DE102014208893B4 - printing press - Google Patents

Abstract

Printing press (01), wherein the printing press (01) has at least one printing unit (200; 400), which has at least two print heads (412, 212) and at least one axis of rotation (207; 407) that can be rotated about an axis of rotation (207; 407) that defines an axial direction (A). printing material guide element (201; 401) and wherein each of the at least two print heads (212; 412) is arranged to be movable along a respective linear adjustment path by means of a respective positioning device (217; 218; 219; 221) assigned at least to this print head (212; 4 12). and wherein the linear adjustment paths point in respective adjustment directions, which differ in pairs by at least 10° and at most 150°, and wherein each of the at least two print heads (212; 412) can optionally be at least can be arranged either in a printing position assigned to it or at least in a maintenance position assigned to it, and in the at least one maintenance position of a first print kheads (212; 412) of the at least two print heads (212; 412), at least one maintenance device (222) is and/or can be assigned to at least one first nozzle of this at least one first print head (212; 412), and the at least one maintenance device (222) by means of at least one feed device (223) is arranged to be movable along at least one supply path between at least one parking position and at least one use position exclusively orthogonally to the axial direction (A), and wherein the maintenance device (222) is designed as at least one cleaning device (222) and the at least one cleaning device (222 ) has at least one cleaning module (150) that can be moved in and/or counter to the axial direction (A) relative to the at least one print head (212; 412), characterized in that the respective supply path runs linearly and in a direction that extends from a horizontal Direction deviates by at most 10° and that 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 for cleaning agents.

Description

The invention relates to a printing machine according to the preamble of claim 1.

Various printing methods are known which can be used in printing presses. One such printing method is inkjet printing. In this case, individual drops of printing ink are ejected from nozzles of print heads and transferred to a printing material in such a way that a printed image results on the printing material. Different print images can be created by individually controlling a large number of nozzles. There is no fixed printing form and it is therefore possible to design each individual printed 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 on printing forms.

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

through the EP 2 202 081 A1 and the JP 2003-063707 A a printing press is known in each case, the printing press having a first printing unit and a dryer, the first printing unit having a central cylinder with its own drive motor assigned to the first central cylinder and at least one inkjet print head.

through the U.S. 5,566,616 A a printing press is known which has a rotatable central cylinder, ink jet print heads, a cooling device and a dryer which works either with temperature and draft or with radiation-induced crosslinking.

through the U.S. 6,053,107 A a printing machine is known which has a driven central cylinder and a dryer with a cooling device.

through the DE 10 2011 076 899 A1 a printing machine is known which has at least one printing unit and at least one print head designed as an inkjet print head.

through the DE 10 2010 001 146 A1 and the DE 43 18 299 A1 a threading-in means for threading web-shaped printing material into a printing press is known in each case. through the EP 1 197 329 A1 a webbing tip is known which can interact with a webbing tape or a webbing chain. through the US 2011/0043554 A1 a printing machine is known in which at least one printing material guide element is removed from at least one print head in order to draw in a material web.

through the DE 10 2004 017 801 A1 , the U.S. 2005/0024421 A1 , the DE 10 2010 037 829 A1 , the JP 2004 268 511 A , the U.S. 2006/0119646 A1 , the U.S. 5,206,666 A , the U.S. 5,757,399 A and the U.S. 7,455,401 B2 a printing press with print heads that can be moved along a positioning path and a maintenance device is known in each case. through the U.S. 2011/0149004 A1 a printing machine with print heads that can be moved along a positioning path is known. the U.S. 8,262,198 B2 shows a printing machine with adjustable print heads. the DE 23 49 453 A1 shows movable nozzles of a liquid jet writer.

through the U.S. 2009/0284566 A1 a printing machine is known in which print heads can be moved in different linear directions for reasons of positional accuracy by means of four positioning devices and can be fed to a stationary maintenance device by movement parallel to an axis of rotation of a printing material guide element.

through the DE 10 2005 060 786 A1 , the EP 2 127 885 A1 and the U.S. 2008/0273063 A1 a printing press is known in each case, which has at least one supply system for coating medium and at least two inkjet print heads, both of which are connected via a liquid line to a standard supply, the standard supply being connected to a buffer store via a supply line and a discharge line.

through the U.S. 2009/0122107 A1 a printing press is known which has an arcuate arrangement of rows of print heads which can be set down from a printing material in a vertical direction along a common travel path. The printing material also runs in an arc, guided by guide elements that define an axial direction. Individual rows of print heads are assigned respective cleaning devices, which can be moved along their supply paths parallel to the axial direction and can be placed against the print heads in a direction opposite to their respective exit direction.

through the JP 2008 055 756 A discloses a printing machine with a central cylinder and print heads that can be switched off in four radial directions, the cleaning devices of which are arranged as an entire unit so that they can be pivoted about an axis of rotation of a central cylinder.

through the U.S. 6,764,160 B1 discloses a printing press with a central cylinder and print heads that can be switched off in four radial directions, the cleaning devices of which can only be moved tangentially. A supply route is an extension of a route that also has to be covered for cleaning purposes.

Through the post-released DE 10 2013 208 755 A1 a printing machine is known which has print heads which can be pivoted by means of positioning devices and to which maintenance devices can be assigned which can be arranged in different positions along a guide system.

The object of the invention is to create a printing machine.

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

A printing machine preferably has at least one printing unit, wherein the at least one printing unit preferably has at least one print head designed in particular as an inkjet print head and preferably at least one printing material guide element that can be rotated about an axis of rotation, and the at least one print head can preferably be arranged in at least one rest position, preferably designed as a maintenance position, in which preferably at least one maintenance device is and/or can be assigned to at least one nozzle of the at least one print head. The at least one print head can preferably be arranged in at least one printing position. An ejection direction of at least one nozzle of the at least one print head is preferably aligned at least in a printing position on a lateral surface of the at least one printing material guide element. The at least one maintenance device is preferably designed as at least one protective cover and/or as at least one cleaning device.

The at least one printing unit preferably has the at least one printing material guide element, which can be rotated about an axis of rotation defining an axial direction. The at least one printing unit preferably has at least four print heads designed in particular as inkjet print heads. At least four positioning devices are preferably arranged in the at least one printing unit, by means of which at least one print head can be arranged either in a respective printing position assigned to it or in a respective rest position assigned to it, in particular a maintenance position and/or assembly position. In particular, at least one first print head of the at least four print heads can be positioned at least either in a first printing position assigned to it or in a first rest position assigned to it, in particular by means of at least one first positioning device, in particular a first maintenance position and/or a first assembly position. In particular, at least one second print head of the at least four print heads can be positioned at least either in a second printing position assigned to it or in a second rest position assigned to it, in particular the second maintenance position and/or second assembly position, in particular by means of at least one second positioning device. The respective idle position is preferably designed as a respective maintenance position in which more preferably at least one maintenance device designed as a cleaning device is and/or can be assigned to at least one nozzle of the respective print head. One advantage is that this results in the possibility of creating a particularly compact printing unit because the maintenance device and the print heads only have to be moved by short distances relative to one another.

In particular, the first rest position is preferably configured as a first maintenance position, in which at least one first maintenance device configured as a first cleaning device is and/or can be assigned to at least one nozzle of the first print head. In particular, the second rest position is preferably configured as a second maintenance position, in which at least one second maintenance device configured as a second cleaning device is and/or can be assigned to at least one nozzle of the second print head. In particular, at least a third rest position of a third print head is preferably configured as a third maintenance position, in which at least one third maintenance device configured as a third cleaning device is and/or can be assigned to at least one nozzle of the third print head. In particular, at least a fourth rest position of a fourth print head is preferably configured as a fourth maintenance position, in which at least one fourth maintenance device configured as a fourth cleaning device is and/or can be assigned to at least one nozzle of the fourth print head.

The at least one maintenance device is preferably arranged such that it can be moved at least partially orthogonally to the axial direction along a supply path. In particular, the at least one first maintenance device is preferably at least along a first supply route movably arranged orthogonally to the axial direction. In particular, the at least one second maintenance device is preferably arranged such that it can be moved at least orthogonally to the axial direction along a second supply path.

A minimum distance, preferably referred to as the rest distance, in particular maintenance distance and/or assembly distance, between at least one first nozzle of the at least one first print head in its first rest position and at least one second nozzle of the at least one second print head in its second rest position is preferably at least 2 cm further preferably at least 5 cm, even more preferably at least 10 cm and even more preferably at least 20 cm greater than a minimum distance, preferably referred to as the working distance, between at least the at least one first nozzle of the at least one first print head in its first printing position and the at least one second nozzle of the at least one second print head in its second printing position. This results in the particular advantage that the at least four print heads are more easily accessible when they are to be serviced and/or repaired and are nevertheless arranged as close together as possible during printing operation, so that a high print quality can be achieved because there are fewer negative influences between the applications of printing ink of different colors are possible.

In the foregoing and in the following, printing ink is generally to be understood as meaning a coating agent, in particular also a lacquer. In particular, no distinction should be made between printing ink and an ink, but ink and coating agent should also be understood to mean ink in particular.

For example, print heads are designed in such a way that each individual print head does not extend over an entire working width of the printing press that is defined by a maximum printing material width that can be processed with the printing press. Then preferably several print heads are assigned to the same printing color and/or at least one nozzle bar is preferably arranged, which more preferably contains several print heads that can be moved together by means of the same positioning device. In particular, at least four positioning devices are then preferably arranged in the printing unit, by means of which at least one nozzle bar and/or several print heads assigned to the same printing color are designed to be movable together and in particular optionally at least either in a respective printing position assigned to it or in a , them assigned respective rest position can be arranged or are. The positioning devices are preferably positioning devices of the printing unit and in particular components of the printing unit. In particular, the at least one print head is preferably arranged such that it can be moved away from a transport path provided for at least one printing material web by means of at least one positioning device. The at least one printing unit preferably has at least two, in particular at least four, nozzle bars, each of which has at least two, in particular at least four print heads, and the at least two, in particular at least four, nozzle bars are arranged such that they can be moved by means of a respective positioning device along a respective linear adjustment path. The printing press is preferably characterized in that each nozzle bar can be moved individually and independently of other nozzle bars along its travel and/or in its printing position and/or its rest position by means of the positioning device assigned to it.

The at least one printing unit preferably has at least one positioning device for each double row of print heads arranged in the printing unit and/or at least one positioning device for each nozzle bar arranged in the printing unit and/or at least one positioning device for each coating medium arranged in the printing unit.

The printing press is preferably characterized in that the at least one maintenance device is arranged such that it can be moved by means of at least one feed device along at least one supply path between at least one parked position and at least one use position. The at least one maintenance device is preferably arranged such that it can be moved at least orthogonally to the axial direction A. The printing press is preferably characterized in that the respective maintenance device in its respective use position is associated with the respective at least one nozzle of the respective print head in its maintenance position. For each print head arranged in its printing position, at least one nozzle of this respective print head is preferably arranged below the supply path of the respective at least one maintenance device and for each print head arranged in its rest position this respective at least one nozzle is arranged above this respective supply path.

The respective provision path of the four maintenance devices in particular preferably runs linearly and in a respective or common direction, which is at most 45°, preferably at most 30°, more preferably at most 20° and even more preferably from a horizontal direction deviates by at most 10°. The respective or common supply direction is preferably horizontal.

The printing press is preferably characterized in that a position of at least one reference nozzle of a respective print head in its printing position and a position of this at least one reference nozzle of the respective print head in its maintenance position are at most 50 % of a width, measured in the axial direction, of a working area of a nozzle bar having the respective print head and/or at most 50% of a working width of the printing press determined by a maximum printing material width that can be processed with the printing press. As a result, a particularly space-saving printing machine can be implemented which is nevertheless easy to maintain and whose print heads are preferably easy to assemble and disassemble. In particular, the printing press is preferably characterized in that a position of the at least one first nozzle in the at least one printing position and a position of this at least one first nozzle in the at least one maintenance position are related to an axial direction defined by the axis of rotation of the at least one printing material guide element no more than 50% of the width, measured in the axial direction, of the working area of the nozzle bar having the at least one print head and/or no more than 50% of the working width of the printing press defined by the maximum printing material width that can be processed with the printing press.

In the at least one maintenance position of the respective print head, at least one maintenance device is preferably assigned and/or can be assigned to at least one nozzle of the at least one print head, and the at least one maintenance device is more preferably at least partially related to a respective ejection direction of the at least one nozzle arranged and/or arrangeable opposite one another.

