preferably firmly connected to one another.

The at least one mounting element 28, in particular the at least two mounting elements 28, are preferably in direct contact with the at least one force element 29. The at least one force element 29 is embodied, for example, as a bellows and/or hollow body and/or spring and is preferred in terms of its expansion and/or dimensions adjustable in the z-direction, preferably in a direction whose main component corresponds to the z-direction. The at least one carrier 27 is preferably embodied as a base body and/or preferably carries the at least one assembly element 28, preferably at least two assembly elements 28, and/or the at least one force element 29 and/or the at least one cleaning element 31 of the corresponding cleaning unit 26 the at least one cleaning element 31 is arranged in direct contact with at least one mounting element 28, preferably at least two mounting elements 28. The extent and/or dimensions of cleaning unit 26 in the z-direction, more preferably in a direction whose main component corresponds to the z-direction, can preferably be adjusted by changing the extent and/or dimensions of the at least one force element 29 of the cleaning unit 26 in question /or changeable and/or movable. This mobility means that the at least one cleaning element 31 can preferably be brought into contact with other components and/or removed from contact, with the at least one print head 08 and/or the at least one support device 23; 24 come into question.

In a preferred embodiment, the at least one cleaning unit 26 comprises the at least one cleaning element 31, which is connected to the at least one carrier 27 via the at least one force element 29, preferably via at least four force elements 29, for example via exactly four force elements 29. The at least one force element 29, in particular the at least four force elements 29, is preferably designed as a spring. The at least one cleaning element 31 is preferably mounted and/or fixed in the at least one carrier 27, which is preferably designed as a base body, by the at least one force element 29, preferably in a floating manner. This preferably enables precise and simple setting of the contact pressure which the associated nozzle bar 04 exerts on the at least one cleaning element 31, in particular when it is being lowered into the maintenance position and/or while it is being arranged in the maintenance position at least one sliding point 32 of the cleaning element 31 exerts.

The cleaning device 18 preferably has at least one positioning aid 23 that is different from each print head 08, which preferably has at least one contact surface that is oriented in the same direction as the at least one contact surface 11 and/or exit surface 09 of the at least one print head 08 the at least one contact surface of the positioning aid 23, preferably adjacent to or spaced apart from the at least one contact surface 11 of a relevant print head 08 with respect to the cleaning direction G. More preferably, the contact surface of the positioning aid 23 in the z-direction has an identical component to the exit surface 09 of one with the corresponding cleaning element 31 to be cleaned. In particular, if there is direct contact between the at least one cleaning element 31 and the exit surface 09 of a print head 08 of the relevant nozzle bar 04, the contact surface of the positioning aid 23 is oriented in the same direction as the at least one exit surface 09 If, for example, there is direct contact between the at least one cleaning element 31 and the exit surface 09 of a print head 08 of the relevant nozzle bar 04, then the cleaning element 31 is preferably embodied as a contact element, for example as a wiper. In particular, if there is only indirect contact between the at least one cleaning element 31 and the exit surface 09 of a print head 08 of the relevant nozzle bar 04, the contact surface of the positioning aid 23 is oriented in the same direction as the at least one contact surface 11, in particular the at least one spacer surface 11 The at least one positioning aid 23 is preferably arranged in such a way that the at least one cleaning element 31 is arranged so that it can be clearly positioned relative to at least one print head 08, in particular that is to be cleaned.

The cleaning device 18 preferably comprises at least one cleaning aid 24. The cleaning aid 24 is preferably designed in such a way that the at least one Cleaning element 31 can be cleaned. The cleaning aid 24 preferably has at least one spray device and/or at least one wiping device.

The at least one cleaning element 31 is preferably embodied as a cleaning head 31. The cleaning element 31 is preferably firmly connected to the at least one mounting element 28 and/or the at least one carrier 27 of the cleaning device 18 in question, in particular the cleaning unit 26 in question. The at least one cleaning element 31 is preferably arranged such that it can be moved in and/or counter to the cleaning direction G.

The cleaning head 31 preferably has at least one fluid supply 38 and at least one fluid discharge opening 39; 41 on. The at least one fluid supply 38 is more preferably designed as at least one fluid supply 38 for supplying cleaning liquid. The at least one fluid discharge opening 39; 41 is more preferred than at least one fluid discharge opening 39; 41 designed for cleaning liquid and / or dirt. More preferably, the cleaning head 31 has at least two fluid discharge openings 39; 41, wherein a first fluid discharge opening 39 is preferably designed as a fluid discharge 39 and/or wherein a second fluid discharge opening 41 is preferably designed as a fluid suction device 41. The at least one first fluid discharge opening 39 preferably at least partially, more preferably completely, surrounds the at least one fluid supply 38 in one plane.

If, for example, the cleaning head 31 is in direct or indirect contact with the at least one print head 08, the at least one fluid supply 38 is, for example, at least one cleaning fluid, in particular a cleaning agent, in the immediate vicinity of the exit surface 09 of the at least one print head 08 and/or one positioning gap 07 and the at least one fluid discharge opening 39; 41 also in the immediate vicinity of the exit surface 09 of the at least one print head 08 and/or a positioning gap 07 Cleaning fluid trained again sucking. For this purpose, the cleaning head 31 is preferably brought so close to the at least one print head 08 that a cleaning gap is formed between the cleaning head 31 on the one hand and the exit surface 09 of the print head 08 on the other hand, through which the fluid, in particular the cleaning liquid, flows and thus the exit surface 09 of the at least one print head 08 and/or a positioning gap 07 is cleaned and/or is possible to clean.

The at least one cleaning head 31 preferably has at least one sliding point 32 provided in particular for contact with the at least one print head 08, with the sliding point 32 preferably being embodied as a sliding surface 32. The at least one sliding point 32 is preferably designed for at least partial contact with at least part of at least one contact surface 11 of the at least one print head 08, which is more preferably designed as at least one spacer surface 11.

The at least one cleaning head 31 preferably has at least one ramp 33; 34 on. More preferably, the cleaning head 31 has at least one first ramp 33 and at least one second ramp 34 . This preferably makes it easier to position the at least one cleaning element 31 on the at least one print head 08 and/or to move the at least one cleaning element 31 along the at least one nozzle bar 04, for example during a cleaning process. The at least one cleaning element 31 can preferably be arranged in at least one first position and/or in at least one second position, the first position of the cleaning element 31 being arranged at a distance from the second position of the cleaning element 31, preferably along the cleaning direction G. For example, the first ramp 33 and/or the second ramp 34 is designed as an inclined surface.

The first ramp 33 is preferably designed as an entry ramp 33 . Preferably, the first ramp 33 is the distance between a reference point of the first ramp 33 and the print head 08 to be cleaned. The reference point of the first ramp 33 is preferably a point on the first ramp 33 which is arranged perpendicular to the print head 08 to be cleaned. In the first position of the cleaning element 31, the first ramp 33 is preferably at a first distance from a print head 08 to be cleaned, preferably from at least one exit surface 09 and/or spacing surface 11 to be cleaned, at the reference point of the first ramp 33. In the second position of the cleaning element 31, the first ramp 33 is preferably at a second distance from a print head 08 to be cleaned, preferably from at least one exit surface 09 and/or spacer surface 11 to be cleaned, at the reference point of the first ramp 33, the second distance between the reference point of the first ramp 33 and the print head 08 to be cleaned is less than the first distance between the reference point of the first ramp 33 and the print head 08 to be cleaned.

The second ramp 34 is preferably designed as an outlet ramp 34 . The second ramp 34 is preferably arranged to increase the distance between a reference point of the second ramp 34 and the print head 08 to be cleaned. The reference point of the second ramp 34 is preferably a point of the second ramp 34 which is arranged perpendicular to the print head 08 to be cleaned. In the first position of the cleaning element 31, the second ramp 34 is preferably at a first distance from a print head 08, in particular one to be cleaned, preferably from at least one exit surface 09 and/or spacing surface 11 to be cleaned, at the reference point of the second ramp 34. In the second position of the cleaning element 31, the second ramp 34 is preferably at a second distance from a print head 08, in particular one that is to be cleaned, preferably from at least one exit surface 09 and/or spacing surface 11 to be cleaned, at the reference point of the second ramp 34, whereby the second distance between the reference point of the second ramp 34 and print head 08, in particular to be cleaned, is greater than the first distance between the reference point of the second ramp 34 and print head 08, in particular to be cleaned.

Alternatively or additionally, the at least one print head 08 and/or the at least one cleaning head 31 has at least one guide device 36. This guide device 36 is preferably designed as a guide surface 36 whose surface normal has at least one component that is orthogonal to the z-direction and to the cleaning direction G. The at least one guide surface 36 of a cleaning head 31 preferably borders directly on at least one sliding surface 32 of the respective cleaning head 31. The at least one guide device 36 is preferably arranged in such a way that the cleaning head 31 can be positioned within a tolerance range or in an exact position with respect to a direction oriented parallel to the x-direction and/or orthogonal to the cleaning direction G and orthogonal to the z-direction and/or is positioned.

The cleaning head 31 has at least one cleaning area 37 . The at least one cleaning area 37 has the at least one fluid supply 38 embodied as a fluid supply opening 38 . The at least one cleaning area 37 preferably has the at least one fluid supply 38 and the at least one fluid discharge opening 39; 41 on. The cleaning area 37 more preferably has the at least one fluid inlet 38 and/or the at least one fluid outlet 39 and/or the at least one fluid suction 41. The at least one fluid discharge opening 39; 41 each connected to at least one sink for removing cleaning agents and/or dirt and/or particles, for example. The at least one fluid supply 38 is preferably connected to a source of cleaning agent. The fluid supply 38 is formed within the cleaning area 37 as the fluid supply opening 38 . The at least one cleaning area 37 is preferably arranged between the at least one first ramp 33 and the at least one second ramp 34 . In particular, the at least one first ramp 33 is arranged in front of the at least one cleaning area 37 in the cleaning direction G. The at least one second ramp 34 is preferably arranged after the at least one cleaning area 37 in the cleaning direction G. Preferably, the first ramp 33 rises from an outer edge of the cleaning element 31 towards the at least one cleaning area 37. The second ramp 33 preferably rises from an outer edge of the cleaning element 31 towards the at least one cleaning region 37 . The gradients of the first ramp 33 and the second ramp 34 are preferably directed in opposite directions to one another.

The fluid supply opening 38 preferably has at least one delimitation of the fluid supply opening 38 in a plane of the surface of the cleaning region 37, preferably orthogonal to the z-direction, with a centroid. More preferably, the delimitation of the fluid supply opening 38 has at least one first delimitation point, which is arranged in alignment with the centroid with respect to the cleaning direction G. The delimitation of the fluid supply opening 38 preferably has at least one second delimitation point, which is arranged in alignment with the centroid with respect to a direction orthogonal to the cleaning direction G. The delimitation of the fluid supply opening 38 preferably has at least one third delimitation point, which is arranged on the delimitation of the fluid supply opening 38 in extension of a distance from the first delimitation point to the centroid of the area. The delimitation of the fluid supply opening 38 preferably has at least a fourth delimitation point, which is arranged on the delimitation of the fluid supply opening 38 in extension of a distance from the second delimitation point to the centroid of the area. The respective first delimitation point and the second delimitation point and the third delimitation point and the fourth delimitation point are preferably positioned at a distance greater than zero from one another on the delimitation of the fluid supply opening 38 . The distance between the first boundary point and the third boundary point on the boundary of the fluid supply opening 38 is preferably less than the distance between the second boundary point and the fourth boundary point on the boundary of the fluid supply opening 38. A longitudinal direction of the fluid supply opening 38 is preferably at least partially orthogonal to a straight line between the first delimitation point and the center of gravity of the delimitation of the fluid supply opening 38. For example in In other words, the at least one fluid supply opening 38, in particular the delimitation of the fluid supply opening 38, preferably has the longitudinal direction of the fluid supply opening 38 and a transverse direction in the plane spanned by the x-direction and the y-direction and/or orthogonally to the z-direction of the fluid supply port 38. The expansion of the fluid supply opening 38 in its longitudinal direction and in its transverse direction is preferably different from one another. The fluid supply opening 38, in particular the delimitation of the fluid supply opening 38, preferably has a maximum extension in its longitudinal direction. The extent of the fluid supply opening 38, in particular the delimitation of the fluid supply opening 38, is preferably smaller in the transverse direction of the fluid supply opening 38 than in its longitudinal direction.

