DE102014206993B4 - Printing unit with at least one print head and at least one cleaning device - Google Patents

Abstract

Printing unit (211; 411), wherein the printing unit (211; 411) has at least one print head (212; 412) and at least one cleaning device (222) with at least one movable cleaning module (150) and wherein the at least one cleaning module (150) has at least one Contact element (151) which can be brought into contact with at least one nozzle surface (232) of the at least one print head (212; 412) by means of at least one adjusting drive (152) and wherein the at least one contact element (151) is at a first location of at least one lever body (153) is arranged on this at least one lever body (153) and wherein the at least one lever body (153) is mounted on a second location of this at least one lever body (153) on at least one carrier (154) and wherein the at least one adjusting drive (152 ) at a third point of the at least one lever body (153) is in contact with this at least one lever body (153) and / or can be brought and wherein along the at least est a lever body (153) the third point is arranged between the first point and the second point, characterized in that the at least one cleaning module (150) at least one on the at least one print head (212; 412) and has at least one contact element (151) aligned and / or alignable first dispensing device (158) for cleaning agent.

Description

The invention relates to a printing unit with at least one print head and at least one cleaning module according to the preamble of claim 1.

Different printing processes are known that can be used in printing machines. One such printing method is ink jet printing or ink jet printing. In this case, individual drops of coating agent are ejected from nozzles of print heads and transferred to a printing substrate in such a way that a printed image is produced on the printing substrate. Different print images can be created by individually controlling a large number of nozzles. There is no fixed printing form, so it is possible to design each individual print product individually. As a result, personalized printed products can be produced and / or, due to the saving of printing forms, small editions of printed products can be produced at low cost.

An exact match of a print image on the front and back of a substrate printed on both sides is called a register (DIN 16500-2). In multi-color printing, one speaks of register (DIN 16500-2) when individual print images of different colors are put together exactly to match one image. Suitable measures must also be taken in connection with inkjet printing in order to maintain register and / or register.

Through the DE 10 2011 076 899 A1 a printing machine is known, the printing machine having a first printing unit which has a central cylinder and at least one inkjet print head.

Inks and printing inks are preferably solutions or dispersions of at least one colorant in at least one solvent. Examples of suitable solvents are water and / or organic solvents. Inks here preferably have no binder or relatively little binder, while printing inks preferably contain a relatively large amount of binder and more preferably further auxiliaries. Colorants can be pigments and / or dyes, pigments being insoluble in the application medium, while dyes are soluble in the application medium. Nevertheless, colorless lacquers are also meant in the following when coating agents and / or inks and / or printing inks are discussed.

In printing units, contamination occurs again and again, for example from dried-on coating agents such as printing ink or ink or from parts of a printing material such as paper fibers or from dust or the like or from mixtures of the substances mentioned. As a result, for example, nozzles of print heads can be narrowed or clogged, which can lead to incorrect application of coating agent. Such contamination can have negative consequences both inside nozzles and on the outside nozzle surfaces of printheads. Different cleaning devices are therefore known.

Through the WO 2013/134737 A1 a cleaning device with adjustable contact elements is known.

Through the EP 2 233 294 B1 a printing unit is known which has at least one print head and at least one cleaning device and wherein a cleaning module has a contact element which can be brought into contact with a nozzle surface of the print head by means of a positioning drive and wherein the contact element is arranged at a first point of a lever body on this lever body and wherein the lever body is mounted on a carrier at a second point of this lever body and wherein the adjusting drive is in contact with this lever body at a third point of the lever body.

Through the US 2010/0079539 A1 A printing unit is known which has at least one print head and at least one and wherein the at least one print head and the at least one cleaning module are arranged movably relative to one another and wherein the at least one cleaning module has at least one first dispensing device for Has detergent.

Through the US 2011/0074869 A1 a cleaning device is known in which cleaning agent is applied and sucked off at the same time.

Through the EP 1 040 924 A1 and the US 2013/0300800 A1 a printing unit is known which has print heads and a cleaning device with a movable cleaning module, the cleaning module having contact elements which can be brought into contact with a nozzle surface of the print heads by means of a positioning drive and which each have at least one lever body on this at least one at a first point Lever body are arranged. The respective lever body is mounted at a second point on a carrier and the adjusting drive is in contact with the at least one lever body at a third point.

Through the US 2004/0246296 A1 a printing unit is known which has a print head and a cleaning device with a movable cleaning module, the cleaning module has a contact element which can be brought into contact with a nozzle surface of the print head by means of an adjusting drive and wherein the contact element is arranged at a first location of a lever body on the latter and wherein the lever body is mounted at a second location on a carrier and wherein the adjusting drive is arranged at a third point of the lever body is in contact therewith and wherein the third point is arranged along the lever body between the first point and the second point.

Through the JP H06 8 461 A a printing unit is known which has a print head and at least one cleaning device with a movable cleaning module. The cleaning module has an immovable contact element. A dispensing device for cleaning agents can be aligned with a surface of the print head.

The invention is based on the object of creating a printing unit with at least one print head and at least one cleaning device.

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

A printing press has at least one printing unit. An advantage of the printing unit, the printing unit has at least one print head and at least one cleaning device with at least one movable cleaning module, wherein the at least one cleaning module preferably has at least one contact element, which by means of at least one adjusting drive, in particular from at least one spaced first relative position, with at least one The nozzle surface of the at least one print head can be brought into contact, for example, in particular in a contacting second relative position, and wherein the at least one contact element is preferably arranged at a first location of at least one lever body on this at least one lever body and the at least one lever body is arranged at a second location thereof at least one lever body is mounted on at least one carrier and the at least one adjusting drive is at least temporarily in contact with this at least one lever body at a third point of the at least one lever body and / or can be brought and wherein the third point is preferably arranged along the at least one lever body between the first point and the second point, has at least the advantage that the cleaning module can be made particularly compact. A compact design is particularly advantageous, particularly in connection with print heads which, for example, because of their alignment with a central cylinder, have overlapping target areas. A further advantage is that, due to this arrangement, the adjustment drive requires only a relatively small stroke compared to the adjustment path of the contact element and can therefore be made very compact even in one adjustment direction.

The adjustment direction is preferably determined in that the at least one contact element can be moved by means of the at least one adjustment drive in and / or against the adjustment direction towards the at least one nozzle surface and / or away from the at least one nozzle surface. The at least one nozzle surface is preferably a surface of the at least one print head that has a plurality of nozzles, in particular nozzle openings of nozzles of the at least one print head. The at least one printhead is preferably at least one inkjet printhead. The at least one carrier can also consist of several components that are rigidly arranged with respect to one another. Nevertheless, a corresponding set of components should apply as the at least one carrier.

The third point is preferably arranged between the first point and the second point, in particular in relation to a direction pointing from the first point to the second point. The at least one lever body is preferably designed to be elastic, that is to say in particular reversibly deformable and has its own restoring force. As a result, damage to the contact element and / or the print head, for example, can be avoided even in the event of malfunctions of an adjustment drive and / or if the adjustment path changes, because the lever body allows evasive movements of the at least one contact element. The adjusting drive can thus be designed particularly favorably as a pneumatic drive acting in only one direction, for example. Preferably, the at least one adjusting drive restricts the at least one lever body in its freedom of movement only counter to the adjusting direction, while the at least one lever body can be moved in at least one direction relative to each part of the adjusting drive. For example, the at least one adjusting drive and the at least one lever body are at least temporarily arranged and / or can be arranged at a distance from one another.

A dimension of the at least one lever body in the adjustment direction is preferably smaller than each dimension of the at least one lever body in each direction orthogonal to the adjustment direction. This also allows a compact structure and promotes its elastic properties. More preferably, the dimension of the at least one lever body in the adjustment direction is less than a tenth of each dimension of the at least one lever body in each direction orthogonal to the adjustment direction. The at least one lever body is therefore preferably designed as a restoring element, which at least when activated Adjusting drive is arranged to exert a force acting against the adjustment direction on the at least one adjusting drive.

The at least one contact element is preferably designed as at least one wiper, for example as at least one wiper blade. The wiper blade is designed, for example, as a profile made of at least one elastomeric material, preferably as at least one rubber profile.

The at least one cleaning module preferably has at least one first dispensing device for cleaning agents that is aligned and / or alignable, in particular with its dispensing opening, on the at least one print head and / or on the at least one contact element. The at least one cleaning module preferably has at least one gas outlet nozzle which is aligned and / or which can be aligned, in particular with its discharge opening, on the at least one print head and / or on the at least one contact element.

An advantage of a printing unit that has at least one print head and at least one cleaning device with at least one cleaning module, wherein the at least one print head and the at least one cleaning module are preferably arranged to be movable relative to one another in and / or against the cleaning direction and wherein preferably the at least one cleaning module is at least has a first dispensing device for cleaning agents that is aligned and / or alignable on the at least one print head, in particular on at least one nozzle surface of the at least one print head, and / or wherein the at least one cleaning module preferably has at least one on the at least one print head, in particular on the at least one nozzle surface of the has at least one gas outlet nozzle aligned and / or alignable with a print head, has at least the advantage that particularly gentle cleaning can be carried out. In addition, the separate application and removal of the cleaning agent creates the possibility of adapting the exposure time of the cleaning agent to the given circumstances.

The at least one cleaning module with the at least one carrier is preferably arranged movably by means of at least one cleaning drive in and / or against a cleaning direction relative to the at least one print head and preferably along several, for example at least three and preferably at least seven print heads. As a result, the number of cleaning modules and / or contact elements and / or adjusting drives to be used is less than the number of print heads, which in particular reduces acquisition costs. The cleaning direction is preferably oriented parallel to the at least one nozzle surface of the at least one print head, so that a simple relative movement can be implemented with simple means, for example a linear drive as a cleaning drive. The cleaning direction is preferably oriented orthogonally to a transport direction provided for a printing material. This offers the particular advantage that cleaning with only a few cleaning modules is possible in a simple manner even with such arrangements of print heads in which not all print heads have ejection directions parallel to one another, for example in those cases in which print heads are arranged around a central cylinder .

The at least one adjusting drive is preferably designed as at least one linear drive, for example as at least one cylinder with at least one cylinder piston, in particular as at least one fluid cylinder, for example at least one hydraulic cylinder and preferably at least one pneumatic cylinder. As an alternative or in addition, other types of drives are also possible, for example electrical and / or magnetic drives and / or drives that have rotors and / or stators. When a cylinder is mentioned, a corresponding piston movable therein is also meant in particular. For example, at least one single-acting and / or double-acting drive, in particular a cylinder, is used. At least one component of the at least one adjusting drive is preferably arranged in a stationary manner relative to the at least one carrier.

In addition to the at least one adjusting drive and the at least one lever body, at least one guide element, which is at least temporarily in contact with the at least one lever body and / or the at least one contact element, is preferably arranged, through which the adjustment direction of an adjustment path of the at least one contact element is predetermined. This enables an optimized adjustment movement of the at least one contact element. The at least one lever body is preferably connected to the at least one carrier at the second point such that it can be moved in at least one compensation direction and is mounted on the at least one carrier. This compensation direction has, for example, at least one component which is oriented orthogonally to the adjustment direction. As a result, it can be achieved that the at least one contact element follows the at least one guide element and not an arcuate movement that could occur with a fixed connection at the second point and with a very large adjustment path at the same time. Alternatively, the at least one lever body is firmly connected to the at least one carrier at the second point, in particular if the adjustment path is so short that the at least one contact body easily follows the guide element can without causing any difficulties due to any arcuate movements. The at least one guide element is preferably at least temporarily in contact with the at least one lever body and / or the at least one contact element at at least one fourth point, the at least one fourth point being closer to the first point than the second point and more preferably also closer than the third digit. The first point is preferably arranged between the third point and the fourth point.