The printing press is preferably characterized in that at least a first of at least two print heads, in particular of a first printing unit, can be arranged, preferably by means of a first positioning device assigned to it, at least either in the first printing position assigned to it or in a first rest position assigned to it, in particular the maintenance position and /or assembly position can be arranged, wherein in the at least one first rest position a rest position of at least one first nozzle of the at least one first of the at least two print heads has a first rest distance, in particular a maintenance distance and/or assembly distance from a first working position of the same at least one first nozzle of the at least one first which has at least two print heads in its first printing position. Preferably, at least a second of the at least two print heads, in particular this first printing unit, can be arranged, preferably by means of a second positioning device assigned to it, at least either in a second printing position assigned to it or in a second rest position assigned to it, in particular a maintenance position and/or assembly position, wherein in the at least one second rest position a rest position of at least one second nozzle of the at least one second of the at least two print heads a second rest distance, in particular maintenance distance and/or installation distance from a second working position of the at least one second nozzle of the at least one second of the at least two print heads in its second printing position having.

The first resting distance, in particular maintenance distance and/or assembly distance, preferably differs from the second resting distance, in particular maintenance distance and/or assembly distance, by at least 2 cm, more preferably at least 5 cm, even more preferably at least 10 cm and even more preferably at least 20 cm. In particular, a rest distance is a distance between a position of a nozzle when the print head having this nozzle is arranged in its rest position and a position of the same nozzle when the same print head is arranged in its printing position. This results in the particular advantage that, for example, a linear and therefore simple and cost-effective feed device can be arranged, by means of which a maintenance device can be used on different print heads. Another advantage is that there is enough space for all maintenance positions in their respective use positions. Preferably, at least two of the at least four print heads preferably arranged on different positioning devices have the same rest distances in pairs. This results, for example, from a symmetry of an arrangement of the positioning devices, with a plane of symmetry, for example, completely containing the axis of rotation of the at least one printing material guide element.

The printing press is preferably characterized in that when the third print head is in its rest position, a rest position of at least one third nozzle of the at least one third print head is a third rest distance from a working position of the same at least a third nozzle of the same has at least one third print head in its third printing position and that when the fourth print head is in its rest position, a rest position of the at least one fourth nozzle of the at least one fourth print head is a fourth rest distance from a working position of the same at least one fourth nozzle of the same at least one fourth print head in its fourth printing position and that the third resting distance is equal to the second resting distance and/or that the fourth resting distance is equal to the first resting distance.

The printing press is preferably characterized in that when the in particular first print head is arranged in the in particular first maintenance position, at least one in particular first maintenance device is located between the at least one in particular first nozzle of the at least one in particular first print head and an area of the area closest to this at least one in particular first nozzle for the printing material can be arranged and/or arranged in the transport path provided and/or that, when the in particular first print head is arranged in the at least one in particular first maintenance position, at least one in particular first maintenance device between the at least one in particular first nozzle of the at least one in particular first print head and one of these at least one in particular first print head Nozzle next area of a transfer body can be arranged and / or arranged.

The printing press, which preferably has at least one printing unit, which preferably has at least two and more preferably at least four print heads and at least one printing material guide element that can be rotated about an axis of rotation that defines an axial direction, is preferably characterized in that each of the at least two print heads can be rotated by a respective , At least this print head associated positioning device is arranged to be movable along a respective linear adjustment path, the linear adjustment paths pointing in respective adjustment directions which differ in pairs by at least 10° and at most 150°. Furthermore, each of the at least two print heads can preferably be arranged by means of the respective positioning device at least either in a printing position assigned to it or at least in a maintenance position assigned to it. Preferably, in the at least one maintenance position of a first print head of the at least two print heads, at least one maintenance device is and/or can be assigned to at least one first nozzle of this at least one first print head. Furthermore, the at least one maintenance device is preferably arranged such that it can be moved at least partially orthogonally to the axial direction by means of at least one feed device along at least one supply path between at least one parked position and at least one use position. This results in the particular advantage that the printing unit can be made very compact. By arranging the linear adjustment paths at appropriate angles, for example around a central cylinder, less installation space is required than if all print heads were arranged to be movable in the axial direction or in opposite directions. The at least partially orthogonal mobility of the maintenance device also promotes a compact design of the printing unit, in particular because the maintenance device can be as wide as the working area of the nozzle bar and the printing unit does not have to be twice as wide. In contrast to print heads that can be moved parallel to one another, there is an enlarged spatial area for maintenance devices in their operating positions, while at the same time the print heads are arranged very close to one another for printing.

The printing press preferably has at least one printing unit, which preferably has at least one print head designed as an inkjet print head. The at least one printing unit preferably has at least one printing material guide element that can be rotated about a respective axis of rotation. The at least one print head is preferably designed to be movable along an adjustment path in at least one adjustment direction, with the adjustment direction preferably having at least one component that is oriented orthogonally to the axial direction defined by the axis of rotation of the at least one printing material guide element. The printing press is preferably characterized in that at least one and preferably precisely one, preferably endless webbing-up means for webbing-up a printing substrate web that is movable along at least one webbing-up path is and/or can be arranged at least at times within a printing unit and that at least parts of the at least one webbing-up path are on the have a distance of at least 2 cm in relation to each target area of each nozzle of each print head of this printing unit in the axial direction. Preferably, at least parts of the at least one webbing-up path and preferably the complete webbing-up path have a distance of at least 2 cm, more preferably at least 4 cm, even more preferably at least 6 cm and even further, in relation to the axial direction from each target area of each nozzle of each print head of this printing unit preferably at least 8 cm. Preferably, at least parts of the webbing-up means and more preferably the complete webbing-up means are at a distance of at least 2 cm, more preferably at least 4 cm, even more preferably at least 6 cm and even more preferably at least 8 cm. In particular, this results in the advantage that a printing material web can be drawn into the printing press particularly easily, quickly and precisely, and yet there is no risk of damage and/or contamination of the nozzles of print heads occurring in the process.

The printing press is preferably characterized in that at least one printing material web is and/or can be connected to the at least one webbing-up means via at least one connecting element, with the at least one connecting element more preferably being designed as at least one webbing-up point. The printing press is preferably characterized in that the at least one webbing-up means is designed as at least one endless webbing-up belt and/or that at least one webbing-up guide element is arranged, by means of which the at least one webbing-up path of the at least one webbing-up means can be and/or is fixed, with further preference the at least one webbing-up guide element is designed as at least one deflection roller or as at least one chain rail and/or the at least one webbing-up guide element is designed as at least one rotatable webbing-up guide element.

The at least one webbing-up means for webbing-up a printing material web along the intended transport path of the printing material web is preferably arranged permanently along its at least one webbing-up path within the printing press. The at least one webbing-up means preferably has at least two and more preferably at least five connection points provided, at which at least one printing material web can be connected to the at least one webbing-up means directly and/or via at least one connecting element. The printing machine is preferably characterized in that the at least two connection points are and/or are at most 10 cm apart, more preferably at most 5 cm, even more preferably at most 2 cm and even more preferably no distance at all, in relation to the axial direction at least two connection points spaced apart from one another along the at least one webbing-up path. Preferably, a webbing-up path of the at least one webbing-up means encloses the at least one rotatable printing-material guide element in an angular range of at least 180°, viewed from a rotational axis of the at least one printing-material-guiding element, and at least one rotatable webbing-up guide element is arranged, by means of which at least one webbing-up path of the at least one webbing-up means can be fixed and/or is fixed and which is arranged to be rotatable about the same axis of rotation as at least one printing material guide element of a printing unit of the printing press. More preferably, the webbing-up path of the at least one webbing-up means has a radius of curvature, at least along this angular range, which deviates by at most 5 cm from a radius of curvature of this at least one printing material guide element.

The printing press is preferably characterized in that an axial plane of projection is defined by a surface normal that lies parallel to the axial direction or deviates from this axial direction by at most 2° and that a projection of the transport path provided for the printing material lies in the axial plane of projection in the axial direction and a projection of the webbing-up path provided for the at least one webbing-up means overlap in the axial direction at least over 25% of a length of the projection of the webbing-up path provided for the webbing-up means and/or that only at least one webbing-up means is arranged which is arranged on only one side of the intended transport path for printing material in relation to the axial direction and/or whose threading path runs only on one side of the intended transport path for printing material.

In particular, the printing press can preferably be used to implement a method for threading at least one printing material web into at least one printing unit of a printing press, with the axial direction extending parallel to the axis of rotation of the at least one printing material guide element of the at least one printing unit, and with at least one print head designed as an inkjet print head being used in a shutdown process the at least one printing unit is set aside in at least one positioning direction from a transport path provided for the at least one printing material web and wherein in a webbing-up process at least one webbing-up means is then moved along a webbing-up path through the at least one printing unit and the at least one printing material web along the path for the at least one printing material web provided transport path pulls and seen in an axial direction, the threading path and the transport path are spaced from each other. This at least one adjustment direction is preferably at least partially oriented orthogonally to the axial direction.

The method is preferably characterized in that the at least one webbing-up means is connected to the at least one printing material web in a connecting process by means of at least one connecting element. The at least one connecting element preferably passes through a printing position of the at least one print head while it is set aside from the intended transport path and/or is arranged in at least one idle position and/or happens at at least one connecting element during the threading process at least one target area of at least one nozzle of the at least one print head and/or no part of the at least one threading means passes a target area of a nozzle of the at least one print head during the threading process. The method is preferably characterized in that, in a positioning process, the at least one print head is then positioned against the at least one positioning direction and/or along a positioning path on the intended transport path of the at least one printing material web and/or is positioned in its printing position.

The method is preferably characterized in that in the switching-off process at least two print heads of the at least one printing unit are switched off in a respective positioning direction from an intended transport path of the at least one printing material web, with the respective positioning directions differing in pairs by at least 10° and at most 150°.

The method is preferably characterized in that in at least one operating state the at least one webbing-up means is connected to the printing material by means of the at least one connecting element and the at least one print head is set off from the intended transport path and/or is arranged in at least one idle position and at least one nozzle with its ejection direction is aligned with the at least one connecting element and/or that in the at least one operating state the at least one connecting element is in contact with the at least one printing material guide element or with at least one transfer element and/or that the at least one webbing-up means is in this operating state in relation to the axial direction has a distance of at least 2 cm to each target area of each nozzle of each print head of this printing unit.

At least one webbing-up means is preferably used, which is arranged on only one side of the intended transport path for printing material in relation to the axial direction and/or whose webbing-up path runs only on one side of the intended transport path for printing material.

The at least one first printing unit preferably has the at least two print heads which are preferably arranged on at least one first movable nozzle bar and are in particular embodied as inkjet print heads. The printing press is preferably characterized in that the printing press has at least one supply system for coating medium and that the at least one supply system has at least one normal supply and that the at least two print heads are connected and/or can be connected to the at least one normal supply via at least one first liquid line are. For example, each of the at least two print heads is connected and/or can be connected to the at least one normal reservoir via at least one first liquid line. The at least one supply system preferably has at least one return storage device and at least one intermediate storage device. The at least one normal reservoir preferably has at least one overflow outlet, which is more preferably connected and/or can be connected to the at least one intermediate storage tank via the at least one return tank and at least one discharge line and/or which is preferably designed as at least one passive overflow outlet. The at least one normal supply and the at least one return accumulator are preferably arranged to be movable together with the at least one nozzle bar. The at least one nozzle bar can preferably be arranged by means of at least one of the positioning devices, in particular at least one of the positioning devices of the at least one printing unit, at least either in a printing position assigned to it or at least in a maintenance position assigned to it.

A section of the at least one discharge line is preferably arranged between the at least one overflow drain and the at least one return reservoir, within which at least one valve, in particular at least a second valve, is arranged. At least a first one is preferably arranged within at least one supply line, wherein the at least one buffer store is preferably connected and/or connectable to the at least one normal supply via at least one supply line. At least one first liquid pump is preferably arranged in the at least one supply line.

One particular advantage is that the at least one valve located within the derivation between the at least one overflow drain and the at least one return accumulator allows the at least one normal supply and the at least one return accumulator to be separated. As a result, for example, a pressure can be increased within the normal reservoir in order to carry out a nozzle cleaning of the print heads and, at the same time and independently of this, coating medium can be removed from the at least one return reservoir.