In an exemplary embodiment, a cleaning area 37 has at least two fluid supply openings 38 each with a delimitation of the respective fluid supply opening 38 in a plane of the surface of the cleaning area 37 . The at least two fluid supply openings 38 each have a centroid, with the centroids of the fluid supply openings 38 preferably being arranged on a straight line. The straight line of the at least two centroids of the fluid supply openings 38 is preferably at least partially arranged orthogonally to the cleaning direction G and orthogonally to the z-direction.

A tangential through the first boundary point of the boundary of the fluid supply opening 38 is preferably arranged at least partially orthogonally to the cleaning direction G and orthogonally to the z-direction. Preferably, the tangential through the first boundary point of the boundary of the fluid supply opening 38 to the cleaning direction G in a positive mathematical sense of rotation, i.e. counterclockwise, has a planar angle of at least 50°, preferably at least 60°, and at most 130°. preferably of at most 120°. The tangent through the first boundary point of the boundary of the fluid supply opening 38 is preferably parallel to a plane which corresponds to the position of the positioning gap 07, for example along the y-direction, displaced by the z-direction and at least one direction of the shortest boundary of a respective exit surface 09, which is spanned in a plane in the x-direction and y-direction, of the print head 08 to be cleaned of the relevant nozzle bar 04 , which delimits the positioning gap 07, is spanned.

The tangential through the first boundary point of the boundary of the fluid supply opening 38 is preferably parallel to a longitudinal direction of the fluid supply opening 38, in particular in the case of a fluid supply opening 38 which is, for example, elongated and/or oval and/or slot-shaped and/or as a groove and/or in another shape is designed as circular. More preferably, the longitudinal direction of the fluid supply opening 38 is aligned parallel to at least one positioning gap 07 of the associated nozzle bar 04. The longitudinal direction of the fluid supply opening 38 is preferably located in a plane spanned by the x-direction and the y-direction. The fluid supply opening 38 is preferably designed as a groove and/or oblong and/or oval and/or slot-shaped, preferably in the plane orthogonal to the z-direction. A groove preferably has at least two mutually parallel longitudinal sides. Preferably, the longitudinal direction of the fluid supply opening 38 points to the cleaning direction G in a positive mathematical sense of rotation, i.e. rotated counterclockwise, at a preferably flat angle, in particular an opening angle 47, of at least 50°, preferably of at least 60°, and of at most 130° , preferably of at most 120°. In other words, this means, for example, that the longitudinal direction of the at least one fluid supply opening 38 has an identical inclination to the longitudinal direction of the at least one positioning gap 07, preferably by the opening angle 47 with respect to the cleaning direction G. In particular, opening angle 47 preferably corresponds to the at least partial oblique overlap in the x-direction of the at least two print heads 08 arranged next to one another, in particular adjacent to one another. This shows, for example, that opening angle 47 is preferably acute-angled or obtuse. This acute angle or an obtuse design of the opening angle 47 preferably depicts the at least partially oblique overlap in the x-direction of the at least two print heads 08 arranged next to one another and/or the alignment of the longitudinal direction of the at least one positioning gap 07.

In a preferred embodiment, the fluid supply opening 38 is aligned parallel to at least one positioning gap 07 of the associated nozzle bar 04. More preferably, the fluid supply opening 38 is preferably aligned parallel to the at least one positioning gap 07 between at least two print heads 08, which in particular are to be cleaned, preferably within a row in the y-direction of a nozzle bar 04. More preferably, the tangential through the first boundary point of the boundary of the fluid supply opening 38 is aligned parallel to at least one positioning gap 07 of the associated nozzle bar 04. This enables, for example, optimal penetration of cleaning agents into the positioning gap 07.

The fluid discharge 39 is preferably arranged at least partially around the fluid supply opening 38 in at least one plane. More preferably, the fluid discharge 39 is arranged completely around the fluid supply opening 38 in at least one plane. Said plane is preferably spanned by the x-direction and the y-direction. Preferably, the fluid discharge 39 is designed so that cleaning agents and/or dirt and/or particles, for example, which adhere and/or are residues on the respective exit surface 09 and/or the respective contact surface 11 of a print head 08 in question, can be removed and/or removed.

The fluid discharge 39 preferably has at least one delimitation of the fluid discharge 39 in a plane of the surface of the cleaning area 37, preferably orthogonal to the z-direction, with a centroid. More preferably, the delimitation of the fluid discharge 39 has at least one fifth delimitation point, which is arranged in alignment with the cleaning direction G with the center of gravity of the boundary of the fluid discharge 39 . The delimitation of the fluid discharge 39 preferably has at least one sixth delimitation point, which is arranged in alignment with the centroid with respect to a direction orthogonal to the cleaning direction G. The delimitation of the fluid discharge 39 preferably has at least one seventh delimitation point, which is arranged on the delimitation of the fluid discharge 39 in extension of a distance from the fifth delimitation point to the centroid of the area. The delimitation of the fluid discharge 39 preferably has at least one eighth delimitation point, which is arranged on the delimitation of the fluid discharge 39 in extension of a distance from the sixth delimitation point to the centroid of the area. The respective fifth delimitation point and the sixth delimitation point and the seventh delimitation point and the eighth delimitation point are preferably positioned at a distance greater than zero from one another on the delimitation of the fluid discharge 39 . The distance between the fifth boundary point and the seventh boundary point on the boundary of fluid drainage 39 is preferably less than the distance between the sixth boundary point and the eighth boundary point on the boundary of fluid drainage 39. A longitudinal direction of fluid drainage 39 is preferably at least partially orthogonal to a straight line between the fifth delimitation point and the center of gravity of the delimitation of fluid drainage 39. In other words, for example, the at least one fluid drainage 39, in particular the delimitation of fluid drainage 39, points in the plane spanned by the x-direction and the y-direction, and/or orthogonally The z-direction preferably has the longitudinal direction of the fluid discharge 39 and a transverse direction of the fluid discharge 39 . The expansion of the fluid discharge 39 in its longitudinal direction and in its transverse direction is preferably different from one another. The fluid discharge 39, in particular the delimitation of the fluid discharge 39, preferably has a maximum extension in its longitudinal direction. The extent of the fluid discharge 39, in particular the boundary of the fluid discharge 39, is preferably smaller in the transverse direction of the fluid discharge 39 than in its direction longitudinal direction.

More preferably, a tangential through the fifth delimitation point of the delimitation of the fluid discharge 39 is at least partially orthogonal to the cleaning direction G and orthogonal to the z-direction and additionally or alternatively parallel to the corresponding tangential through the first delimitation point of the delimitation of the respective fluid supply opening 38. Additionally or alternatively, the fluid discharge 39 is preferably at least partially aligned orthogonally to the cleaning direction G and orthogonally to the z-direction and/or parallel to at least one positioning gap 07 of the associated nozzle bar 04. Preferably, the tangent through the fifth boundary point of the boundary of the fluid discharge 39 is aligned parallel to the at least one positioning gap 07 of the associated nozzle bar 04, in particular in a plane of the surface of the cleaning area 37. Preferably, the tangential through the fifth boundary point of the boundary of the fluid discharge 39, which is at least partially arranged orthogonally to the cleaning direction G and orthogonally to the z-direction, to the cleaning direction G in a positive mathematical sense of rotation, i.e. counterclockwise, at a planar angle of at least 50°, preferably at least 60°, and of at most 130°, preferably of at most 120°.

The tangential through the fifth boundary point of the boundary of fluid discharge 39 is preferably parallel to a longitudinal direction of fluid discharge 39, particularly in the case of a fluid discharge 39 which is, for example, elongated and/or oval and/or slot-shaped and/or as a groove and/or trapezoidal and/or is formed in a shape other than circular. The fluid discharge 39 is preferably in the form of a trapezium and/or a groove and/or a parallelogram, preferably in the plane orthogonal to the z-direction. More preferably, the longitudinal direction of the fluid discharge 39 is aligned parallel to at least one positioning gap 07 of the associated nozzle bar 04. Preferably, the longitudinal direction of the fluid discharge 39 to the Cleaning direction G in a positive mathematical sense of rotation, i.e. rotated counterclockwise, a preferably flat angle, in particular a discharge angle 48, of at least 50°, preferably at least 60°, and at most 130°, preferably at most 120°. In other words, this means, for example, that the longitudinal direction of the at least one fluid discharge 39 has an identical inclination to the longitudinal direction of the at least one positioning gap 07, preferably at the discharge angle 48 with respect to the cleaning direction G. In particular, the discharge angle 48 thus corresponds to the at least partial oblique overlap in the x-direction of the at least two print heads 08 arranged next to one another, in particular adjacent to one another. This shows, for example, that the discharge angle 48 is preferably acute-angled or obtuse. This acute-angled or obtuse design of the discharge angle 48 preferably reflects the at least partially oblique overlap in the x-direction of the at least two print heads 08 arranged next to one another and/or the alignment of the longitudinal direction of the at least one positioning gap 07. This preferably enables optimal suction from the at least one positioning gap 07.

The at least one fluid suction device 41 can be subjected to a strong negative pressure, for example. The fluid suction device 41 is preferably designed to remove at least such cleaning fluid and/or such dirt as is left over after at least one suction device by means of the at least one fluid discharge device 39.

The at least one fluid suction device 41 is preferably designed as a relatively narrow slit. The fluid suction 41 preferably has at least one boundary of the fluid suction 41 in a plane of the surface of the cleaning area 37, preferably orthogonal to the z-direction, with a centroid. More preferably, the delimitation of the fluid suction 41 has at least a ninth delimitation point, which is arranged in alignment with the centroid of the delimitation of the fluid suction 41 with respect to the cleaning direction G. The delimitation of the fluid suction device 41 preferably has at least a tenth delimitation point, which is arranged in alignment with the centroid with respect to a direction orthogonal to the cleaning direction G. The delimitation of the fluid suction 41 preferably has at least an eleventh delimitation point, which is arranged on the delimitation of the fluid suction 41 in extension of a distance from the ninth delimitation point to the centroid. The delimitation of the fluid suction 41 preferably has at least a twelfth delimitation point, which is arranged on the delimitation of the fluid suction 41 in extension of a distance from the tenth delimitation point to the centroid. The ninth delimitation point and the tenth delimitation point and the eleventh delimitation point and the twelfth delimitation point are preferably positioned at a distance greater than zero from one another on the delimitation of the fluid suction device 41 . The distance between the ninth boundary point and the eleventh boundary point on the boundary of fluid suction 41 is preferably less than the distance between the tenth boundary point and the twelfth boundary point on the boundary of fluid suction 41. A longitudinal direction of fluid suction 41 is preferably at least partially orthogonal to a straight line between the ninth boundary point and the focus of the boundary of the fluid suction 41. In other words, for example, the at least one fluid suction 41, in particular the boundary of the fluid suction 41, in the plane spanned by the x-direction and the y-direction, and/or orthogonal to the z-direction, preferably the longitudinal direction of the fluid suction 41 and a transverse direction of the fluid suction 41 . The expansion of the fluid suction device 41 in its longitudinal direction and in its transverse direction is preferably different from one another. The fluid suction 41, in particular the boundary of the fluid suction 41, preferably has a maximum extent in its longitudinal direction. The extent of the fluid suction 41, in particular the boundary of the fluid suction 41, is preferably smaller in the transverse direction of the fluid suction 41 than in its longitudinal direction. This preferably allows optimal suction from the at least one positioning gap 07.

