DE102014206994A1 - Printing unit with at least one print head and at least one cleaning device and a method for cleaning at least one nozzle surface of at least one print head - Google Patents

Abstract

The invention relates to a printing unit which has at least one print head and a cleaning device with a cleaning module, wherein the print head and the cleaning module are arranged movable relative to each other in and / or against a cleaning direction and wherein the cleaning module on the at least one print head aligned and / or alignable first Wherein the cleaning module has a aligned and / or alignable gas outlet nozzle and a method for cleaning a nozzle surface of a print head of a printing unit, wherein in a application process arranged on a carrier first dispensing device of a cleaning module in a cleaning direction relative to the at least one print head is moved while a cleaning agent is applied by means of the first dispensing means on the nozzle surface and wherein in a first removal process a on the carrier ange ordered gas outlet nozzle is moved in and / or opposite to the cleaning direction relative to the printhead, while at least one gas is ejected directed out of an outlet opening of the gas outlet nozzle on the nozzle surface.

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 and a method for cleaning at least one nozzle surface of at least one print head.

Various printing methods are known which can be used in printing presses. One such printing method is ink jet printing or ink jet printing. In this case, individual coating agent drops are ejected from nozzles of printheads and transferred to a substrate in such a way that a printed image results on the substrate. By individual control of a plurality of nozzles so different print images can be created. There is no fixed printing form and thus it is possible to design each individual print product individually. As a result, personalized printed products can be produced and / or small runs of printed products can be produced at low cost due to the saving of the printing forme.

An exact match of a print image on front and back of a double-sided substrate is called register ( DIN 16500-2 ). Multi-color printing is called the Passer (DIN 16500-2), when individual print images of different colors are combined exactly to a picture. Also in the context of inkjet printing, appropriate measures must be taken to maintain register and / or register.

By the DE 10 2011 076 899 A1 a printing machine is known, wherein the printing machine has a first printing unit having a central cylinder and at least one ink jet print head.

Inks and printing inks are preferably solutions or dispersions of at least one colorant in at least one solvent. Suitable solvents include, for example, water and / or organic solvents. Inks 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 may be pigments and / or dyes, pigments being insoluble in the application medium, while dyes are soluble in the application medium. Nonetheless, colorless paints are also meant below when mention is made of coating compositions and / or inks and / or printing inks.

In printing units, it comes again and again to contamination, for example, by dried on coating agent such as ink or ink or by parts of a printing material such as paper fibers or by dust or the like or by mixtures of the substances mentioned. As a result, for example nozzles of printing heads can be narrowed or blocked, which can lead to incorrect application of coating agent. Both within nozzles and on outer nozzle surfaces of printheads such contamination can have negative consequences. There are therefore different cleaning devices known.

By the WO 2013/134737 A1 is a cleaning device with engageable contact elements known.

By 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 by means of a Anstellantriebs with a nozzle surface of the print head in contact and wherein the contact element is arranged at a first location of a lever body on this lever body and wherein the lever body is mounted at a second location of this lever body on a support and wherein the Anstellantrieb is in contact with this lever body at a third location of the lever body.

By 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 movable relative to each other and wherein the at least one cleaning module at least one aligned and / or alignable at least one print head first dispensing device for Having cleaning agent.

By the US 2011/0074869 A1 is a cleaning device is known, applied to the detergent and at the same time sucked against.

The invention has for its object to provide a printing unit with at least one printhead and at least one cleaning device and a method for cleaning at least one nozzle surface of at least one printhead.

The object is achieved by the features of claim 1 and the features of claim 13.

A printing press has at least one printing unit. An advantage of the printing unit, the printing unit having 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 Anstellantriebs, in particular from at least one spaced first relative position, at least one nozzle surface of the at least one printhead is brought into contact, for example, in particular in a contacting second relative position, and preferably wherein the at least one contact element at a first location of at least one lever body this at least one lever body is arranged and the at least one lever body is mounted on a second body of this at least one lever body on at least one carrier and the at least one Anstellantrieb at least temporarily at a third location of the at least one lever body with this at least one lever body in contact and / or can be brought and wherein preferably along the at least one lever body, the third position between the first location and the second location is arranged, has at least the advantage that the cleaning module are made particularly compact can. In particular, in the context of printheads having, for example, because of their orientation to a central cylinder overlapping target areas, a compact design is particularly advantageous. A further advantage is that this arrangement of Anstellantrieb compared with the Anstellweg the contact element only requires a relatively small stroke and therefore can be made very compact even in a Anstellrichtung.

The adjustment direction is preferably determined by the fact that the at least one contact element is movable into and / or against the at least one nozzle surface and / or away from the at least one nozzle surface by means of the at least one Anstellantriebs. Preferably, the at least one nozzle surface is a surface of the at least one print head having a plurality of nozzles, in particular nozzle openings, of nozzles of the at least one print head. Preferably, the at least one printhead is at least one inkjet printhead. The at least one carrier can also consist of several components which are arranged rigidly to one another. Nevertheless, a corresponding entirety of components should be considered as the at least one carrier.

In particular, the third location between the first location and the second location is preferably arranged with respect to a direction pointing from the first location to the second location. Preferably, the at least one lever body is elastically formed, that is to say in particular reversibly deformable and having its own restoring force. As a result, damage to, for example, the contact element and / or the print head can be avoided even in case of malfunction of a Anstellantriebs and / or change in Anstellwegen because the Hebelköper allows evasive movements of at least one contact element. The Anstellantrieb can thereby be particularly favorable than, for example, acting in one direction pneumatic actuator. Preferably, the at least one Anstellantrieb limits the at least one lever body only against the Anstellrichtung in the freedom of movement, while the at least one lever body is movable in at least one direction relative to each part of the Anstellantriebs. For example, the at least one Anstellantrieb and the at least one lever body at least temporarily spaced from each other and / or can be arranged.

A dimension of the at least one lever body in the setting direction is preferably smaller than any dimension of the at least one lever body in each direction orthogonal to the setting direction. This also allows a compact structure and favors its elastic properties. More preferably, the dimension of the at least one lever body in the setting direction is less than one-tenth of each dimension of the at least one lever body in each direction orthogonal to the Anstellrichtung. Preferably, therefore, the at least one lever body is designed as a restoring element which, at least when the actuating drive is activated, arranges a force acting counter to the actuating direction on the at least one actuating drive.

Preferably, the at least one contact element is designed as at least one wiper, for example as at least one wiper blade. The wiper blade is formed, for example, as a profile 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 agent, in particular with its dispensing opening aligned with and / or alignable with the at least one print head and / or with the at least one contact element. The at least one cleaning module preferably has at least one gas outlet nozzle aligned and / or orientable, 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 which has at least one print head and at least one cleaning device with at least one cleaning module, wherein preferably at least one print head and the at least one cleaning module are arranged movable relative to each other in and / or opposite to the cleaning direction, and preferably wherein the at least one cleaning module at least one on the at least one print head, in particular on at least one nozzle surface of at least A printhead-oriented and / or alignable first dispensing device for cleaning agent and / or preferably wherein the at least one cleaning module has at least one aligned on the at least one print head, in particular on the at least one nozzle surface of the at least one print head and / or alignable gas outlet nozzle, at least the Advantage on that a particularly gentle cleaning can be made. In addition, the possibility is created by separate application and removal of the cleaning agent to adjust a contact time of the cleaning agent to the given circumstances.

Preferably, the at least one cleaning module with the at least one carrier by means of at least one cleaning drive in and / or against a cleaning direction relative to the at least one printhead and preferably arranged along several, for example at least three and preferably at least seven printheads movable. As a result, a number of cleaning modules to be used and / or contact elements and / or Anstellantrieben is less than a number of printheads, which in particular acquisition costs are reduced. Preferably, the cleaning direction is oriented parallel to the at least one nozzle surface of the at least one print head, so that a simple relative movement with simple means, such as a linear drive as a cleaning drive can be realized. Preferably, the cleaning direction is oriented orthogonal 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 those arrangements of print heads in which not all print heads have mutually parallel ejection directions, such as in such cases where print heads are arranged around a central cylinder ,

The at least one positioning 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. Alternatively or additionally, other types of drives are possible, for example, electric and / or magnetic drives and / or drives having rotors and / or stators. If a cylinder is mentioned, then in particular a corresponding piston movable therein is meant. For example, at least one single-acting and / or double-acting drive, in particular cylinders is used. At least one component of the at least one positioning drive is preferably arranged in a stationary manner relative to the at least one carrier.

In addition to the at least one positioning drive and the at least one lever body, at least one guide element is arranged at least temporarily in contact with the at least one lever body and / or the at least one contact element, by which the setting direction of a setting path of the at least one contact element is predetermined. As a result, an optimized adjusting movement of the at least one contact element is made possible. Preferably, the at least one lever body at the second location in at least one compensation direction is movably connected to the at least one carrier and 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, for example, an arcuate movement which could occur with a fixed connection at the second location and at the same time a very large positioning travel. Alternatively, the at least one lever body at the second location is firmly connected to the at least one carrier, in particular when the Anstellweg is so small that the at least one contact body can easily follow the guide element, without causing difficulties due to any arcuate movements. Preferably, the at least one guide element is 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 location, wherein more preferably the at least one fourth location of the first location is closer than the second location and more preferably also closer than the third digit. Preferably, the first location is located between the third location and the fourth location.