In particular, the joint mobility of the at least one return reservoir with the at least two print heads ensures that coating medium does not flow out of the overflow outlet even during maintenance position arranged positioning device is always possible to constant conditions and thus optimized, for example caused solely by gravity. In particular, this advantage results if the at least one return reservoir is arranged along the at least one discharge line after the at least one overflow drain and before any pump. At least one return pump is preferably arranged along the at least one discharge line after the at least one return accumulator. Coating agent can then be pumped out of the at least one return reservoir, independently of the position of the positioning device and independently of any other pressure that may have been set within the at least one standard reservoir.

In particular, the advantages mentioned arise when, as is preferred, an adjustment direction of an adjustment path of the at least one nozzle bar, which can be effected in particular by means of the at least one positioning device, has at least one component in the vertical direction, which is more preferably at least 10 cm, even more preferably at least 20 cm and even more preferably is at least 30 cm, because without the appropriate measures, hydrostatic pressure changes due to the height differences could lead to different conditions. More preferably, the at least one nozzle bar is arranged to be movable relative to a frame of the printing unit by means of the at least one positioning device, and the at least one intermediate store is arranged stationary relative to the frame of the printing unit. A relatively large buffer store can thus be arranged which does not have to be moved by means of the positioning device.

In addition, the at least one normal supply is preferably at least indirectly connected to at least one buffer store via at least one supply line and at least one discharge line, and the at least one normal supply and/or the at least one discharge line has at least one overflow outlet, the outflow side of which is connected at least indirectly to the at least one Cache is connected and / or arranged connectable. Preferably, at least one volume provided as a first gas chamber is arranged in the at least one normal reservoir, which volume is and/or can be connected to at least one first gas pump via at least one first gas line. Then there is the advantage, in particular, that particularly constant printing conditions prevail at the print heads, thereby improving print quality and facilitating handling, for example by fewer manual adjustments and/or fewer cleaning measures having to be carried out. In the at least one return reservoir, at least one volume is preferably arranged, in particular as a third gas space, which volume is and/or can be connected to at least one first gas pump via at least one first equalizing line. For example, a gas volume is arranged in the at least one normal reservoir, in which there is a normal pressure that is lower than an ambient pressure that prevails on an ejection side of at least one nozzle of the at least one print head. More preferably, the at least one first gas line and the at least one equalizing line are and/or can be connected to one another in a separable manner via at least one pressure regulator. In this way, the same pressure can be ensured in all relevant gas chambers, but also, for example, when the first and second valves are closed, a pressure and the at least one normal supply can be increased, while pressure equalization in the third gas chamber, for example during a pumping process, is made possible.

At least two standard supplies are preferably arranged to be movable together with the same at least one nozzle bar and each of these at least two standard supplies is connected and/or can be connected to at least one of the at least two print heads via at least one first liquid line. In this way, an even hydrostatic pressure can be achieved in all print heads, even if they are arranged at different heights. For this purpose, the at least two print heads are more preferably arranged at different heights relative to one another on the at least one nozzle bar and the vertical distances of each of the at least two print heads from the respective standard supply connected to it via a first liquid line are wider, up to a maximum tolerance value of 1 cm preferably equal to at most 0.5 cm.

The printing press is preferably characterized in that the printing press has at least one first printing unit and at least one supply system for coating medium and that the at least one supply system has at least one normal supply and that each of the at least two print heads is connected to the at least one normal supply via at least one first liquid line connected and/or arranged so that it can be connected, and that the at least one normal supply is connected to at least one buffer store via at least one supply line and at least one discharge line, and that the at least one normal supply and/or the at least one discharge line has at least one overflow outlet, the outflow side of which is connected to the at least is connected and/or arranged to be connectable to a buffer store. This results in the particular advantage that constant operating conditions for the print heads can be ensured, in particular that a constant pressure prevails within the coating medium at the nozzle openings of the print heads.

For example, the printing press is characterized in that an ejection direction of at least one first nozzle of the at least one first print head in the first printing position differs by one from an ejection direction of this at least one first nozzle of the at least one print head in the first rest position, in particular maintenance position and/or assembly position Angles of at least 5°, more preferably at least 10°, even more preferably at least 15° and even more preferably at least 20°. For example, this applies analogously to all at least four print heads.

However, an ejection direction of each nozzle of the at least two, in particular at least four print heads is preferably the same in the respective printing position and in the respective rest position, in particular maintenance position, installation position.

A position of the at least one nozzle when the print head is arranged in the at least one printing position and a position of the at least one nozzle when the print head is arranged in the at least one idle position, in particular the maintenance position and/or installation position, differ on the axial axis defined by the axis of rotation of the at least one printing material guide element Direction-related by at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of the width, measured in the axial direction, of the working area of the nozzle bar having the at least one print head and/or at most 50% preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of the working width of the printing press defined by the maximum printing material width that can be processed with the printing press. This results in the particular advantage that constant conditions during maintenance processes and/or in particular the same maintenance device are made possible for all print heads and a geometry in printing operation can nevertheless be optimized for precisely this printing operation. A plane in which this angle is measured is preferably defined by a surface normal that is parallel to the axial direction A or deviates from this axial direction A by at most 2°; this plane is more preferably the axial projection plane.

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

• 1a eine schematische Darstellung einer Rollen-Druckmaschine;
• 1b eine schematische Darstellung einer Rollen-Druckmaschine mit alternativer Bahnführung;
• 2 eine schematische Darstellung eines Teils einer Druckeinheit mit einer Doppelreihe von Druckköpfen;
• 3 eine schematische Darstellung einer Druckeinheit mit mehreren Düsenbalken, deren Druckköpfe in Druckpositionen angeordnet sind;
• 4 eine schematische Darstellung einer Druckeinheit mit mehreren Düsenbalken, deren Druckköpfe in Ruhepositionen, insbesondere Wartungspositionen angeordnet sind, wobei Positionierantriebe der Übersichtlichkeit halber unterbrochen dargestellt sind;
• 5 eine schematische Darstellung einer Druckeinheit mit mehreren Düsenbalken, deren Druckköpfe in Ruhepositionen, insbesondere Montagepositionen angeordnet sind, wobei Positionierantriebe der Übersichtlichkeit halber unterbrochen dargestellt sind;
• 6 eine schematische Darstellung einer Druckeinheit mit mehreren Düsenbalken, deren Druckköpfe teilweise in Ruhepositionen, insbesondere Wartungspositionen und teilweise in Druckpositionen angeordnet sind, wobei Positionierantriebe der Übersichtlichkeit halber unterbrochen dargestellt sind;
• 7a eine schematische Darstellung einer Druckeinheit mit mehreren Düsenbalken, deren Druckköpfe teilweise in Wartungspositionen und teilweise in Montagepositionen angeordnet sind, wobei Positionierantriebe der Übersichtlichkeit halber unterbrochen dargestellt sind;
• 7b eine schematische Darstellung einer Druckeinheit mit mehreren Düsenbalken, wobei Positionierantriebe der Übersichtlichkeit halber unterbrochen dargestellt sind;
• 7c eine schematische Darstellung einer Druckeinheit mit mehreren Düsenbalken, wobei Positionierantriebe der Übersichtlichkeit halber unterbrochen dargestellt sind;
• 8a eine schematische Darstellung eines Versorgungssystems für Beschichtungsmittel;
• 8b eine schematische Darstellung eines alternativen Versorgungssystems für Beschichtungsmittel;
• 9a eine schematische Darstellung einer Druckeinheit mit vier Positioniervorrichtungen und vier Wartungsvorrichtungen, wobei mittels der beiden rechten Positioniervorrichtungen Druckköpfe in Druckpositionen angeordnet sind und mittels der beiden linken Positioniervorrichtungen Druckköpfe in beispielsweise als Montagepositionen ausgebildeten Ruhepositionen angeordnet sind und sich die Wartungsvorrichtungen in Parkpositionen befinden und wobei Normalvorräte und Rücklaufspeicher nur teilweise und exemplarisch dargestellt sind;
• 9b eine schematische Darstellung einer Druckeinheit gemäß 9a, wobei mittels der beiden rechten Positioniervorrichtungen Druckköpfe in Druckpositionen angeordnet sind und mittels der beiden linken Positioniervorrichtungen Druckköpfe in Wartungspositionen angeordnet sind und sich die beiden linken Wartungsvorrichtungen in Einsatzpositionen befinden.

Show it:

• 1a a schematic representation of a web printing machine;
• 1b a schematic representation of a web printing machine with an alternative web guide;
• 2 a schematic representation of part of a printing unit with a double row of print heads;
• 3 a schematic representation of a printing unit with a plurality of nozzle bars, the print heads of which are arranged in printing positions;
• 4 a schematic representation of a printing unit with a plurality of nozzle bars, the print heads of which are arranged in rest positions, in particular maintenance positions, with positioning drives being shown interrupted for the sake of clarity;
• 5 a schematic representation of a printing unit with a plurality of nozzle bars, the print heads of which are arranged in rest positions, in particular assembly positions, with positioning drives being shown interrupted for the sake of clarity;
• 6 a schematic representation of a printing unit with a plurality of nozzle bars, the print heads of which are arranged partly in rest positions, in particular maintenance positions, and partly in printing positions, with positioning drives being shown interrupted for the sake of clarity;
• 7a a schematic representation of a printing unit with a plurality of nozzle bars, the print heads of which are arranged partly in maintenance positions and partly in assembly positions, with positioning drives being shown interrupted for the sake of clarity;
• 7b a schematic representation of a printing unit with several nozzle bars, wherein positioning drives are shown interrupted for the sake of clarity;
• 7c a schematic representation of a printing unit with several nozzle bars, wherein positioning drives are shown interrupted for the sake of clarity;
• 8a a schematic representation of a supply system for coating agents;
• 8b a schematic representation of an alternative supply system for coating agents;
• 9a a schematic representation of a printing unit with four positioning devices and four maintenance devices, wherein the two right-hand positioning devices are used to arrange print heads in printing positions and by means of the two left-hand positioning devices, print heads are arranged in rest positions designed, for example, as assembly positions, and the maintenance devices are in parking positions, and with normal supplies and return storage being shown only partially and by way of example;
• 9b a schematic representation of a printing unit according to FIG 9a , wherein the two right positioning devices are used to arrange print heads in printing positions and the two left positioning devices are used to arrange print heads in maintenance positions and the two left maintenance devices are in use positions.

A printing press 01 has at least one printing substrate source 100, at least one first printing unit 200, preferably at least one first dryer 301, preferably at least one second printing unit 400 and preferably at least one second dryer 331 and preferably at least one post-processing device 500. Printing machine 01 is also preferably embodied as an inkjet printing machine 01. Printing press 01 is preferably embodied as a web-fed printing press 01, more preferably as a web-fed inkjet printing press 01. Printing press 01 is embodied, for example, as a rotary printing press 01, for example as a web-fed rotary printing press 01, in particular web-fed rotary inkjet printing press 01. In the case of a web-fed printing press 01 the printing material source 100 is embodied as a roll unwinding device 100. In the case of a sheet-fed printing press or sheet-fed rotary printing press, the printing material source 100 is designed as a sheet feeder. At least one printing substrate 02 is preferably aligned in the printing substrate source 100, preferably with respect to at least one edge of this printing substrate 02. In the roll unwinding device 100 of a web-fed printing press 01, at least one web-shaped printing substrate 02, i.e. a printing substrate web 02, for example a paper web 02 or a textile web 02 or a foil 02, for example a plastic foil 02 or a metal foil 02, unwound from a roll of printing material 101 and preferably aligned in an axial direction A with respect to its edges. The axial direction A is preferably a direction A that extends parallel to an axis of rotation 111 of a printing material roll 101 and/or at least one printing material guide element 201; 401, for example at least one central cylinder 201; 401 extends. A transport path for the at least one printing substrate 02 and in particular the printing substrate web 02 runs downstream of the at least one printing substrate source 100, preferably through the at least one first printing unit 200, where the printing substrate 02 and in particular the printing substrate web 02 is printed on at least one side and preferably in connection with at least one printing ink is provided with a printed image, preferably on both sides, using the at least one second printing unit 400.