The at least one cleaning module preferably has a plurality of contact elements, each of which is assigned its own adjusting drive and its own lever body. This ensures that print heads with different ejection directions can also be cleaned by means of a common cleaning module. Manufacturing costs and operating costs can thus be saved, in particular because fewer cleaning drives are necessary. Preferably, the plurality of adjusting drives can be activated simultaneously via at least one common, in particular pneumatic, supply line and / or each cleaning module has precisely one first delivery device. As a result, control devices such as valves can be saved. The plurality of contact elements are preferably arranged together with the at least one carrier, in particular so as to be movable relative to the at least one print head in and / or counter to the cleaning direction.

The at least one first dispensing device and / or the at least one gas outlet nozzle and / or the at least one cleaning module is preferably arranged so as to be movable relative to a frame of the at least one printing unit and relative to the at least one printing head. The at least one first dispensing device and / or the at least one gas outlet nozzle on the one hand and the at least one print head on the other hand are preferably arranged so as to be movable relative to one another. The at least one first dispensing device and the at least one gas outlet nozzle are preferably arranged on the at least one carrier, in particular on that carrier on which the at least one adjusting drive and / or the at least one lever body are also arranged.

The at least one first dispensing device is preferably designed as at least one first spray nozzle. More preferably, a dispensing opening of the at least one first dispensing device, in particular a spray opening with at least one component, faces the at least one outlet opening of the at least one gas outlet nozzle. More preferably, the dispensing opening of the at least one dispensing device with at least one component faces the at least one contact element. As a result, cleaning agent can be applied contactlessly at least to the at least one contact element.

The printing unit is preferably characterized in that the at least one cleaning module has at least one second dispensing device, in particular designed as a second spray nozzle, for, for example, at least partially liquid cleaning agent, which with its dispensing opening, in particular spray opening, is oriented and / or can be oriented away from the at least one print head is. At least partially liquid cleaning agent is also to be understood as meaning, in particular, completely liquid cleaning agent. The printing unit preferably has at least one collecting device, for example a collecting trough. Further preferably, the at least one second dispensing device is arranged with its dispensing opening, in particular spray opening, preferably oriented and / or alignable from above, pointing towards the at least one collecting device. The at least one second delivery device is preferably arranged so as to be movable relative to the at least one collecting device. This second dispensing device makes it possible in an advantageous manner to clean the collecting device without an operator having to intervene manually. As a result, the collecting device can always be kept clean without it being necessary to dismantle parts of the printing unit. This increases operational reliability because regular cleaning is possible without much effort.

The at least one gas outlet nozzle is preferably designed as a gas knife, in particular as an air knife. As a result, cleaning agents and / or soiling can be removed particularly effectively with low gas consumption. At least one, for example, convexly curved guide surface is preferably arranged in an exit direction of the at least one gas exit nozzle adjacent to at least one exit opening of the at least one gas exit nozzle. As a result, the exiting gas can be brought particularly close to the corresponding nozzle surface in a desired direction of movement. Preferably, a straight connection of one of the at least one outlet opening of the at least one gas outlet nozzle facing end of the curved guide surface with an end of this guide surface facing away from this at least one outlet opening points in a direction which has at least one component which, based on the cleaning direction of this at least one gas outlet nozzle which has at least one first delivery device. This results in particularly advantageous flow conditions.

The at least one first dispensing device and one outlet opening of the at least one gas outlet nozzle are preferably arranged at a distance from one another at least in the cleaning direction. This makes it possible to assign a common area of action to these two. If necessary, these can then act on an equal part of the at least one nozzle surface. With respect to the cleaning direction, the at least one contact element is further preferably arranged between the at least one first dispensing device and the at least one outlet opening of the at least one gas outlet nozzle. This makes it possible in particular to arrange this at least one contact body in the common area of action and to act on the at least one contact body both by means of the at least one dispensing device and by means of the at least one gas outlet nozzle. In this way, the at least one delivery device and the at least one gas outlet nozzle can be used to clean the at least one contact body.

A method for cleaning the at least one nozzle surface of the at least one printhead of the printing unit is particularly advantageous, the at least one first dispensing device of the at least one cleaning module arranged on a carrier being moved in the cleaning direction relative to the at least one printhead and thereby at least one at least partially liquid cleaning agent is applied to the at least one nozzle surface by means of the at least one first dispensing device and then, in a first removal process, the at least one gas outlet nozzle arranged on the carrier is moved in and / or against the cleaning direction relative to the at least one print head and in particular to remove at least the cleaning agent from the at least one nozzle surface from the at least one outlet opening of the at least one gas outlet nozzle at least one gas or gas mixture onto the at least one nozzle surface of the at least one printhead is ejected in a directional manner. This enables completely contactless cleaning of the nozzle surface. In particular, this reduces the risk of clogging the nozzles of the print head. As a result, cleaning of the nozzles themselves is unnecessary or at least greatly simplified.

For example, a coating agent, in particular ink, is then dispensed from at least one nozzle of the at least one print head assigned to the at least one nozzle surface in an exit process and then the at least one contact element, in particular fastened to the at least one carrier, is brought into contact, for example, with the nozzle surface, and in particular in a peeling process then moved in contact with the at least one nozzle surface relative to the at least one printhead in and / or against the cleaning direction and thereby at least partially removes the coating agent released in the exit process from the at least one nozzle surface. As a result, the nozzles of the printhead can nevertheless be cleaned without it being necessary to convey cleaning agent through the nozzles in any direction. Preferably, the method is further characterized in that, in particular afterwards, in a rinsing process, the at least one second dispensing device of the at least one cleaning module arranged on the carrier is moved in and / or against the cleaning direction relative to the at least one print head and thereby at least partially dispenses liquid cleaning agent the at least one second dispensing device is dispensed in particular in a direction pointing away from the at least one nozzle surface towards the collecting device preferably arranged at least partially below the at least one nozzle surface.

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

• 1a eine schematische Darstellung einer Rollen-Druckmaschine;
• 1b eine schematische Darstellung einer Rollen-Druckmaschine mit alternativer Bahnführung;
• 2 eine schematische Darstellung eines Teils einer Druckeinheit mit einer Doppelreihe von Druckköpfen;
• 3 eine schematische Darstellung einer Druckeinheit mit mehreren Düsenbalken, deren Druckköpfe in Druckpositionen angeordnet sind;
• 4 eine schematische Darstellung einer Druckeinheit mit mehreren Düsenbalken, deren Druckköpfe in Ruhepositionen, insbesondere Wartungspositionen angeordnet sind, wobei Positionierantriebe der Übersichtlichkeit halber unterbrochen dargestellt sind;
• 5 eine schematische Darstellung eines Teils einer Reinigungsvorrichtung;
• 6 eine schematische Darstellung eines Teils einer Reinigungsvorrichtung und eines Druckkopfs;
• 7 eine schematische Darstellung eines Teils einer Reinigungsvorrichtung;
• 8 eine schematische Darstellung einer Reinigungsvorrichtung gemäß einem Schnitt entlang der Linie VIII in 5;
• 9 eine schematische Darstellung einer alternativ ausgebildeten Reinigungsvorrichtung in einer Darstellung analog derjenigen aus 8.

Show it:

• 1a a schematic representation of a web printing machine;
• 1b a schematic representation of a web printing machine with an alternative web guide;
• 2 a schematic representation of part of a printing unit with a double row of print heads;
• 3 a schematic representation of a printing unit with a plurality of nozzle bars, the print heads of which are arranged in printing positions;
• 4th a schematic representation of a printing unit with a plurality of nozzle bars, the print heads of which are arranged in rest positions, in particular maintenance positions, positioning drives being shown interrupted for the sake of clarity;
• 5 a schematic representation of part of a cleaning device;
• 6th a schematic representation of part of a cleaning device and a print head;
• 7th a schematic representation of part of a cleaning device;
• 8th a schematic representation of a cleaning device according to a section along the line VIII in 5 ;
• 9 a schematic representation of an alternatively designed cleaning device in a representation analogous to that of FIG 8th .

A printing press 01 has, for example, at least one source of printing material 100 , at least a first printing unit 200 , preferably at least a first dryer 301 , preferably at least one second printing unit 400 and preferably at least a second dryer 331 and preferably at least one post-processing device 500 on. The printing press 01 is also preferred as an inkjet printing machine 01 educated. The printing press is preferred 01 as a web printing machine 01 designed, more preferably as a roll inkjet printing machine 01 . The printing press 01 is for example as a rotary printing press 01 designed, for example as a web-fed rotary printing machine 01 , especially web-fed rotary inkjet printing machine 01 . In the case of a web press 01 is the substrate source 100 for example as a roll unwinding device 100 educated. In the case of a sheet-fed printing press or a sheet-fed rotary printing machine, the printing material is the source 100 for example designed as a sheet feeder. In the substrate source 100 at least one substrate is preferred 02 aligned, preferably with respect to at least one edge of this printing material 02 . The substrate 02 is for example at least one web-like printing material 02 , i.e. a substrate web 02 , for example a paper web 02 or a textile web 02 or a slide 02 , for example a plastic film 02 or a metal foil 02 . One axial direction A. is preferably one direction A. that are parallel to an axis of rotation 111 a substrate roll 101 and / or to an axis of rotation 207 ; 407 at least one central cylinder 201 ; 401 and / or to an axis of rotation one in the first printing unit 200 arranged printing substrate guide element extends.

A transport route for the at least one printing material 02 and in particular the substrate web 02 runs after the at least one printing material source 100 preferably by the at least one first printing unit 200 where the substrate 02 and in particular the substrate web 02 preferably by means of at least one coating agent, in particular at least one ink and / or printing ink, at least on one side and preferably in connection with the at least one second printing unit 400 is preferably provided with at least one print image on both sides.

After passing the at least one first printing unit 200 runs through the transport route of the printing material 02 and in particular the substrate web 02 for example the at least one first dryer 301 to dry the applied ink and / or printing ink. In the foregoing and in the following, ink and / or printing ink are generally understood to mean a coating agent, in particular also a lacquer. The at least one first dryer is preferred 301 Part of a dryer unit 300 .

The following is a web press 01 described in more detail. Corresponding details can also be applied to other printing machines 01 , for example sheet-fed printing machines, provided that they do not contradict this. Printing material rolls 101 that is preferred in the roll unwinding device 100 are used, each preferably have a sleeve on which the web-shaped printing material 02 for use in web printing machines 01 is wound up. The substrate web 02 preferably has a width of 700 mm to 2000 mm, but can also have an arbitrarily smaller or preferably larger width.

A working width of the printing machine 01 is a dimension that is preferably orthogonal to the intended transport path of the printing material 02 by the at least one first printing unit 200 extends, more preferably in the axial direction A. . The working width of the printing machine 01 preferably corresponds to a maximum width that a printing material 02 may have to still use the printing press 01 to be processed, so a maximum with the printing machine 01 processable substrate width.

The first printing unit 200 is preferred to the roll unwinding device 100 regarding the transport route of the printing material 02 subordinate. The first printing unit 200 has, for example, at least one first central pressure cylinder 201 or short central cylinder 201 on. If in the following from a central cylinder 201 the question is, there is always a central printing cylinder 201 meant. The substrate web 02 preferably wraps around the first central cylinder in a printing operation 201 at least partially. An angle of wrap is preferably at least 180 ° and more preferably at least 270 °. The wrap angle is the angle measured in the circumferential direction of a cylinder jacket surface of the first central cylinder 201 along which the substrate 02 and in particular the substrate web 02 with the first central cylinder 201 is in contact. The substrate web 02 wraps around, for example, part of a first deflection roller 203 and is deflected by this in such a way that the transport path of the printing substrate web 02 in a first gap 204 both tangential to the first deflection roller 203 as well as tangential to the first central cylinder 201 runs.

At least one, as the first impression roller, is preferred 206 trained first cylinder 206 in the first printing unit 200 arranged. In one of the first central cylinder 201 the first impression roller is in the engaged state 206 preferably together with the first central cylinder 201 a first impression gap 209 . The first central cylinder 201 preferably has its own, the first central cylinder 201 associated first drive motor 208 on, which is preferred as an electric motor 208 is designed and which is more preferably as a direct drive 208 and / or single drive 208 of the first central cylinder 201 is trained.