Preferably, the at least one cleaning module on a plurality of contact elements, each of which is assigned its own Anstellantrieb and a separate lever body. This ensures that even printheads with different ejection directions can be cleaned by means of a common cleaning module. Thus, manufacturing costs and operating costs can be saved, especially because fewer cleaning drives are necessary. Preferably, the plurality of Anstellantrieben via at least one common in particular pneumatic supply line can be activated simultaneously and / or each cleaning module has exactly one first dispensing device. As a result, control devices such as valves can be saved. Preferably, the plurality of contact elements together with the at least one carrier in particular relative to the at least one print head in and / or arranged opposite to the cleaning direction movable.

Preferably, 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 arranged to be movable relative to a frame of the at least one printing unit and relative to the at least one print head. Preferably, 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 arranged 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 the carrier on which the at least one positioning drive and / or the at least one lever body are 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 spray opening with at least one component to the at least one outlet opening of the at least one gas outlet nozzle. More preferably, the discharge opening of the at least one dispensing device with at least one component to the at least one contact element. As a result, contactless cleaning agent can be applied 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, for example at least partially liquid detergent, designed as a second spray nozzle, the dispensing opening, in particular the spray opening, being oriented away from the at least one print head and / or aligned is. Under at least partially liquid detergent is to be understood in particular completely liquid detergent. The printing group preferably has at least one collecting device, for example collecting trough. More preferably, the at least one second dispensing device with its dispensing opening, in particular spray opening, preferably oriented pointing from the top of the at least one collecting device and / or arranged alignable. Preferably, the at least one second dispensing device is arranged to be movable relative to the at least one collecting device. By this second dispensing device, it is possible in an advantageous manner to clean the catcher without an operator would have to intervene manually. As a result, the catcher can always be kept clean, without it being necessary to disassemble parts of the printing unit. Thus, the reliability is increased because regular cleaning is possible without much effort.

Preferably, the at least one gas outlet nozzle is designed as a gas meter, in particular as an air knife. This allows a particularly effective removal of detergent and / or contamination can be made with low gas consumption. Preferably, at least one, for example, convexly curved guide surface is subsequently arranged in an outlet direction of the at least one gas outlet nozzle to at least one outlet opening of the at least one gas outlet nozzle. As a result, the escaping gas can be brought to the corresponding nozzle surface particularly close in a desired direction of movement. Preferably, a rectilinear connection of one of the at least one outlet opening of the at least one gas outlet nozzle facing the end of the curved Leifläche with a said at least one outlet opening facing away from the end of this guide surface in a direction having at least one component, 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 an 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 these two a common Einwirkbereich. If necessary, these can then act on a same part of the at least one nozzle surface. More preferably, the at least one contact element is arranged with respect to the cleaning direction 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 action region 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 dispensing device and the at least one gas outlet nozzle can be used for cleaning the at least one contact body.

Particularly advantageous is a method for cleaning the at least one nozzle surface of the at least one print head of the printing unit, wherein in an application process, the at least one disposed on a carrier first dispensing device of the at least one cleaning module is moved in the cleaning direction relative to the at least one print head and at least one at least partially liquid cleaning agent is applied by means of the at least one first dispensing device on the at least one nozzle surface and wherein thereafter in a first removal process the at least one gas outlet nozzle arranged on the carrier is moved in and / or counter to the cleaning direction relative to the at least one print head, and in particular for removing 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 the at least one nozzle surface of the at least one printhead is ejected in a directional manner. This allows a completely contactless cleaning of the nozzle surface. In particular, this reduces the risk of clogging the nozzles of the print head. As a result, a cleaning of the nozzle itself is unnecessary or at least greatly simplified.

For example, in a discharge process, a coating agent, in particular ink, is then dispensed from at least one nozzle of the at least one print head associated with the at least one nozzle surface and then in a peeling operation the at least one contact element fastened in particular to the at least one carrier is brought into contact, for example, with the nozzle surface, and in particular is then in contact with the at least one nozzle surface in contact relative to the at least one print head in and / or against the cleaning direction and thereby removes the dispensed in the exit process coating agent at least partially from the at least one nozzle surface. This still allows the nozzles of the printhead to be cleaned without it being necessary to move detergent through the nozzles in any direction. Preferably, the method is further distinguished by the fact that, in particular, in a rinsing process, the at least one second dispensing device of the at least one cleaning module arranged in the carrier is moved in and / or counter to the cleaning direction relative to the at least one printhead and at least partially emits liquid cleaning agent the at least one second dispensing device is dispensed in a directed manner, in particular in a direction pointing away from the at least one nozzle surface, onto the collecting device, which is preferably arranged at least partially below the at least one nozzle surface.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Show it:

1 a schematic representation of a roll printing machine;

2 a schematic representation of a roll printing machine with alternative web guide;

2 a schematic representation of a portion of a printing unit with a double row of printheads;

3 a schematic representation of a printing unit with a plurality of nozzle bars, the print heads are arranged in printing positions;

4 a schematic representation of a printing unit with a plurality of nozzle bars whose printheads are arranged in rest positions, in particular maintenance positions, wherein positioning drives are shown interrupted for the sake of clarity;

5 a schematic representation of a part of a cleaning device;

6 a schematic representation of a portion of a cleaning device and a print head;

7 a schematic representation of a 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 alternative trained cleaning device in a representation analogous to that of 8th ,

A printing press 01 has, for example, at least one printing material source 100 , at least a first printing unit 200 , preferably at least a first dryer 301 , preferably at least a 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 roll printing machine 01 formed, more preferably as a roller inkjet printing machine 01 , The printing press 01 is for example as a rotary printing machine 01 designed, for example as a rotary web press 01 , in particular roll-rotary ink-jet printing machine 01 , In the case of a roll printing press 01 is the source of printing material 100 for example as Rollenabspulvorrichtung 100 educated. In the case of a sheet-fed press or sheet-fed rotary printing press, the source of printing material 100 For example, designed as a sheet feeder. In the substrate source 100 At least one printing material is preferred 02 aligned, preferably with respect to at least one edge of this printing substrate 02 , The substrate 02 is for example at least one web-shaped substrate 02 So a printing material web 02 For example, a paper web 02 or a textile railway 02 or a slide 02 , For example, a plastic film 02 or a metal foil 02 , An axial direction A is preferably a direction A, which is parallel to a rotation axis 111 a substrate roll 101 and / or to a rotation axis 207 ; 407 at least one central cylinder 201 ; 401 and / or to an axis of rotation of one in the first printing unit 200 arranged Bedruckstoffleitelements extending.

A transport path of the at least one printing substrate 02 and in particular the printing material 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 printing material 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 on two sides with at least one printed image.

After passing the at least one first printing unit 200 the transport path of the printing material passes through 02 and in particular the printing material web 02 for example, the at least one first dryer 301 to dry the applied ink and / or ink. Ink and / or printing ink is to be understood in the preceding and hereinafter generally a coating composition, in particular also a lacquer. Preferably, the at least one first dryer 301 Part of a dryer unit 300 ,

The following is a roll printing machine 01 described in more detail. However, the same details can be applied to other printing presses as well 01 , for example, sheet-fed presses, provided they do not conflict. Bedruckstoffrollen 101 , which are preferred in the Rollenabspulvorrichtung 100 come used, preferably each have a sleeve on which the web-shaped substrate 02 for use in the roll printing press 01 is wound up. The printing material web 02 preferably has a width of 700 mm to 2000 mm, but may also have an arbitrarily smaller or preferably larger width.

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

The first printing unit 200 is preferably the Rollenabspulvorrichtung 100 with respect to the transport path of the printing material 02 downstream. The first printing unit 200 has, for example, at least a first central pressure cylinder 201 or shortly central cylinder 201 on. If below from a central cylinder 201 the speech is, so is always a pressure cylinder 201 meant. The printing material web 02 preferably wraps around the first central cylinder in a printing operation 201 at least partially. In this case, a wrap angle 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 printing material web 02 with the first central cylinder 201 in contact. The printing material web 02 For example, it wraps around a part of a first deflection roller 203 and is deflected by this so that the transport path of the printing substrate 02 in a first space 204 both tangential to the first guide roller 203 as well as tangent to the first central cylinder 201 runs.

At least one is preferred as the first impression roller 206 trained first cylinder 206 in the first printing unit 200 arranged. In one to the first central cylinder 201 Employed state forms the first impression roller 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, preferably as an electric motor 208 is formed and further preferred 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 itself, a first rotational angle sensor is preferably arranged, which has a rotational angle position of the first drive motor 208 and / or the first central cylinder 201 itself measuring and / or measuring and sending to a higher-level machine control and / or is designed to transmit. The first rotation angle sensor is designed, for example, as a rotary encoder or absolute value encoder. With such a rotation angle sensor is a rotational position of the first drive motor 208 and / or preferably a rotational position of the first central cylinder 201 preferably by means of the higher-level machine control absolutely determinable.