After passing through the at least one first printing unit 200, the transport path of the printing substrate 02 and in particular the printing substrate web 02 preferably runs through the at least one first dryer 301 in order to dry the applied printing ink. In the foregoing and in the following, printing ink is generally to be understood as meaning a coating agent, in particular also a lacquer. In particular, no distinction should be made between printing ink and an ink, but ink and coating agent should also be understood to mean ink in particular. The at least one first dryer 301 is preferably part of a dryer unit 300. After passing through the at least one first dryer 301 and preferably the at least one second printing unit 400 and/or the at least one second dryer 331, the printing substrate 02 and in particular the printing substrate web 02 is preferably the fed to at least one post-processing device 500 and further processed there. The at least one post-processing device 500 is embodied, for example, as at least one folding device 500 and/or as a winding device 500 and/or as at least one sheet delivery device 500. In the at least one folding device 500, the printing substrate 02, which is preferably printed on both sides, is preferably further processed into individual printed products.

Preferably at least the first dryer 301 and/or after the at least one first dryer 301 and/or preferably at least the second printing unit 400 and/or after the at least one first printing unit 200 is preferred along the transport path of the printing substrate 02 and in particular the printing substrate web 02 through the printing press 01 the at least one second printing unit 400, the at least one second dryer 331 is preferably arranged, and/or the at least one post-processing device 500 is preferably arranged downstream of the at least one second dryer 331. This ensures that printing on both sides of the printing material 02, and in particular the printing material web 02, is possible with high quality.

A web-fed printing press 01 is described in more detail below. Corresponding details can, however, also be transferred to other printing presses 01, for example sheet-fed printing presses, provided they do not conflict with this. Printing substrate rolls 101, which are preferably used in the roll unwinding device 100, each preferably have a core on which the web-type printing substrate 02 is placed for use in the web-fed printing press 01 is wound up. Printing substrate web 02 preferably has a width of 700 mm to 2000 mm, but can also have any smaller or preferably larger width. At least one printing material roll 101 is rotatably arranged in the roll unwinding device 100 . In a preferred embodiment, the roll unwinding device 100 is designed to accommodate a roll of printing material 101, ie it has only one storage position for a roll of printing material 101. In another embodiment, the roll unwinding device 100 is embodied as a roll changer 100 and has storage positions for at least two printing material rolls 101. The roll changer 100 is preferably designed in such a way that it enables a flying roll change, i.e. connecting a first printing substrate web 02 of a currently processed printing substrate roll 101 with a second printing substrate web 02 of a printing substrate roll 101 to be processed subsequently, while both the currently processed printing substrate roll 101 and the subsequently to be processed printing material roll 101 rotate.

A working width of printing machine 01 is a dimension that preferably extends orthogonally to the intended transport path for printing substrate 02 through the at least one first printing unit 200, more preferably in the axial direction A. The working width of printing machine 01 preferably corresponds to a maximum width that a printing material may have in order to still be able to be processed with printing press 01, i.e. a maximum printing material width that can be processed with printing press 01.

The roll unwinding device 100 preferably has at least one roll holding device 103 for each storage position, which is embodied, for example, as a tensioning device 103 and/or as a clamping device 103. The at least one roll holding device 103 preferably represents at least one first motor-driven rotary body 103. The at least one roll holding device 103 serves to rotatably attach at least one printing substrate roll 101. The at least one roll holding device 103 preferably has at least one drive motor 104.

The roll unwinding device 100 preferably has a dancer roller 113, preferably arranged such that it can be deflected on a dancer lever 121, and/or a first web edge aligner 114 and/or along the transport path of the printing substrate web 02 downstream of the roller holding device 103 an infeed unit 139 configured as a first measuring roller 141, in particular an infeed measuring roller 141, having a first measuring device 141. This pull roller 118 preferably has its own drive motor 146, designed as a pull drive motor 146, which is preferably connected to a machine controller. The pull roller 118 preferably represents at least one second motor-driven rotary body 118. A web tension can be set and maintained within limits by means of the dancer roller 113 and/or the web tension is preferably kept within limits. If necessary, the roll unwinding device 100 has a gluing and cutting device, by means of which a roll change can be carried out on the fly, i. H. can take place without the printing material web 02 coming to a standstill.

The infeed unit 139 is preferably arranged downstream of the first web edge aligner 114 . As part of the infeed unit 139, the at least one pull roller 118 is preferably arranged, with which the pull roller 117 is preferably arranged together to form the infeed gap 119. Infeed gap 119 is used to regulate web tension and/or to transport printing substrate 02. The web tension can preferably be measured using the at least one first measuring device 141 configured as a first measuring roller 141. The at least one first measuring device 141 embodied as a first measuring roller 141 is preferably arranged upstream of infeed nip 119 in the transport direction of printing substrate web 02.

A first printing unit 200 is arranged downstream of roll unwinding device 100 with respect to the transport path of printing substrate 02. The first printing unit 200 has at least one printing material guide element 201. The at least one printing material guide element 201 is preferably embodied as at least a first central printing cylinder 201, or central cylinder 201 for short. When a central cylinder 201 is mentioned below, a central printing cylinder 201 is always meant. The at least one first central cylinder 201 preferably represents at least one third motor-driven rotary body 201. During printing operation, the printing substrate web 02 at least partially wraps around the first central cylinder 201. An angle of wrap is preferably at least 180° and more preferably at least 270°. The angle of wrap is the angle, measured in the circumferential direction, of a cylinder jacket surface of the first central cylinder 201, along which the printing substrate 02 and in particular the printing substrate web 02 is in contact with the first central cylinder 201. Accordingly, preferably at least 50% and more preferably at least 75% of the lateral cylinder surface of the first central cylinder 201 is in contact with the printing substrate web 02 during printing operation, viewed in the circumferential direction. This means that a partial surface of a cylinder jacket surface of the at least a first central cylinder 201 has the angle of wrap around the at least one first central cylinder 201, which is preferably at least 180° and more preferably at least 270°.

At least one second measuring device 216, preferably embodied as a second measuring roller 216, for measuring the web tension is preferably arranged along the transport path of the printing substrate web 02 upstream of the first central cylinder 201 of the first printing unit 200. At least one first printing substrate preparation device 202 or web preparation device 202 is preferably arranged along the transport path of printing substrate web 02 upstream of first central cylinder 201 of first printing unit 200, acting on printing substrate web 02 and/or aligned with the intended transport path of printing substrate web 02. The first printing material preparation device 202 is assigned to at least one first side and preferably both sides of the printing material web 02 and, in particular, acts and/or is capable of acting at least on this first side of the printing material web 02 and preferably on both sides of the printing material web 02. The feed gap 119 formed by the draw roller 118 and the draw pressure roller 117 is preferably arranged along the transport path of the printing substrate web 02 between the first web edge aligner 114 and the at least one first central cylinder 201.

In a preferred embodiment, the at least one first printing material preparation device 202 is arranged along the transport path of printing material web 02 after infeed nip 119 and before the first central cylinder 201, acting on printing material web 02 and/or aligned with the transport path of printing material web 02. The at least one first printing material preparation device 202 is preferably embodied as at least one printing material cleaning device 202 or web cleaning device 202. Alternatively or additionally, the at least one printing material preparation device 202 is embodied as at least one coating device 202, in particular for water-based coating media. Such a coating is used, for example, as a primer. Alternatively or additionally, the at least one printing material preparation device 202 is embodied as at least one corona device 202 and/or discharge device 202 for the corona treatment of printing material 02.

A roller 203 embodied as a first deflection roller 203 of the first printing unit 200 is preferably arranged parallel to the first central cylinder 201 with respect to its axis of rotation. This first deflection roller 203 is preferably arranged at a distance from the first central cylinder 201 . In particular, there is preferably a first gap 204 between the first deflection roller 203 and the first central cylinder 201, which is greater than the thickness of the printing substrate web 02. The thickness of the printing substrate web 02 is understood to mean the smallest dimension of the printing substrate web 02. The printing substrate web 02 preferably wraps around part of the first deflection roller 203 and is deflected by it in such a way that the transport path of the printing substrate web 02 in the first intermediate space 204 runs both tangentially to the first deflection roller 203 and tangentially to the first central cylinder 201. A lateral surface of the deflection roller 203 preferably consists of a comparatively inelastic material, more preferably a metal, even more preferably steel or aluminum.

At least one first cylinder 206 embodied as a first impression roller 206 is preferably arranged in the first printing unit 200. The first impression roller 206 preferably has a lateral surface that consists of an elastic material, for example an elastomer. The first impression roller 206 can preferably be set against the first central cylinder 201 and/or set off from it by means of a setting drive. When it is engaged with the first central cylinder 201, the first impression roller 206 preferably forms a first impression roller 209 together with the first central cylinder 201. Printing material web 02 preferably runs through the first impression roller 209 during printing operation. Through the first deflection roller 203 and/or preferably through the first Imprinter 206 places the printing substrate web 02 preferably flat and more preferably in a clear and known position on the first central cylinder 201. Apart from at most the first impression roller 206 and/or other impression rollers, if applicable, no further rotary body, in particular no further roller and no further cylinder, is preferably in contact with the at least one first central cylinder 201.

The axis of rotation of the first impression roller 206 is preferably arranged below the axis of rotation 207 of the first central cylinder 201 .

The first central cylinder 201 preferably has its own first drive motor 208 assigned to the first central cylinder 201, which is preferably embodied as an electric motor 208 and which is more preferably embodied as a direct drive 208 and/or individual drive 208 of the first central cylinder 201. A direct drive 208 is to be understood as meaning a drive motor 208 which transmits and/or is capable of transmitting torque to the at least one first central cylinder 201 without the interposition of further rotary bodies that are in contact with the printing substrate 02 connection is established. An individual drive 208 is to be understood as meaning a drive motor 208 which is embodied as a drive motor 208 exclusively for the at least one first central cylinder 201. First drive motor 208 of first central cylinder 201 preferably has at least one permanent magnet, which more preferably is part of a rotor of first drive motor 208 of first central cylinder 201.

A first rotary angle sensor is preferably arranged on the first drive motor 208 of the first central cylinder 201 and/or on the first central cylinder 201 itself, which measures and/or is capable of measuring a rotary angle position of the first drive motor 208 and/or the first central cylinder 201 itself and transmits it to a higher-level machine controller is configured to transmit and/or capable of transmission. The first angle of rotation sensor is designed, for example, as a rotary encoder or absolute value encoder. With such a rotary angle sensor, a rotary position of the first drive motor 208 and/or preferably a rotary position of the first central cylinder 201 can be absolutely determined, preferably by means of the higher-level machine control. Additionally or alternatively, the first drive motor 208 of the first central cylinder 201 is connected to the machine controller in terms of circuitry in such a way that the machine controller, on the basis of target data specified by the machine controller to the first drive motor 208 of the first central cylinder 201, 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. In particular, an area of the machine control that specifies the angular position or rotational position of the first central cylinder 201 and/or the first drive motor 201 is preferably connected directly, in particular without an interposed sensor, to an area of the machine control that controls at least one print head 212 of the first printing unit 200.

At least one first printing unit 211 is arranged within the first printing unit 200 . The at least one first printing unit 211 is preferably arranged in the direction of rotation of the first central cylinder 201 and thus along the transport path of the printing substrate web 02 after the first impression roller 206, preferably acting and/or capable of acting and/or aligned and/or alignable on the at least one first central cylinder 201. The at least one first printing unit 211 is embodied as a first inkjet printing unit 211 and is also referred to as the first inkjet printing unit 211. The first printing unit 211 preferably has at least one nozzle bar 213 and preferably a plurality of, in particular four, nozzle bars 213. 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 print head 212, which is embodied as an inkjet print head 212. The at least one nozzle bar 213 preferably has at least one print head 212 in each case and preferably a plurality of print heads 212 in each case. Each print head 212 preferably has a plurality of nozzles from which drops of ink are and/or are ejectable. A nozzle bar 213 is a component that preferably extends over at least 80% and more preferably at least 100% of the working width of printing press 01 and serves as a carrier for the at least one print head 212. The axial length of the barrel of the at least one first central cylinder 201 is preferably at least as great as the working width of printing press 01. One or more nozzle bars 213 are arranged for each printing unit 211. Each nozzle is preferably assigned a clearly defined target area in relation to direction A of the width of printing substrate web 02 and preferably in relation to direction A, in particular of the axis of rotation 207 of the at least one first central cylinder 201. Each target area of a nozzle is preferably clearly defined, at least in the printing operation, in particular in relation to the circumferential direction of the at least one first central cylinder 201. In particular, a target area of a nozzle is that, in particular, substantially rectilinear spatial area that extends from this nozzle in an ejection direction of this nozzle.