On the first drive motor 208 of the first central cylinder 201 and / or on the first central cylinder 201 a first angle-of-rotation sensor is preferably arranged itself, which shows a position of the angle of rotation of the first drive motor 208 and / or the first central cylinder 201 self-measuring and / or capable of measuring and is designed to be able to transmit and / or transmit to a higher-level machine control. The first angle of rotation sensor is designed, for example, as a rotary encoder or an absolute value encoder. A rotational position of the first drive motor is provided with such a rotational angle sensor 208 and / or preferably a rotational position of the first central cylinder 201 preferably absolutely determinable by means of the higher-level machine control.

In addition or as an alternative, there is the first drive motor 208 of the first central cylinder 201 In terms of circuitry, connected to the machine control in such a way that the machine control is sent to the first drive motor on the basis of the machine control 208 of the first central cylinder 201 predetermined target data for a rotational position of the first drive motor 208 at any time via the rotary position of the first drive motor 208 and thus at the same time the rotary position of the first central cylinder 201 is informed.

Within the first printing unit 200 is at least a first printing unit 211 arranged. At least a first printing unit 211 is preferably in the direction of rotation of the first central cylinder 201 and thus along the transport path of the substrate web 02 after the first impression roller 206 preferably on the at least one first central cylinder 201 arranged acting and / or acting and / or aligned and / or alignable. At least a first printing unit 211 is preferred as a first inkjet print engine 211 trained and is also the first ink-jet printing unit 211 called. At least a first printing unit 211 preferably has at least one nozzle bar 213 and more preferably a plurality of nozzle bars 213 on. At least a first printing unit 211 and thus the at least one first printing unit 200 preferably has the at least one first print head 212 on, which is preferred as an inkjet printhead 212 is trained. The at least one nozzle bar preferably has 213 at least one printhead each 212 and preferably multiple printheads each 212 on. Any printhead 212 preferably has a plurality of nozzles, from which drops of coating agent, in particular drops of ink and / or drops of printing ink, are ejected and / or can be ejected. The nozzles preferably end in nozzle openings as a nozzle surface 232 trained area 232 of the respective at least one print head 212 . A nozzle face 232 is preferably a surface having a plurality of nozzles, in particular nozzle openings of nozzles 232 of the at least one printhead 212 .

A nozzle bar 213 is a component that moves in the axial direction A. preferably over at least 80% and more preferably at least 100% of the working width of the printing machine 01 extends and that as a carrier of the at least one print head 212 serves. An axial length of a barrel of the at least one first central cylinder is preferred 201 at least as large as the working width of the printing machine 01 .

There is one or more nozzle bars 213 per printing unit 211 arranged. Each nozzle is preferably a clearly defined target area on the direction A. the width of the substrate web 02 and preferred to the direction A. especially the axis of rotation 207 of the at least one first central cylinder 201 related assigned. Each target area of a nozzle is preferred, in particular in relation to the circumferential direction of the at least one first central cylinder 201 at least clearly defined in the printing company. In particular, a target area of a nozzle is that, in particular, essentially straight spatial area which extends in an ejection direction of this respective nozzle from this respective nozzle.

The at least one first nozzle bar 213 extends preferably orthogonally to the intended transport path of the printing material 02 preferably across the working width of the printing machine 01 . The at least one nozzle bar 213 preferably has at least one row of nozzles. The at least one row of nozzles faces in the axial direction A. viewed preferably over the entire working width of the printing machine 01 and / or width of the barrel of the at least one first central cylinder 201 nozzle openings at regular intervals, for example. In one embodiment, this is a single continuous printhead 212 arranged in the axial direction A. across the entire working width of the printing machine 01 and / or the entire width of the barrel of the at least one first central cylinder 201 extends. The at least one row of nozzles is preferred as at least a linear one that extends over the entire width of the substrate web 02 in the axial direction A. extending juxtaposition of individual nozzles. In another preferred embodiment they are in the axial direction A. several printheads next to each other 212 on the at least one nozzle bar 213 arranged. Since usually such individual printheads 212 are not provided with nozzles up to one edge of their housing, preferably at least two and more preferably exactly two are in the axial direction A. extending rows of printheads 212 in the circumferential direction of the first central cylinder 201 arranged offset to one another, preferably so that in the axial direction A. consecutive printheads 212 preferably one of the at least two rows of print heads alternately 212 belong, preferably always alternating between a first and a second of two rows of print heads 212 . Two such rows of printheads 212 form a double row of printheads 212 . Any double row of printheads 212 for example, has between five and twenty-five printheads 212 and more preferably seven or fourteen printheads 212 on. The at least one row of nozzles is preferably not designed as a single linear row of nozzles, but results from the sum of several individual, more preferably two, rows of nozzles arranged offset from one another in the circumferential direction.

Assigns a printhead 212 If there are several nozzles, then all of the target areas of the nozzles of this printhead form 212 together a working area of this printhead 212 . Working areas of printheads 212 of a nozzle bar 213 and in particular a double row of printheads 212 limit in the axial direction A. viewed on each other and / or overlap in the axial direction A. seen. This is also the case with in the axial direction A. discontinuous printhead 212 ensured that in the axial direction A. target areas of nozzles of the at least one nozzle bar viewed at regular and preferably periodic intervals 213 and / or in particular each double row of printheads 212 lie. In any case, an entire working area of the at least one nozzle bar extends 213 preferably over at least 90% and more preferably 100% of the working width of the printing machine 01 and / or the entire width of the barrel of the at least one first central cylinder 201 in the axial direction A. . On one or both sides with respect to the axial direction A. can be a narrow area of the substrate web 02 and / or the ball of the first central cylinder 201 be present that is not in the working area of the nozzle bar 213 listened to. An entire working area of the at least one nozzle bar 213 is preferred from all work areas of printheads 212 this at least one nozzle bar 213 and is preferably composed of all target areas of nozzles of these printheads 212 this at least one nozzle bar 213 composed. An entire working area preferably corresponds to a double row of print heads 212 in the axial direction A. seen the working area of the at least one nozzle bar 213 .

The at least one nozzle bar preferably has 213 in the circumferential direction with respect to the at least one first central cylinder 201 and / or in one for the printing material 02 intended transport direction B. several rows of nozzles. Each printhead preferably has 212 a plurality of nozzles, which are more preferably in a matrix of several rows in the axial direction A. and / or a plurality of columns, preferably in the circumferential direction of the at least one first central cylinder 201 are arranged. Columns of this type are further preferably arranged to run obliquely to the circumferential direction, for example in order to increase the resolution of a print image. Preferably, a row of nozzles and a column of nozzles each enclose an angle different from 90 °. Preferred are in a direction orthogonal to the axial direction A. , especially in the direction of transport B. along the intended transport path of the printing material 02 and / or in the circumferential direction based on the at least one central cylinder 201 multiple rows of printheads 212 , more preferably four double rows and even more preferably eight double rows of print heads 212 arranged one after the other.

Here are the printheads 212 at least in the printing operation preferably aligned such that the nozzles of each print head 212 essentially in the radial direction onto the cylinder jacket surface of the at least one first central cylinder 201 point. Deviations from radial directions within a tolerance range of preferably not more than 10 ° and more preferably not more than 5 ° should be considered to be essentially radial directions. This means that the at least one on the lateral surface of the at least one first central cylinder 201 aligned printhead 212 with respect to the axis of rotation 207 of the at least one first central cylinder 201 in a radial direction onto the lateral surface of the at least one first central cylinder 201 is aligned. This radial direction is one on the axis of rotation 207 of the at least one first central cylinder 201 related radial direction. Each double row of printheads 212 an ink and / or printing color is preferably assigned and / or assignable to a specific color, for example one of the colors black, cyan, yellow and magenta or a lacquer, for example a clear lacquer. The corresponding inkjet printer 211 is preferred as a multi-color printing unit 211 , especially four-color printing unit 211 formed and enables a one-sided multicolored, in particular four-colored Printing of the substrate web 02 . It is also possible to have fewer or more different colors with one printing unit 211 to print, for example additional special colors. In one embodiment, at least in the printing mode, there are multiple rows of printheads 212 , more preferably four double rows and even more preferably eight double rows of print heads 212 arranged one after the other aligned on at least one surface of at least one transfer body, for example at least one transfer cylinder and / or at least one transfer belt.

The at least one printhead 212 works to generate drops of coating agent preferably according to the drop-on-demand method, in which drops of coating agent are specifically generated when required, in particular in a selectable drop size (amplitude modulation). At least one piezo element is preferably used per nozzle, which, when a voltage is applied and / or an applied voltage is changed, can reduce a volume filled with coating agent at high speed by a certain proportion. As a result, coating agent is displaced, which is ejected through a nozzle connected to the volume filled with coating agent and forms at least one drop of coating agent. It is also possible to use at least one heating element per nozzle which generates a gas bubble in a volume filled with coating agent at high speed by evaporating the coating agent. With the drop-on-demand method, it is possible to set a target position of the respective drop of coating agent on the moving substrate web 02 with respect to the circumferential direction of the at least one first central cylinder 201 solely by an emission time of the respective drop of coating agent and a rotation speed of the first central cylinder 201 and / or by the rotational position of the first central cylinder 201 to be determined.

The nozzles of the at least one print head 212 are arranged in such a way that a distance between the nozzles and the one on the cylinder jacket surface of the at least one first central cylinder 201 arranged printing substrate web 02 at least when the print head is arranged in a printing position 212 is preferably between 0.5 mm and 5 mm and more preferably between 1 mm and 1.5 mm. The high angular resolution and / or the high sampling frequency of the angle of rotation sensor and / or the high accuracy of the predetermined by the machine control and by the first drive motor 208 of the first central cylinder 201 processed target data for the rotational position of the first drive motor 208 of the first central cylinder 201 enables a very precise determination of the position and / or knowledge of the position of the printing substrate web 02 relative to the nozzles and their target areas. A drop flight time between the nozzles and the substrate web 02 is for example through a learning process and / or through the known distance between the nozzles and the substrate web 02 and a known drop velocity is known. From the angular position of the at least one first central cylinder 201 and / or the first drive 208 of the at least one first central cylinder 201 , the speed of rotation of the at least one first central cylinder 201 and the time of flight of the drops, an ideal point in time for ejecting a respective drop is determined, so that images of the web of printing material in accordance with register and / or register 02 is achieved.

In a regular printing operation, all print heads are 212 fixed in place. This ensures that all nozzles are permanently aligned and / or correctly aligned. There are different situations in which there is movement of the printheads 212 necessary is. A first such situation is an on-the-fly roll change or, in general, a roll change with a gluing process or, in general, a web draw-in with a thicker part of the web to be drawn in. The at least one nozzle bar 213 is therefore in at least one adjusting direction and / or along at least one adjusting path relative to the axis of rotation 207 of the at least one first central cylinder 201 and / or the intended transport route for the printing material 02 moveable. In this way, the distance can be increased sufficiently, but must then be reduced again accordingly. A second such situation arises, for example, during installation and / or maintenance and / or cleaning and / or replacement of at least one of the print heads 212 . The printheads 212 are preferably individually on the at least one nozzle bar 213 attached and individually from the at least one nozzle bar 213 solvable. This allows individual printheads 212 serviced and / or cleaned and / or replaced.

The printing press 01 preferably has at least one printing unit 200 ; 400 on, wherein the at least one printing unit 200 ; 400 at least one, preferably one having an ejection direction, as an inkjet printhead 212 ; 412 trained printhead 212 ; 412 and preferably several, preferably each having an ejection direction, as inkjet printheads 212 ; 412 trained print heads 212 ; 412 and preferably at least one about a respective axis of rotation 207 ; 407 rotatable substrate guide element 201 ; 401 has, by means of which preferably at least one for preferably web-shaped printing material 02 intended transport path is at least partially determined and / or can be determined.