Additionally or alternatively, the first drive motor 208 of the first central cylinder 201 connected in such a circuit with the machine control, that the machine control on the basis of from the machine control to the first drive motor 208 of the first central cylinder 201 predetermined target data to a rotational position of the first drive motor 208 at any time via the rotational position of the first drive motor 208 and thus at the same time the rotational position of the first central cylinder 201 is informed.

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

A nozzle bar 213 is a component that is preferred in the axial direction A over at least 80% and more preferably at least 100% of the working width of the printing press 01 extends and that as a carrier of the at least one print head 212 serves. An axial length of a bale of the at least one first central cylinder is preferred 201 at least as big as the working width of the printing machine 01 , There is a single or several nozzle bars 213 per printing unit 211 arranged. Each nozzle is preferably a clearly defined target area in the direction A of the width of the printing material web 02 and preferably to the direction A, in particular the axis of rotation 207 the at least one first central cylinder 201 related assigned. Each target area of a nozzle is preferably in particular with respect to the circumferential direction of the at least one first central cylinder 201 clearly defined at least in the printing operation. In particular, a target area of a nozzle is that, in particular, substantially rectilinear space area which extends in a direction of ejection of this respective nozzle from this respective nozzle.

The at least one first nozzle bar 213 preferably extends orthogonal to the intended transport path of the printing material 02 preferably over the working width of the printing press 01 , The at least one nozzle bar 213 preferably has at least one row of nozzles. The at least one row of nozzles, viewed in the axial direction A, preferably has the entire working width of the printing press 01 and / or width of the bale of the at least one first central cylinder 201 For example, at regular intervals nozzle openings. In one embodiment, this is a single continuous printhead 212 arranged, extending in the axial direction A over the entire working width of the printing press 01 and / or the entire width of the bale of the at least one first central cylinder 201 extends. The at least one row of nozzles is preferred as at least one linear over the entire width of the printing material web 02 formed in the axial direction A extending juxtaposition of individual nozzles. In another preferred embodiment, several print heads are juxtaposed in the axial direction A. 212 on the at least one nozzle bar 213 arranged. Since usually such individual printheads 212 are not provided with nozzles up to an edge of their housing, are preferably at least two and more preferably exactly two rows of print heads extending in the axial direction A. 212 in the circumferential direction of the first central cylinder 201 arranged offset to one another, preferably so that in the axial direction A successive printheads 212 preferably alternately one of the at least two rows of printheads 212 always preferentially alternately a first and a second of two rows of printheads 212 , Two such rows of printheads 212 form a double row of printheads 212 , Each double row of printheads 212 For example, there are 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 formed as a single linear juxtaposition of nozzles, but results as the sum of a plurality of individual, more preferably two, circumferentially offset from each other arranged juxtaposition of nozzles.

Indicates a printhead 212 multiple nozzles, so form all target areas of the nozzles of this printhead 212 together a workspace of this printhead 212 , Workspaces of Printheads 212 a nozzle bar 213 and in particular a double row of printheads 212 As seen in the axial direction A to each other and / or overlap seen in the axial direction A. In this way, even when not in the axial direction A printhead 212 ensures that seen in the axial direction A at regular and preferably periodic distances target areas of nozzles of the at least one nozzle beam 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 bale 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, a narrow region of the printing material web 02 and / or the bale of the first central cylinder 201 be present, which is not the working area of the nozzle bars 213 belongs. An entire working area of the at least one nozzle bar 213 is preferred from all workspaces of printheads 212 this at least one nozzle bar 213 and is preferably from all target areas of nozzles of these printheads 212 this at least one nozzle bar 213 composed. Preferably, an entire work area corresponds to a double row of print heads 212 seen in the axial direction A the working area of the at least one nozzle beam 213 ,

Preferably, the at least one nozzle bar 213 in the circumferential direction with respect to the at least one first central cylinder 201 and / or in one for the substrate 02 provided transport direction B a plurality of rows of nozzles. Preferably, each printhead 212 a plurality of nozzles, which further preferably in a matrix of a plurality of 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. Such columns are further preferably arranged running obliquely to the circumferential direction, for example, to increase a resolution of a printed image. Thus, in each case one row of nozzles and one column of nozzles preferably enclose an angle other than 90 °. Preferably in a direction orthogonal to the axial direction A, in particular in the transport direction B along the intended transport path of the printing substrate 02 and / or in the circumferential direction relative to the at least one central cylinder 201 several rows of printheads 212 , more preferably four double rows, and more preferably eight double rows of printheads 212 arranged one after the other.

Here are the printheads 212 at least in the printing operation, preferably oriented such that the nozzles of each printhead 212 essentially in the radial direction on 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 ° are to be considered 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 the at least one first central cylinder 201 in a radial direction on 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 the at least one first central cylinder 201 related radial direction. Each double row of printheads 212 Preferably, an ink and / or ink of a particular color assigned and / or assignable, for example, each one of the colors black, cyan, yellow and magenta or a paint, such as a clearcoat. The corresponding inkjet printing unit 211 is preferred as a multi-color printing unit 211 , in particular four-color printing unit 211 designed and allows a one-sided multicolor, especially four-color printing of the printing substrate 02 , It is also possible to have fewer or more different colors with a printing unit 211 to print, for example, additional spot colors. In one embodiment, at least in the printing operation, a plurality of rows of printheads 212 , more preferably four double rows, and more preferably eight double rows of printheads 212 arranged in succession 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 aligned.

The at least one print head 212 works for the production of coating agent drops preferably according to the drop-on-demand method in which coating agent drops are generated selectively if necessary, in particular in selectable droplet size (amplitude modulation). Preferably, at least one piezo element is used per nozzle, which can reduce a volume filled with coating agent at high speed by a certain amount when a voltage and / or change of an applied voltage. 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 coating agent drop. 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 coating agent. With the drop on demand procedure it is possible, a target position of the respective Lack of coating agent on the moving substrate 02 with respect to the circumferential direction of the at least one first central cylinder 201 solely by an emission time point of the respective coating agent drop and a rotational speed of the first central cylinder 201 and / or by the rotational position of the first central cylinder 201 set.

The nozzles of the at least one printhead 212 are arranged such that a distance between the nozzles and on the cylinder jacket surface of the at least one first central cylinder 201 arranged printing material web 02 at least when arranged in a printing position printhead 212 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 rotation angle sensor and / or the high accuracy of the predetermined by the machine control and the first drive motor 208 of the first central cylinder 201 processed target data to the rotational position of the first drive motor 208 of the first central cylinder 201 allows a very accurate orientation and / or knowledge of the position of the substrate web 02 relative to the nozzles and their target areas. A drop flight time between the nozzles and the printing material web 02 is for example by a teach-in process and / or by the known distance between the nozzles and the printing material web 02 and a known drop speed known. From the angular position of the at least one first central cylinder 201 and / or the first drive 208 the at least one first central cylinder 201 , the rotational speed of the at least one first central cylinder 201 and the drop flight time is determined an ideal time to eject a respective drop, so that a passer-sized and / or register-compliant imaging of the substrate web 02 is reached.

In a regular printing operation, all printheads are 212 fixedly arranged. This ensures a permanent passport-oriented and / or register-oriented alignment of all nozzles. There are different situations where a movement of the printheads 212 necessary is. A first such situation is a flying roll change or generally a roll change with gluing or generally a web feed with a thicker location of the web to be recovered. The at least one jet bar 213 is therefore in at least one adjustment direction and / or along at least one travel relative to the axis of rotation 207 the at least one first central cylinder 201 and / or the intended transport path of the printing substrate 02 movable. In this way, the distance can be sufficiently increased, but must be subsequently reduced accordingly again. 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 having an ejection direction, as the inkjet printhead 212 ; 412 trained printhead 212 ; 412 and preferably a plurality of, preferably each having an ejection direction, as inkjet printheads 212 ; 412 trained printheads 212 ; 412 and preferably at least one about a respective axis of rotation 207 ; 407 rotatable printing material guide 201 ; 401 by means of which preferably at least one preferred for web-shaped printing material 02 provided transport path is at least partially fixed and / or fixable.

This is preferably at least one printing material guide element 201 ; 401 within the at least one printing unit 200 ; 400 arranged and / or that is at least one Bedruckstoffleitelement 201 ; 401 as at least one web guide roll and / or a guide roller 203 ; 312 ; 403 and / or as at least one pressure central cylinder 201 ; 401 and / or formed as at least one transmission body.

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

Preferably, a printing head arranged in its printing position is characterized 212 characterized in that at least one nozzle of the at least one print head 212 from a designated transport path for printing material 02 and / or from the printing material 02 and / or from a transfer body and / or from the Bedruckstoffleitelement 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.