The minimum distance between the ninth boundary point and the eleventh boundary point of fluid suction 41 is preferably less than the minimum distance between the fifth boundary point and the seventh boundary point of fluid drainage 39; the distance is preferably at most half as large, more preferably at most one-fifth as large.

The delimitation of the fluid suction 41 preferably has at least two delimitation points which have the greatest possible distance of all delimitation points of the delimitation of the fluid suction 41 from one another. The greatest possible distance between two boundary points of the boundary of fluid suction 41 preferably has a minimum length of preferably at least 35 mm (thirty-five millimeters), in particular at least 40 mm (forty millimeters), more preferably at least 45 mm (forty-five millimeters), and/or a maximum length of preferably at most 60 mm (sixty millimeters), in particular at most 55 mm (fifty five millimeters), more preferably at most 50 mm (fifty millimeters). More preferably, the greatest possible distance between two boundary points of the boundary of fluid suction 41 has a minimum length that is greater than at least one boundary of an exit surface 09 in question, in particular one that is to be cleaned, of a print head 08 in question in a direction that is parallel to the minimum length of the Fluid suction 41 is oriented. More preferably, the greatest possible distance between two delimitation points of the delimitation of the fluid suction device 41 has a minimum length that is greater than at least one delimitation of an exit surface 09 in question, in particular one that is to be cleaned, of a print head 08 in question in the x-direction. This preferably enables cleaning of the outlet surface 09 in question and additionally or alternatively cleaning of at least one contact surface 11 delimiting the outlet surface 09 in question.

A tangential line through the ninth boundary point of the boundary of the fluid suction device 41 is preferably positioned at least partially orthogonally to the cleaning direction G and orthogonally to the z-direction and alternatively or additionally parallel to the corresponding tangential line through the first boundary point of the boundary of the fluid supply opening 38. Additionally or alternatively, the fluid suction device 41 is preferably positioned at least partially orthogonally to the cleaning direction G and orthogonally to the z-direction and parallel to the positioning gap 07. The tangential line through the ninth boundary point of the boundary of fluid suction 41 is preferably aligned parallel to the at least one positioning gap 07 of the associated nozzle bar 04, in particular in a plane of the surface of cleaning area 37. Preferably, the tangential line through the ninth boundary point of the boundary of fluid suction 41, which is at least partially arranged orthogonally to the cleaning direction G and orthogonally to the z-direction, to the cleaning direction G in a positive mathematical sense of rotation, i.e. counterclockwise, at a planar angle of at least 50°, preferably at least 60°, and of at most 130°, preferably of at most 120°.

The tangential through the ninth boundary point of the boundary of fluid suction 41 is preferably parallel to a longitudinal direction of fluid suction 41. More preferably, the longitudinal direction of fluid suction 41 is aligned parallel to the at least one positioning gap 07 of the associated nozzle bar 04. The longitudinal direction of the fluid suction device 41 preferably points to the cleaning direction G in a positive mathematical direction of rotation, i.e. counterclockwise, at a preferably level angle, in particular a suction angle 49, of at least 50°, preferably of at least 60°, and of at most 130° , preferably of at most 120°. In other words, this means, for example, that the longitudinal direction of the at least one fluid suction device 41 has an identical inclination to the longitudinal direction of the at least one positioning gap 07, preferably around the suction angle 49 with respect to the cleaning direction G. In particular, suction angle 49 preferably corresponds to the at least partial oblique overlap in the x-direction of the at least two print heads 08 arranged next to one another, in particular adjacent to one another. This shows, for example, that suction angle 49 is preferably acute-angled or obtuse. This acute-angled or obtuse design of suction angle 49 preferably reflects the at least partially oblique overlap in the x-direction of the at least two print heads 08 arranged next to one another and/or the alignment of the longitudinal direction of the at least one positioning gap 07.

In a preferred embodiment, the tangential line through the first boundary point of the boundary of the fluid supply opening 38 and/or the tangential line through the fifth boundary point of the boundary of the fluid discharge 39 and/or the tangential line through the ninth boundary point of the boundary of the fluid suction 41 preferably points to the cleaning direction G in a positive mathematical sense of rotation, a planar angle of at least 50°, preferably at least 60°, and at most 130°, preferably at most 120°. More preferably, the longitudinal direction of the fluid supply opening 38 and/or the longitudinal direction of the fluid discharge 39 and/or the longitudinal direction of the fluid suction device 41 has a planar angle of at least 50°, preferably of at least 60°, and of to the cleaning direction G in a positive mathematical direction of rotation at most 130°, preferably at most 120°. The longitudinal direction of the at least one fluid supply opening 38 and/or the longitudinal direction of the at least one fluid discharge 39 and/or the longitudinal direction of the at least one fluid suction device 41 are preferably parallel to the at least one longitudinal direction of the at least one positioning gap 07 between at least two print heads 08 arranged next to one another of the at least one Nozzle bar 04 aligned.

In a preferred exemplary embodiment, the cleaning element 31 in question comprises at least one cleaning area 37, as a result of which at least one print head 08 of at least one nozzle bar 04 can preferably be cleaned and/or cleaned. In an alternative exemplary embodiment, the cleaning element 31 in question preferably comprises at least two cleaning areas 37. The at least two cleaning areas 37 in question can preferably be and/or are connected by at least one connecting element 42. Thus, by means of the one cleaning head 31 in question, which comprises at least two connectable and/or connected cleaning areas 37, preferably at least two print heads 08 can be cleaned and/or cleaned, with the at least two print heads 08 preferably being located in at least two different rows of print heads 08 are arranged in the y-direction. For example, a cleaning head 31 includes, in addition to or as an alternative to the at least one cleaning area 37, at least one wiper 52, which is arranged, for example, in direct contact with at least one exit surface 09 of a print head 08 to be cleaned.

In a preferred embodiment, the at least one printing unit 01 of the printing press comprises at least one nozzle bar 04 with at least two print heads 08 arranged next to one another, which delimit the at least one positioning gap 07, with at least one feed device 13 assigned to the respective positioning gap 07 and/or at least one of the relevant Cleaning device 18 assigned to print head 08 of nozzle bar 04.

The at least one feed system 13 is used, for example, in an operating state of the printing press, in which case at least one printing substrate 03 can be and/or is being printed with at least one printing fluid. By ejecting at least one fluid, for example a gas and/or a gas mixture, in particular air, and/or a liquid, through the outlet opening 17 of the respective feed device 13, the penetration and/or deposition of For example, pressurized fluid in the respective positioning gap 07 is made more difficult and/or prevented.

The at least one cleaning device 18, preferably the at least one cleaning area 37 of the at least one cleaning device 18, is without contact with the at least one print head 08, more preferably the at least one exit surface 09 and/or the at least one contact surface 11 and/or the at least one positioning gap 07 trained to clean. The at least one cleaning device 18 cleans the at least one print head 08 of the print heads 08 without contact. The at least one print head 08, preferably the at least one exit surface 09 of the at least one print head 08, of the at least one nozzle bar 04 is cleaned without contact by the at least one cleaning device 18 with the at least one cleaning element 31 with the at least one fluid supply opening 38. The at least one cleaning region 37 of the at least one cleaning element 31 is preferably designed to clean the at least one exit surface 09 and/or the at least one contact surface 11 and/or the at least one positioning gap 07 without contact. This means that there is only indirect contact, for example via a cleaning fluid, between the at least one cleaning area 37 and at least one of the components of the at least one print head 08 listed below, preferably the at least one exit surface 09 and/or the at least one contact surface 11 and/or the at least one positioning gap 07. The at least one cleaning area 37, preferably at least the at least one fluid supply opening 38, is preferably connected to the at least one print head 08, preferably at least to the at least one exit surface 09 and/or to the at least one contact surface 11 and/or to the at least one positioning gap 07, preferably permanently spaced at a distance greater than zero. Preferably, the at least one cleaning area 37, preferably at least the at least one fluid supply opening 38, is to the at least one print head 08, preferably at least to the at least one exit surface 09 and/or to the at least one contact surface 11 and/or to the at least one Positioning gap 07, preferably arranged permanently without contact.

In at least one cleaning process, at least the at least one cleaning element 31 and/or the at least one cleaning unit 26 is preferably moved in the cleaning direction G. For example, the relevant cleaning element 31 and/or the relevant cleaning unit 26 has a constant speed along the cleaning direction G. The fluid supply opening 38 preferably ejects cleaning agent which comes into contact with the at least one exit surface 09 and/or the at least one contact surface 11 and/or the at least one positioning gap 07 of the nozzle bar 04 in question. The cleaning agent preferably cleans the at least one exit surface 09 and/or the at least one contact surface 11 and/or the at least one positioning gap 07. The fluid discharge 39 sucks in the cleaning agent and/or dirt, for example, after cleaning the exit surface 09 and/or the Contact surface 11 and/or the positioning gap 07 in a preferably first removal step, preferably by applying negative pressure. In a second removal step, the fluid suction device 41 preferably sucks off the cleaning agent and/or dirt, for example, which has remained and/or adhered to the exit surface 09 and/or the contact surface 11 and/or in the positioning gap 07, for example after the first removal step.

Alternatively or additionally, the speed of the cleaning element 31 and/or the cleaning unit 26 is slowed down and/or stopped in the cleaning direction G, preferably at at least one position, which is assigned to a positioning gap 07, for example, so that the positioning gap 07 in question can be cleaned, for example and/or feasible. During the at least one cleaning process, the at least one feed device 13 preferably pushes a fluid, for example a gas and/or a gas mixture, in particular air, and/or a liquid, through the at least one outlet opening 17 out of. This makes it more difficult and/or prevents the cleaning agent from penetrating and/or depositing in the respective positioning gap 07 during the cleaning process.

Intensive cleaning, for example, of the at least one relevant positioning gap 07 is preferably carried out, with the cleaning element 31 and/or the cleaning unit 26 preferably slowing down and/or slowing down its speed in the cleaning direction G at the at least one position, which is preferably assigned to the respective positioning gap 07 is stopped and/or the feed device 13 ejects at least one fluid, for example a gas and/or a gas mixture, in particular air, and/or a liquid.