Is preferred the at least one printing substrate guide element 201 ; 401 within the at least one printing unit 200 ; 400 arranged and / or is the at least one printing substrate guide element 201 ; 401 as at least one web guide roller and / or one deflection roller 203 ; 312; 403 and / or as at least one central printing cylinder 201 ; 401 and / or designed as at least one transmission body.

The at least one print head is preferred 212 with at least one positioning device 217 ; 218 ; 219 ; 221 connected and / or connectable. The at least one print head is further preferred 212 permanently with the at least one positioning device 217 ; 218 ; 219 ; 221 connected and only for assembly purposes and / or disassembly purposes and / or to replace the at least one print head 212 of the at least one positioning device 217 ; 218 ; 219 ; 221 separable. At least one of at least two print heads is preferred 212 further preferably by means of a positioning device assigned to it 217 optionally can be arranged at least either in a printing position assigned to it or in at least one rest position assigned to it.

A print head arranged in its printing position is preferred 212 characterized in that at least one nozzle of the at least one print head 212 of a designated transport route for printing material 02 and / or from the printing material 02 and / or from a transfer body and / or from the printing substrate guide element 201 ; 401 has a distance which is at most 5 mm and more preferably at most 1.5 mm and / or which is preferably at least 0.5 mm and more preferably at least 1 mm.

The at least one print head is preferred 212 in particular by means of the at least one positioning device 217 ; 218 ; 219 ; 221 can be arranged in at least one rest position and more preferably in at least two different rest positions. The at least one rest position is designed, for example, as at least one maintenance position and / or as at least one assembly position. A maintenance position is preferably a position in which the at least one print head 212 can be serviced, for example cleaned and / or aligned and / or can be stored in a state that is in particular secured against contamination and / or drying out, in particular without the at least one print head 212 from the printing press 01 and / or the at least one printing unit 200 ; 400 refer to. A mounting position is preferably a position in which the at least one print head 212 from the printing press 01 and / or the at least one printing unit 200 ; 400 and / or the at least one nozzle bar 213 removed and / or in the printing machine 01 and / or the at least one printing unit 200 ; 400 and / or the at least one nozzle bar 213 can be used. In particular, more space is preferably available to an operator in the assembly position to access the at least one print head 212 to arrive, while in the maintenance position there is preferably only sufficient space available for internal, in particular automatically running processes within the printing press 01 to be able to carry out, for example a cleaning of a nozzle surface 232 at least one printhead 212 .

The respective maintenance positions of the print heads are preferably identified 212 characterized in that different printheads arranged in their respective maintenance positions 212 have different distances from one another than in their respective printing positions and / or in their respective mounting positions.

In a preferred embodiment, the at least one positioning device has 217 ; 218 , 219 ; 221 at least one positioning guide 224 and more preferably a plurality of positioning guides 224 and even more preferably one positioning guide in each case 224 per movable nozzle bar 213 and / or per movable printhead 212 on. The at least one positioning device 217 ; 218 , 219 ; 221 preferably has at least one positioning drive 226 and more preferably several positioning drives 226 and even more preferably one positioning drive each 226 per movable nozzle bar 213 on. For example, everyone is positioning guide 224 one positioning drive each 226 assigned. The at least one positioning drive 226 is for example as at least one electric motor 226 and / or as at least one hydraulic cylinder 226 and / or preferably as at least one pneumatic cylinder 226 educated. The at least one positioning drive is preferred 226 arranged such that it has the at least one print head 212 can optionally move into its printing position or its maintenance position or its assembly position.

At least four positioning devices are preferably arranged, by means of which in each case at least one nozzle bar 213 and / or in particular a plurality of print heads each assigned to the same printing color 212 are designed to be movable together. In particular, this can be used to provide configurations in which the print heads 212 at least one nozzle bar 213 and / or at least one printing ink are arranged in their printing position, while the print heads 212 at least one other nozzle bar 213 and / or another printing ink are arranged in a rest position, for example a maintenance position. This means, for example, that all print heads 212 one printing color, for example black, while activating all of the printheads 212 other inks are held in a maintenance position and there protected from drying out and / or cleaned, for example, by suitable means.

At least one first locking element is preferably arranged, for example at least one pressure stop. The at least one print head is preferably by means of the at least one first locking element 212 can be determined in its printing position, for example by the at least one positioning drive 226 , especially pneumatic cylinders 226 , the at least one printhead 212 and / or the at least one print head 212 having nozzle bars 213 pulls and / or presses against the at least one pressure stop. This ensures that the printing position is reproducible and precisely defined.

At least one second locking element is preferably arranged, for example at least one maintenance stop. The at least one print head is preferably by means of the at least one locking element 212 fixable in its maintenance position, for example by the at least one positioning drive 226 , especially pneumatic cylinders 226 , the at least one printhead 212 and / or the at least one print head 212 having nozzle bars 213 pulls and / or presses against the at least one maintenance stop. This ensures that the maintenance position is reproducible and precisely defined.

At least one locking element, preferably at least one maintenance stop, is preferably designed to be movable in order to move between extreme positions of an adjustment path of the at least one print head 212 and / or the at least one nozzle bar 213 , in particular to enable between the printing position and the assembly position. At least one is preferred as a cleaning device 222 trained maintenance device 222 designed as at least one movable stop, in particular as a maintenance stop.

At least one cleaning device is preferably in the at least one maintenance position 222 at least one nozzle of the at least one print head 212 ; 412 assigned and / or assignable and is further preferably the at least one cleaning device 222 at least one nozzle of the at least one print head 212 ; 412 at least partially arranged and / or can be arranged opposite one another with respect to a respective ejection direction of the at least one nozzle.

A position of these respective at least one nozzle preferably differs when the print head is arranged in the at least one printing position 212 and a position of this respective at least one nozzle when the printhead is arranged in the at least one maintenance position and / or assembly position 212 on the through the axis of rotation 207 ; 407 of the at least one, preferably as a central cylinder 201 trained printing substrate guide element 201 ; 401 specified axial direction A. based on at most 50%, more preferably at most 20% and even more preferably at most 10% and even more preferably at most 2% of one in the axial direction A. measured width of a working area of the at least one printhead 212 ; 412 having nozzle bar 213 and / or at most 50% and more preferably at most 20% and even more preferably at most 10% and even more preferably at most 2% of the maximum with the printing machine 01 processable printing material width specified working width of the printing machine 01 . In an alternative embodiment, the at least one print head 212 for this at least parallel to the axial direction A. moves and differ the position of these respective at least one nozzle when the printhead is arranged in the at least one printing position 212 and the position of this respective at least one nozzle when the print head is arranged in the at least one maintenance position and / or assembly position 212 on the through the axis of rotation 207 ; 407 of the at least one, preferably as a central cylinder 201 trained printing substrate guide element 201 ; 401 specified axial direction A. relative to at least 100% that in the axial direction A. measured width of the working area of the at least one print head 212 ; 412 having nozzle bar 213 and / or at least 100% of the through a maximum with the printing machine 01 processable printing material width specified working width of the printing machine 01 .

It is preferred when the print head is arranged in the at least one maintenance position 212 at least one cleaning device 222 between at least one nozzle of the at least one print head 212 ; 412 and one of these at least one nozzle area closest to the area for the printing material 02 provided transport path can be arranged and / or arranged and / or is arranged in the at least one maintenance position of the print head 212 at least one cleaning device 222 between at least one nozzle of the at least one print head 212 and can be arranged and / or arranged in a region of a transmission body that is closest to said at least one nozzle.

The at least one cleaning device 222 preferably has an extent in each spatial direction that is greater than 10 cm, more preferably greater than 15 cm. The at least one cleaning device preferably has 222 in the axial direction A. one Expansion that is at least as large as the working area of the at least one nozzle bar 213 in the axial direction A. . The at least one cleaning device preferably has 222 in one transport direction of the printing material 02 an extension that is at least as large as the working area of the at least one nozzle bar 213 in the direction of transport of the printing material 02 . This means that preferably all nozzles of all print heads can 212 of the at least one nozzle bar 213 can be cleaned in one operation. In an alternative embodiment, the at least one cleaning device has 222 in the direction of transport of the printing material 02 an expansion that is at least as large as all working areas of all nozzle bars 213 of the printing unit 211 in the direction of transport of the printing material 02 put together. As a result, all nozzles of all print heads can then 212 of the at least one printing unit 211 can be cleaned in one operation.

The at least one nozzle bar 213 is preferably completely independent of such components of the printing machine 01 movable that the substrate web 02 touching and / or the intended transport route of the printing material 02 are arranged tangentially. Cleaning and / or maintenance can thus be carried out without the printing substrate web 02 to influence and especially without the substrate web 02 from the printing press 01 to have to remove.

The at least one cleaning device is preferred 222 at least orthogonal to the axial direction A. moveable. A supply path of the at least one cleaning device is preferred 222 by at least one feed device 223 set. The at least one feed device is preferred 223 as at least a guidance system 223 educated. The at least one cleaning device is preferred 222 arranged movably along the at least one supply path between at least one parking position and at least one deployment position. Preferably, the further preferably has through the at least one feed device 223 defined supply path of the at least one cleaning device 222 no component in the axial direction A. which is greater than at most 50%, more preferably at most 20%, even more preferably at most 10%, and even more preferably at most 2% of that in the axial direction A. measured width of the working area of the at least one print head 212 having nozzle bar 213 and / or at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of the maximum with the printing machine 01 processable printing material width specified working width of the printing machine 01 . A distance of the axial movement of the at least one cleaning device is preferred 222 at most 50%, more preferably at most 20%, even more preferably at most 10%, and even more preferably at most 2% of that in the axial direction A. measured width of the working area of the at least one print head 212 ; 412 having nozzle bar 213 and / or at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of the maximum with the printing machine 01 processable printing material width specified working width of the printing machine 01 . The at least one cleaning device is also preferred 222 exclusively orthogonal to the axial direction A. moveable. In an alternative embodiment, the at least one cleaning device is 222 arranged movably in the axial direction along the at least one provision path between the at least one parking position and the at least one use position.

One preferably differentiates between the axial direction A. related intended position of the at least one cleaning device 222 in their parking position moves from one to the axial direction A. related intended position of the at least one cleaning device 222 in their use position by at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of one in the axial direction A. measured width of a working area of the at least one printhead 212 having nozzle bar 213 and / or at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% one through a maximum with the printing machine 01 processable printing material width specified working width of the printing machine 01 .

The at least one feed device preferably has 223 at least one feed drive 229 and / or at least one traction device 228 and / or pushing means 228 on. In one embodiment, the at least one feed drive is 229 stationary on a frame 331 the at least one printing unit 200 ; 400 arranged and is the at least one traction means 228 and / or pushing means 228 with the at least one cleaning device 222 connected and relative to the frame 231 the at least one printing unit 200 ; 400 designed to be movable, for example as a chain 228 . In an alternative embodiment, there is at least one feed drive 229 in particular together with the at least one cleaning device 222 movably arranged and is the at least one traction means 228 and / or pushing means 228 Arranged stationary and, for example, as at least one rail 228 and / or rack 228 educated. The at least one feed drive preferably has 229 at least one stepper motor.

At least one print head is preferred 212 and more preferably any printhead 212 assigned a clear maintenance item. If the at least one cleaning device 222 in is arranged in its position of use, it preferably serves as a locking element, for example in the form of at least one maintenance stop. The corresponding printhead 212 having nozzle bars 213 with the printhead in its maintenance position 212 preferably by applying a force by means of the at least one positioning drive 226 and / or by gravity, especially when the positioning drive is switched off 226 pulled and / or pressed against the cleaning device. This clearly defines the maintenance position. In this way, one positioning drive is sufficient 226 and a feed drive 229 to the printheads 212 to be able to arrange reproducible and precise in their printing positions, maintenance positions and assembly positions.

Each maintenance position is preferably at least one print head 212 a clear use position of at least one cleaning device 222 assigned. The at least one cleaning device is preferred 222 as at least a protective cover 222 formed, more preferably by means of together with the at least one print head 212 ; 412 a closed volume can be limited. A total of four nozzle bars are preferred 213 a printing unit 200 ; 400 a total of four cleaning devices 222 arranged, each of which has at least one area which is used as a protective cover and / or which can also be used as a cleaning area.