The at least one first nozzle bar 213 preferably extends orthogonally to the transport path of printing substrate 02 across the working width of printing press 01. The at least one nozzle bar 213 preferably has at least one row of nozzles. Viewed in axial direction A, the at least one row of nozzles preferably has nozzle openings at regular intervals over the entire working width of printing press 01 and/or the width of the barrel of the at least one first central cylinder 201. In one embodiment, a single, continuous print head 212 is provided for this purpose, which extends in axial direction A over the entire working width of printing press 01 and/or the entire width of the barrel of the at least one first central cylinder 201. The at least one row of nozzles is preferably embodied as at least one linear row of individual nozzles extending across the entire width of printing substrate web 02 in axial direction A. In another preferred embodiment, a plurality of print heads 212 are arranged next to one another in the axial direction A on the at least one nozzle bar 213. Since such individual print heads 212 are usually not provided with nozzles up to an edge of their housing, at least two and more preferably exactly two are preferred Rows of print heads 212 that extend in axial direction A are offset from one another in the circumferential direction of the first central cylinder 201, preferably in such a way that print heads 212 that follow one another in axial direction A preferably alternately belong to one of the at least two rows of print heads 212, preferably always alternately to a first and a second of two rows of print heads 212. Two such rows of print heads 212 form a double row of print heads 212. The at least one row of nozzles is preferably not designed as a single linear row of nozzles, but results from the sum of several individual ones, further preferably two rows of nozzles arranged offset from one another in the circumferential direction.

If a print head 212 has a plurality of nozzles, all target areas of the nozzles of this print head 212 together form a working area of this print head 212. Working areas of print heads 212 of a nozzle bar 213 and in particular of a double row of print heads 212 adjoin one another and/or overlap when viewed in axial direction A seen in the axial direction A. In this way, even when print head 212 is not continuous in axial direction A, it is ensured that target areas of nozzles of the at least one nozzle bar 213 and/or in particular of each double row of print heads 212 are located at regular and preferably periodic intervals, as viewed in axial direction A. In any case, an entire working area of the at least one nozzle bar 213 preferably extends over at least 90% and more preferably 100% of the working width of printing machine 01 and/or the entire width of the barrel of the at least one first central cylinder 201 in axial direction A. At a or on both sides with respect to axial direction A, there may be a narrow region of printing substrate web 02 and/or the barrel of first central cylinder 201 that does not belong to the working area of nozzle bar 213. An entire working area of the at least one nozzle bar 213 is preferably made up of all working areas of print heads 212 of this at least one nozzle bar 213 and is preferably made up of all target areas of nozzles of these print heads 212 of this at least one nozzle bar 213. The entire working area of a double row of print heads 212, viewed in axial direction A, preferably corresponds to the working area of the at least one nozzle bar 213.

The at least one nozzle bar 213 preferably has a plurality of rows of nozzles in the circumferential direction with respect to the at least one first central cylinder 201. Each print head 212 preferably has a large number of nozzles, which are more preferably arranged in a matrix of multiple rows in the axial direction A and/or multiple columns, preferably in the circumferential direction of the at least one first central cylinder 201, such columns more preferably being arranged at an angle to the circumferential direction are arranged running, for example, to increase a resolution of a printed image. In a direction orthogonal to axial direction A, in particular in the transport direction along the transport path of printing substrate 02 and/or in the circumferential direction in relation to the at least one central cylinder 201, there are preferably multiple rows of print heads 212, more preferably four double rows and even more preferably eight double rows of Printheads 212 arranged one after the other. More preferably, at least during printing operation, a plurality of rows of print heads 212, more preferably four double rows and even more preferably eight double rows of print heads 212 are arranged one after the other aligned with the at least one first central cylinder 201 in the circumferential direction with respect to the at least one first central cylinder 201.

The print heads 212 are preferably aligned, at least during printing operation, in such a way that the nozzles of each print head 212 point essentially in the radial direction at the lateral cylinder surface of the at least one first central cylinder 201. Deviations from radial directions within a tolerance range of preferably at most 10° and more preferably at most 5° should be considered to be essentially radial directions. This means that the at least one print head 212 aligned with the lateral surface of the at least one first central cylinder 201 is aligned in a radial direction with respect to the rotational axis 207 of the at least one first central cylinder 201 with respect to the lateral surface of the at least one first central cylinder 201. This radial direction is a radial direction related to the axis of rotation 207 of the at least one first central cylinder 201. Each double row of print heads 212 is preferably assigned and/or can be assigned a printing ink of a specific color, for example one of the colors black, cyan, yellow and magenta or a varnish, for example a clear varnish. The corresponding inkjet printing unit 211 is preferably embodied as a four-color printing unit 211 and enables one-sided four-color printing of the printing material web 02. It is also possible to print fewer or more different colors with a printing unit 211, for example additional special colors. More or fewer print heads 212 and/or double rows of print heads 212 are then preferably arranged within this corresponding printing unit 211. In one embodiment, at least in the printing operation, a plurality of rows of Print heads 212, more preferably four double rows and even more preferably eight double rows of print heads 212 are aligned one after the other on at least one surface of at least one transfer body, for example at least one transfer cylinder and/or at least one transfer belt.

The at least one print head 212 preferably works according to the drop-on-demand method to generate ink droplets, in which ink droplets are specifically generated as needed. At least one piezo element is preferably used for each nozzle, which can reduce a volume filled with printing ink by a certain proportion at high speed when a voltage is applied. This displaces ink, which is ejected through a nozzle connected to the ink-filled volume and forms at least one droplet of ink. By applying different voltages to the piezo element, the adjustment path of the piezo element and thus the reduction in volume and thus the size of the ink droplets are influenced. In this way, color gradations in the resulting printed image can be implemented without changing the number of drops contributing to the printed image (amplitude modulation). It is also possible to use at least one heating element per nozzle, which generates a gas bubble at high speed in a volume filled with printing ink by evaporating printing ink. The additional volume of the gas bubble displaces ink, which in turn is ejected through the corresponding nozzle and forms at least one droplet of ink.

In the drop-on-demand method, it is not necessary to deflect the drops after they have been ejected from the corresponding nozzle, since it is possible to determine a target position of the respective drop of printing ink on the moving printing substrate web 02 with respect to the circumferential direction of the at least one first central cylinder 201 simply by an emission time of the respective drop of ink and a rotational speed of the first central cylinder 201 and/or by the rotational position of the first central cylinder 201. By activating each nozzle individually, drops of printing ink are transferred from the at least one print head 212 onto the printing substrate web 02 only at selected times and at selected locations. This occurs depending on the rotational speed and/or the angular position of the at least one first central cylinder 201, a distance between the respective nozzle and the printing substrate web 02, and the position of the target area of the respective nozzle with respect to the circumferential angle. This results in a desired print image that is designed depending on the activation of all nozzles. Ink droplets are ejected from the at least one nozzle of the at least one print head 212, preferably as a function of the rotational position of the first drive motor 208 specified by the machine controller 208 is included in a calculation of data for controlling the nozzles of the at least one print head 212, preferably in real time. A comparison with actual data of the rotational position of the first drive motor 208 is preferably not necessary and preferably does not take place. An exact and constant position of the printing substrate web 02 relative to the at least one first central cylinder 201 is therefore of great importance for a print image that is accurate and/or in register.

The nozzles of the at least one print head 212 are arranged in such a way that the distance between the nozzles and the printing substrate web 02 arranged on the lateral surface of the at least one first central cylinder 201 is preferably between 0.5 mm and 5 mm and more, at least when print head 212 is arranged in a printing position is preferably between 1 mm and 1.5 mm. The high angular resolution and/or the high sampling frequency of the angle of rotation sensor and/or the high accuracy of the target data on the rotational position of the first drive motor 208 of the first central cylinder 201, which is specified by the machine controller and processed by the first drive motor 208 of the first central cylinder 201, enables a very precise Determination of position and/or knowledge of the position of printing substrate web 02 relative to the nozzles and their target areas. A droplet flight time between the nozzles and the printing substrate web 02 is known, for example, through a teach-in process and/or through the known distance between the nozzles and the printing substrate web 02 and a known droplet speed. An ideal point in time for the ejection of a respective droplet is determined from the rotational angle position of the at least one first central cylinder 201 and/or the first drive 208 of the at least one first central cylinder 201, the rotational speed of the at least one first central cylinder 201 and the droplet flight time, so that a correct register and /or registration-correct imaging of the printing material web 02 is achieved.

At least one sensor embodied as a first printed image sensor is preferably arranged, more preferably at a point along the transport path of printing substrate web 02 after the first printing unit 211. The at least one first printed image sensor is embodied, for example, as a first line scan camera or as a first area camera. The at least one first printed image sensor is, for example, at least one CCD sensor and/or at least a CMOS sensor is formed. This at least one first print image sensor and a corresponding evaluation unit, for example the higher-level machine controller, are preferably used to monitor and control all print heads 212 that are located and/or active one behind the other in the circumferential direction of the at least one first central cylinder 201 and/or double rows of print heads 212 of the first printing unit 211 regulated. In a first embodiment of the at least one printed image sensor, only a first printed image sensor is provided, the sensor field of which covers the entire width of the transport path of printing substrate web 02. In a second embodiment of the at least one printed image sensor, only a first printed image sensor is provided, which is designed to be movable in direction A orthogonal to the direction of the transport path of printing substrate web 02. In a third embodiment of the at least one printed image sensor, a plurality of printed image sensors are provided, the respective sensor fields of which cover different areas of the transport path of printing substrate web 02. These areas are preferably offset from one another in direction A, orthogonal to the direction of the transport path of printing substrate web 02. A total of the sensor fields of the multiple print image sensors preferably covers the entire width of the transport path of printing substrate web 02.

A position of pixels formed by drops of printing ink originating from a first print head 212 is preferably compared with a position of pixels formed by drops of printing ink originating from a respective second central cylinder 201, viewed in the circumferential direction of the at least one first central cylinder 201 the respective first print head 212 lying print head 212 originate. This preferably occurs regardless of whether these first and second print heads 212, which are located and/or act one behind the other in the circumferential direction of the at least one first central cylinder 201, are processing the same or a different printing color. A matching of the positions of the print images originating from different print heads 212 is monitored. If the printing colors are the same, a register-accurate joining of partial images is monitored. If there are different printing colors, a register or color register is monitored. A quality control of the printed image is preferably also carried out using the measured values of the at least one printed image sensor.

In a regular printing operation, all print heads 212 are stationary. This ensures that all nozzles are aligned correctly and/or correctly in register over the long term. Different situations are conceivable in which a movement of the print heads 212 is necessary. A first such situation is a flying roll change or, in general, a roll change with an adhesive process. This results in a connection area that has to run through the entire transport path of printing substrate web 02. This connection area has a thickness, i.e. a smallest dimension, that is greater than the thickness of the printing material web 02. The connection area is essentially as thick as two printing material webs 02 and the adhesive strip together. As a result, difficulties can arise when the connection area passes through the gap between the nozzles of the print heads 212 and the lateral surface of the cylinder of the at least one first central cylinder 201. The at least one nozzle bar 213 can therefore be moved in at least one adjustment direction and/or along at least one adjustment path relative to the axis of rotation 207 of the at least one first central cylinder 201. In this way, the distance can be increased sufficiently, but must then be correspondingly reduced again. A second such situation arises, for example, during maintenance and/or cleaning of at least one of the print heads 212. The print heads 212 are preferably attached individually to the at least one nozzle bar 213 and can be detached individually from the at least one nozzle bar 213. This allows individual printheads 212 to be serviced and/or cleaned and/or replaced.

If several nozzle bars 213 that can be moved relative to one another are arranged, minimal misalignments of the nozzle bars 213 relative to one another can occur when at least one nozzle bar 213 is returned to a printing position. There may therefore be a need for alignment, in particular of all print heads 212 of one nozzle bar 213 to print heads 212 of other nozzle bars 213. If a print head 212 that is new and/or to be repositioned is attached to the at least one nozzle bar 213 to which at least one other print head 212 is already attached, this is the case This does not necessarily result in an exactly fitting alignment of this print head 212 to be repositioned and/or to be repositioned again, but at most by chance in relation to the at least one print head 212 that is already attached, specifically in the circumferential direction and/or in the axial direction A with respect to the at least one first central cylinder 201. This can also be the case here This means that there is a need for alignment, in particular of an individual print head 212 in relation to other print heads 212 of the same nozzle bar 213 and/or other nozzle bars 213.