In a preferred embodiment of the cleaning element 31, the at least one cleaning element 31 has at least two sliding surfaces 32, which are arranged one behind the other in the cleaning direction G, preferably in alignment with one another. For example, the at least two sliding surfaces 32 are spaced apart from one another by a distance greater than zero. In particular, at least one edge 51 is arranged in the cleaning direction G after the at least one cleaning area 37, in particular after the at least one fluid suction device 41, and/or in front of the at least one second ramp 34. The at least one cleaning region 37 is preferably elevated in the z-direction relative to a surface of the cleaning element 31 after the at least one edge 51, in particular in the z-direction relative to the at least one second ramp 34. As a result, the distance between the cleaning element 31 and the at least one exit surface 09 of the at least one print head 08 is increased, preferably directly after the cleaning area 37, in particular after the at least one fluid suction device 41. In particular, the at least one edge 51 prevents smearing of pressurized fluid that is located on the at least one exit surface 09 at this point in time, preferably when the at least one cleaning element 31 is passing the exit surface 09 in question. At least one of the at least two sliding surfaces 32 arranged one behind the other in the cleaning direction G is preferred in the cleaning direction G after the at least one cleaning area 37, in particular on the at least one second ramp 34. This ensures optimal guidance of the cleaning element 31 in the area after the at least one cleaning area 37, so that the at least one surface of the cleaning element 31 and/or the at least one second ramp 34 is at a distance greater than zero, particularly in the z direction, from the at least one exit surface 09 is guaranteed. When the at least one cleaning element 31 is placed against the at least one print head 08 or vice versa and/or when the cleaning element 31 is moved in or counter to the cleaning direction G, the at least one sliding surface 32, preferably all sliding surfaces 32, are preferably orthogonal to the cleaning direction G or arranged behind the at least one exit surface 09, for example at a distance from the at least one exit surface 09 orthogonally to the cleaning direction G, i.e. preferably arranged laterally. The at least one sliding surface 32 preferably has a greater extent in the cleaning direction G than orthogonally to the cleaning direction G.

In a preferred embodiment of the at least one cleaning element 31, the cleaning element 31 has at least two cleaning areas 37, preferably four cleaning areas 37. The at least one cleaning element 31 preferably has exactly as many cleaning regions 37 as there are rows of print heads arranged next to one another, in particular in the x-direction, in the nozzle bar 04 assigned to this cleaning element 31. The at least two cleaning areas 37 are preferably arranged next to one another orthogonally to the cleaning direction G and/or orthogonally to the y-direction and/or in the x-direction. Preferably, at least two rows of print heads 08, preferably four rows of print heads 08, more preferably all rows of print heads 08 of a nozzle bar 04, are and/or can be cleaned at the same time and/or with the at least one cleaning element 31.

For example, the at least one cleaning element 31, preferably if it comprises at least two cleaning areas 37, has at least one sliding surface 32 in each case in the x-direction before a first cleaning area 37 and/or in the x-direction after a last cleaning area 37. The at least one cleaning element 31 preferably has no additional sliding surface 32 between its first and last cleaning region 37. For example, additionally or alternatively, the at least one cleaning element 31, preferably if it comprises at least two cleaning areas 37, has at least one guide surface 36 in the x-direction before a first cleaning area 37 and/or in the x-direction after a last cleaning area 37. The at least one cleaning element 31 preferably has no additional guide surface 36 between its first and last cleaning region 37.

In a preferred embodiment, the at least one nozzle bar 04 comprises at least two rows of print heads 08. The at least two rows of print heads 08 are preferably each at an angle of at least 1° (one degree), preferably at least 3° (three degrees). more preferably 4° (four degrees) from each other. This is the case in particular when the at least one nozzle bar 04 is opposite a curved and/or cylindrical printing material guide element 02. The at least two rows of print heads 08 are preferably each at an angle of at least 1° (one degree), preferably at least 3° (three degrees), more preferably 4° (four degrees), in relation to a normal vector of the respective exit surfaces 09 arranged to each other.

A surface of the cleaning element 31 that comprises the at least one fluid supply 38 and the at least one fluid discharge 39 and the at least one fluid suction 41 is preferred, preferably the plane of the surface of the respective cleaning area 37, in each case parallel to the at least one exit surface 09 of the at least one print head 08, which of this area and/or this Cleaning area 37 is assigned arranged. More preferably, this surface and/or this cleaning area 37 is directed towards this at least one exit surface 09. Preferably, the normal vectors of at least two surfaces of the cleaning element 31, which each comprise at least one fluid supply 38 and at least one fluid discharge 39 and at least one fluid suction 41, preferably the surfaces of the at least two cleaning regions 37 of the cleaning element 31, have an angle of at least 1° to one another ( one degree), preferably at least 3° (three degrees), more preferably 4° (four degrees).

At least one throttle is preferably arranged in the fluid supply 38, in particular in a channel of the fluid supply 38. The at least one throttle is preferably designed to regulate the supply of cleaning agent to the at least one fluid supply opening 38, in particular as a function of the angular position and/or inclination of the respective cleaning area 37.

For example, additionally or alternatively, the at least two cleaning areas 37 of a cleaning element 31 are offset from one another in the cleaning direction G. In this way, they preferably reflect an offset between the existing rows of print heads 08.

The at least one cleaning element 31 preferably additionally has the at least one wiper 52 downstream of the at least one cleaning region 37 in the cleaning direction G. The at least one wiper 52 is preferably designed as a wiper lip, for example made of rubber. The at least one wiper 52 preferably extends in the x-direction over the entire length of the exit surface 09 of the at least one associated print head 08 in this direction.

The at least one nozzle bar 04 is preferably arranged at least temporarily in the depot position, the third maintenance position.

The at least one printing unit 01 preferably comprises the at least one sealing element 56. The at least one sealing element 56 is preferably embodied as a rubber lip. The at least one nozzle bar 04 preferably comprises the at least two print heads 08, more preferably at least four print heads 08, more preferably at least eight print heads 08, each with at least one exit surface 09. The at least two print heads 08, preferably the at least four print heads 08, more preferably the at least eight print heads 08 are preferably arranged in at least one row of print heads 08 along the longest side of the at least one nozzle bar 04, preferably in the y direction and/or transverse direction A. The at least one sealing element 56 is preferably arranged at least at times in direct contact with the at least two print heads 08, preferably the at least four print heads 08, more preferably the at least eight print heads 08, and/or at least at times comes into direct contact. The at least one sealing element 56 is preferably arranged at least temporarily in direct contact with all print heads 08 of the at least one row along the longest side of the at least one nozzle bar 04, preferably in the y direction and/or transverse direction A.

The at least one sealing element 56 is preferably in operative connection with the at least one print head 08, in particular its exit surface 09, preferably the at least two print heads 08, more preferably the at least four print heads 08, when the at least one nozzle bar 04 is arranged in its depot position and the at least one cleaning device 18 is arranged in its position of use and preferably additionally the at least one cleaning element 31 is arranged in its storage position.

The at least one sealing element 56 is preferably attached to at least one support 57 and/or firmly connected to it. Preferably, the at least one support 57 and/or the at least one sealing element 56 each have a longitudinal direction which directed along its longest extent. The longitudinal direction of the at least one sealing element 56 and/or the longitudinal direction of the at least one support 57 is preferably directed parallel to the longest side of the at least one nozzle bar 04, in particular parallel to the transverse direction A and/or parallel to the y-direction. The length of the at least one sealing element 56 in its longitudinal direction and/or the length of the at least one support 57 is preferably greater than the length of the at least one exit surface 09, more preferably the at least two exit surfaces 09, more preferably the at least four exit surfaces 09, more preferably of all exit surfaces 09 of the print heads 08 arranged next to one another of the at least one nozzle bar 04.

The at least one printing unit 01 preferably comprises at least two sealing elements 56. One of the at least two sealing elements 56 is preferably arranged in front of the at least one exit surface 09 in the x-direction. One of the at least two sealing elements 56 is preferably arranged downstream of the at least one exit surface 09 in the x-direction. Preferably, one sealing element 56 is in direct contact at least at times, i.e. preferably in direct contact, with the at least one contact surface 11 of the at least one print head 08 of the at least two print heads 08, preferably with all contact surfaces arranged next to one another in the y direction and/or transverse direction A 11 of the print heads 08 arranged next to one another. The at least one exit surface 09, preferably the at least two exit surfaces 09, preferably all exit surfaces 09 of the print heads 08 arranged next to one another are thus preferably delimited at least in and counter to the x-direction by at least one sealing element 56 and/or or enclosed. The two sealing elements 56 in each case are preferably arranged on the at least one support 57 opposite one another in the x-direction and spaced apart from one another. For example, the at least two mutually opposite sealing elements 56 each have two connecting pieces. One connector in the y-direction is preferred at the front end of the nozzle bar 04 and one connector in the y-direction at the rear end of the Nozzle bar 04 connecting the two opposite sealing elements 56.

The at least two sealing elements 56 and the at least two print heads 08, preferably the at least four print heads 08, preferably all print heads 08 arranged next to one another in a nozzle bar 04, preferably form a spatial area that is preferably at least partially closed when they are in operative connection with one another. More preferably, the at least two sealing elements 56 and the two connecting pieces and the at least two print heads 08, preferably the at least four print heads 08, preferably all print heads 08 of a nozzle bar 04 arranged next to one another, form a preferably at least partially closed spatial area when they are in operative connection with one another. The at least partially closed spatial area is preferably designed as a conservation area. The at least two sealing elements 56, preferably with the at least two print heads 08, more preferably additionally with the two connecting pieces, delimit the at least one preservation area. More preferably, the at least two sealing elements 56 and the at least two print heads 08 and the at least one support 57 form the at least one preservation area. The nozzle bar 04 preferably has exactly one preservation area per row of print heads 08 arranged next to one another in the y direction and/or transverse direction A. More preferably, exactly one preservation area per row of print heads 08 includes all exit surfaces 09 of all print heads 08 in this row. The preservation area preferably includes an atmosphere containing at least one preservation medium. The at least one preservation medium preferably has at least air enriched with water and/or air enriched with compressed fluid. For example, the preservation area is flushed and/or flooded with at least one fluid, for example air and/or air enriched with water, for example, and/or cleaning agent and/or pressurized fluid. This atmosphere is preferably designed to protect the at least one exit surface 09 and protects the printing fluid of the at least two print heads 08 from drying out. The at least one preservation area is therefore preferably the at least one exit surface 09 of each of the at least two print heads 08, preferably the at least two exit surfaces 09 preferably arranged next to one another in the y direction, more preferably the at least four exit surfaces 09 preferably arranged next to one another in the y direction, opposite their The environment is designed to be sealed at least at times and/or the at least one preservation area is designed to preserve the pressure fluid of the at least two print heads 08, preferably the at least four print heads 08. The at least one sealing element 56 is preferably designed to seal at least two exit surfaces 09 of at least two print heads 08 of at least one row of print heads 08 of the at least one nozzle bar 04 and/or seals them.

The at least one sealing element 56 is preferably arranged in the at least one traverse 22. The at least two print heads 08, preferably the at least four print heads 08, are preferably arranged in or on the at least one cross member 22 during direct contact with the at least one sealing element 56. As a result, the depot position is preferably defined by the position of the at least one traverse 22. For preservation purposes, the at least one sealing element 56, preferably the at least two sealing elements 56 that are preferably opposite one another, are preferably brought into contact with the at least two print heads 08, preferably the at least four print heads 08. Preferably, the at least one sealing element 56, preferably the at least two sealing elements 56 that are preferably opposite one another, can be moved and/or moved relative to the at least two print heads 08 in or out of the area between the at least one nozzle bar 04 and the transport path of the at least one printing substrate 03 educated. The at least one sealing element 56, preferably the at least two sealing elements 56, which are preferably opposite one another, are preferably positioned relative to the at least two print heads 08 in a direction orthogonal to the longest side of the at least one nozzle bar 04, preferably orthogonal to the y-direction and/or designed to move and/or move parallel to the at least one transport path of the at least one printing substrate 03. The at least one traverse 22 preferably has at least four sealing elements 56, which are designed to delimit at least two preservation areas that are different from one another. Two sealing elements 56 are preferably arranged opposite one another in the traverse 22, as a result of which the at least four sealing elements 56 in the traverse 22 are designed to delimit at least two different preservation areas. Preferably additionally or alternatively, at least two traverses 22, preferably each with at least four sealing elements 56, are designed to move and/or move together. Each row of print heads 08, for example two rows of print heads 08, of the at least one nozzle bar 04, for example four nozzle bars 04, of the printing assembly 01 is preferably assigned at least one sealing element 56, preferably two sealing elements 56.