It is preferred if at least one printhead is arranged in the printing position 212 at least one nozzle of this at least one print head 212 is arranged below the supply path, along which the at least one cleaning device 222 preferably by means of the at least one feed device 223 is preferably arranged movably between the at least one parking position and the at least one use position. It is preferred when at least one print head is arranged in the rest position 212 this at least one nozzle is arranged above this supply path.

A travel range of at least one print head 212 is preferably a predetermined path, for example, along which the at least one print head 212 is movable, in particular around the at least one print head 212 to move between its printing position and its rest position, for example maintenance position and / or assembly position. The adjustment path of the at least one print head preferably has 212 no component in the axial direction A. which is greater than at most 50%, more preferably at most 20%, even more preferably 10%, and even more preferably at most 2% of that in the axial direction A. measured width of the working area of the at least one print head 212 having nozzle bar 213 and / or at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of the maximum with the printing machine 01 processable printing material width specified working width of the printing machine 01 .

For cleaning the at least one nozzle surface of the at least one print head 212 is the at least one cleaning device 222 intended. The at least one cleaning device 222 preferably has at least one cleaning module 150 and preferably at least one collecting device 161 , especially a drip pan 161 on. This is preferably at least one cleaning module 150 relative to the at least one drip pan 161 movably arranged. The at least one cleaning device is preferred 222 as a whole relative to the at least one printhead 212 movably arranged, in particular during the cleaning device 222 is arranged in the maintenance position and remains. This is preferably at least one cleaning module 150 so in particular at least one cleaning module 150 for cleaning the at least one nozzle surface 232 of the at least one printhead 212 . The at least one cleaning module 150 is preferably permanent as part of the first printing unit 211 and / or at least a second printing unit 411 educated. At least one printing unit 211 ; 411 has at least one printhead 212 ; 412 and the at least one cleaning device 222 with the at least one cleaning module 150 on.

The at least one cleaning module 150 preferably has at least one contact element 151 on, by means of at least one adjusting drive 152 in particular from at least one spaced apart first relative position with the at least one nozzle surface 232 of the at least one printhead 212 ; 412 can be brought into contact, in particular in a contacting second relative position. The at least one contact element 151 is preferred as at least one wiper 151 or puller 151 formed, for example as at least one wiper blade 151 . A wiper 151 or puller 151 is a component that serves to remove material from this surface by a movement that maintains contact between this component and a surface, for example by pushing it away and / or pulling it off and / or sucking it up. A wiper blade 151 preferably extends in at least one direction over a length of several centimeters, for example 20 mm (twenty millimeters) to 30 mm (thirty millimeters) and more preferably over an entire extent of the through the respective wiper blade 151 surface to be cleaned 232 in this direction.

This is preferably at least one contact element 151 arranged in such a way that it is connected to the at least one nozzle surface 232 of the at least one printhead 212 can be brought in and out of contact. This is preferably done by means of the at least one adjusting drive 152 and / or in and / or against a setting direction E. . The direction of incidence E. is preferably a direction in and / or against that of the at least one adjusting drive 152 is able to exert a force and / or in and / or against which the at least one contact element 151 is arranged movably. In particular, this is at least one contact element 151 by means of the at least one adjusting drive 152 in and / or against the setting direction E. moveable. A vertical component of the respective pitch direction E. is preferably greater than any horizontal component of the respective adjustment direction that may be present E. . The respective adjustment direction preferably deviates E. by less than 45 °, more preferably less than 30 ° and even more preferably less than 20 ° from a vertical direction. With regard to mobility in and / or against a specific direction, for example the setting direction E. it should be noted that the variant defined by the word “and” is applicable at least in those cases in which the corresponding component is not in any end position of its possible adjustment path. In particular, it is possible that end positions or middle positions allow movements in one or two directions or that a preload can exist in one direction and a corresponding drive acts in the other direction or that there is no preload, but at least a two-way drive.

It preferably has at least one cleaning module 150 at least one lever body 153 on and more preferably exactly one lever body 153 per actuator 152 and / or exactly one lever body 153 per contact element 151 . The at least one actuator 152 preferably does not act directly with the at least one contact element 151 together, but indirectly via the at least one lever body 153 . The at least one lever body 153 is also preferred as a wiper support 153 designated. The at least one lever body is preferred 153 with regard to the setting direction E. between the at least one printhead 212 and the at least one adjusting drive 152 arranged. This is preferably at least one contact element 151 at a first point of the at least one lever body 153 at least one lever body on this 153 arranged, more preferably attached. The at least one lever body is preferred 153 at a second point this at least one lever body 153 on at least one carrier 154 of the at least one cleaning module 150 stored. If in the preceding and in the following by at least one carrier 154 When talking about it, this also means an assembly of carrier elements which are rigidly arranged relative to one another and which together form the at least one carrier 154 form. The at least one adjusting drive is preferably stationary 152 at least temporarily at a third point of the at least one lever body 153 with this at least one lever body 153 in contact and / or is the at least one adjusting drive 152 at least temporarily at the third point of the at least one lever body 153 with this at least one lever body 153 brought into contact. The third point along the at least one lever body is preferred 153 arranged between the first location and the second location. In particular, there is contact between the adjusting drive 152 and lever body 153 between the connection of the at least one lever body 153 with the at least one contact element 151 on the one hand and the connection of the at least one lever body 153 with the at least one carrier 154 on the other hand.

The at least one lever body 153 preferably consists of at least one elastic material. In particular, the at least one lever body is 153 preferably reversibly deformable and has at least one lever body 153 prefers to have its own restoring force. The at least one lever body is preferred 153 than at least a spring sheet 153 educated. For example, a dimension of the at least one lever body 153 in the pitch direction E. is less than each dimension of the at least one lever body 153 in each to the pitch direction E. orthogonal direction. In relation to a direction pointing from the first point to the second point, the third point is preferably arranged between the first point and the second point.

At least one component of the at least one adjusting drive is preferred 152 , for example a housing and / or a cylinder stationary relative to the at least one carrier 154 arranged. At least one other component of the at least one adjusting drive is further preferred 152 movable relative to the at least one carrier 154 arranged, for example at least one rotor and / or at least one rotor and / or at least one piston.

The at least one actuator 152 is preferred as at least one linear drive 152 designed, for example, as at least one cylinder 152 with at least one cylinder piston, in particular as at least one fluid cylinder 152 , for example as at least one hydraulic cylinder 152 and preferably as at least one pneumatic cylinder 152 . As an alternative or in addition, other drives are also possible, for example at least one electric and / or magnetic linear drive and / or at least one camshaft. In this context, a cylinder is to be understood as a hollow body in which a piston is movably arranged, regardless of whether it is a shape or not circular cross-section or not. Single-acting adjusting drives with pre-tensioning or double-acting drives, that is to say in opposite directions, come into consideration, in particular single-acting cylinders or double-acting cylinders.

For example, the at least one lever body is 153 as a return element 153 formed, which is preferably at least when the adjusting drive is activated 152 one against the setting direction E. acting force on the at least one adjusting drive 152 is arranged exercising. The at least one adjusting drive is preferred 152 and the at least one lever body 153 at least temporarily arranged and / or can be arranged at a distance from one another. For example, the at least one adjusting drive restricts 152 the at least one lever body 153 only in the opposite direction to the setting direction E. in its freedom of movement. In particular, the at least one lever body is 153 in at least one direction, in particular the setting direction E. relative to each part of the actuator 152 moveable. Thus, when the adjusting drive is deactivated, a slight gap between the adjusting drive is preferred 152 and lever body 153 available.

In addition to the at least one adjusting drive, it is preferred 152 and the at least one lever body 153 at least one at least temporarily with the at least one lever body 153 and / or the at least one contact element 151 guide element in contact 156 arranged through which the adjustment direction E. an adjustment path of the at least one contact element 151 is given. The at least one guide element is preferably located 156 at least at a fourth point at least temporarily with the at least one lever body 153 and / or the at least one contact element 151 in contact and the at least a fourth digit is closer to the first digit than the second digit and more preferably also closer than the third digit. More preferably, the first point is arranged between the third point and the fourth point. The at least one guide element 156 is for example as at least one screw 156 formed on the at least one carrier 154 is arranged and through a recess of the at least one lever body 153 and / or the at least one contact element 151 runs.

In one embodiment of a connection, the at least one lever body is 153 at the second point in at least one compensation direction F. movable with the at least one carrier 154 connected and on the at least one carrier 154 stored. For example, this direction of compensation F. at least one component that is orthogonal to the direction of adjustment E. is oriented. That end of the at least one lever body can thereby 153 on which the at least one contact element 151 is arranged, are moved almost or completely linearly, for example, if because of large adjustment paths of the at least one contact element 151 otherwise wedging in the at least one guide element due to a pivoting movement 156 would be feared. For example, the at least one lever body has 153 at least one elongated hole that is connected to at least one on the at least one carrier 154 arranged screw cooperates accordingly. However, the approach path of the at least one contact element is preferred 151 so short that such problems do not occur, but rather the movement of the at least one contact element 151 runs essentially or at least approximately linearly. It preferably has the at least one adjusting drive 152 realizable adjustment path of the at least one contact element 151 a length of 2mm to 3mm. However, this approach path is further preferred during a cleaning process of the at least one nozzle surface 232 not fully utilized because there was already contact between the nozzle surface 232 and contact element 151 occurs. In an alternative embodiment, the at least one lever body is 153 at the second point firmly to the at least one carrier 154 connected, in particular the at least lever body is then 153 is rigid at one end relative to at least one component of the at least one adjusting drive 152 arranged.

For example, after adjusting the at least one contact element 151 to the at least one nozzle surface 232 there is preferably a wiping movement or a pulling movement. For this purpose, at least one cleaning drive is preferred 157 and at least one cleaning guide 168 arranged. These are preferably at least one contact element 151 and the at least one printhead 212 in particular by means of the at least one cleaning drive 157 in and / or against a cleaning direction G arranged movable relative to one another. The at least one carriers are preferred 154 and the at least one printhead 212 ; 412 in particular by means of the at least one cleaning drive 157 in and / or against the cleaning direction G arranged movable relative to one another, in particular for cleaning the at least one nozzle surface 232 . Such a relative movement is preferably made possible by the fact that the at least one cleaning module 150 with the at least one carrier 154 by means of the at least one cleaning drive 157 in and / or against the cleaning direction G is arranged movably. The at least one cleaning drive is preferred 157 as at least a tape drive 157 educated. Alternatively or additionally, the at least one cleaning drive is at least one spindle drive 157 educated. The at least one cleaning drive preferably has 157 at least one servo motor. the Cleaning direction G is preferably parallel to the at least one nozzle surface 232 of the at least one printhead 212 oriented. The cleaning direction is preferred G orthogonal to one for the substrate 02 intended transport direction B. oriented. The cleaning direction is preferred G parallel to the axial direction A. oriented. The cleaning direction preferably deviates from a horizontal direction by at most 30 °, and the cleaning direction is more preferred G horizontally aligned.

Especially around several nozzle areas 232 of the at least one printhead 212 and preferably several nozzle areas 232 adjacent printheads 212 To be able to clean at the same time, the at least one cleaning device has 222 preferably a plurality of cleaning modules 150 on. More preferably, additionally or alternatively, at least one cleaning module 150 or any cleaning module 150 preferably a plurality of contact elements 151 on, each of which preferably has its own adjusting drive 152 and / or a separate lever body 153 assigned. For example, it has at least one cleaning module 150 in the one for the substrate 02 intended transport direction B. several contact elements 151 one behind the other, additionally in the axial direction A. and / or the cleaning direction G are partially offset from one another, for example for reasons of space and / or because the print heads 212 themselves are arranged offset accordingly. Preferably corresponds to a total number of contact elements 151 of the at least one cleaning module 150 a total of in for the substrate 02 intended transport direction B. printheads arranged one behind the other 212 or rows of printheads 212 .