At least one sensor preferably detects a position of the target area of at least one newly and/or rearranged print head 212 relative to a position of the target area of at least one previously attached print head 212. An installation position of the at least one newly and/or repositioned print head 212 in the circumferential direction with respect to the at least one first central cylinder 201 can be compensated for by controlling the nozzles of this print head 212, preferably analogously to the adjustment of print heads 212 in different double rows already described of print heads 212. An installation position of the at least one newly and/or repositioned print head 212 in axial direction A with respect to the at least one first central cylinder 201 is compensated by means of at least one adjustment mechanism. A plurality of print heads 212 preferably each have their own adjustment mechanism, more preferably all print heads 212 each have their own adjustment mechanism.

Printing press 01 has at least one supply system 251 for coating medium, in particular at least one printing ink supply system 251. A plurality of print heads 212, for example a plurality of print heads 212 of a common nozzle bar 213, in particular a plurality or more preferably all of the print heads 212 in a double row of print heads 212 preferably have a common supply system 251 for coating medium. The at least one supply system 251 and in particular the common supply system 251 for coating medium preferably has at least one standard supply 252, in particular at least one standard supply 252 for coating medium. At least one liquid line 253, preferably embodied as an ink line 253, is connected to the at least one normal reservoir 252 for each print head 212. In particular, each of at least two print heads 212 is preferably connected and/or can be connected directly to the at least one normal reservoir 252 via at least one first liquid line 253. The respective first liquid line 253 can be a flexible line, for example, in particular at least one hose. The at least one normal reservoir 252 is preferably connected via at least one supply line 254 and at least one output line 256 directly or via interposed components 263; 280; 285; 295, such as at least one second check valve 263 and/or at least one return reservoir 295 and/or at least one return pump 285 and/or at least one return valve 280 connected to at least one and preferably at least one identical buffer store 257, in particular buffer store 257, for the at least one coating medium and/or or arranged connectable. The extent of an interior space of the at least one standard reservoir 252 in the axial direction A is preferably at least as large as 50% of the width, measured in the axial direction A, of the working area of the nozzle bar 213 that has the at least two print heads 212 and/or at least 50% of the through the maximum width of printing material that can be processed with printing press 01.

The at least one printing unit 200; 400 has a plurality of standard supplies 252, more preferably at least one standard supply 252 for each printing color to be printed, for example four standard supplies 252. This is particularly preferably the case when print heads 212, which are assigned to different printing colors, are aligned at different angles to a vertical, since in this case different heights of liquid columns result for relevant hydrostatic pressures. This is particularly preferred when printheads 212; 412, for example by means of corresponding positioning devices 217; 218; 219; 221 are arranged to be movable relative to each other, for example in different positions such as printing positions and/or rest positions. More preferably, therefore, are two standard supplies 252 per double row of printheads 212; 412 arranged, so in particular four standard supplies 252 per coating agent. The printing unit 200; 400 a return accumulator 295 for each nozzle beacon 213 and/or each positioning device 217; 218; 219; 221, which is at least indirectly connected to four standard supplies 252 each.

The standard reservoir 252 preferably has a fill level that is constant, except for deviations within a narrow tolerance range, at least in one printing operation and more preferably permanently. This constant fill level can be implemented, for example, by an inflow of printing ink and an overflow outflow 258 . An overflow drain 258 is to be understood as a drain that defines a maximum height of a fill level, in particular of the normal reservoir 252 . A regulated overflow drain 258 is possible, which has, for example, at least one level gauge and at least one valve. However, at least one passive overflow drain 258 is preferably provided. A passive overflow drain 258 is preferably an overflow drain 258, which essentially consists of an opening, the lower edge of which is arranged at a specific height and which thereby defines a maximum filling level. The at least one normal reservoir 252 and/or the at least one drain line 256 preferably has at least one preferably passive overflow drain 258, the drain side of which is preferably direct or via intermediate components 263, 280; 285; 295 is connected and/or arranged to be connectable to the at least one intermediate store 257, more preferably the at least one identical intermediate store 257 to which the at least one normal supply 252 is also connected via the at least one feed line device 254 connected and / or arranged connectable. At least one filter device 259 and/or at least one degassing device 261 and/or at least one damping device 299 for damping pulsations is preferably arranged along the at least one supply line 254. At least one valve 262, preferably embodied as a first shutoff valve 262, is preferably arranged within the at least one supply line 254 and/or at least one valve 263, preferably embodied as a second shutoff valve 263, is arranged within the at least one discharge line 256.

At least one first liquid pump 264 is preferably arranged in the at least one supply line 254. Coating medium, in particular printing ink, is preferably constantly fed into the normal reservoir 252, with excess coating medium being discharged through the at least one overflow outlet 258 and a height level of the coating medium in the normal reservoir 252 being determined by the arrangement height of an opening in the overflow outlet 258. A controlled and/or regulated normal pressure preferably prevails in the normal reservoir 252, which is more preferably controlled and/or regulated relative to an ambient pressure, in particular atmospheric pressure. The constant height level and the controlled and/or regulated normal pressure ensure that there is a constant pressure within the coating medium at the nozzle openings of the print heads 212 . Thus, constant operating conditions for the printheads 212 are ensured. At least one gas volume is preferably arranged in at least one first gas chamber 266 of the at least one standard reservoir 252, in which there is a standard pressure that is lower than an ambient pressure that prevails on an ejection side of at least one nozzle of the at least one print head 212. The normal pressure in the normal reservoir 252 is therefore preferably a negative pressure compared to the ambient pressure. This negative pressure is preferably between 4 kPa (four kilopascals), ie 40 mbar (forty millibars) and 6 kPa (six kilopascals), ie 60 mbar (sixty millibars), more preferably between 4.5 kPa (four and a half kilopascals), ie 45 mbar (forty-five millibars) and 5.5 kPa (five and a half kilopascals), i.e. 55 mbar (fifty-five millibars). When setting the pressure, attention is preferably paid to the installation position of the print head 212, because its inclined position leads to a different height level and thus to a different hydrostatic pressure, which can be compensated for via this pressure. The at least one standard reservoir 252 preferably extends over at least 50%, more preferably at least 75% and even more preferably at least 90% of a width of the working area of the at least one nozzle bar 213 in the axial direction A and/or the working width of printing press 01.

At least one return reservoir 295 is preferably arranged in the at least one discharge line 256, more preferably at a lower level than the at least one normal reservoir 252. At least one return pump 285 is preferably arranged along the at least one discharge line 256, in particular downstream of the at least one return reservoir 295, for example around To promote coating agent back to the preferably higher intermediate storage 257. The at least one intermediate reservoir 257 is preferably, but not necessarily, located higher than the at least one normal reservoir 252. At least one return valve 280 is preferably located along the at least one discharge line 256 before or preferably after the at least one return pump 285. In this way it is ensured that there is a circuit of coating agent within which coating agent can be transported by means of pumps and gravity.

The at least one first liquid pump 264 preferably pumps coating medium, for example printing ink, from intermediate reservoir 257 into normal reservoir 252. Preferably, at least one and preferably exactly one volume provided as the first gas chamber 266 is arranged in the at least one normal reservoir 252. The at least one first gas chamber 266 is preferably connected to at least one vacuum source 268; 276; 277 connected and/or arranged in a connectable manner. The at least one vacuum source 268; 276, 277 is designed, for example, as at least one gas pump and/or at least one vacuum buffer 276 and/or at least one vacuum regulator 277. At least one liquid trap 293, in particular a coating agent trap 293, is preferably arranged in the at least one first gas line 267. The same normal pressure prevails in a second gas chamber 269 of intermediate reservoir 257 as in the at least one first gas chamber 266 of the at least one normal reservoir 252. This is achieved, for example, by connecting the second gas chamber 269 by means of at least one second gas line 271 to at least one second gas pump and /or the at least one first gas chamber 266 and/or the at least one first gas pump 268 and/or the at least one vacuum buffer 276 and/or more preferably the at least one vacuum regulator 277. The at least one second gas line 271 preferably has at least one vacuum sensor 294.

At least one third gas chamber 290 is preferably provided in the at least one return accumulator 295. The same normal pressure prevails in the third gas chamber 290 of the return accumulator 295 as in the at least one first gas chamber 266 of the at least one normal reservoir 252, at least as long as the at least one first valve 262 and the at least one second valve 263 are closed. This is possible, for example, by connecting the third gas chamber 290 by means of at least one equalizing line 286 to the at least one second gas pump and/or the at least one first gas chamber 266 and/or the at least one first gas pump 268 and/or the at least one vacuum buffer 276 and/or more preferably implemented in the at least one vacuum regulator 277. The at least one equalizing line 286 preferably has at least one liquid trap 293, in particular coating agent trap 293.

The at least one liquid trap 293, for example coating agent trap 293, is embodied, for example, as at least one cavity that has an inlet and an outlet. The entrance is preferably a distance above a lowest point of the cavity. The exit is preferably at the level of the entrance or higher. A cross section of the cavity is preferably larger than a cross section of a line connected to the input. Vacuum is preferentially applied at the exit, causing gas to be drawn over the entrance and through the cavity. If liquid is also sucked in, it settles at the lowest point of the cavity due to gravity and is not transported into the vacuum line connected to the outlet. A sensor and/or manually, for example optically, can be used to check whether there is liquid at the lowest point of the cavity and needs to be removed. Removal can take place manually or automatically by means of an outlet which can be closed and/or is connected to a pump, for example at the lowest point of the cavity.

At least one vacuum pump 268 is preferably provided, to which the at least one vacuum buffer 276 is connected via at least one vacuum supply line 278. The at least one vacuum buffer 276 is preferably connected and/or can be connected to the at least one degassing device 261 via at least one degassing line 279. The at least one vacuum buffer 276 is preferably connected and/or arranged to be connectable via at least one vacuum line 281 to at least one vacuum regulator 277, which is and/or can be connected to an environment via at least one air supply filter 292. At least one normal-pressure line 282 preferably connects the at least one vacuum regulator 277 to at least one pressure regulator 283. Vacuum regulator 277 is preferably used to set the pressure in the at least one normal-pressure line 282 to normal pressure, in particular by admixing ambient air, which is at atmospheric pressure, for example, to that from the Vacuum buffer 276 originating air. The at least one pressure regulator 283 is preferably connected to at least one compressed air source 284, for example at least one air pump 284, or to an atmospheric connection 284. The at least one pressure regulator 283 is preferably arranged to be connected and/or connectable to the at least one first gas chamber 266 of the at least one normal reservoir 252 via the at least one first gas line 267. As a result, normal pressure or an overpressure can be generated in the first gas line 267 and thus in the first gas space 266 of the normal reservoir 252 by means of the pressure regulator 283 . Any gas volumes that occur, which are trapped when the system is filled with coating agent, can preferably be pumped out by means of respective equalizing lines 286 and/or can at least be subjected to the respective normal pressure. Such gas volumes can occur, for example, in an area of the at least one check valve 263 and/or in particular in the area of the at least one return reservoir 295.

The at least one buffer store 257 is preferably connected to at least one buffer store 272, more preferably via at least one supply line 273. In an exemplary first embodiment of the supply line 273, the at least one buffer store 257 is connected to the at least one buffer store via at least one supply line 273 embodied as a suction line 273 272 connected. Then, for example, no liquid pump or no pump at all is arranged along the at least one suction line 273 between the at least one buffer reservoir 272 and the at least one intermediate reservoir 257 and/or there is ambient pressure in buffer reservoir 272 and/or there is none between buffer reservoir 272 and intermediate reservoir 257 Arranged pump, but ink is promoted by the relative negative pressure from the buffer memory 272 in the intermediate memory 257. In this way, particularly constant conditions in the intermediate reservoir 257 and in the normal reservoir 252 can be ensured, in particular with regard to the normal pressure. In a preferred exemplary second embodiment of supply line 273, supply line 273 has at least one supply pump 296 and/or preferably at least one flow measuring device 297 and/or preferably at least one supply valve 298 and/or local supply valve 298. For example, after a supply valve 298, a supply line 273 can be divided into several sub-lines, which are connected to different pressure units 200; 400 are connected and designed to be closable independently of one another by means of local supply valves 2968. (In 8b points a dashed line indicates such a possibility.)