In a preferred embodiment, the at least one cleaning device 18 comprises the at least one sealing element 56, preferably the at least two sealing elements 56. The at least one cleaning device 18 preferably has two sealing elements 56 per row of print heads 08 arranged next to one another in the y direction, for example at least two rows , preferably exactly two rows. The cleaning device 18 preferably has the at least one support 57, preferably the at least two supports 57, more preferably in each case at least one support 57 for two sealing elements 56 lying opposite one another. The at least one support 57 and/or the at least one sealing element 56 is more preferably arranged in the at least one cross member 22 embodied as a collecting trough 22. The at least one collecting tray 22 preferably at least partially encloses the at least one support 57 . The at least one cleaning device 18 preferably has the at least one cleaning element 31. The at least one cleaning element 31 is preferably arranged in the storage position when the at least one sealing element 56 is in the direct contact with the at least one print head 08. The at least one cleaning element 31 is preferably arranged in the storage position when the at least one sealing element 56 is arranged in at least intermittent direct contact with the at least one print head 08.

The at least one traverse 22 embodied in particular as a collecting trough 22 is preferably embodied to collect fluid, for example pressurized fluid, and/or dirt. In particular, the at least one collecting tray 22 is designed to collect printing fluid that is ejected by the at least one print head 08 in the depot position. Preferably, the at least one collecting pan is connected to a storage of fluid, for example for recycling or reuse, and/or a drain to which the collected fluid and/or the dirt is routed.

The at least one cleaning device 18 is preferably arranged in the usage position at least temporarily. The at least one nozzle bar 04 is then preferably optionally arranged at least in the cleaning position or in the depot position. The at least one cleaning device 18 is preferably designed to at least partially clean the nozzle bar 04 located in the cleaning position. The at least one sealing element 56, preferably the at least two sealing elements 56, is preferably arranged in direct contact with the at least one print head 08, preferably the at least two print heads 08, more preferably the at least four print heads 08, of the nozzle bar 04 arranged in the depot position. The at least one nozzle bar 04 is preferably arranged in the rest position or the first maintenance position before it is arranged in the depot position. The at least one nozzle bar 04 is preferably lowered onto the at least one sealing element 56, preferably onto the at least two sealing elements 56, for preservation. In particular, the at least one sealing element 56, preferably the at least two sealing elements 56, and/or the at least one traverse 22 is located during the lowering of the at least one nozzle bar 04 into the depot position in a position that corresponds to the usage position of the at least one cleaning device 18. If the at least one cleaning device 18 is preferably arranged in the use position, the at least one nozzle bar 04 is preferably optionally arranged at least in the first maintenance position, preferably cleaning position, or in the third maintenance position, preferably storage position. The at least one cleaning device 18 is designed to at least partially clean the nozzle bar 04 located in the first maintenance position, the cleaning position. The at least one sealing element 56 is preferably arranged in direct contact with the at least one print head 08 of the nozzle bar 04 arranged in the third maintenance position, the depot position. The at least one cleaning device 18 is and/or is arranged in the use position. Preferably, the at least one nozzle bar 04 is and/or is optionally arranged at least in the first maintenance position or in the third maintenance position. The at least one cleaning device 18 preferably at least partially cleans the nozzle bar 04 located in the first maintenance position, or preferably the at least one sealing element 56 comes into direct contact with the at least one print head 08 of the nozzle bar 04 located in the third maintenance position.

The at least one printing assembly 01 comprises the at least one cleaning device 61. The at least one cleaning device 61 is assigned to at least one nozzle bar 04 of the printing assembly 01. For example, cleaning device 61 is assigned to at least two, preferably all, nozzle bars 04 of printing assembly 01.

The at least one cleaning device 61 includes the at least one removal unit 63 with the at least one contact element 64. The at least one cleaning device 61 includes the at least one removal unit 63. More preferably, the cleaning device 61 includes at least two, preferably at least four, removal units 63. More preferably, the cleaning device 61 comprises at least as many removal units 63 as the printing assembly 01 has nozzle bars 04. More preferably, each row of print heads 08 of the at least one nozzle bar 04, in particular all nozzle bars 04 of printing assembly 01, is assigned at least one removal unit 63 and/or comes into contact with at least one removal unit 63 at least temporarily.

The at least one cleaning device 61 preferably comprises the at least one carrier 76. The at least one removal unit 63 is preferably arranged on the at least one carrier 76 and/or connected to the at least one carrier 76. At least two removal units 63 are preferably arranged on and/or connected to the at least one carrier 76, in particular on at least one common carrier 76. Preferably, exactly as many removal units 63 are arranged on the at least one, in particular a common, carrier 76 as the at least one printing unit 01 has nozzle bars 04. At least one removal unit 63 arranged on the at least one carrier 76 is preferably assigned to each nozzle bar 04 and/or is operatively connected to it at least temporarily.

The at least one cleaning device 61 comprises the at least one guide element 62 and the at least one removal unit 63. The cleaning device 61 preferably comprises at least two removal units 63, preferably at least four removal units 63, more preferably as many removal units 63 as there are nozzle bars 04 in the printing assembly 01 in question . The at least one removal unit 63 is preferably designed to move in and/or opposite to the cleaning direction G, in particular along the at least one guide element 62. Preferably additionally or alternatively, the at least one guide element 62 is the at least one removal unit 63 in and/or opposite to the cleaning direction G trained to move.

The at least one removal unit 63 comprises the at least one contact element 64. More preferably, the at least one removal unit 63 comprises precisely one contact element 64. The at least one contact element 64 is at least temporarily in direct contact with the at least one print head 08 in at least one contact area. The at least one Contact element 64 is at least temporarily in direct contact with the at least one print head 08 of the at least one nozzle bar 04 arranged in the second maintenance position. The at least one removal unit 63, in particular the at least one contact element 64, preferably has the at least one contact area with the at least one print head 08 in which the at least one contact element 64 and the at least one print head 08 are in direct contact with one another at least at times. More preferably, the at least one removal unit 63, in particular the at least one contact element 64, has exactly one contact area with the at least one print head 08. The at least one exit surface 09 of the at least one print head 08 is preferably located at least temporarily within the contact area of the at least one contact element 64 with the at least one print head 08. The at least one contact element 64 is designed to clean the at least one print head 08, more preferably the at least one exit surface 09 and/or the at least one contact surface 11 and/or the at least one positioning gap 07, with at least intermittent direct contact.

The cleaning device 61 preferably comprises the at least two removal units 63. The at least two removal units 63 are preferably arranged together on the at least one carrier 76. The at least two removal units 63 preferably have an angle of inclination with respect to the z-direction, which corresponds to an inclination with respect to the z-direction of the at least one nozzle bar 04 and/or at least one print head 08 of the nozzle bar 04. The inclination preferably corresponds to the inclination of the associated nozzle bar 04 and/or its print head 08. For example, if the transport path of the printing substrate 03 is curved within printing assembly 01 and the at least two nozzle bars 04 therefore preferably have an inclination in relation to the z-direction, the at least two removal units 63 have an inclination, preferably in relation to the z-direction, which corresponds to the inclination of the nozzle bar 04 assigned to them and /or whose at least one print head corresponds to 08. For example, in the case of a level, for example horizontal transport path, the at least two nozzle bars 04 and/or the at least two removal units 63 are preferably level, preferably horizontal, aligned and/or positioned. This preferably enables the at least one contact element 64 to be optimally positioned against the at least one print head 08 and/or its cleaning.

The at least one contact element 64 is embodied as a wiping element 64 embodied as a wiping cloth 64 . For example, the at least one contact element 64 is designed as a wipe 64 with a length of at least 50 cm (fifty centimeters), preferably at least 1 m (one meter), more preferably at least 1.5 m (one point five meters). More preferably, the at least one contact element 64 has a length greater than the extension of the nozzle bar 04 in the transverse direction A. Preferably, the at least one wipe 64 is lint free. The cloth quality, in particular the roughness, of the at least one wiping cloth 64 preferably differs according to the degree of soiling to be cleaned. For example, the at least one wiping cloth 64 has a first roughness when there is little soiling and a second roughness when there is heavy soiling, the second roughness being higher than the first roughness. The at least one wipe 64 is preferably exchangeable and/or adjustable and/or is exchanged and/or is adjusted according to the degree of soiling.

Preferably, particularly when the at least one contact element 64 is embodied as a wiping element 64, the at least one cleaning device 61 is embodied as a wiping device 61. Preferably, especially if the at least one contact element 64 as wiping element 64 is embodied, the at least one removal unit 63 is embodied as a wiping unit 63.

The at least one removal unit 63 preferably includes at least one pressure element 66, which is preferably embodied as at least one pressure roller 66. The at least one pressure element 66 is preferably configured to press the at least one contact element 64, embodied in particular as a wipe 64, at least temporarily against the at least one exit surface 09 and/or the at least one contact surface 11 and/or the at least one positioning gap 07 of the at least one print head 08. The at least one pressing element 66 is preferably spring-mounted. The at least one spring-mounted pressing element 66 is preferably set and/or adjustable with respect to its position in the z-direction. Additionally or alternatively, the contact pressure of the at least one contact-pressure element 66 against the at least one print head 08 is preferably set and/or adjustable. In particular, a contact pressure of the at least one contact element 66, with which the at least one contact element 64 is pressed against the at least one exit surface 09 and/or the at least one contact surface 11 and/or the at least one positioning gap 07, is preferably via the spring-loaded mounting, for example the Rigidity of the bearing and/or the position of the bearing in the z-direction, set and/or adjustable.

The at least one removal unit 63 preferably has at least one supply 67 of the contact element 64, which is preferably embodied as an unwinding device 67. For example, unused contact element 64, in particular embodied as a wipe 64, is collected in the supply 67, which is issued, preferably unwound, and/or can be unwound as required. The at least one contact element 64, which is arranged and/or collected on the supply 67, is preferably designed as a roll, for example as a supply roll. The at least one reservoir 67 is preferably arranged in at least one housing 74. For example, is so clean Contact element 64 protected from dirt and / or other external influences. The at least one reservoir 67 preferably has at least one element that generates a braking force. For example, the element generating at least one braking force is designed as at least one spring and/or at least one pressure element. For example, the at least one housing 74 is designed as the element that generates at least one braking force. The at least one reservoir 67 is preferably configured to adjust and/or introduce the tension of the at least one contact element 64, embodied in particular as a wipe 64, along its guide path, preferably by the element generating at least one braking force. The braking force preferably counteracts a transport movement of the at least one contact element 64 .

The at least one removal unit 63 preferably includes at least one store 68 of the at least one contact element 64, which is preferably embodied as a winding device 68. The at least one store 68 is preferably driven and/or connected to at least one drive. For example, contact element 64 is and/or can be collected on reservoir 68, which was preferably previously used to clean at least one print head 08 and/or at least one exit surface 09 and/or at least one contact surface 11 and/or at least one positioning gap 07 and/or is usable. The at least one store 68 is preferably designed to be wound up by contact element 64 and/or contact element 64 can be wound up in the at least one store 68. Preferably, the at least one contact element 64, preferably embodied as a wipe 64, which is arranged and/or collected on the store 68, is embodied as a roll, for example as a storage roll.