Preferably, the at least one print head 212 in particular by means of the at least one positioning device 217 ; 218 ; 219 ; 221 in at least one rest position and more preferably in at least two different rest positions can be arranged. The at least one rest position is formed, for example, as at least one maintenance position and / or as at least one mounting position. A maintenance position is preferably a position in which the at least one print head 212 can be maintained, for example, cleaned and / or aligned and / or stored in a particular secured against contamination and / or drying out state, especially 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 press 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, in the mounting position of an operator, more space is preferably available to the at least one print head 212 to arrive, while in the maintenance position preferably only enough space is available to internal, especially automatically running processes within the printing press 01 To be able to perform, for example, a cleaning of a nozzle surface 232 at least one printhead 212 ,

Preference is given to respective maintenance positions of the printheads 212 characterized in that different, arranged in their respective maintenance positions print heads 212 have different distances to each other, as in their respective printing positions and / or in their respective mounting positions.

In a preferred embodiment, the at least one positioning device 217 ; 218 . 219 ; 221 at least one positioning guide 224 and more preferably a plurality of positioning guides 224 and even more preferably each a positioning guide 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 a plurality of positioning drives 226 and even more preferably each a positioning drive 226 per movable nozzle bar 213 on. For example, every 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. Preferably, the at least one positioning drive 226 arranged such that it has the at least one print head 212 can selectively move to its printing position or its maintenance position or its mounting position.

Preferably, at least four positioning devices are arranged, by means of which in each case at least one nozzle bar 213 and / or in particular more each one of a same ink associated printheads 212 are designed to be movable together. In particular, this can provide configurations in which the printheads 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 ink in a rest position, such as a maintenance position are arranged. This allows, for example, all printheads 212 an ink, such as black, while all printheads 212 other inks are kept in a maintenance position and there protected, for example by suitable means from drying out and / or cleaned.

At least one first locking element is preferably arranged, for example at least one pressure stop. By means of the at least one first locking element is preferably the at least one print head 212 detectable in its printing position, for example by the at least one positioning drive 226 , in particular pneumatic cylinder 226 , the at least one printhead 212 and / or the at least one printhead 212 having nozzle bars 213 pulls against the at least one pressure stop and / or pressed. This ensures that the printing position is reproducible and precisely defined.

Preferably, at least one second locking element is arranged, for example at least one maintenance stop. By means of the at least one locking element is preferably the at least one print head 212 detectable in its maintenance position, for example by the at least one positioning drive 226 , in particular pneumatic cylinder 226 , the at least one printhead 212 and / or the at least one printhead 212 having nozzle bars 213 pulls against the at least one maintenance stop and / or pressed. 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 a travel path of the at least one print head 212 and / or the at least one nozzle beam 213 to allow in particular between printing position and mounting position. At least one is preferably preferred as a cleaning device 222 trained maintenance device 222 as at least one movable stop, in particular designed as a maintenance stop.

In the at least one maintenance position, at least one cleaning device is preferred 222 at least one nozzle of the at least one print head 212 ; 412 assigned and / or assignable and is more 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 opposite to a respective ejection direction of the at least one nozzle and / or arranged.

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 layer of said respective at least one nozzle at the printhead arranged in the at least one maintenance position and / or mounting position 212 on through the axis of rotation 207 ; 407 of at least one, preferably as a central cylinder 201 formed Bedruckstoffleitelements 201 ; 401 fixed axial direction A relative to at most 50%, more preferably at most 20% and even more preferably at most 10% and even more preferably at most 2% of a measured in the axial direction A width of a working area of the at least one print head 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% by maximum with the printing machine 01 Processable substrate width defined working width of the printing press 01 , In an alternative embodiment, the at least one printhead 212 for this at least parallel to the axial direction A moves and the position of these respective at least one nozzle differ in at least one printing position arranged printhead 212 and the location of these respective at least one nozzle at the printhead arranged in the at least one maintenance position and / or mounting position 212 on through the axis of rotation 207 ; 407 of at least one, preferably as a central cylinder 201 formed Bedruckstoffleitelements 201 ; 401 fixed axial direction A related to at least 100% of the measured in the axial direction A 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 maximum with the printing press 01 Processable substrate width defined working width of the printing press 01 ,

Preference is given to arranged in the at least one maintenance position printhead 212 at least one cleaning device 222 between at least one nozzle of the at least one printhead 212 ; 412 and one of these at least one nozzle next area of the for the substrate 02 provided transport path can be arranged and / or arranged and / or is arranged in at least one maintenance position printhead 212 at least one cleaning device 222 between at least one nozzle of the at least one printhead 212 and one of these at least one nozzle next region of a transfer body can be arranged and / or arranged.

The at least one cleaning device 222 preferably has in each spatial direction an extension which is greater than 10 cm, more preferably greater than 15 cm. Preferably, the at least one cleaning device 222 in the axial direction A has an extent which is at least as large as the working range of the at least one nozzle beam 213 in the axial direction A. Preferably, the at least one cleaning device 222 in a transport direction of the printing material 02 an extent that is at least as large as the working area of the at least one nozzle bar 213 in the transport direction of the substrate 02 , As a result, preferably all nozzles of all printheads 212 the at least one nozzle bar 213 be cleaned in one operation. In an alternative embodiment, the at least one cleaning device 222 in the transport direction of the substrate 02 an extent that is at least as large as all working areas of all nozzle bars 213 of the printing unit 211 in the transport direction of the substrate 02 combined. This will allow all nozzles of all printheads 212 of the at least one printing unit 211 be cleaned in one operation.

The at least one nozzle bar 213 is preferably completely independent of such components of the printing press 01 movable, which is the printing material web 02 touching and / or the intended transport of the printing material 02 are arranged tangentially. Thus, a cleaning and / or maintenance can be made without the substrate web 02 to influence and in particular without the printing substrate 02 from the printing press 01 to have to remove.

Preferably, the at least one cleaning device 222 at least orthogonal to the axial direction A movable. A provision path of the at least one cleaning device is preferred 222 by at least one feeder 223 established. Preferably, the at least one feed device 223 as at least one guidance system 223 educated. Preferably, the at least one cleaning device 222 arranged movably along the at least one provision path between at least one parking position and at least one insertion position. Preferably, the further preferably by the at least one feed device 223 fixed provision 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 the measured in the axial direction A width of the 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% by the maximum with the printing press 01 Processable substrate width defined working width of the printing press 01 , Preferably, a distance of the axial movement of the at least one cleaning device 222 at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of the measured in the axial direction A 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% by the maximum with the printing press 01 Processable substrate width defined working width of the printing press 01 , More preferably, the at least one cleaning device 222 exclusively orthogonal to the axial direction A movable. In an alternative embodiment, the at least one cleaning device 222 movably disposed in the axial direction along the at least one providing path between the at least one parking position and the at least one deployed position.

A different position of the at least one cleaning device relative to the axial direction A preferably distinguishes 222 in the parking position of a reference to the axial direction A provided position of the at least one cleaning device 222 in its 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 a measured in the axial direction A width of a 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% by maximum with the printing press 01 Processable substrate width defined working width of the printing press 01 ,

Preferably, the at least one feed device 223 at least one feed drive 229 and / or at least one traction means 228 and / or pushing means 228 on. In one embodiment, the at least one feed drive 229 fixed to a frame 331 the at least one printing unit 200 ; 400 arranged and that is 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, the at least one feed drive 229 in particular together with the at least one cleaning device 222 movably arranged and that is at least one traction means 228 and / or pushing means 228 fixedly arranged and, for example, as at least one rail 228 and / or rack 228 educated. Preferably, the at least one feed drive 229 at least one stepper motor on.

Preference is given to the at least one print head 212 and more preferably, each printhead 212 assigned a unique maintenance item. If the at least one cleaning device 222 is arranged in its use position, 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 is at printhead located in its service position 212 preferably by application of a force by means of the at least one positioning drive 226 and / or by gravity, in particular when the positioning drive is switched off 226 pulled and / or pressed against the cleaning device. This clearly defines the maintenance position. This is enough for a positioning drive 226 and a feed drive 229 to the printheads 212 reproducible and precise in their printing positions, to be able to arrange maintenance positions and mounting positions.

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

Preferred is at least one print head arranged in the printing position 212 at least one nozzle of this at least one printhead 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 insertion position. Preferably, when arranged in the rest position at least one print head 212 this arranged at least one nozzle above this provision path.

A travel of at least one printhead 212 is preferably an example predetermined path along which the at least one print head 212 is movable, in particular to the at least one print head 212 move between its printing position and its rest position, for example, maintenance position and / or mounting position. Preferably, the travel of the at least one print head 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 the measured in the axial direction A 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% by the maximum with the printing press 01 Processable substrate width defined working width of the printing press 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 , in particular drip tray 161 on. This is preferably at least one cleaning module 150 relative to the at least one drip tray 161 movably arranged. Preferably, the at least one cleaning device 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 permanently as part of the first printing unit 211 and / or at least a second printing unit 411 educated. The at least one printing unit 211 ; 411 has at least one print head 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 Anstellantriebs 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 pullers 151 formed, for example, as at least one wiper blade 151 , A wiper 151 or pullers 151 In this case, a component which serves to remove material from this surface by means of a movement maintaining a contact between this component and a surface, for example by pushing away and / or removing and / or absorbing. 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 to be cleaned area 232 in this direction.