A plurality of in the axial direction A. and / or the cleaning direction G printheads arranged one behind the other 212 is preferred by means of a common contact element 151 cleaned. Depending on whether on the setting direction E. related to the nozzle surfaces 232 of these printheads arranged one behind the other 212 the at least one cleaning module 150 and in particular the respective contact element 151 next components of the printheads 212 are or not, the actuator can 152 for multiple printheads 212 be left in the same position or it is necessary when moving the respective contact element 151 from a nozzle face 232 in addition to the next, the contact element 151 active from one nozzle surface 232 and after the next nozzle area 232 to employ. This is why it is preferred with any printhead 212 the nozzle area 232 the component of the respective printhead 212 , the at least one cleaning module 150 and preferably the printing material during printing 02 closest to you.

Usually there is a single activation of contact elements 151 not necessary, but a cleaning process usually affects all print heads 212 of the corresponding printing unit 211 . Therefore, the plurality of contact elements is preferred 151 together with the at least one carrier 154 in and / or against the cleaning direction G movably arranged, in particular relative to the at least one print head 212 . The plurality of adjusting drives is further preferred 152 Can be activated simultaneously via at least one and preferably exactly one common supply line, in particular a pneumatic supply line. Alternatively, however, it is also conceivable to use any contact element 151 To be able to adjust individually, for example by each adjusting drive 152 is designed to be individually activated. Regardless of whether the positioning drives can be activated jointly or separately 152 point in one to the cleaning direction G orthogonal direction adjacent adjusting drives 152 preferred directions of adjustment E. which differ from one another by preferably at least 2 ° and preferably at most 10 °. Thereby are the directions of adjustment E. to the orientations of the nozzle surfaces 232 adjacent printheads 212 adjusted, for example if this is around the central cylinder as described 201 are arranged around.

The at least one collection facility 161 preferably has at least one floor 176 , at least one side wall 177 and preferably at least one, more preferably at least two side shields 178 on. The side shields 178 are preferably used to shield components that should not come into contact with cleaning agents and / or coating agents, for example the cleaning drive 157 . The at least one cleaning drive 157 is preferably within the at least one collecting device 161 arranged and thereby protected against mechanical damage, for example. The at least one collecting device preferably has 161 in the cleaning direction G a dimension that is larger than the working area of the at least one nozzle bar 213 . This is in particular within the at least one collecting device 161 enough space for at least one maintenance position and / or at least one basic position of the at least one cleaning module 150 . In this area there is preferably at least one collecting device 161 upwardly limiting cover 173 arranged.

It preferably has at least one cleaning module 150 at least one possibility, a cleaning agent on the at least one nozzle surface of at least one print head 212 to apply and remove from it again. Alternatively or preferably in addition to the at least one contact element 151 at least one contactless variant is preferably also provided for removal. It preferably has at least one cleaning module 150 at least one in particular with its dispensing opening 166 on the at least one print head 212 aligned and / or alignable first delivery device 158 for detergents. It preferably has at least one cleaning module 150 at least one on the at least one printhead 212 ; 412 aligned and / or alignable gas outlet nozzle 159 on. The at least one first dispensing device 158 is preferred as at least one spray nozzle 158 educated. A spray cone of the at least one first spray nozzle 158 has, for example, an opening angle between 80 ° and 60 ° and preferably between 100 ° and 140 °. At least one first dispensing opening is preferred 166 , especially first spray opening 166 the at least one first delivery device 158 in one direction with at least one component onto the at least one outlet opening 162 the at least one gas outlet nozzle 159 arranged too pointing. The cleaning agent is preferably designed as an at least partially liquid cleaning agent.

The at least one gas outlet nozzle 159 is preferred as at least one gas meter 159 , especially as at least one air knife 159 educated. A gas meter 159 is preferably a gas outlet nozzle 159 , the outlet of which 162 or the entirety of outlet openings 162 in one as the longitudinal direction of the outlet opening 162 designated first direction is substantially, for example at least ten times, preferably at least fifty times greater than in a direction orthogonal to the first direction, as the transverse direction of the outlet opening 162 designated second direction. The at least one outlet opening 162 the at least one gas outlet nozzle 159 has, for example, a dimension of at least 2 cm (two centimeters), more preferably at least 5 cm (five centimeters) and even more preferably at least 10 cm (ten centimeters) in its longitudinal direction. The at least one outlet opening 162 the at least one gas outlet nozzle 159 has in its transverse direction, for example, a dimension of between 0.01 mm and 1 mm, more preferably between 0.1 mm and 0.9 mm and even more preferably between 0.5 mm and 0.8 mm. Through the gas meter 159 , especially air knives 159 a gas flow, in particular air flow, is generated, which is preferably laminar and, for example, resembles a blade. The gas flow extends essentially while maintaining its dimensions orthogonal to the flow direction, for example up to a distance of several centimeters from the outlet opening.

The at least one outlet opening is preferred 162 the at least one gas outlet nozzle 159 with at least one supply line 174 connected. A flow cross section of the at least one outlet opening 162 the at least one gas outlet nozzle 159 is preferably smaller than a flow cross section of the supply line 174 . For example, a gas or gas mixture, in particular air, is supplied to the at least one feed line by means of at least one fan 174 fed. The fan generates in the supply line 174 for example a pressure of less than 6 bar. At least one in particular convexly curved guide surface is preferred 167 arranged, more preferably in an exit direction directly to the at least one exit opening 162 the at least one gas outlet nozzle 159 subsequently. A straight connection preferably has one of the at least one outlet opening 162 the at least one gas outlet nozzle 159 facing end of the at least one curved guide surface 167 with one of these at least one outlet opening 162 remote end of this at least one guide surface 167 in a direction that has at least one component related to the cleaning direction G from this at least one gas outlet nozzle 159 to the at least one first delivery device 158 shows. A distance between the at least one guide surface 167 to the at least one nozzle surface is preferably at least 2 mm at all times. The at least one guide surface is preferred 167 several nozzle areas 232 different print heads that are not aligned parallel to each other 212 assigned and therefore the distance from the printhead varies 212 to printhead 212 .

Through this at least one curved guide surface 167 a deflection of the exiting gas flow on the at least one curved guide surface is preferred 167 causes along. This deflection is also known as the Coanda effect. As a result, a flow direction of the gas flow is in particular along the at least one Nozzle area 232 of the at least one printhead 212 ; 412 realizable, more preferably an almost or actually to the at least one nozzle surface 232 parallel flow direction of the gas flow. The at least one guide surface 167 has, for example, a radius of curvature of preferably between 5 mm and 30 mm over an angular range of preferably between 20 ° and 100 ° and more preferably between 85 ° and 95 °. As a result, a corresponding gas flow can be almost or completely parallel to this at least one nozzle surface 232 of the printhead 212 ; 412 be aligned and particularly close to the at least one nozzle surface 232 of the printhead 212 ; 412 are brought up, in particular because there is no component that aligns the gas flow between the gas flow and the at least one nozzle surface 232 of the printhead 212 ; 412 necessary is. One of the at least one outlet opening 162 the at least one gas outlet nozzle 159 facing end of the at least one guide surface 167 preferably has a tangent surface, the surface normal of which is at an angle of preferably between 70 ° and 110 ° with a surface normal of the at least one nozzle surface 232 of the at least one printhead 212 having. One of the at least one outlet opening 162 the at least one gas outlet nozzle 159 remote end of the at least one guide surface 167 preferably has a tangent surface, the surface normal of which is at an angle of at most 20 ° with the surface normal of the at least one nozzle surface 232 of the at least one printhead 212 ; 412 having.

An effective exit direction of the at least one gas outlet nozzle 159 is preferably a direction in which the at least one gas flow moves freely. When the at least one curved guide surface is arranged 167 this effective exit direction is the direction in which the at least one guide surface 167 diverted gas stream flows after having the at least curved guide surface 167 has left seen in its direction of movement. Without the arrangement of the at least one curved guide surface 167 is the effective exit direction of the at least one gas outlet nozzle 159 a direction in which the at least one gas outlet nozzle 159 with your outlet opening 162 shows. The effective exit direction preferably has at least one component parallel to the at least one nozzle surface 232 and more preferably with a minor component on the at least one printhead 212 ; 412 to. The outlet opening 162 of the at least one gas outlet nozzle 159 however, preferably has one component on the at least one print head 212 ; 412 too, which is larger than a component with which it is parallel to the at least one nozzle surface 232 is aligned.

It therefore preferably has at least one printing unit 211 at least one printhead 212 and at least one cleaning device 222 with at least one cleaning module 150 on, the at least one printhead 212 and the at least one cleaning module 150 in and / or against the cleaning direction G are arranged movable relative to one another and wherein the at least one cleaning module 150 the at least one in particular with its dispensing opening 166 in one direction with at least one component on the at least one printhead 212 ; 412 aligned and / or alignable first delivery device 158 , especially spray nozzle 158 for preferably at least partially liquid cleaning agent and the at least one in particular with its outlet opening 162 in one direction with at least one component on the at least one printhead 212 ; 412 aligned and / or alignable gas outlet nozzle 159 having.

The at least one first dispensing opening are preferred 166 the at least one first delivery device 158 and the exit opening 162 the at least one gas outlet nozzle 159 at least in the cleaning direction G arranged spaced from each other. Such a distance is preferably at least 5 cm and more preferably at least 10 cm and even more preferably at least 15 cm. This makes it possible for the at least one contact element 151 and / or the at least one lever body 153 and / or the at least one adjusting drive 152 between the at least one first dispensing opening 166 the at least one first delivery device 158 and the outlet opening 162 the at least one gas outlet nozzle 159 to arrange. At least the at least one contact element is preferred 151 regarding the cleaning direction G between the at least one first dispensing opening 166 the at least one first delivery device 158 and the at least one outlet opening 162 the at least one gas outlet nozzle 159 arranged. The at least one lever body is further preferred 153 and / or the at least one adjusting drive 152 regarding the cleaning direction G between the at least one first dispensing opening 166 the at least one first delivery device 158 and the at least one outlet opening 162 the at least one gas outlet nozzle 159 arranged.

An exit direction of the at least one first delivery device preferably has 158 regarding the cleaning direction G a component on the at least one contact element 151 to assign. An exit direction of the at least one gas outlet nozzle preferably has 159 and / or one through the at least one curved guide surface 167 deflected flow direction from the at least one gas outlet nozzle 159 outflowing gas and / or the effective exit direction of the at least one gas exit nozzle 159 with respect to the cleaning direction G a component on the at least one contact element 151 to assign. The at least one contact element is preferably located 151 in a target area of the at least one delivery device 158 and / or in a target area of the at least one gas outlet nozzle 159 . At least one upper spray shield is preferred 172 stationary relative to the at least one collecting device 161 and / or relative to the at least one cleaning module 150 arranged.

The at least one first delivery device is preferred 158 and / or the at least one gas outlet nozzle 159 on the one hand and the at least one print head 212 on the other hand, in particular by means of at least one drive, in particular by means of the at least one cleaning drive 157 in and / or against the cleaning direction G arranged movable relative to one another. The at least one first delivery device is also preferred 158 and / or the at least one gas outlet nozzle 159 and / or the at least one cleaning module 150 relative to a frame 231 of the at least one printing unit 211 and relative to the at least one Printhead 212 is arranged movably. Such a relative movement is preferred through an absolute movement of the at least one cleaning module 150 realizable.

The at least one first delivery device is preferred 158 and the at least one gas outlet nozzle 159 on the at least one carrier 154 of the at least one cleaning module 150 arranged, more preferably on the same carrier 154 like the at least one actuator 152 and the at least one lever body 153 . In particular, the at least one lever body is preferred 153 and / or indirectly the at least one contact element 151 and / or the at least one first delivery device 158 and / or the at least one gas outlet nozzle 159 and / or the at least one adjusting drive 152 and / or at least one second delivery device 163 and / or at least one lower spray shield 169 ; 171 on the at least one and in particular on a common carrier 154 arranged and individually or preferably together in and / or against the cleaning direction G relative to the at least one printhead 212 and relative to the frame 231 of the at least one printing unit 211 movably arranged, for example by means of the at least one cleaning drive 157 . Such a relative movement is preferably made possible by the fact that the at least one carrier 154 by means of the at least one cleaning drive 157 in and / or against the cleaning direction G is arranged movably.