The at least one contact element 64 is preferably designed and/or can be guided from the at least one supply 67 via the at least one pressing element 66 to the at least one store 68. This route is described in the foregoing and in Hereinafter referred to as the guideway of the contact element 64.

The at least one cleaning device 61 preferably has the at least one drive. The at least one store 68 is preferably driven and/or connected to the at least one drive. The at least one drive is preferably designed to change the at least one contact element 64 with respect to the contact area with the at least one print head 08. The at least one contact element 64 is preferably designed to change at least its surface within the at least one contact area. The at least one contact element 64 preferably changes at least its surface, which is located within the at least one contact area. The at least one drive is preferably configured to wind the at least one contact element 64 onto the at least one store 68 and/or unwind it from the at least one supply 67. In addition or as an alternative, the at least one drive is preferably designed to be pneumatic. This advantageously increases the resistance of the at least one removal unit 63 to fluids and/or environmental influences. Alternatively, for example, the at least one drive is designed as an electric motor.

The speed at which the at least one contact element 64 is changed with regard to the contact area with the at least one print head 08 is preferably adapted to a movement of the at least one removal unit 63 in cleaning direction G and/or to the number of print heads 08 to be cleaned in a cleaning step and/or customizable. The at least one contact element 64 is preferably designed to change at least its surface within the at least one contact area. For example, the at least one contact element 64 is designed to change at least its surface continuously within the at least one contact area. Preferably alternatively, the at least one contact element 64 is configured to change at least its surface within the at least one contact region in a clocked manner and/or in a step-by-step manner. For example, the at least one Distance unit 63 clocking on.

The at least one removal unit 63 preferably has at least one clock generator 78 . The at least one clock generator 78 is preferably the at least one drive or is connected to the at least one drive, for example via at least one line 73 embodied as a drive line 73. The at least one clock generator 78 is preferably embodied as a linearly guided element, more preferably as at least one piston and/or at least one pneumatic cylinder. The at least one drive is preferably embodied to pneumatically drive the at least one clock generator 78 embodied as a linearly guided element.

The at least one removal unit 63 preferably has at least one pick-off element 77. The at least one clock generator 78 is preferably configured to transmit at least one movement to the at least one pickup element 77. The at least one pickup element 77 is preferably designed as a gear wheel and/or as a ratchet wheel. The at least one pick-off element 77 is preferably operatively connected to the at least one contact element 64; the at least one pick-off element 77 is preferably configured to drive the at least one contact element 64. The at least one pick-off element 77 is preferably configured to drive the at least one store 68. The at least one store 68 is preferably configured to wind up the at least one contact element 64, in particular as a result of its drive.

The at least one clock generator 78 is preferably designed to drive the at least one pickup element 77. The at least one pick-off element 77 is preferably designed to drive the at least one store 68. The at least one memory 68 is preferably configured to transmit at least one movement to the at least one contact element 64. The at least one clock generator 78 is preferably configured to transmit at least one movement, for example via at least one pulse, to the at least one pickup element 77, which transmits this at least one movement the at least one memory 68 and thus to the at least one contact element 64. The at least one clock generator 78 preferably comes into contact with the at least one pick-off element 77 in a linear stroke movement, i.e. forwards and/or backwards, and this at least one pick-off element 77 is thus designed to move at least around part of its circumference. The at least one clock generator 78 is preferably configured to move the at least one pickup element 77 in a first direction of rotation at least twenty times, preferably thirty times, more preferably at least forty times, before it has completed a complete rotation of 360° (three hundred and sixty degrees). For example, each individual pulse that sets the at least one pick-off element 77 in motion is referred to as an individual cycle.

The at least one removal unit 63 preferably has at least one blocking element 79, for example a reverse rotation lock. The at least one blocking element 79 is preferably permanently in contact with the at least one pick-off element 77. The at least one blocking element 79 is preferably configured to selectively block the movement of the at least one pick-off element 77. More preferably, the blocking element 79 is designed to allow only the first direction of rotation of the at least one pick-off element 77. The at least one blocking element 79 is preferably configured to block rotation of the at least one pick-off element 77 counter to the first direction of rotation.

The at least one pick-off element 77 and/or the at least one clock generator 78 and/or the at least one blocking element 79 is preferably arranged within the at least one housing 74.

For example, the at least one removal unit 63 comprises at least one deflection means 69. The at least one deflection means 69 is preferably along the guide path of the contact element 64 between the at least one Stock 67 and the at least one pressing element 66 is arranged. For example, particularly if the at least one contact element 64 is embodied as a wiping cloth 64, the wiping cloth 64 is and/or can be deflected, starting from the at least one supply 67 along its guide path, around the at least one deflection means 69 with respect to its transport direction T. This preferably ensures direct contact between contact element 64 and the at least one print head 08 only in the at least one contact area, i.e. on the at least one pressure element 66. For example, in addition to or as an alternative to the at least one element generating a braking force, the tension of the at least one contact element 64, embodied in particular as a wiping cloth 64, can be adjusted and/or adjusted along its guide path, preferably by the at least one deflection means 69.

The at least one removal unit 63 preferably comprises at least one nozzle 71. The at least one nozzle 71 is preferably arranged along the guide path of the at least one contact element 64 between the at least one reservoir 67 and the at least one pressing element 66, and more preferably on the guide path of the contact element 64 and/or aimed at the at least one contact element 64. The at least one nozzle 71 is preferably designed to spray fluid onto the at least one contact element 64 along the guide path of the at least one contact element 64 in front of the at least one contact area. The at least one deflection means 69 preferably comprises the at least one nozzle 71. The at least one deflection means 69 preferably comprises at least two nozzles 71, more preferably a large number of nozzles 71. The at least one nozzle 71 is preferably arranged on the circumference of the at least one deflection means 69 and directed towards the guide path of the at least one contact element 64. For example, at least two nozzles 71 are arranged next to one another along the circumference of the at least one deflection means 69 .

Preferably, the at least one nozzle 71 has at least one feed line 72 with a Source connected to detergent. The at least one nozzle 71 is preferably designed to spray fluid, preferably cleaning agent, for example pigment-free compressed fluid, onto the at least one contact element 64, preferably along the guide path of the at least one contact element 64 in front of the at least one pressing element 66 and/or preferably in front of the at least one contact area. For example, in particular if the at least one removal unit 63 is inclined to a horizontal plane, preferably so that the longitudinal axis of the at least one deflection means 69 is inclined to the horizontal plane, a first part of nozzles 71 of the at least two nozzles 71 can be controlled in each case, which is positioned higher than a second part of nozzles 71 of the at least two nozzles 71 . For example, the at least one supply line 72 is then designed to transport cleaning agent at least to that part of the nozzles 71 which is positioned higher than the respective at least one further part of the nozzles 71. This uses the gravity of the cleaning agent in an advantageous manner. The cleaning agent is then preferably distributed independently between all nozzles 71.

The at least one contact element 64 is preferably dry when it is arranged on the at least one supply 67. The at least one contact element 64 is preferably moistened and/or brought into a damp or wet state by the spraying of cleaning agent from the at least one nozzle 71 . For example, the cleaning agent is in the form of an ink that has no pigments. In an alternative embodiment, for example, a wet contact element 64 can be used and/or is used, which is damp or wet, for example soaked with cleaning agent, when it is arranged on the at least one reservoir 67 . In a further alternative embodiment, for example, contact element 64 is dry when it comes into direct contact with the at least one print head 08. Preferably, the contact element 64 is not sprayed with cleaning agent through the at least one nozzle 71. For example, a combination of one of the above-described versions of the at least a contact element 64 is possible, so that, for example, firstly in a first cleaning step a damp or wet contact is created and in a second cleaning step a dry contact is created between the at least one wiping cloth 64 and the at least one print head 08.

The at least one contact element 63 cleans the at least one print head 08, in particular its exit surface 09 and/or the at least one contact surface 11, preferably through direct contact. For this purpose, the at least one removal unit 63 is preferably moved into the at least one use position. The at least one nozzle bar 04 is preferably lowered onto the at least one contact element 64 and is thereby preferably arranged in the second maintenance position. Removal unit 63 preferably moves relative to the at least one print head 08. The at least one removal unit 63 is preferably moved in the cleaning direction G, for example alternatively in the opposite direction to the cleaning direction G. The at least one contact element 64 preferably comes into contact one after the other with the at least two print heads 08 arranged in a row. For example, the at least one contact element 64 wipes the at least one exit surface 09, preferably the at least two exit surfaces 09, and/or the at least one contact surface 11 , Preferably the at least two contact surfaces 11 from. The surface of the at least one contact element 64 is preferably changed during the movement of the at least one removal unit 63 in or counter to the cleaning direction G. The contact element 64 is preferably unwound and/or wound up. With each forward movement in or counter to the cleaning direction G, another area of the contact element 64 comes into direct contact with the at least one print head 08 a pickup element 77 causes. For example, the at least one contact element 64 is designed to clean the at least one print head 08 only during a movement in cleaning direction G. For example, alternatively that is at least a contact element 64 is designed to clean the at least one print head 08 during a movement in cleaning direction G and during a movement counter to cleaning direction G.

The at least one printing assembly 01 comprises the at least one cleaning device 18 and the at least one cleaning device 61. The at least one cleaning device 18 and the at least one cleaning device 61 can preferably be moved independently of one another.

The at least one print head 08 of the at least one nozzle bar 04, preferably the at least one print head 08 of the at least one nozzle bar 04 arranged in the at least one maintenance position, is preferably in contact with the at least one cleaning device 18 and/or in contact with the at least one cleaning device 61 trained to kick. Preferably, either the at least one cleaning device 18 and/or the at least one cleaning device 61 comes into contact with the at least one print head 08. Additionally or alternatively, the at least one cleaning device 18 and/or the at least one cleaning device 61 are optionally moved at least temporarily into the area between the at least one nozzle bar 04 and the transport path of the at least one printing substrate 03. Additionally or alternatively, the at least one cleaning device 18 and/or the at least one cleaning system 61 are optionally moved into the area between the at least one nozzle bar 04 and the transport path of the at least one printing substrate 03. More preferably, the at least one cleaning device 18 and/or the at least one cleaning system 61 are moved independently of one another into the area between the at least one nozzle bar 04 and the transport path of the printing substrate 03. Additionally or alternatively, the at least one cleaning device 18 and/or the at least one cleaning system 61 are optionally arranged in the area between the at least one nozzle bar 04 and the transport path of printing substrate 03.

In a first arrangement of the optional arrangement, the at least one cleaning device 18, preferably the at least one cleaning element 31, is preferably arranged within the area between the at least one nozzle bar 04 and the transport path of printing substrate 03. The at least one cleaning device 61, preferably at least the at least one removal unit 63, is then preferably arranged outside the area between the at least one nozzle bar 04 and the transport path for printing substrate 03. The at least one nozzle bar 04 is arranged in the first maintenance position or, for example, in the third maintenance position. In the first arrangement, the at least one cleaning device 18 is designed to clean the at least one print head 08 or, for example, to seal the at least one print head 08 by means of the at least one sealing element 56. In the first arrangement, the at least one removal unit 63 is preferably arranged in the at least one storage position.