This is preferably at least one contact element 151 arranged such that it communicates with 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 at least one Anstellantriebs 152 and / or in and / or against a Anstellrichtung E. The Anstellrichtung E is preferably a direction in and / or opposite to the at least one Anstellantrieb 152 a force is capable of exercising and / or in and / or against which the at least one contact element 151 is movably arranged. In particular, this is at least one contact element 151 by means of the at least one Anstellantriebs 152 in and / or against the Anstellrichtung E movable. A vertical component of the respective setting direction E is preferably larger than an optional horizontal component of the respective setting direction E. Preferably, the respective setting direction E deviates by less than 45 °, more preferably less than 30 ° and even more preferably less than 20 ° from a vertical Direction off. With respect to a mobility in and / or against a certain 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 setting path. In particular, it is possible that end positions or center positions allow movements in one or two directions or that a bias can be present in one direction and a corresponding drive in the other direction or just does not present bias, but at least a two-way drive.

This preferably has at least one cleaning module 150 at least one lever body 153 on and further preferably exactly one lever body 153 each actuating drive 152 and / or exactly one lever body 153 per contact element 151 , The at least one Anstellantrieb 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 carrier 153 designated. Preferably, the at least one lever body 153 with respect to the adjustment direction E between the at least one print head 212 and the at least one Anstellantrieb 152 arranged. This is preferably at least one contact element 151 at a first location of the at least one lever body 153 at this at least one lever body 153 arranged, more preferably attached. Preferably, the at least one lever body 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 foregoing and in the following of at least one carrier 154 the speech is, as well as an assembly of rigid relative to each other arranged carrier elements is meant, which together the at least one carrier 154 form. Preferably, the at least one Anstellantrieb stands 152 at least temporarily at a third location 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 Anstellantrieb 152 at least temporarily at the third location of the at least one lever body 153 with this at least one lever body 153 brought into contact. Preferably, the third position along the at least one lever body 153 arranged between the first location and the second location. In particular, therefore, creates a contact between Anstellantrieb 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 153 preferably reversibly deformable and has the at least one lever body 153 prefers its own restoring force. Preferably, the at least one lever body 153 as at least a spring plate 153 educated. For example, a dimension of the at least one lever body 153 in the adjustment direction E is less than each dimension of the at least one lever body 153 in each orthogonal to the Anstellrichtung E direction. Preferably, based on a direction pointing from the first location to the second location, the third location is located between the first location and the second location.

At least one component of the at least one positioning drive is preferred 152 For example, a housing and / or a cylinder stationary relative to the at least one carrier 154 arranged. More preferably, at least one other component of the at least one Anstellantriebs 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 Anstellantrieb 152 is preferred as at least a 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 , Alternatively or additionally, other drives are also suitable, for example at least one electric and / or magnetic linear drives and / or at least one camshaft. In this context, a cylinder is to be understood as meaning a hollow body in which a piston is movably arranged, irrespective of whether it is a circular cross-sectional shape or not. There are single-acting Anstellantriebe with bias or twice, so acting in opposite directions drives into consideration, in particular single-acting cylinder or double-acting cylinder.

For example, the at least one lever body 153 as a return element 153 formed, preferably at least when activated Anstellantrieb 152 a counter to the Anstellrichtung E acting force on the at least one Anstellantrieb 152 is arranged exercising. Preferably, the at least one Anstellantrieb 152 and the at least one lever body 153 at least temporarily spaced from each other and / or arranged. For example, the limits at least one Anstellantrieb 152 the at least one lever body 153 only against the Anstellrichtung E in the freedom of movement. In particular, the at least one lever body 153 in at least one direction, in particular the adjustment direction E relative to each part of the Anstellantriebs 152 movable. Thus, when the positioning drive is deactivated, a low level of decency between the positioning drive is preferred 152 and lever body 153 available.

In addition to the at least one Anstellantrieb 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 in contact guide element 156 arranged by the Anstellrichtung E a Anstellwegs the at least one contact element 151 is predetermined. Preferably, this is at least one guide element 156 at least a fourth point at least temporarily with the at least one lever body 153 and / or the at least one contact element 151 is in contact and is at least a fourth location closer to the first location than the second location, and more preferably closer than the third location. More preferably, the first location is located between the third location and the fourth location. 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 153 at the second location in at least one compensation direction F movable with the at least one carrier 154 connected and to the at least one carrier 154 stored. For example, this compensation direction F has at least one component that is oriented orthogonally to the adjustment direction E. As a result, that end of the at least one lever body 153 to which the at least one contact element 151 is arranged to be moved almost or completely linear, for example, if due to large Anstellwege the at least one contact element 151 otherwise due to a pivotal movement, a wedging in the at least one guide element 156 to be feared. For example, the at least one lever body 153 at least one elongated shaped hole having at least one on the at least one carrier 154 arranged screw cooperates accordingly. However, preference is the Anstellweg the at least one contact element 151 so short that such problems do not occur, but the movement of the at least one contact element 151 is substantially or at least approximately linear. Preferably, by the at least one Anstellantrieb 152 realizable Anstellweg the at least one Kotaktelements 151 a length of 2 mm to 3mm. However, this setting path is more preferably during a cleaning process of the at least one nozzle surface 232 not fully exploited, because before already a contact between nozzle surface 232 and contact element 151 occurs. In an alternative embodiment, the at least one lever body 153 in the second place fixed to the at least one carrier 154 connected, in particular then is the at least lever body 153 is rigid at one end relative to at least one component of the at least one Anstellantriebs 152 arranged.

For example, after a hiring of the at least one contact element 151 to the at least one nozzle surface 232 Preferably, a wiping movement or removal movement takes place. For this purpose, at least one cleaning drive is preferred 157 and at least one cleaning guide 168 arranged. Preferably, these are 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 relative to each other movable. Preferably, the at least one carrier 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 relative to each other movable, 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 is arranged movably in and / or opposite to the cleaning direction G. Preferably, the at least one cleaning drive 157 as at least a belt drive 157 educated. Alternatively or additionally, the at least one cleaning drive is at least one spindle drive 157 educated. Preferably, the at least one cleaning drive 157 at least one servomotor. 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 G is preferably orthogonal to one for the printing substrate 02 intended transport direction B oriented. Preferably, the cleaning direction G is oriented parallel to the axial direction A. Preferably, the cleaning direction deviates from a horizontal direction by at most 30 °, and more preferably, the cleaning direction G is aligned horizontally.

In particular around several nozzle surfaces 232 of the at least one printhead 212 and preferably a plurality of nozzle surfaces 232 neighboring printheads 212 to clean at the same time, has the at least one cleaning device 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, which further preferably each have their own Anstellantrieb 152 and / or a separate lever body 153 assigned. For example, this has at least one cleaning module 150 in the for the printing material 02 provided transport direction B a plurality of contact elements 151 in succession, which are additionally arranged offset in the axial direction A and / or the cleaning direction G partially offset from each other, for example, for reasons of space and / or because the print heads 212 even arranged offset accordingly. Preferably, a total number of contact elements corresponds 151 of the at least one cleaning module 150 a total of in the for the substrate 02 provided transport direction B in a row arranged printheads 212 or rows of printheads 212 ,

A plurality of print heads arranged in succession in the axial direction A and / or the cleaning direction G 212 is preferably by means of a common contact element 151 cleaned. Depending on whether based on the Anstellrichtung E, the nozzle surfaces 232 this successively arranged printheads 212 the at least one cleaning module 150 and in particular the respective contact element 151 next components of the printheads 212 or not, can the Anstellantrieb 152 for multiple printheads 212 be left in a same position or it is necessary when moving the respective contact element 151 from a nozzle surface 232 to the next addition, the contact element 151 active from the one nozzle surface 232 shut off and after the next nozzle surface 232 to hire. That is why it is preferred for every printhead 212 the nozzle surface 232 the component of the respective printhead 212 that the at least one cleaning module 150 and preferably in printing operation the printing substrate 02 is arranged closest.

Usually, a single activation of contact elements 151 not necessary, but a cleaning process usually affects all printheads 212 of the corresponding printing unit 211 , Therefore, the plurality of contact elements is preferred 151 together with the at least one carrier 154 movably arranged in and / or opposite to the cleaning direction G, in particular relative to the at least one print head 212 , Further preferred is the plurality of Anstellantrieben 152 via at least one and preferably exactly one common supply line, in particular pneumatic supply line simultaneously activated. Alternatively, however, is also conceivable, each contact element 151 can do individually, for example by each Anstellantrieb 152 is individually activated formed. Regardless of the common or separate activation of Anstellantriebe 152 have in a direction orthogonal to the cleaning direction G adjacent Anstellantriebe 152 preferably Anstellrichtungen E, which differ by preferably at least 2 ° and preferably at most 10 ° from each other. As a result, the Anstellrichtungen E to the orientations of the nozzle surfaces 232 neighboring printheads 212 adapted, for example, as described to the central cylinder 201 are arranged around.