This preferably has at least one printing unit 211 four cleaning devices 222 each with a collection facility 161 and a cleaning module 150 each cleaning module 150 four contact elements 151 , four positioning drives 152 , four lever bodies 153 , a first dispenser 158 , a gas outlet nozzle 159 and two second dispensers 163 having.

It preferably has at least one cleaning module 150 at least one, for example as a second spray nozzle 163 trained second delivery device 163 for in particular at least partially liquid cleaning agent. A spray cone of the at least one second spray nozzle 163 has, for example, an opening angle between 80 ° and 60 ° and preferably between 100 ° and 140 °. The at least one second delivery device is preferred 163 with her, for example, as a second spray opening 164 formed second dispensing opening 164 in one direction with at least one of the at least one printhead 212 facing away component is aligned and / or arranged alignable. The at least one second delivery device is also preferred 163 with their second dispensing opening 164 , especially spray opening 164 for example at least partially from above onto the at least one collecting device 161 , especially a drip pan 161 pointing aligned and / or arranged alignable. The at least one second delivery device is preferred 163 relative to the at least one collecting device 161 movably arranged and / or on the at least one carrier 154 arranged.

It preferably has at least one cleaning module 150 the at least one lower spray shield 169 ; 171 and more preferably at least a first lower spray shield 169 and at least a second lower spray shield 171 on. That at least one lower spray shield 169 ; 171 preferably serves to provide an area of action of the at least one second delivery device 163 in and / or against the cleaning direction G to limit. In particular, the at least one first lower spray shield is preferably used 169 for this purpose, the area of action of the at least one second delivery device 163 in the cleaning direction G to limit and is preferably used by the at least one second lower spray shield 171 for this purpose, the area of action of the at least one second delivery device 163 against the cleaning direction G to limit. In this way, other components of the at least one cleaning module become 150 from the second delivery device 163 dispensed cleaning agent and in connection therewith from the at least one collecting device 161 rebounding cleaning agent and / or coating agent preferably completely shielded.

This is preferably at least one lower spray shield 169 ; 171 on the at least one carrier 154 of the at least one cleaning module 1590 is arranged and can be moved together with it. The at least one second delivery device preferably has an ejection direction 163 at least one component pointing vertically downwards and at least one horizontally opposite or preferably in the cleaning direction G having component. For example, there is at least one second dispensing opening 164 regarding the cleaning direction G on the at least one gas outlet nozzle 159 too aligned.

This is preferably at least one cleaning module 150 for example within the at least one cleaning device 222 relative to the at least one cleaning device 222 and / or the at least one cleaning module 150 movable and in different positions, in particular relative to the at least one collecting device 161 can be arranged. One of these positions is preferably a basic position. This is preferably at least one cleaning module 150 at least during a printing operation and / or at least during the at least one cleaning module 150 not used is arranged in the basic position. At least one of these positions is preferably a first working position or a second working position, each of which is characterized, for example, by the fact that individual components of the at least one cleaning module are at this position 150 activated or deactivated, for example the at least one first delivery device 158 and / or the at least one gas outlet nozzle 159 and / or the at least one adjusting drive 152 and / or the at least one second delivery device 163 . At least one such position is preferably at least one maintenance position. The at least one maintenance position is preferably a position in which the at least one contact element is cleaned from time to time 151 is made. At least one maintenance item is preferably almost or completely identical to the basic item.

A preferred embodiment of a method for cleaning the at least one nozzle surface is described below 232 of the at least one printhead 212 of the at least one printing unit 211 described. The at least one print head is preferred 212 initially from a substrate 02 and / or from a substrate guide element 201 removed and / or in particular by means of the at least one positioning device 217 ; 218 ; 219 ; 221 from at least one printing position in at least one rest position, in particular a maintenance position, for example by adding a distance between the at least one print head 212 and that for the substrate 02 intended transport route is enlarged. Thereafter, the at least one cleaning device is preferred 222 moved along the supply path and between at least one nozzle of the at least one print head 212 and one of these at least one nozzle area closest to the area for the printing material 02 provided transport path and / or between at least one nozzle of the at least one print head 212 and a region of a transmission body, in particular a central cylinder, which is closest to this at least one nozzle 201 arranged. The at least one cleaning device is preferred 222 for this at least orthogonal to the axial direction A. and / or the cleaning direction G emotional. The at least one cleaning device is preferred 222 for this at least orthogonal to the setting direction E. emotional. The at least one cleaning device is preferred 222 for this at least parallel to that for the printing material 02 intended transport direction B. emotional. In an alternative embodiment, the at least one cleaning device is used 222 for this at least parallel to the axial direction A. and / or the cleaning direction G emotional. The at least one cleaning device is preferred 222 along the at least one supply path from the at least one parking position of the cleaning device 222 in the at least one operating position of the cleaning device 222 emotional.

Subsequently, in a preferred embodiment, the at least one print head 212 relative to the at least one cleaning device 222 emotional. For example, the at least one print head is used for this 212 against the direction of incidence E. moved, especially lowered. This movement, which may be carried out, is preferably of such a small extent that the position of the at least one print head 212 thereafter continue to apply as the at least one rest position, in particular the maintenance position. In this way, for example, a cleaning space can be sealed off, for example at least from the at least one print head 212 and the at least one collecting device 161 is limited and is preferably hermetically sealed.

In an activation process that is preferably carried out afterwards, the at least one cleaning module is preferred 150 within the at least one cleaning device 222 moved from its home position to the first working position, preferably in the cleaning direction G . An application process is preferably started in the first working position.

The at least one on the at least one carrier is preferred in the application process 154 arranged first delivery device 158 of the at least one cleaning module 150 the at least one cleaning device 222 activated, whereby the at least partially liquid cleaning agent by means of the at least one first dispensing device 158 on the at least one nozzle surface 232 is applied. The at least one cleaning module is preferred 150 while doing so in the cleaning direction G emotional. As a result, the at least one is also attached to the at least one carrier 154 arranged first delivery device 158 of the at least one cleaning module 150 in the cleaning direction G relative to the at least one printhead 212 moved and is at least the at least partially liquid cleaning agent by means of the at least one first dispensing device 158 on preferably at least half of the and more preferably on the entire at least one nozzle area 232 applied. The application process preferably ends as soon as the at least one cleaning module has reached the second working position.

Thereafter, the cleaning agent and / or loosened soiling, such as for example coating agent residues and / or printing material parts, is preferably removed at least partially and preferably completely from the at least one nozzle surface in at least one first removal process 232 removed. For this purpose, the at least one gas outlet nozzle is preferred 159 activated. It is therefore preferred to start gas or a gas mixture from the at least one gas outlet nozzle 159 to eject. This ejection is preferably started while the at least one cleaning module is in operation 150 is in the second working position. It is also possible to have the at least one cleaning module 150 initially in or against the cleaning direction G to move to another position and start there with the expulsion of the gas or gas mixture. In the first removal process, the at least one is attached to the carrier 154 arranged gas outlet nozzle 159 in and / or preferably against the cleaning direction G relative to the at least one printhead 212 ; 412 emotional. It is preferred to remove at least the cleaning agent and / or the loosened dirt from the at least one nozzle surface 232 from at least one outlet opening 162 the at least one gas outlet nozzle 159 at least one gas or gas mixture in one direction with at least one on the at least one nozzle surface 232 of the at least one printhead 212 ; 412 directed component ejected and preferably through the at least one guide surface 167 at least partially deflected. The gas flow removes the at least one cleaning agent and / or the loosened contamination from the at least one nozzle surface 232 removed. Part of the cleaning agent can, for example, evaporate and be sucked off. The at least one cleaning agent and / or the loosened contaminants are and / or are, however, preferably at least partially entrained by the gas flow and into the at least one collecting device 161 conveyed where it is collected and / or preferably flows to a drain. The first removal process is ended, for example, when the at least one cleaning module is located 150 is again in or near the first working position.

The at least one nozzle surface is preferred through the application process and the first removal process 232 freed from contamination, with the direction of the gas flow preferably largely avoiding cleaning agent and / or dirt and / or ink from the outside into the nozzles of the at least one print head 212 to transport.

At least one of the nozzles and / or nozzle opening of the at least one print head is preferably subsequently cleaned 212 . For this purpose, a coating agent, in particular printing ink or ink from at least one of the at least one nozzle surface, is preferably first used in an exit process 232 associated nozzle of the at least one print head 212 delivered, more preferably from all nozzles of the at least one print head 212 . This coating agent pushes dirt and / or cleaning agent that might have entered the nozzles to the outside. Coating agent that may have dried on inside the nozzles is also preferably pressed outwards. An amount of coating agent dispensed is preferably kept as small as possible, for example by only dispensing so much coating agent that each nozzle results in an outwardly curved droplet which, however, does not detach itself from the nozzle. Should, however, more coating agent be released so that drops are detached, these are preferred by the collecting device 161 caught.

A second removal process, which is also referred to as a peeling process, then preferably takes place in order to remove the coating agent that has been released. For this purpose, the at least one adjusting drive is preferred first 152 activated and / or the at least one in particular on the at least one carrier 154 attached contact element 151 initially with the at least one nozzle surface 232 brought into contact and then with the at least one nozzle surface 232 in contact relative to the at least one printhead 212 ; 412 opposite and / or preferably in the cleaning direction G emotional. In this case, the coating agent released in the exit process, for example ink, is at least partially removed from the at least one nozzle surface 232 removed. The movement preferably takes place in the cleaning direction G for several and more preferably all contact elements 151 of the at least one cleaning module 150 and more preferably the at least one cleaning device 222 at the same time, in particular during these several or preferably all contact elements 151 with the respective corresponding at least one nozzle area 232 stay in contact. After doing at least one nozzle area 232 and preferably all in the cleaning direction G nozzle surfaces arranged one behind the other 232 have been treated, the at least one contact element 151 preferably again from the at least one nozzle surface 232 removed, for example by deactivating the at least one adjusting drive 152 in connection with the restoring force, for example of the at least one lever body 153 and / or by reverse activation of the at least one adjusting drive 152 . The at least one cleaning module is preferred 150 then against the cleaning direction G in its home position within the at least one cleaning device 222 moved back.

Preferably, for example, the at least one is preferably on the carrier afterwards in a rinsing process 154 of the at least one cleaning module 150 arranged second delivery device 163 of the at least one cleaning module 150 in and / or against the cleaning direction G relative to the at least one printhead 212 ; 412 moved, for example by turning the cleaning module 150 accordingly in and / or against the cleaning direction G is moved. Is preferred in particular at least partially liquid cleaning agent from the at least one second dispensing device 163 preferably on the at least one collecting device 161 directed, in particular in one of the at least one nozzle surface 232 pointing away direction. The at least one collecting device is preferred 161 at least at this point in time at least partially below the at least one nozzle surface 232 arranged. By at least one horizontally opposite or preferably in the cleaning direction G pointing component of the ejection direction of the at least one second delivery device 163 and / or by an inclination of a bottom surface of the at least one collecting device 161 and / or by moving the cleaning module accordingly 150 liquid cleaning agent and / or coating agent and / or dissolved dirt along the collecting device 161 preferably conveyed to at least one drain. The at least one cleaning module is preferred 150 then against the cleaning direction G in its home position within the at least one cleaning device 222 moved back. Alternatively, the rinsing process is carried out during that movement with which the at least one cleaning module 150 after the second removal process back to the basic position and / or against the cleaning direction G is moved.