Additionally or alternatively, in a second arrangement of the optional arrangement, the at least one cleaning device 61, preferably the at least one removal unit 63, is preferably arranged within the area between the at least one nozzle bar 04 and the transport path for printing substrate 03. The at least one cleaning device 18, preferably at least the at least one cleaning element 31, is then preferably arranged outside the area between the at least one nozzle bar 04 and the transport path of printing substrate 03. The at least one nozzle bar 04 is arranged in the second maintenance position. In the second arrangement, the at least one cleaning device 61, preferably the at least one removal unit 63, is designed to clean the at least one print head 08. In the second arrangement, the at least one cleaning device 18 is preferably arranged in the at least one storage position. In the second arrangement, the at least one cleaning element 31 is preferably arranged in the at least one storage position.

Additionally or alternatively, in a third arrangement of the optional arrangement, both the at least one cleaning device 18, preferably at least the at least one cleaning element 31, and the at least one cleaning device 61, preferably at least the at least one removal unit 63, are preferably located outside the area between the at least a nozzle bar 04 and the transport path for printing material 03. In the third arrangement, the at least one cleaning device 18 is preferably arranged in the at least one storage position. In the third arrangement, the at least one cleaning element 31 is preferably arranged in the at least one storage position. In the third arrangement, the at least one removal unit 63 is preferably arranged in the at least one storage position. The at least one nozzle bar 04 is preferably arranged in the third arrangement in the printing position.

More preferably, the at least one nozzle bar 04 is first moved from the at least one printing position to the at least one idle position. The at least one nozzle bar 04 is then preferably moved from the at least one idle position to the at least one maintenance position. The at least one cleaning device 18 and/or the at least one cleaning system 61 is preferably moved into the area between the at least one nozzle bar 04 and the transport path if the at least one nozzle bar 04 is arranged in the at least one idle position. Preferably additionally or alternatively, the at least one nozzle bar 04 is optionally lowered onto the at least one cleaning device 18 or onto the at least one cleaning system 61. The at least one nozzle bar 04 is preferably positioned in the at least one maintenance position, at least as a result of being lowered.

The at least one cleaning device 18 and/or the at least one cleaning system 61 clean the at least one print head 08 at least temporarily.

In a preferred embodiment, the at least one sealing element 56, preferably the at least two sealing elements 56, and/or the at least one cleaning device 18 and/or the at least one cleaning device 61 is optionally arranged in contact with the at least one nozzle bar 04. The at least one print head 08 of the at least one nozzle bar 04 is preferably optionally in contact with the at least one cleaning device 18 and/or in contact with the at least one cleaning device 61 and/or in contact with the at least one sealing element 56, preferably the at least two sealing elements 56 , being trained and/or making contact. The at least one print head 08 of the at least one nozzle bar 04 arranged in the at least one maintenance position is preferably in contact with the at least one cleaning device 18 and/or in contact with the at least one cleaning device 61 and/or in contact with the at least one sealing element 56, preferably the at least two sealing elements 56, formed stepping and / or comes into contact. The at least one cleaning device 18 is designed to move and/or move along the at least one guide element 53 and/or the at least one removal unit 63 is designed to move and/or move along the at least one guide element 62. The at least one print head 08 is preferably optionally cleaned by the at least one cleaning device 18 and/or cleaned by the at least one cleaning device 61 or preserved by the at least one sealing element 56, preferably the at least two sealing elements 56, and/or protected from the environment of the print head 08 sealed. Optionally, the at least one cleaning device 18 or the at least one cleaning system 61 cleans the at least one print head 08, preferably the at least two print heads 08, more preferably the at least two print heads 08 in a row, of the at least one nozzle bar 04, preferably of the at least one nozzle bar 04 at least four nozzle bars 04.

The expression “optionally” preferably describes above and below that there are at least two operating states to be distinguished from one another, for example at least three operating states. The at least two operating states can preferably be assumed independently of one another as a function of operating specifications or other conditions. If either a first element and/or a second element comes into contact with a third element, this preferably describes that depending on operating specifications or other conditions, either the first element or the second element or both elements come into contact with the third element. For this purpose, the machine has the first element and the second element and the third element.

The at least one cleaning device 18 is preferably designed to make selective contact with the at least one print head 08 and/or makes contact if the at least one nozzle bar 04 has previously been in a printing operating state for at least one hour, preferably for at least two hours and/or if the at least one nozzle bar 04 previously or will be in a non-pressing operating state for at least one hour, preferably for at least two hours. The at least one cleaning device 18 is preferably designed to selectively clean the at least one print head 08 and/or selectively cleans it if the at least one nozzle bar 04 has previously had a printing operating state for at least one hour, preferably for at least two hours, and/or if the at least one nozzle bar 04 has previously or will be in a non-printing operating state for at least one hour, preferably for at least two hours. The at least one cleaning device 18 is preferably optionally arranged in the area between the at least one nozzle bar 04 and the transport path for printing material 03 if the at least one nozzle bar 04 has previously been in a printing operating state for at least one hour, preferably for at least two hours and/ or if the at least one nozzle bar 04 has previously or will be in a non-printing operating state for at least one hour, preferably for at least two hours.

The at least one cleaning device 61 is preferably designed so that it optionally comes into contact with the at least one print head 08 and/or makes contact and/or preferably cleans it and/or is preferably optionally located in the area between the at least one nozzle bar 04 and the transport path of printing substrate 03 if the at least one nozzle bar 04 was previously in a printing operating state, i.e. printing fluid was transferred to at least one printing substrate 03, for at least six hours, preferably at least eight hours, and/or if the at least one nozzle bar 04 was previously or subsequently for has had or will have a non-printing operating state for at least four hours, preferably at least five hours, more preferably at least six hours. Additionally or alternatively, if the at least one nozzle bar 04 has pressure fluid which has a viscosity, preferably a dynamic viscosity, of at least 3 mPa*s (three millipascal seconds), preferably at least 4.5 mPa*s (four point five millipascal seconds), and /or which has a maximum viscosity of 6 mPa*s (six millipascal seconds), preferably a maximum of 5.5 mPa*s (five point five millipascal seconds). Preferably, the foregoing viscosity values refer to the viscosity between 20°C (twenty degrees Celsius) and 40°C (forty degrees Celsius), preferably at least 25°C (twenty-five degrees Celsius) and/or at most 35°C (thirty-five degrees Celsius). degrees Celsius), and/or were preferably determined according to DIN EN ISO 2884-1:2006-09. Additionally or alternatively, if the at least one nozzle bar 04 has printing fluid which has a pigment content of the printing fluid of at least 1%, preferably at least 2%, more preferably at least 3%, more preferably at least 4% and/or which preferably has a Pigment content of the printing fluid of at most 18%, preferably at most 14%, more preferably at most 10%, more preferably at most 7%. Additionally or alternatively, if the at least one printing substrate 03 is in the form of paper and/or cardboard and/or corrugated cardboard and/or cardboard, for example because its processing puts a particular strain on the printing press. Additionally or alternatively, if the at least one printing substrate 03 is in the form of paper and/or cardboard and/or corrugated cardboard and/or cardboard, for example because processing it places a particular load on the printing press. Additionally or alternatively, if the at least one printing substrate 03 has a pigment coating of at least 5%, preferably at least 8%, more preferably at least 10%, of the total weight of the at least one printing substrate 03 and/or if the at least one printing substrate 03 has a pigment coating of at most 30 %, preferably a maximum of 25%, more preferably a maximum of 20%, of the total weight of the at least one printing substrate 03. Additionally or alternatively, if the printing fluid is designed for packaging printing and/or for printing packaging material.

The at least one sealing element 56, preferably the at least two sealing elements 56, is preferably designed so that it comes into selective contact with the at least one print head 08, preferably the at least two print heads 08, more preferably the at least four print heads 08, and/or makes contact, if the at least one nozzle bar 04 is in a non-printing operating state for at least thirty minutes, preferably for at least sixty minutes. The at least one sealing element 56 preferably makes selective contact with the at least one print head 08 during the at least thirty minutes of the non-printing operating state, preferably before or after the at least one cleaning device 18 and/or before or after the at least one cleaning device 61.

For example, additionally or alternatively, the at least one contact surface 11 is cleaned independently of the at least one exit surface 09. For example, the at least one contact surface 11 is cleaned by at least one additional, second cleaning head, which differs from that described above, preferably as a The cleaning element 31 formed in the first cleaning head 31 differs, for example, by the type of cleaning to be carried out by the cleaning device 18 and/or is formed for the exclusive cleaning of the at least one contact surface 11. For example, the at least one second cleaning head is arranged in the at least one cleaning unit 26 in addition to or as an alternative to the first cleaning head 31 . For example, the at least one second cleaning head can be removed from or inserted into the at least one cleaning unit 26 . The at least one second cleaning head is preferably fastened in the at least one cleaning unit 26 by a closure, preferably a plug-in system. In particular, the first cleaning head 31 arranged in the at least one cleaning unit 26 can be exchanged and/or exchanged for the second cleaning head or vice versa, at least temporarily, for example during intensive cleaning of the at least one contact surface 11.

Reference List

01

Printing unit, non-impact printing unit, inkjet printing unit

02

substrate guiding element

03

substrate

04

nozzle bar

05

-

06

positioning guide

07

positioning gap

08

printhead, inkjet printhead

09

exit surface

10

-

11

contact surface, spacer surface

12

-

13

Feeding device, nozzle, cleaning nozzle

14

feeding element

15

-

16

outlet element, limiting element

17

outlet opening, recess

18

cleaning device

19

Guide system (18)

20

-

21

cleaning drive

22

Traverse, catch basin

23

Support device, first, positioning aid

24

Support device, second, cleaning aid

25

-

26

cleaning unit (18)

27

carrier

28

mounting element

29

power element

30

-

31

Cleaning element, cleaning head, first (18)

32

sliding point, sliding surface

33

Ramp, first, entrance ramp

34

Ramp, second, exit ramp

35

-

36

Guide device, guide surface

37

cleaning area

38

Fluid supply, fluid supply port

39

Fluid drain port, first, fluid drain

40

-

41

Fluid discharge port, second, fluid suction

42

fastener

43

outlet element, opening element

44

cleaning guide

45

-

46

positioning angle

47

opening angle

48

discharge angle

49

suction angle

50

-

51

edge

52

wiper

53

guide element (18)

54

Traverse, attachment (18)

55

-

56

sealing element

57

edition

58

-

59

-

60

-

61

Cleaning device, wiping device

62

guide element (61)

63

Removal Unit, Wipe Unit (61)

64

Contact element, wiping element, wiping cloth (61)

65

-

66

Pressure element, pressure roller

67

stock, unwinding device

68

storage, winding device

69

deflection means

70

-

71

nozzle (63)

72

supply line

73

cable, drive cable

74

Housing

75

-

76

carrier

77

pickup element

78

clock

79

blocking element

80

-

81

swivel element (61)

x

x direction

y

y direction

e.g

z direction

T

transport direction

A

transverse direction

L

outlet direction

G

Cleaning direction, direction, horizontal

Claims (15)