The buffer memory 272 is and/or can be connected, for example, to an exchangeable reservoir 274 which, for example, is also used to supply other print heads 212 and/or other nozzle bars 213 and/or other printing units 200; 400 and/or other printing presses 01. The at least one buffer store 272 is preferably connected and/or can be connected via at least one second supply line 273, for example suction line 273, to at least one other intermediate store 257, which supplies at least one other, for example second, pressure unit 200; 400 is assigned to the printing press 01. For example, at least one storage pump 289 and at least one storage valve 291 are arranged along at least one storage line 288 between the at least one storage tank 274 and the at least one buffer store 272. The at least one buffer reservoir 272 has at least one overflow 287, for example, through which excess coating agent can flow out in an emergency, for example in the event of a malfunction of the at least one supply pump 289 and/or the at least one supply valve 291. This prevents, in particular, the normal pressure from having a negative effect could become. In one exemplary embodiment, the at least one buffer store 272 is omitted and reservoir 274 is arranged directly instead of buffer store 272, with supply pump 289 then being omitted, for example, and coating agent being supplied by supply pump 296.

200 per printing unit is preferred; 400 and coating means are each arranged at least one and more preferably precisely one buffer store 257. At least one standard supply 252 is preferably provided for each printing unit and coating medium, and more preferably exactly four standard supplies 252 are provided. At least one and more preferably exactly one return accumulator 295 is preferably provided for each printing unit and coating medium. For example, in a four-color press with two printing units 200; 400 eight latches 257 and thirty-two normal stores 252 and eight rewind stores 295 are arranged. 200 per printing unit is preferred; 400 and more preferably exactly one vacuum source 268 for each printing press 01. Preferably, exactly one reservoir 274 and/or exactly one buffer memory 272 is provided for each coating medium, in particular printing ink, for the entire printing press 01.

The at least one buffer store 257 is preferably stationary relative to a frame 231 of the respective printing unit 200; 400. The at least one normal supply 252 is preferably shared with the at least one print head 212; 412 and/or the at least one nozzle bar 213; 413 by means of a corresponding positioning device 217; 218; 219; 221 is movably arranged and/or the at least one return supply 295 is arranged together with the at least one print head 212; 412 and/or the at least one normal supply 252 and/or the at least one nozzle bar 213; 413 by means of a corresponding positioning device 217; 218; 219; 221 movably arranged. This ensures, in particular, constant hydrostatic pressure conditions, for example within the at least one standard reservoir 257 and/or within the at least one print head 212; 412

Printing machine 01 preferably permits a method for cleaning at least one nozzle of at least two print heads 212 embodied as inkjet print heads 212 on printing machine 01, with printing machine 01 having the at least one supply system 251, which preferably supplies the at least one standard supply 252 for the at least one coating medium and the has at least one buffer store 257, preferably for the at least one coating medium, and wherein each of the at least two print heads 212; 412 is preferably connected and/or connectable directly to the at least one normal reservoir 252 via at least one first liquid line 253, and wherein the at least one normal reservoir 252 is connected via the at least one supply line 254 and the at least one discharge line 256 to the at least one, preferably identical, buffer store 257 and wherein initially each of the at least one supply line 254 is preferably closed by means of the at least one first shutoff valve 262 and each of the at least one discharge line 256 is preferably closed by means of the at least one second shutoff valve 263, and wherein a pressure within the within the at least one normal reservoir 252 arranged gas volume is preferably increased by means of at least the at least one first gas pump 268 and/or by means of at least the at least one compressed air source 284 and thereby coating medium and in particular printing ink through the at least one nozzle of the at least two print heads 212 g is promoted and preferentially ejected.

A plurality of print heads 212, for example a plurality of print heads 212 of a common nozzle bar 213, in particular a plurality or more preferably all of the print heads 212 in a double row of print heads 212 preferably have a common voltage supply system. Preferably, at least one common power line extends inside the power supply half of the respective at least one nozzle bar over at least 50%, more preferably at least 75% and even more preferably at least 90% of a width of the working area of the respective at least one nozzle bar 213 in the axial direction A and/or the working width of the printing press 01. Preferably, each Print head 212 of this respective at least one nozzle bar 213 each has at least its own voltage line, which is connected to this common power line of the voltage supply. Each print head 212 of this at least one nozzle bar 213 preferably has at least one data line of its own, which is connected to a computing unit that is located outside the working area of the respective at least one nozzle bar 213 with respect to axial direction A and/or outside each the transport path of printing press 01 provided for printing substrate 02. Thus, at least one data line per print head 212 of this at least one nozzle bar 213 runs parallel to one another, at least along a section of the nozzle bar 213 extending in the axial direction A.

Printing press 01 preferably has at least one printing unit 200; 400, wherein the at least one printing unit 200; 400 at least one, preferably having an ejection direction, as an inkjet print head 212; 412 formed print head 212; 412 and preferably several, preferably each having an ejection direction, as ink jet print heads 212; 412 formed printheads 212; 412 and preferably at least one axis of rotation 207; 407 rotatable printing material guide element 201; 401, by means of which at least one transport path provided for preferably web-type printing substrate 02 is and/or can be at least partially fixed. The at least one nozzle and more preferably each nozzle preferably has an ejection direction that is clearly defined relative to the nozzle and the print head 212 having the nozzle. Ejection directions of nozzles of a common print head 212 are preferably aligned parallel to one another. The ejection direction of at least one nozzle of the at least one print head 212 is preferably directed at a lateral surface of the at least one printing material guide element 201, at least when the print head 212 is in a printing position; 401 aligned.

The at least one printing material guide element 201; 401 within the at least one printing unit 200; 400 and/or the at least one printing material guide element 201; 401 as at least one web guide roller and/or one deflection roller 203; 214; 312; 403; 414 and/or as at least one central printing cylinder 201; 401 and/or as at least one transmission body.

The at least one print head 212; 412 with at least one positioning device 217; 218; 219; 221 connected and/or connectable. More preferably, the at least one print head 212 is permanently connected to the at least one positioning device 217; 218; 219; 221 and only for assembly and/or disassembly purposes and/or to replace the at least one print head 212 of the at least one positioning device 217; 218; 219; 221 separable. The at least one printing unit 200; 400 at least two and more preferably at least four nozzle bars 213; 413, each of which has at least two print heads 212; 412 have. Preferably, each nozzle bar is 213; 413 with at least one positioning device 217; 218; 219; 221 connected and/or connectable and in this way is at the same time each corresponding print head 212; 412 with at least one positioning device 217; 218; 219; 221 connected and/or connectable. The at least two, in particular at least four, nozzle bars 213; 413 by means of a respective positioning device 217; 218; 219; 221 arranged to be movable along a respective, for example, linear adjustment path. Preferably, at least one of at least two print heads 212 can be arranged, more preferably by means of a positioning device 217 assigned to it, at least either in a printing position assigned to it or in at least one rest position assigned to it. More preferably, each of at least four printheads 212; 412 more preferably by means of a positioning device 217; 218; 219; 221 can be optionally arranged at least either in a printing position assigned to it or in at least one rest position assigned to it.

The at least one print head 212 is preferably positioned in particular by means of at least one positioning device 217; 218; 219; 221 can be arranged in at least one printing position. A print head 212 arranged in its printing position is preferably characterized in that at least one nozzle of the at least one print head 212 is moved by a designated transport path for printing substrate 02 and/or by printing substrate 02 and/or by a transfer body and/or by printing substrate guide element 201; 401 has a distance which is at most 5 mm and more preferably at most 1.5 mm and/or which is preferably at least 0.5 mm and more preferably at least 1 mm.

A print head 212 arranged in its printing position is preferably characterized in that a majority of all nozzles of the at least one print head 212 have a respective ejection direction from a surface normal of a surface element of the intended transport path for printing substrate 02 that is closest to the respective nozzle and/or from a surface normal of a surface element of the printing substrate 02 that is closest to the respective nozzle and/or from a surface normal of a surface element of a transfer body that is closest to the respective nozzle and/or from a surface normal of a surface element of a printing material guide element 201 closest to the respective nozzle; 401 deviates by at most 10° and more preferably by at most 6° and even more preferably by at most 3°.

A print head 212 arranged in its printing position is preferably characterized in that a majority of all nozzles of the at least one print head 212 have a respective ejection direction that deviates from a vertical direction by at most 30°. Preferably, at least when print head 212 is in the printing position, an ejection direction of at least one and preferably each nozzle of at least this print head 212 is directed towards at least one printing material guide element 201; 401 and/or at least one transmission body aligned. Preferably, at least one nozzle of this print head 212 is arranged in a position provided for a printing operation of this at least one nozzle, at least when print head 212 is arranged in the printing position.

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

Regardless of whether they are designed as a maintenance position and/or assembly position, the respective idle positions of the print heads 212 are preferably characterized in that different print heads 212 in their respective idle positions are at least partially different distances from the intended transport path for printing substrate 02 and/or from a printing substrate 02 and/or to a transfer body and/or to the printing material guide element 201; 401, in particular central cylinder 201; 401 have. Preferably, each nozzle of the at least one printhead 212; 412 from a surface element of the intended transport path for printing substrate 02 that is closest to the respective nozzle and/or from a surface element of the printing substrate 02 that is closest to the respective nozzle and/or from a surface element of a transfer body that is closest to the respective nozzle and/or from a printing substrate guide element 201; 401, in particular central cylinder 201; 401 has a distance of at least 10 cm and more preferably at least 25 cm.

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

The respective mounting positions of the print heads 212 are preferably characterized in that different print heads 212 arranged in their respective mounting positions have different distances from one another than in their respective printing positions and/or in their respective maintenance positions. Preferably, each nozzle of the at least one print head 212; 412 from a surface element of the intended transport path for printing substrate 02 that is closest to the respective nozzle and/or from a surface element of the printing substrate 02 that is closest to the respective nozzle and/or from a surface element of a transfer body that is closest to the respective nozzle and/or from a printing substrate guide element 201; 401, in particular central cylinder 201; 401 has a distance of at least 20 cm and more preferably at least 35 cm. These distances are preferably measured in the axial projection plane.

In a first possible embodiment, the at least one positioning device 217; 218, 219; 221 has at least one positioning guide 224 embodied as a lever arm 224, for example a plurality, in particular four, positioning guides 224 preferably embodied as lever arms 224 and, for example, one positioning guide 224 preferably embodied as a lever arm 224 per movable nozzle bar 213 and/or per movable print head 212. For example, and in particular when the at least one positioning guide 224 is embodied as at least one lever arm 224, the travel of the at least one print head 212; 412 formed as at least one circular arc. For example, a pivot axis 227 of the at least one lever arm 224 is arranged parallel to the axial direction A. This ensures that movements of the at least one lever arm 224 and the at least one print head 212 and/or nozzle bar 213 arranged thereon, for example, only take place in a plane that is defined by a surface normal that is arranged parallel to the axial direction A, in particular in the axial projection plane. For example, at least two positioning devices 217; 218 pivot axes 227 that differ from one another. For example, at least two positioning devices have a common pivot axis 227 in addition or as an alternative.

For example, with respect to the first possible embodiment of the at least one positioning device 217; 218, 219; 221 respective maintenance positions of the print heads 212 in that, when the print head 212 is arranged in its respective maintenance position, all nozzles of this print head 212 have ejection directions which, apart from a tolerance range of preferably at most 20° and more preferably at most 12° and even more preferably at most 8° in have a vertical direction, in particular a vertically downward direction. In particular, a direction that is the arithmetic mean of all ejection directions of all nozzles of the at least one print head 212; 412 having nozzle bar 213, from the vertical direction by at most 12°, more preferably at most 8° and even more preferably at most 4°.

For example, with respect to the first possible embodiment of the at least one positioning device 217; 218, 219; 221 respective maintenance positions of the print heads 212 in that nozzles of different print heads 212 arranged in their respective maintenance positions have ejection directions that are at different angles to a respective closest surface element of the intended transport path for printing material 02 and/or the web guiding element 201; 401 and/or the transfer body and/or the printing substrate 02, with this difference in angle more preferably being at least 2°, preferably at least 6° and more preferably at least 10°. A plane in which this angle is measured is preferably defined by a surface normal that lies parallel to the axial direction A or deviates from this axial direction A by at most 2°. This plane is preferably called the axial projection plane.

For example, with respect to the first possible embodiment of the at least one positioning device 217; 218, 219; 221 respective mounting positions of the print heads 212 in that nozzles of different print heads 212 arranged in their respective mounting positions have ejection directions that are at different angles to a respective closest surface element of the intended transport path for printing material 02 and/or the web guiding element 201; 401 and/or the transfer body and/or the printing substrate 02, with this difference in angle more preferably being at least 2°, preferably at least 6° and more preferably at least 10°. A plane in which this angle is measured is preferably defined by a surface normal that lies parallel to the axial direction A or deviates from this axial direction A by at most 2°. More preferably, this plane is the axial projection plane.