The at least one collecting device 161 preferably has at least one bottom 176 , at least one sidewall 177 and preferably at least one, more preferably at least two lateral shields 178 on. The side shields 178 are preferably used to shield components that should not possibly come into contact with detergent and / or coating agent, 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 thus protected, for example against mechanical damage. Preferably, the at least one collecting device 161 in the cleaning direction G has a dimension which is greater than the working range of the at least one nozzle bar 213 , As a result, in particular within the at least one collecting device 161 sufficient 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, one is preferably the at least one collecting device 161 upward limiting cover 173 arranged.

This 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 printhead 212 apply and remove from it. Alternatively or preferably in addition to the at least one contact element 151 At least one non-contact variant is preferably provided for removal. This preferably has at least one cleaning module 150 at least one in particular with its discharge opening 166 on the at least one print head 212 aligned and / or alignable first dispenser 158 for cleaning up. This preferably has at least one cleaning module 150 at least one on the at least one print head 212 ; 412 oriented and / or orientable 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 , in particular first spray opening 166 the at least one first dispensing device 158 in a direction with at least one component on the at least one outlet opening 162 the at least one gas outlet nozzle 159 arranged to be pointing. The cleaning agent is preferably designed as at least partially liquid cleaning agent.

The at least one gas outlet nozzle 159 is preferred as at least one gas meter 159 , in particular as at least one air knife 159 educated. A gas meter 159 is preferably a gas outlet nozzle 159 , whose outlet opening 162 or totality of outlet openings 162 in a longitudinal direction of the outlet opening 162 designated first direction substantially, for example, at least ten times, preferably at least fifty times greater than in an orthogonal to the first direction, as the transverse direction of outlet opening 162 designated second direction. The at least one outlet opening 162 the at least one gas outlet nozzle 159 For example, in its longitudinal direction, it has 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). The at least one outlet opening 162 the at least one gas outlet nozzle 159 For example, in its transverse direction, it has 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 , in particular air knife 159 a gas flow, in particular air flow is generated, which is preferably laminar and, for example, resembles a blade. The gas stream extends substantially while maintaining its dimensions orthogonal to the flow direction, for example, even up to a distance of several centimeters from the outlet opening.

Preferably, the at least one outlet opening 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 by means of at least one blower of at least one supply line 174 fed. The blower 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 outlet opening 162 the at least one gas outlet nozzle 159 subsequently. A straight-line connection preferably has one of the at least one outlet opening 162 the at least one gas outlet nozzle 159 facing the end of at least one curved Leifläche 167 with one of these at least one outlet opening 162 opposite end of this at least one guide surface 167 in a direction that has at least one component, with respect to the cleaning direction G of this at least one gas outlet nozzle 159 to the at least one first dispensing device 158 has. A distance of the at least one guide surface 167 to the at least one nozzle surface is preferably at least 2 mm at any time. Preferably, the at least one guide surface 167 several nozzle surfaces 232 different, not parallel aligned printheads 212 assigned and therefore varies the distance from printhead 212 to printhead 212 ,

Through this at least one curved guide surface 167 is preferably a deflection of the exiting gas flow at the at least one curved guide surface 167 along causes. This diversion is also known as the Coanda effect. As a result, in particular, a flow direction of the gas flow along the at least one nozzle surface 232 of the at least one printhead 212 ; 412 realizable, more preferably one 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 For example, has 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 °. This allows a corresponding gas flow almost or completely parallel to this at least one nozzle surface 232 of the printhead 212 ; 412 be aligned and very close to the at least one nozzle surface 232 of the printhead 212 ; 412 be introduced, in particular because no gas flow-aligning component 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 the end of at least one guide surface 167 preferably has a tangent surface whose surface normal forms 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 opposite end of the at least one guide surface 167 preferably has a tangent surface whose surface normal forms 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 stream moves freely. When arranging the at least one curved guide surface 167 this effective exit direction is the direction in which the at least one guide surface 167 deflected gas stream flows after passing the at least curved guide surface 167 has left seen in his direction of movement. Without 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 into which the at least one gas outlet nozzle 159 with your outlet 162 has. Preferably, the effective exit direction with at least one component parallel to the at least one nozzle surface 232 and more preferably with a lower component on the at least one printhead 212 ; 412 to. The outlet opening 162 the at least one gas outlet nozzle 159 on the other hand, preferably has a component on the at least one print head 212 ; 412 which is larger than a component with which it is parallel to the at least one nozzle surface 232 is aligned.

Preferably, therefore, this has at least one printing unit 211 at least one print head 212 and at least one cleaning device 222 with at least one cleaning module 150 on, wherein the at least one printhead 212 and that at least one cleaning module 150 in and / or against the cleaning direction G are arranged relative to each other movable and wherein the at least one cleaning module 150 the at least one in particular with its discharge opening 166 in one direction with at least one component on the at least one printhead 212 ; 412 aligned and / or alignable first dispenser 158 , in particular 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 oriented and / or orientable gas outlet nozzle 159 having.

Preferably, the at least one first discharge opening 166 the at least one first dispensing device 158 and the exit opening 162 the at least one gas outlet nozzle 159 at least in the cleaning direction G 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, the at least one contact element 151 and / or the at least one lever body 153 and / or the at least one Anstellantrieb 152 between the at least one first dispensing opening 166 the at least one first dispensing device 158 and the exit opening 162 the at least one gas outlet nozzle 159 to arrange. At least the at least one contact element is preferred 151 with respect to the cleaning direction G between the at least one first dispensing opening 166 the at least one first dispensing device 158 and the at least one outlet opening 162 the at least one gas outlet nozzle 159 arranged. More preferably, the at least one lever body 153 and / or the at least one Anstellantrieb 152 with respect to the cleaning direction G between the at least one first dispensing opening 166 the at least one first dispensing device 158 and the at least one outlet opening 162 the at least one gas outlet nozzle 159 arranged.

Preferably, an outlet direction of the at least one first dispensing device 158 with respect to the cleaning direction G, a component which on the at least one contact element 151 to assign. Preferably, an outlet direction of the at least one gas outlet nozzle 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 effluent gas and / or the effective outlet direction of the at least one gas outlet nozzle 159 with respect to the cleaning direction G, a component which on the at least one contact element 151 to assign. Preferably, this is at least one contact element 151 in a target area of the at least one dispenser 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.

Preferably, the at least one first dispensing device 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 relative to each other movable. More preferably, the at least one first dispensing device 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 movably arranged. Such a relative movement is preferred by an absolute movement of the at least one cleaning module 150 realizable.

Preferably, the at least one first dispensing device 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 Anstellantrieb 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 dispensing device 158 and / or the at least one gas outlet nozzle 159 and / or the at least one Anstellantrieb 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 opposite to the cleaning direction G relative to the at least one print head 212 and relative to the frame 231 of the at least one printing unit 211 movably arranged, for example by means of 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 is arranged movably in and / or opposite to the cleaning direction G.

Preferably, this has at least one printing unit 211 four cleaning devices 222 on the each a catcher 161 and a cleaning module 150 each cleaning module 150 four contact elements 151 , four actuators 152 , four lever bodies 153 , a first dispenser 158 , a gas outlet nozzle 159 and two second dispensers 163 having.

This preferably has at least one cleaning module 150 at least one, for example as a second spray nozzle 163 trained second dispenser 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 their example as the second spray opening 164 formed second discharge opening 164 in a direction with at least one of the at least one printhead 212 pointing away component oriented and / or arranged alignable. More preferably, the at least one second dispensing device 163 with its second delivery port 164 , in particular spray opening 164 For example, at least partially from the top of the at least one collecting device 161 , in particular drip tray 161 oriented and / or arranged alignable. The at least one second delivery device is preferred 163 relative to the at least one catcher 161 arranged movably and / or on the at least one carrier 154 arranged.

This 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. The at least one lower spray shield 169 ; 171 serves preferably to a Einwirkbereich the at least one second dispenser 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 in addition, the area of action of the at least one second delivery device 163 in the cleaning direction G and preferably serves the at least one second lower spray shield 171 in addition, the area of action of the at least one second delivery device 163 to limit against the cleaning direction G. In this way, other components of the at least one cleaning module 150 from the second dispenser 163 dispensed cleaning agent and in connection therewith from the at least one collecting device 161 bouncing cleaner 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 150 arranged and movable together with this. An ejection direction preferably has the at least one second dispensing device 163 at least one vertically downwardly facing component and at least one horizontally opposite or preferably in the cleaning direction G facing component. For example, the at least one second dispensing opening 164 with respect to the cleaning direction G on the at least one gas outlet nozzle 159 arranged 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 arranged. Preferably, one of these positions is 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. Preferably, at least one of these positions is a first working position or a second working position, which in each case is characterized, for example, in that individual components of the at least one cleaning module are present at this position 150 be activated or deactivated, for example, the at least one first dispensing device 158 and / or the at least one gas outlet nozzle 159 and / or the at least one Anstellantrieb 152 and / or the at least one second dispensing 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, at times, a cleaning of the at least one contact element 151 is made. Preferably, at least one maintenance position is almost or completely identical to the basic position.