1. Printing press, the printing press comprising at least one printing unit (01) comprising at least four nozzle bars (04), each comprising at least one print head (08), at least one nozzle bar (04) of the at least four nozzle bars (04) having at least one printing position and at least one service position, the at least one nozzle bar (04) being selectively arranged in the printing position or in the at least one service position, the at least one service position being configured as a first service position, in the first service position the at least one nozzle bar (04) having a first distance with respect to the transport path of printing substrate (03), at least one second service position being configured as a second service position, in the second service position the at least one nozzle bar (04) having a second distance with respect to the transport path, the at least one printing unit (01) comprising at least one cleaning device (18) and at least one cleaning system (61), the at least one cleaning device (18) comprising at least one cleaning element (31) including at least one fluid supply opening (38), the at least one cleaning system (61) comprising at least one removal unit (63) comprising at least one contact element (64), the contact of the at least one print head (08) with the at least one cleaning device (18) corresponding to a contactless cleaning of at least one exit surface (09) of the at least one print head (08), the first service position corresponding to a positioning of the at least one nozzle bar (04) during a contactless cleaning of the at least one exit surface (09) of the at least one print head (08) of the at least one nozzle bar (04), the at least one nozzle bar (04) being arranged in the second service position when contact with the at least one cleaning system (61) occurs, characterized in that the at least one cleaning device (18) or the at least one cleaning system (61) is selectively arranged in an area between the at least one nozzle bar (04) and a transport path of printing substrate (03), in that the at least one service position is arranged in vertical direction above the printing position, and in that the second distance of the second service position of the nozzle bar (04) is less than in the first service position.
2. Printing press according to claim 1, characterized in that the at least one removal unit (63) has at least one supply position and at least one operating position, in that, in the at least one operating position, the at least one removal unit (63) is arranged within the area between the at least one nozzle bar (04) and the transport path of the printing substrate (03), and/or in that the at least one cleaning element (31) has at least one supply position and at least one operating position, and in that, in the at least one operating position, the at least one cleaning element (31) is arranged within the area between the at least one nozzle bar (04) and the transport path of the printing substrate (03).
3. Printing press according to claim 1 or 2, characterized in that the at least one nozzle bar (04) of the at least four nozzle bars (04) comprises at least one print head (08) including at least one exit surface (09) including at least one opening, in that the at least one fluid supply opening (38) of the at least one cleaning element (31) arranged in the operating position has a relative distance in the y direction and/or in the transverse direction (A) with respect to the at least one opening of the at least one exit surface (09) of the at least one print head (08), in that the relative distance of the at least one fluid supply opening (38) of the at least one cleaning element (31) arranged in the operating position with respect to the at least one opening of the at least one exit surface (09) of the at least one print head (08) is no more than one time as large as an extension in the transverse direction (A) of the at least one exit surface (09) of the at least one print head (08) of the at least one nozzle bar (04) to be cleaned by the at least one cleaning device (18), and/or in that the at least one contact element (64) of the at least one removal unit (63) arranged in the operating position has a relative distance in the y direction and/or in the transverse direction (A) with respect to the at least one opening of the at least one exit surface (09) of the at least one print head (08), in that the relative distance of the at least one contact element (64) of the at least one removal unit (63) arranged in the operating position with respect to the at least one opening of the at least one exit surface (09) of the at least one print head (08) is no more than one time as large as an extension in the transverse direction (A) of the at least one exit surface (09) of the at least one print head (08) of the at least one nozzle bar (04) to be cleaned by the at least one removal unit (63).
4. Printing press according to claim 1 or 2 or 3, characterized in that the at least one cleaning device (18) has at least one storage position and at least one usage position, in that, in the at least one usage position, the at least one cleaning device (18) is arranged within the area between the at least one nozzle bar (04) and the transport path of printing substrate (03), and/or in that the at least one fluid supply opening (38) of the at least one cleaning element (31) of the at least one cleaning device (18) arranged in the usage position has a relative distance in the x direction and/or in the transport direction (T) with respect to the at least one opening of the at least one exit surface (09) of the at least one print head (08), in that the relative distance of the at least one fluid supply opening (38) of the at least one cleaning element (31) of the at least one cleaning device (18) arranged in the usage position with respect to the at least one opening of the at least one exit surface (09) of the at least one print head (08) is no more than one time as large as the extension of the at least one cleaning device (18) in the transport direction (T), and/or in that, in the at least one storage position, the at least one cleaning device (18) is arranged along an x direction upstream or downstream from the at least one nozzle bar (04), and/or in that, in the at least one storage position, the at least one cleaning device (18) is arranged along a transport direction (T) of printing substrate (03) at the position of the transport path beneath the at least one nozzle bar (04) upstream or downstream from the at least one nozzle bar (04), and/or in that the at least one fluid supply opening (38) of the at least one cleaning element (31) of the at least one cleaning device (18) arranged in the storage position has a relative distance in the x direction and/or in the transport direction (T) with respect to the at least one opening of the at least one exit surface (09) of the at least one print head (08), and in that the relative distance of the at least one fluid supply opening (38) of the at least one cleaning element (31) of the at least one cleaning device (18) arranged in the storage position with respect to the at least one opening of the at least one exit surface (09) of the at least one print head (08) is at least twice as large as an extension of the at least one cleaning device (18) in the transport direction (T).
5. Printing press according to claim 2 or 3 or 4, characterized in that, in the at least one supply position, the at least one cleaning element (31) is arranged along a longest side of the at least one nozzle bar (04) and/or along a y direction outside the area between the at least one nozzle bar (04) and the transport path of the printing substrate (03), and/or in that the at least one fluid supply opening (38) of the at least one cleaning element (31) arranged in the supply position has a relative distance in the y direction and/or in the transverse direction (A) with respect to the at least one opening of the at least one exit surface (09) of the at least one print head (08), in that the relative distance of the at least one fluid supply opening (38) of the at least one cleaning element (31) arranged in the supply position with respect to the at least one opening of the at least one exit surface (09) of the at least one print head (08) is at least twice as large as an extension in the transverse direction (A) of the at least one exit surface (09) of the at least one print head (08) of the at least one nozzle bar (04) to be cleaned by the at least one cleaning device (18), and/or in that, in the at least one supply position, the at least one removal unit (63) is arranged along a longest side of the at least one nozzle bar (04) and/or along a y direction outside the area between the at least one nozzle bar (04) and the transport path of the printing substrate (03), and/or in that the at least one contact element (64) of the at least one removal unit (63) arranged in the supply position has a relative distance in the y direction and/or in the transverse direction (A) with respect to the at least one opening of the at least one exit surface (09) of the at least one print head (08), and in that the relative distance of the at least one contact element (64) of the at least one removal unit (63) arranged in the supply position with respect to the at least one opening of the at least one exit surface (09) of the at least one print head (08) is no more than one time as large as an extension in the transverse direction (A) of the at least one exit surface (09) of the at least one print head (08) of the at least one nozzle bar (04) to be cleaned by the at least one removal unit (63).
6. Printing press according to claim 4 or 5, characterized in that the at least one cleaning device (18) comprises at least one guide system (19) comprising at least one guide element (53), in that the at least one storage position and the at least one usage position are arranged along the at least one guide element (53), and in that the at least one storage position and the at least one usage position are spaced apart from one another at a distance of greater than zero.
7. Printing press according to claim 6, characterized in that the printing unit (01) comprises at least two cleaning devices (18), in that the at least two cleaning devices (18) are jointly connected to the at least one guide system (19), and/or in that the at least two cleaning devices (18) simultaneously have the at least one storage position or the at least one usage position.
8. Printing press according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7, characterized in that, in a first arrangement of the selective arrangement, the at least one cleaning device (18) is arranged within the area between the at least one nozzle bar (04) and the transport path of printing substrate (03), and in that at least the at least one removal unit (63) is arranged outside the area between the at least one nozzle bar (04) and the transport path of printing substrate (03), and/or in that, in a second arrangement of the selective arrangement, the at least one removal unit (63) is arranged within the area between the at least one nozzle bar (04) and the transport path of printing substrate (03), and in that the at least one cleaning device (18) is arranged outside the area between the at least one nozzle bar (04) and the transport path of printing substrate (03), and/or in that, in a third arrangement of the selective arrangement, both the at least one cleaning device (18) and at least the at least one removal unit (63) are arranged outside the area between the at least one nozzle bar (04) and the transport path of printing substrate (03).
9. Printing press according to claim 2 or 3 or 4 or 5 or 6 or 7 or 8, characterized in that the at least one cleaning system (61) comprises at least one guide element (62), and in that the at least one removal unit (63) is arranged along the at least one guide element (62), along a longest side of the at least one nozzle bar (04) and/or along a y direction, in the at least one supply position or in the at least one operating position.
10. Printing press according to claim 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9, characterized in that the at least one cleaning system (61) comprises at least two removal units (63), in that the at least two removal units (63) are jointly arranged on at least one carrier (76), in that the at least one carrier (76) has the at least one supply position and the at least one operating position, and/or in that the at least two removal units (63) have an angle of inclination with respect to a z direction which corresponds to an inclination with respect to the z direction of the assigned nozzle bar (04) and/or of at least one print head (08) of the assigned nozzle bar (04).
11. Printing press according to claim 1 or 2 or 3 or 4 or 5 or 6 or 7 or 8 or 9 or 10, characterized in that the printing unit (01) comprises at least one sealing element (56), in that, in a third service position, this being the depot position, the at least one sealing element (56) is arranged in direct contact with the at least one nozzle bar (04), and/or in that the at least one sealing element (56) is configured to seal at least two exit surfaces (09) of at least two print heads (08) of at least one row of print heads (08) of the at least one nozzle bar (04).
12. Method for cleaning at least one nozzle bar (04) of at least one printing unit (01), the at least one printing unit (01) comprising at least four nozzle bars (04), each comprising at least one print head (08), at least one print head (08) of at least one nozzle bar (04) of the at least four nozzle bars (04) being cleaned by at least one cleaning device (18) comprising at least one cleaning element (31), which is arranged in an operating position, including at least one fluid supply opening (38), the at least one print head (08) of the at least one nozzle bar (04) of the at least four nozzle bars (04) being cleaned by at least one cleaning system (61) comprising at least one removal unit (63), which is arranged in at least one operating position, comprising at least one contact element (64), an x direction corresponding to a direction along a shortest side of the respective nozzle bar (04), a y direction corresponding to a direction along a longest side of the respective nozzle bar (04), the at least one cleaning device (18) being moved along at least one guide element (53) of at least one guide system (19) from at least one storage position into at least one usage position, or vice versa, characterized in that, in the at least one storage position, the at least one cleaning device (18) is arranged along the x direction upstream or downstream from the at least one nozzle bar (04), in that, in the operating position, the at least one cleaning element (31) is arranged within an area between the at least one nozzle bar (04) and a transport path of printing substrate (03), in that the at least one contact element (64) is configured as a wiping cloth (64), in that, in the at least one operating position, the at least one removal unit (63) is arranged within the area between the at least one nozzle bar (04) and the transport path of printing substrate (03), and in that the at least one removal unit (63) is moved along at least one guide element (62), along a longest side of the at least one nozzle bar (04) and/or along a y direction.
13. Method according to claim 12, characterized in that the at least one cleaning device (18) or the at least one cleaning system (61) selectively cleans the at least one print head (08) of the at least one nozzle bar (04) of the at least four nozzle bars (04), and/or in that the at least one cleaning device (18) or the at least one cleaning system (61) is selectively displaced into an area between the at least one nozzle bar (04) and a transport path of printing substrate (03).
14. Method according to claim 12 or 13, characterized in that the at least one nozzle bar (04) is selectively arranged in a printing position or in at least one service position, in that the at least one nozzle bar (04) is moved in a direction having a larger vertical component and a smaller horizontal component from the printing position into the at least one service position and/or from the at least one service position into the printing position, and/or in that, in the at least one service position, the at least one nozzle bar (04) is arranged in vertical direction above the printing position.
15. Method according to claim 14, characterized in that the at least one service position is configured as a first service position, in that at least one second service position is configured as a second service position, in that the at least one nozzle bar (04) is positioned in the first service position during the contactless cleaning of the at least one print head (08) of the at least one nozzle bar (04), and/or in that the at least one nozzle bar (04) is positioned in the second service position when contact with the at least one cleaning system (61) occurs.

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