For example, with the cleaning module arranged in the at least one maintenance position 150 a cleaning of the at least one contact element is then preferred 151 performed. In a first sub-process of a maintenance process, the at least one cleaning module is preferred 150 regarding the cleaning direction G positioned in a first maintenance position in such a way that the at least one contact element 151 on the cleaning direction G related between the at least one first delivery device 158 and the at least one upper spray shield 172 is arranged. The at least one contact element is optional and preferred 151 in the pitch direction E. moved, for example to further into a target area of the at least one first delivery device 158 and to improve shielding. The at least one first delivery device is then preferred in a second sub-process of the maintenance process 158 activated. As a result, cleaning agent is applied to the at least one contact element 151 applied. After deactivation of the at least one first delivery device 158 is the at least one contact element 151 preferably against the setting direction again E. emotional.

Thereafter, the at least one cleaning module is preferably used in a third sub-process of the maintenance process 150 in the cleaning direction G moved, for example by at least 2 mm and at most 20 mm, preferably by at least 5 mm and at most 10 mm, but in particular so far that the at least one contact element 151 regarding the cleaning direction G between the at least one gas outlet nozzle 159 and the at least one upper spray shield 172 is arranged. For example, this is at least one cleaning module 150 then placed in a second maintenance position. The at least one contact element is optional and preferred 151 in the pitch direction E. moved, for example to further into a target area of the at least one gas outlet nozzle 159 and to improve shielding. The at least one gas outlet nozzle is then preferred in a fourth sub-process of the maintenance process 159 activated. This becomes at least one contact element 151 exposed to the escaping air flow. Part of the cleaning agent can, for example, evaporate and be sucked off. The at least one cleaning agent and / or the loosened contaminants are and / or are, however, preferably at least partially entrained by the gas flow and into the at least one collecting device 161 conveyed where it is collected and / or preferably flows to a drain. After deactivation of the at least one gas outlet nozzle 159 is the at least one contact element 151 preferably against the setting direction again E. emotional. Thereafter, the at least one cleaning module is preferred 150 again against the cleaning direction G moved to the first maintenance position or home position.

An operator can preferably influence which processes of the method are carried out and which are not and whether, if necessary, processes should be carried out individually. The maintenance process is preferably carried out in each case.

The at least one first delivery device is preferred 158 and / or the at least one contact element 151 and / or the at least one gas outlet nozzle 159 and / or the at least one carrier 154 and / or the at least one cleaning module 150 overall in the at least one, in particular at least the first maintenance position with respect to the cleaning direction G from the at least one printhead 212 spaced apart. This is preferably at least one cleaning module 150 in the at least one maintenance position with respect to the adjustment direction E. from the at least one cover 173 covered, for example to be protected from drying out and / or from soiling and / or damage.

After the substrate web 02 the at least one first printing unit 200 has happened, the substrate web will 02 along their transport route transported further and preferably the at least one first dryer 301 the at least one dryer unit 300 fed. The at least one first dryer 301 is preferred as a flow dryer 331 and / or radiation dryer 331 and / or hot air dryer 331 and / or infrared radiation dryer 301 educated.

Along the transport path of the substrate web 02 is preferably at least one second printing unit 400 arranged. The transport route of the substrate web 02 by the at least one second printing unit 400 runs analogously to the transport path through the at least one first printing unit 200 . Inside the second printing unit 400 is preferably at least a second, as an inkjet printing unit 411 or ink-jet printing unit 411 trained printing unit 411 on the second central cylinder 401 aligned. That at least a second printing unit 411 the at least one second printing unit 400 is preferably identical to the at least one first printing unit 211 the at least one first printing unit 200 constructed, in particular with respect to at least one nozzle bar 413 , at least one, as an inkjet printhead 412 trained printhead 412 and their arrangement in double rows, the execution and resolution of the printing process, the arrangement, alignment and control of the nozzles, the mobility and adjustability of the at least one nozzle bar 413 and the at least one printhead 412 means of at least one adjustment mechanism with a corresponding electric motor and the cleaning device 222 . This is preferably at least one second printing unit 411 as a multi-color printing unit 411 , especially four-color printing unit 411 educated. Regarding the transport route of the substrate web 02 is after the at least one second printing unit 400 at least a second dryer 331 the at least one dryer unit 300 arranged. The structure of the at least one second dryer 331 preferably resembles the structure of the at least one first dryer 301 .

In at least one variant of the printing machine, the printing machine is 01 as a web-fed rotary inkjet printing machine 01 and at least one transmission body is formed with the at least one first central pressure cylinder 201 arranged to form a transfer gap. Then the at least one print head is preferred 212 aligned with the at least one transmission body. The central printing cylinder 201 is in this case preferably designed as an impression cylinder.

The at least one first central printing cylinder is preferred 201 one to support a substrate web 02 in a first transfer area, in particular a first transfer area for coating agents serving motor-driven rotary bodies 201 . The at least one second central printing cylinder is preferred 401 one to support a substrate web 02 in a second transfer area, in particular a second transfer area for coating agents serving motor-driven rotary bodies 401 . The first and / or the second transfer area is preferably an area which is provided for contact between the printing substrate 02 and producing coating means, for example a target area of at least one nozzle of at least one printhead arranged in a printing position 212 and / or at least one working area of at least one print head arranged in a printing position 212 and / or an entire working area of at least one nozzle bar 213 and / or a gap between the respective central printing cylinder 201 ; 401 is formed with an optionally arranged transmission body.

List of reference symbols

01

Printing machine, inkjet printing machine, web printing machine, webbing inkjet printing machine, rotary printing machine, webbing rotary printing machine, webbing rotary inkjet printing machine

02

Printing material, printing material web, paper web, textile web, foil, plastic film, metal foil

100

Printing material source, roll unwinding device, roll changer

101

Substrate roll

111

Axis of rotation ( 101 ; 103)

150

Cleaning module ( 222 )

151

Contact element, wiper, puller, wiper blade

152

Actuator

153

Lever body, spring plate, wiper carrier, return element

154

carrier

155

-

156

Guide element, screw

157

Cleaning drive, belt drive, spindle drive

158

Dispenser, spray nozzle, first

159

Gas outlet nozzle, gas knife, air knife

160

-

161

Collecting device, collecting basin

162

Outlet opening ( 159 )

163

Dispensing device, spray nozzle, second

164

Dispensing port, spray port, second (163)

165

-

166

Dispensing port, spray port, first (158)

167

Guide surface

168

Cleaning guide

169

Spray shield, lower, first

170

-

171

Spray shield, lower, second

172

Spray shield, upper one

173

cover

174

Supply line

175

-

176

floor

177

Side wall

178

sign

200

Unit of pressure, first

201

Printing central cylinder, central cylinder, first; Solid of revolution

202

-

203

Roller, deflection roller

204

Space ( 201 ; 203 )

205

-

206

Cylinder, impression roller, first

207

Axis of rotation ( 201 )

208

Drive motor, electric motor, direct drive, individual drive, synchronous motor

209

Impression gap, first

210

-

211

Printing unit, inkjet printing unit, ink-jet printing unit, multi-color printing unit, four-color printing unit, first

212

Printhead, inkjet printhead, first

213

Nozzle bar, first

214

-

215

-

216

-

217

Positioning device, first

218

Positioning device, second

219

Positioning device, third

220

-

221

Positioning device, fourth

222

Cleaning device, maintenance device

223

Feed device, guide system

224

Positioning guide

225

-

226

Positioning drive, electric motor, hydraulic cylinder, pneumatic cylinder

227

-

228

Pulling means, pushing means, chain, rail, rack

229

Feed drive

230

-

231

Frame ( 200 ; 400 )

232

Nozzle area, area ( 212 )

300

Dryer unit

301

Dryer, infrared radiation dryer, radiation dryer, flow dryer, UV radiation dryer, hot air dryer, first

331

Dryer, infrared radiation dryer, flow dryer, radiation dryer, hot air dryer, UV radiation dryer, second

400

Pressure unit, second

401

Printing central cylinder, central cylinder, second; Solid of revolution

408

Drive motor, direct drive, electric motor, single drive, synchronous motor

409

-

410

-

411

Printing unit, inkjet printing unit, ink-jet printing unit, multi-color printing unit, four-color printing unit, second

412

Printhead, inkjet printhead, second

413

Nozzle bar, second

500

Post-processing device, folding device, winding device, sheet cutter, flat delivery

A.

Direction, axial

B.

Transport direction

E.

Direction of adjustment

F.

Compensation direction

G

Cleaning direction

Claims (12)

Printing unit (211; 411), wherein the printing unit (211; 411) has at least one print head (212; 412) and at least one cleaning device (222) with at least one movable cleaning module (150) and wherein the at least one cleaning module (150) has at least one Contact element (151) which can be brought into contact with at least one nozzle surface (232) of the at least one print head (212; 412) by means of at least one adjusting drive (152) and wherein the at least one contact element (151) is at a first location of at least one lever body (153) is arranged on this at least one lever body (153) and wherein the at least one lever body (153) is mounted on a second location of this at least one lever body (153) on at least one carrier (154) and wherein the at least one adjusting drive (152 ) at a third point of the at least one lever body (153) is in contact with this at least one lever body (153) and / or can be brought and wherein along the at least est a lever body (153) the third point is arranged between the first point and the second point, characterized in that the at least one cleaning module (150) at least one on the at least one print head (212; 412) and has at least one contact element (151) aligned and / or alignable first dispensing device (158) for cleaning agent. Printing unit after Claim 1 , characterized in that the at least one lever body (153) is elastic. Printing unit after Claim 1 and / or 2, characterized in that the at least one cleaning module (150) with the at least one carrier (154) by means of at least one cleaning drive (157) in and / or against a cleaning direction (G) relative to the at least one print head (212; 412) is arranged movably and that the cleaning direction (G) is oriented orthogonally to a transport direction (B) provided for a printing material (02). Printing unit after Claim 1 and / or 2 and / or 3, characterized in that the at least one cleaning module (150) has at least one gas outlet nozzle (159) which is oriented and / or can be oriented towards the at least one print head (212; 412) and the at least one contact element (151). having. Printing unit after Claim 1 and / or 2 and / or 3 and / or 4, characterized in that the at least one contact element (151) acts on the at least one nozzle surface (232) by means of the at least one adjustment drive (152) in and / or against an adjustment direction (E). can be moved to and / or away from the at least one nozzle surface (232). Printing unit after Claim 1 and / or 2 and / or 3 and / or 4 and / or 5, characterized in that the at least one contact element (151) is designed as at least one wiper (151). Printing unit after Claim 1 and / or 2 and / or 3 and / or 4 and / or 5 and / or 6, characterized in that in addition to the at least one adjusting drive (152) and the at least one lever body (153) at least one at least temporarily with the at least one Lever body (153) and / or the at least one contact element (151) in contact with guide element (156) is arranged, by which the adjustment direction (E) of an adjustment path of the at least one contact element (151) is predetermined. Printing unit after Claim 1 and / or 2 and / or 3 and / or 4 and / or 5 and / or 6 and / or 7, characterized in that the at least one lever body (153) is designed as a restoring element (153), which at least when the adjusting drive is activated (152) a force acting against the adjustment direction (E) is arranged to exert a force on the at least one adjustment drive (152). Printing unit after Claim 1 and / or 2 and / or 3 and / or 4 and / or 5 and / or 6 and / or 7 and / or 8, characterized in that the at least one cleaning module (150) has a plurality of contact elements (151), which each has its own adjusting drive (152) and its own lever body (153) is assigned. Printing unit after Claim 9 , characterized in that the plurality of adjusting drives (152) can be activated simultaneously via at least one common supply line. Printing unit after Claim 9 and / or 10, characterized in that the plurality of contact elements (151) are arranged to be movable together with the at least one carrier (154) in and / or against the cleaning direction (G). Printing unit after Claim 4 and / or 5 and / or 6 and / or 7 and / or 8 and / or 9 and / or 10 and / or 11, characterized in that the at least one first delivery device (158) and the at least one gas outlet nozzle (159) on which at least one carrier (154) is arranged.

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