In the following, a preferred embodiment of a method for cleaning the at least one nozzle surface 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 first of a substrate 02 and / or from a Bedruckstoffleitelement 201 removed and / or in particular by means of at least one positioning device 217 ; 218 ; 219 ; 221 arranged from at least one printing position in at least one rest position, in particular maintenance position, for example by a distance between the at least one print head 212 and for the substrate 02 provided transport path is increased. After that, at least one cleaning device is preferred 222 moved along the deployment path and between at least one nozzle of the at least one printhead 212 and one of these at least one nozzle next area for the substrate 02 provided transport path and / or between at least one nozzle of the at least one print head 212 and one of these at least one nozzle next region of a transmission body, in particular the central cylinder 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 moves. The at least one cleaning device is preferred 222 for at least orthogonal to the Anstellrichtung E moves. The at least one cleaning device is preferred 222 at least parallel to that for the substrate 02 provided transport direction B moves. In an alternative embodiment, the at least one cleaning device 222 for this at least parallel to the axial direction A and / or the cleaning direction G moves. The at least one cleaning device is preferred 222 along the at least one provision path from the at least one parking position of the cleaning device 222 in the at least one use 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 printhead 212 moved against the Anstellrichtung E, in particular lowered. This optionally performed movement 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 maintenance position. In this way, for example, a seal of a cleaning room can be made, for example, at least from the at least one print head 212 and the at least one collecting device 161 is limited and preferably airtight is completed.

In an activation process preferably carried out thereafter, 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. In the first working position, a application process is preferably started.

In the application process, the at least one on the at least one carrier is preferred 154 arranged first dispensing 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 in the cleaning direction G moves. As a result, the at least one of the at least one carrier also becomes 154 arranged first dispensing device 158 of the at least one cleaning module 150 in the cleaning direction G relative to the at least one printhead 212 moves and is doing at least the at least partially liquid detergent by means of at least one first dispenser 158 preferably at least half and, more preferably, the entire at least one nozzle surface 232 applied. Preferably, the application process ends as soon as the at least one cleaning module has reached the second working position.

Thereafter, in at least one first removal process, the cleaning agent and / or dissolved contaminants, such as, for example, coating agent residues and / or printing material parts, are at least partially and preferably completely again from the at least one nozzle surface 232 away. For this purpose, the at least one gas outlet nozzle is preferred 159 activated. It is thus preferred to start gas or a gas mixture from the at least one gas outlet nozzle 159 eject. The beginning of this ejection is preferably carried out while the at least one cleaning module 150 located in the second working position. It is also possible that at least one cleaning module 150 first in or opposite to the cleaning direction G to move to another position and there to start with the expulsion of the gas or gas mixture. In the first removal operation, the at least one becomes on the carrier 154 arranged gas outlet nozzle 159 in and / or preferably opposite to the cleaning direction G relative to the at least one print head 212 ; 412 emotional. In this case, it is preferable to remove at least the cleaning agent and / or the dissolved contaminants 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 of the at least one nozzle surface 232 of the at least one printhead 212 ; 412 directed component ejected and preferred by the at least one guide surface 167 at least partially diverted. By the gas flow, the at least one cleaning agent and / or the dissolved contaminants from the at least one nozzle surface 232 away. A part of the cleaning agent can, for example, evaporate and be sucked off. The at least one cleaning agent and / or the dissolved contaminants is and / or are preferably at least partially entrained by the gas stream and in the at least one collecting device 161 transported where it is collected and / or preferably flows to a drain. The first removal process is terminated, for example, when the at least one cleaning module 150 is again in or near the first working position.

By the application process and the first removal process, the at least one nozzle surface is preferred 232 Freed from contamination, which is preferably largely avoided by the direction of the gas flow, detergent and / or dirt and / or ink from the outside into the nozzles of the at least one print head 212 to transport.

A cleaning of at least one nozzle and / or nozzle opening of the at least one print head is preferably carried out subsequently 212 , For this purpose, a coating agent, in particular ink or ink from at least one of the at least one nozzle surface is preferably first in an exit process 232 associated nozzle of the at least one printhead 212 delivered, more preferably from all the nozzles of the at least one printhead 212 , This coating agent pushes out dirt and / or cleaning agents that might have entered the nozzles. Also possibly dried coating agent within the nozzles is preferably pressed outward. An amount of dispensed coating agent is preferably kept as low as possible, for example, by only so much coating agent is dispensed that results in each nozzle an outwardly arched drop that does not dissolve by itself from the nozzle. If, however, more coating agent is dispensed so that drops detach, they are preferred by the catcher 161 collected.

A second removal process, which is also called a removal process, is then preferably carried out in order to remove the dispensed coating agent. For this purpose, the at least one positioning drive is preferred 152 activated and / or the at least one in particular on the at least one carrier 154 fixed contact element 151 first 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 preferred in the cleaning direction G moves. In this case, the coating agent, for example ink, discharged in the discharge process is at least partially offset from the at least one nozzle surface 232 away. Preferably, the movement 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 respectively corresponding at least one nozzle surface 232 stay in contact. Having at least one nozzle surface in this way 232 and preferably all in the cleaning direction G successively arranged nozzle surfaces 232 have been treated, this will be 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 Anstellantriebs 152 in conjunction with the restoring force, for example, of the at least one lever body 153 and / or by reverse activation of the at least one Anstellantriebs 152 , The at least one cleaning module is preferred 150 then against the cleaning direction G in its basic position within the at least one cleaning device 222 moved back.

For example, in a rinsing process, it is preferred that the at least one is preferably attached to the carrier 154 of the at least one cleaning module 150 arranged second dispensing device 163 of the at least one cleaning module 150 in and / or against the cleaning direction G relative to the at least one print head 212 ; 412 moves, for example, by turning the cleaning module 150 is moved in accordance with in and / or opposite to the cleaning direction G. In particular, at least partially liquid cleaning agent from the at least one second dispensing device is preferred 163 preferably on the at least one collecting device 161 directed delivered, in particular in one of the at least one nozzle surface 232 pointing away direction. Preferably, the at least one collecting device 161 at least partially below the at least one nozzle surface at least at this time 232 arranged. By the at least one horizontally opposite or preferably in the cleaning direction G facing component of the ejection direction of the at least one second dispenser 163 and / or by an inclination of a bottom surface of the at least one collecting device 161 and / or by a corresponding movement of the cleaning module 150 is liquid cleaning agent and / or coating agent and / or dissolved contaminants along the catcher 161 preferably transported to at least one outflow. The at least one cleaning module is preferred 150 then against the cleaning direction G in its basic position within the at least one cleaning device 222 moved back. Alternatively, the rinsing process is carried out during the movement with which the at least one cleaning module 150 after the second removal process back to the home position and / or against the cleaning direction G is moved.

For example, when arranged in the at least one maintenance position cleaning module 150 is preferred thereafter a cleaning of the at least one contact element 151 performed. Preferably, first in a first Sub-operation of a maintenance process, the at least one cleaning module 150 with respect to the cleaning direction G is positioned in a first maintenance position such that the at least one contact element 151 in the cleaning direction G between the at least one first dispensing device 158 and the at least one upper spray shield 172 is arranged. Optional and preferred is the at least one contact element 151 moved in the Anstellrichtung E, for example, to further in a target area of the at least one first dispensing device 158 to arrive and to improve a shield. Thereafter, in a second sub-process of the maintenance process, the at least one first dispensing device is preferred 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 dispensing device 158 this will be at least one contact element 151 preferably again moves against the Anstellrichtung E.

Thereafter, in a third sub-process of the maintenance process, the at least one cleaning module is preferred 150 in the cleaning direction G moves, 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 in the connection, the at least one contact element 151 with respect to 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 arranged in a second maintenance position. Optional and preferred is the at least one contact element 151 moved in the Anstellrichtung E, for example, to further in a target area of the at least one gas outlet nozzle 159 to arrive and to improve a shield. Thereafter, in a fourth sub-process of the maintenance process, the at least one gas outlet nozzle is preferred 159 activated. As a result, this becomes at least one contact element 151 exposed to the exiting air flow. A part of the cleaning agent can, for example, evaporate and be sucked off. The at least one cleaning agent and / or the dissolved contaminants is and / or are preferably at least partially entrained by the gas stream and in the at least one collecting device 161 transported where it is collected and / or preferably flows to a drain. After deactivation of the at least one gas outlet nozzle 159 this will be at least one contact element 151 preferably again moves against the Anstellrichtung E. After that, at least one cleaning module is preferred 150 again moved against the cleaning direction G in the first maintenance position or home position.

Preferably, an operator can influence which processes of the method are carried out and which are not and whether, if appropriate, individual operations are to be carried out. The maintenance process is preferably performed in each case.

Preferably, the at least one first dispensing device 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 in total in the at least one, in particular at least the first maintenance position with respect to the cleaning direction G of the at least one print head 212 spaced apart. This is preferably at least one cleaning module 150 in the at least one maintenance position with respect to the setting direction E of the at least one cover 173 covered, for example, to be protected against drying and / or from dirt and / or damage.

After the printing material web 02 the at least one first printing unit 200 has happened, the printing substrate 02 transported further along their transport path 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 printing material web 02 is preferably at least a second printing unit 400 arranged. The transport path of the printing material 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 , Within 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 arranged aligned. The at least one 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 beam 413 , at least one, as an ink jet 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 beam 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 a second printing unit 411 as a multi-color printing unit 411 , in particular four-color printing unit 411 educated. With regard to the transport path of the printing material 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 is preferably similar to the construction of the at least one first dryer 301 ,

In at least one variant of the printing press is the printing press 01 as a roll-rotation ink-jet printing machine 01 formed and is at least one transmission body with the at least one first pressure central cylinder 201 a transmission gap forming arranged. Then the at least one printhead is preferred 212 aligned with the at least one transmission body. The central pressure cylinder 201 is preferably formed as a counter-pressure cylinder in this case.

Preferably, the at least one first pressure central cylinder 201 a for supporting a printing material web 02 in a first transmission region, in particular a first transmission region for coating means serving motorized rotary body 201 , Preferably, the at least one second pressure cylinder is central 401 a for supporting a printing material web 02 in a second transmission region, in particular a second transmission region for coating means serving motorized rotary body 401 , Preferably, the first and / or the second transfer region is an area which is provided for a contact between printing material 02 and 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 printhead arranged in a printing position 212 and / or an entire work area of at least one nozzle bar 213 and / or a gap of the respective pressure central cylinder 201 ; 401 is formed with an optionally arranged transfer body.

LIST OF REFERENCE NUMBERS

01

 Printing Machine, Inkjet Printing Machine, Rolling Printing Machine, Rolling Inkjet Printing Machine, Rotary Printing Machine, Rolling Rotary Printing Machine, Rolling Rotary Inkjet Printing Machine

02

 Substrate, substrate web, paper web, textile web, film, plastic film, metal foil

100

 Substrate source, roll-off device, reel splicer

101

 printing material

111

Rotation axis ( 101 ; 103 )

150

Cleaning module ( 222 )

151

 Contact element, wiper, puller, wiper blade

152

 adjusting drive

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 meter, air knife

160

161

 Collecting device, drip tray

162

Outlet opening ( 159 )

163

 Dispenser, spray nozzle, second

164

Dispensing opening, spray opening, second ( 163 )

165

166

Discharge opening, spray opening, first ( 158 )

167

 baffle

168

 cleaning guide

169

 Spray shield, lower, first

170

171

 Spray shield, lower, second

172

 Spray shield, upper

173

 cover

174

 supply

175

176

 ground

177

 Side wall

178

 sign

200

 Printing unit, first

201

 Central pressure cylinder, central cylinder, first; body of revolution

202

203

 Roller, guide roller

204

Gap ( 201 ; 203 )

205

206

 Cylinder, impression roller, first

207

Rotation axis ( 201 )

208

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

209

 Impression gap, first

210

211

 Printing unit, ink-jet 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

 Feeding device, guidance system

224

 positioning guide

225

226

 Positioning drive, electric motor, hydraulic cylinder, pneumatic cylinder

227

228

 Traction means, thrust means, chain, rail, rack

229

 feed drive

230

231

Rack ( 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

 Printing unit, second

401

 Central pressure cylinder, central cylinder, second; body of revolution

408

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

409

410

411

 Printing unit, inkjet printing unit, inkjet 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, rewinder, sheet cutter, plan delivery

A

 Direction, axial

B

 transport direction

e

 setting direction

F

 compensation direction

G

 cleaning direction

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102011076899 A1 [0004]
• WO 2013/134737 A1 [0007]
• EP 2233294 B1 [0008]
• US 2010/0079539 A1 [0009]
• US 2011/0074869 A1 [0010]

Cited non-patent literature

• DIN 16500-2 [0003]

Claims (15)

Printing unit ( 211 ; 411 ), whereby the printing unit ( 211 ; 411 ) at least one print head ( 212 ; 412 ) and at least one cleaning device ( 222 ) with at least one cleaning module ( 150 ) and wherein the at least one print head ( 212 ; 412 ) and the at least one cleaning module ( 150 ) in and / or against a cleaning direction (G) are arranged movable relative to each other and wherein the at least one cleaning module ( 150 ) at least one on the at least one print head ( 212 ; 412 ) aligned and / or alignable first dispensing device ( 158 ) for cleaning agents, characterized in that the at least one cleaning module ( 150 ) at least one on the at least one print head ( 212 ; 412 ) aligned and / or orientable gas outlet nozzle ( 159 ) having. Printing unit according to claim 1, characterized in that the at least one first dispensing device ( 158 ) and an outlet opening ( 162 ) of the at least one gas outlet nozzle ( 159 ) are spaced apart at least in the cleaning direction (G). Printing unit according to claim 1 and / or 2, characterized in that the at least one first dispensing device ( 158 ) as at least a first spray nozzle ( 158 ) is trained. Printing unit according to claim 1 and / or 2 and / or 3, characterized in that the at least one first dispensing device ( 158 ) and / or the at least one gas outlet nozzle ( 159 ) on the one hand and the at least one print head ( 212 ; 412 ) are arranged on the other hand movable relative to each other. Printing unit according to claim 1 and / or 2 and / or 3 and / or 4, characterized in that the at least one cleaning module ( 150 ) at least one second delivery device ( 163 ) for cleaning agents with their discharge opening ( 164 ) of the at least one print head ( 212 ; 412 ) is oriented away and / or arranged alignable. Printing unit according to claim 5, characterized in that the printing unit ( 201 ; 401 ) at least one collecting device ( 161 ) and that the at least one second dispensing device ( 163 ) with its discharge opening ( 164 ) to the at least one collecting device ( 161 ) is aligned and / or arranged alignable. Printing unit according to claim 6, characterized in that the at least one second dispensing device ( 163 ) relative to the at least one collecting device ( 161 ) is arranged movable. Printing unit according to 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 gas outlet nozzle ( 159 ) as a gas meter ( 159 ) is trained. Printing unit according to 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 at least one curved guide surface ( 167 ) in an outlet direction of the at least one gas outlet nozzle ( 159 ) to at least one outlet opening ( 162 ) of the at least one gas outlet nozzle ( 159 ) is arranged subsequently. Printing unit according to claim 1 and / or 2 and / or 3 and / or 4 and / or 5 and / or 6 and / or 7 and / or 8 and / or 9, characterized in that the at least one cleaning module ( 150 ) at least one contact element ( 151 ), which by means of at least one Anstellantriebs ( 152 ) with at least one nozzle surface ( 232 ) of the at least one print head ( 212 ; 412 ) is brought into contact. Printing unit according to claim 10, characterized in that the at least one contact element ( 151 ) with respect to the cleaning direction (G) between the at least one first dispensing device ( 158 ) and the at least one outlet opening ( 162 ) of the at least one gas outlet nozzle ( 159 ) is arranged. Printing unit according to claim 10 and / or 11, characterized in that the at least one contact element ( 151 ) at a first location of at least one lever body ( 153 ) on this at least one lever body ( 153 ) is arranged and that the at least one lever body ( 153 ) at a second location this at least one lever body ( 153 ) on the at least one support ( 154 ) is mounted and that the at least one Anstellantrieb ( 152 ) at least temporarily at a third location of the at least one lever body ( 153 ) with this at least one lever body ( 153 ) is in contact and / or can be brought and that along the at least one lever body ( 153 ) the third location is located between the first location and the second location. Method for cleaning at least one nozzle surface ( 232 ) at least one printhead ( 212 ; 412 ) of a printing unit, wherein in an application process at least one on a support ( 154 ) arranged first delivery device ( 158 ) at least one cleaning module ( 150 ) in a cleaning direction (G) relative to the at least one print head ( 212 ; 412 ) is moved while at least one cleaning agent by means of the at least one first dispensing device ( 158 ) on the at least one nozzle surface ( 232 ) is applied and wherein thereafter in a first removal process at least one on the carrier ( 154 ) arranged gas outlet nozzle ( 159 ) in and / or opposite to the cleaning direction (G) relative to the at least one print head ( 212 ; 412 ) is moved and thereby from at least one outlet opening ( 162 ) of the at least one gas outlet nozzle ( 159 ) at least one gas or gas mixture on the at least one nozzle surface ( 232 ) of the at least one print head ( 212 ; 412 ) is ejected. A method according to claim 13, characterized in that thereafter in a discharge operation, a coating agent from at least one of the at least one nozzle surface ( 232 ) associated nozzle of the at least one print head ( 212 ; 412 ) and that thereafter in a peeling operation at least one contact element ( 151 ) with the at least one nozzle surface ( 232 ) in contact relative to the at least one print head ( 212 ; 412 ) is moved in and / or counter to the cleaning direction (G) and thereby at least partially dispensed from the at least one nozzle surface ( 232 ) Will get removed. A method according to claim 13 and / or 14, characterized in that in a rinsing process at least one of the carrier ( 154 ) second dispensing device ( 163 ) of the at least one cleaning module ( 150 ) in and / or opposite to the cleaning direction (G) relative to the at least one print head ( 212 ; 412 ) and thereby cleaning agent from the at least one second dispensing device ( 163 ) to a collecting device ( 161 ).

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