For example, with respect to the first possible embodiment of the at least one positioning device 217; 218, 219; 221 respective mounting positions of the print heads 212 in that, when the print head 212 is arranged in its respective mounting position, all nozzles of this print head 212 have ejection directions that deviate from a vertical direction by preferably at least 4° and more preferably at least 6° and even more preferably at least 8° , in particular a vertically downward direction. In particular, a direction that is the arithmetic mean of all ejection directions of all nozzles of the at least one print head 212; 412 having nozzle bar 213, from a vertical direction by at least 4°, more preferably at least 6° and even more preferably at least 8°.

For example, with respect to the first possible embodiment of the at least one positioning device 217; 218, 219; 221 respective mounting positions of the print heads 212 characterized in that when the print head 212 is arranged in its respective mounting position, a direction that is the arithmetic mean of all ejection directions of all nozzles of the at least one print head 212 arranged in its mounting position; 412 is defined, by a surface normal of a surface element of the intended transport path for printing substrate 02 that is closest to the respective nozzle and/or by a surface normal of a surface element of printing substrate 02 that is closest to the respective nozzle and/or by a surface normal of a surface element of a surface element that is closest to the respective nozzle Transfer body and/or a printing material guide element 201; 401 deviates by at least 20° and more preferably by at least 30°.

For example, with respect to the first possible embodiment of the at least one positioning device 217; 218, 219; 221 at least one mounting position of at least one print head 212 and preferably all print heads 212 in that in the axial projection plane and/or in a plane that is defined by a surface normal that is parallel to the axial direction A or from this axial direction A around deviates by at most 2°, ejection directions of all nozzles of this print head 212 arranged in its printing position have a horizontal component which is exactly opposite to a horizontal component which ejection directions of all nozzles of this print head 212 arranged in its mounting position have. In particular, this results preferably in the fact that respective print heads 212 can be transferred from their printing position via their maintenance position into their assembly position by at least one pivoting movement.

In a second and preferred embodiment of the at least one positioning device 217; 218, 219; 221 has the at least one positioning device 217; 218, 219; 221 at least one linear positioning guide 224, preferably embodied as a rail 224, and more preferably a plurality, in particular four, positioning guides 224, preferably embodied as rails 224, and even more preferably at least one positioning guide 224, preferably embodied as a rail 224, per movable nozzle bar 213 and/or per movable print head 212 on. More preferably, two positioning guides 224 embodied as rails 224 are provided for each nozzle bar 213, in particular one rail 224 for each axial end of the at least one printing material guide element 201; 401, i.e. a total of at least eight rails 224 per printing unit 200; 400. Preferably, and in particular when the at least one positioning guide 224 is embodied as at least one rail 224, the travel of the at least one print head 212; 412 formed linearly.

Preference is therefore given to a printing press 01 that has at least one printing unit 200; 400, which has at least two, more preferably at least three and even more preferably at least four print heads 412, 212 and at least one rotating axis 207; 407 rotatable printing material guide element 201; 401, each of the at least two, preferably at least three and more preferably at least four print heads 212; 412 by means of a respective, at least this print head 212; 412 associated positioning device 217; 218; 219; 221 is arranged to be movable along a respective linear adjustment path. More preferably, the linear travels in respective directions that differ in pairs by at least 10°, more preferably at least 15° and independently of the lower limit by at most 150°, more preferably at most 120°, even more preferably at most 90° and even further preferably differ by at most 60°. All adjustment directions of positioning devices 217 preferably differ; 218; 219; 221 of the same printing unit 200; 400 in all possible pairwise comparisons by at least 10°, more preferably at least 15° and independently of the lower limit by at most 150°, more preferably at most 120°, even more preferably at most 90° and even more preferably at most 60°. Setting directions of print heads 212 preferably differ; 412, the adjacent positioning devices 217; 218, 219; 221 by at least 10°, more preferably at least 15° and, independently of the lower limit, by at most 60°, more preferably at most 45°, even more preferably at most 30° and even more preferably at most 20°. It is preferably ensured that movements of the at least one print head 212 and/or nozzle bar 213 only take place in a plane that is defined by a surface normal that is arranged parallel to the axial direction A, in particular in the axial projection plane.

Each of the at least two, preferably at least three and more preferably at least four print heads 212; 412 by means of the respective positioning device 217; 218; 219; 221 can be optionally arranged at least either in a printing position assigned to it and in at least one maintenance position assigned to it, wherein in the at least one maintenance position of a first print head 212; 412 of the at least two, preferably at least three and more preferably at least four print heads 212; 412 at least one maintenance device 222 of at least one first nozzle of the at least one first print head 212; 412 is assigned and/or assignable. What is described above and below with regard to the at least one maintenance device 222 preferably applies to each maintenance device 222, in particular also in the case of two, three or four maintenance devices per printing unit 200; 400. The at least one maintenance device 222 is forthcoming movably along at least one staging path between at least one parking position and at least one usage position, in particular by means of at least one feed device 223. If there are multiple maintenance devices 222, each maintenance device 222 is preferably assigned its own staging path, its own parking position, and its own usage position. An optionally present component of the respective supply path of the at least one maintenance device 222 in a direction defined by the axis of rotation 207; 407 of the at least one rotatable printing material guide element 201; 401 is preferably no more than 50% of a width, measured in axial direction A, of a working area of a nozzle bar 213 having the at least one print head 212 and/or no more than 50% of a working width of printing machine 01 defined by a maximum width of printing material that can be processed with printing machine 01 .

The adjustment directions of the linear adjustment paths are preferably each orthogonal and in particular radial to the axis of rotation 207; 407 of the at least one rotatable printing material guide element 201; 401 aligned. Preferably, all printheads are 212; 412 are arranged in their printing positions and their rest positions, in particular maintenance positions and/or assembly positions, in such a way that their respective nozzles always have the same alignment with respect to their ejection direction. Preferably, the printheads 212; 412 linear travels.

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 one positioning drive 226 per movable nozzle bar 213. For example, a positioning drive 226 is assigned to each positioning guide 224 . The at least one positioning drive 226 is embodied, for example, as at least one hydraulic cylinder 226 and/or as at least one pneumatic cylinder 226 and/or preferably as at least one electric motor 226. The at least one positioning drive 226 is preferably arranged in such a way that it can selectively move the at least one print head 212 into its printing position or its maintenance position or its assembly position and more preferably also hold it there. The at least one positioning drive 226 is preferably embodied as at least one electric motor 226, for example as at least one stepper motor 226, and/or is connected to at least one threaded spindle. The at least one threaded spindle is preferably in engagement with at least one spindle nut, which is connected to the respective nozzle bar 213.

At least four positioning devices 217; 218; 219; 221, by means of which at least one nozzle bar 213 and/or in particular a plurality of print heads 212 assigned to the same printing ink are designed to be movable together. In particular, this makes it possible to provide configurations in which the print heads 212 of at least one nozzle bar 213 and/or at least one printing color are arranged in their printing position, while the print heads 212 of at least one other nozzle bar 213 and/or another printing color are in a rest position, for example a maintenance position are arranged. As a result, for example, all print heads 212 of one printing color, for example black, can be activated, while all print heads 212 of other printing colors are held in a maintenance position and are protected there from drying out and/or cleaned by suitable means, for example.

At least one first locking element is preferably arranged, for example at least one pressure stop. The at least one first locking element can preferably be used to fix the at least one print head 212 in its printing position, for example by the at least one positioning drive 226, in particular pneumatic cylinder 226 and/or electric motor 226, locking the at least one print head 212 and/or the at least one print head 212 Nozzle bar 213 pulls and/or presses against the at least one pressure stop. This ensures that the print position is reproducible and precisely defined.

At least one second locking element is preferably arranged, for example at least one assembly stop. The at least one print head 212 can preferably be fixed in its mounting position by means of the at least one second locking element, for example by the at least one positioning drive 226, in particular pneumatic cylinder 226 and/or electric motor 226, locking the at least one print head 212 and/or the at least one print head 212 Nozzle bar 213 pulls and/or presses against the at least one assembly stop. This ensures that the assembly position is reproducible and precisely defined.

At least one third locking element is preferably arranged, for example at least one maintenance stop. The at least one third locking element can preferably be used to fix the at least one print head 212 in its maintenance position, for example by the at least one positioning drive 226, in particular pneumatic cylinder 226 and/or electric motor 226, locking the at least one print head 212 and/or the at least at least one nozzle bar 213 having a print head 212 against the at least one maintenance stop and/or presses it. This ensures that the maintenance position is reproducible and precisely defined.

At least one locking element, preferably the at least one third locking element and/or at least one locking element arranged between two locking elements and/or at least one maintenance stop is preferably designed to be movable in order to facilitate movements between extreme positions of an adjustment path of the at least one print head 212 and/or the at least one nozzle bar 213 , To allow in particular between the printing position and mounting position. For example, at least one maintenance device 222 is embodied as at least one movable stop, in particular as a maintenance stop.

In the at least one maintenance position, at least one maintenance device 222 of at least one nozzle of the at least one print head 212; 412 and/or can be assigned, and more preferably the at least one maintenance device 222 is assigned to at least one nozzle of the at least one print head 212; 412 is and/or can be arranged at least partially opposite the at least one nozzle with respect to a respective ejection direction.

A position of this respective at least one nozzle when the print head 212 is arranged in the at least one printing position and a position of this respective at least one nozzle when the print head 212 is arranged in the at least one maintenance position and/or assembly position preferably differ in terms of the axis of rotation 207; 407 of the at least one printing material guide element 201, preferably embodied as a central cylinder 201; 401 defined axial direction A in relation 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 width, measured in axial direction A, of a working area of the at least one print head 212; 412 and/or no more than 50% and more preferably no more than 20% and even more preferably no more than 10% and even more preferably no more than 2% of the working width of printing machine 01 defined by a maximum width of printing material that can be processed with printing machine 01.

When the print head 212 is in the at least one maintenance position, at least one maintenance device 222 is preferably located between at least one nozzle of the at least one print head 212; 412 and a region of the transport path provided for printing substrate 02 that is closest to this at least one nozzle and/or when print head 212 is located in the at least one maintenance position, at least one maintenance device 222 is located 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 transfer body can be arranged and / or arranged.

The at least one maintenance device 222 preferably extends in each spatial direction by more than 3 mm, more preferably by more than 10 mm. The at least one maintenance device 222 preferably extends in the axial direction A that is at least as large as the working area of the at least one nozzle bar 213 in the axial direction A. The at least one maintenance device 222 preferably has a Extension that is at least as large as the working area of the at least one nozzle bar 213 in the transport direction of printing substrate 02. This means that all nozzles of all print heads 212 of the at least one nozzle bar 213 can preferably be serviced at the same time. For example, even larger expansions result in the respective directions due to edge regions and/or housings.

The at least one nozzle bar 213 can preferably be moved completely independently of those components of printing press 01 that are arranged in contact with printing substrate web 02 and/or tangential to the intended transport path for printing substrate 02. Cleaning and/or maintenance can thus be carried out without affecting the web of printing material 02 and, in particular, without having to remove the web of printing material 02 from the printing press 01.

The at least one maintenance device 222 can preferably be moved at least orthogonally to the axial direction A. A delivery path for the at least one maintenance device 222 is preferably defined by at least one feed device 223. The at least one feed device 223 is preferably embodied as at least one guidance system 223. The at least one maintenance device 222 is preferably arranged to be movable along the at least one provision path between at least one parking position and at least one use position. Preferably, the delivery path of the at least one maintenance device 222, which is more preferably defined by the at least one feed device 223, does not have a component in the axial direction A that 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 width of the work measured in the axial direction A area of the nozzle bar 213 that has the at least one print head 212 and/or no more than 50%, more preferably no more than 20%, even more preferably no more than 10% and even more preferably no more than 2% of the working width of the printing press defined by the maximum substrate width that can be processed with printing press 01 01. This means that a component that may be present in the supply path of the at least one maintenance device 222 in the axial direction A preferably accounts for at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of the in the axial measured in direction A of the working area of the nozzle bar 213 having the at least one print head 212 and/or no more than 50%, more preferably no more than 20%, even more preferably no more than 10% and even more preferably no more than 2% of the maximum that can be processed with printing press 01 substrate width specified Ar working width of the printing machine is 01.

A distance of a possible axial movement of the at least one maintenance device 222, if it is present, is therefore preferably at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of that measured in axial direction A width of the working area of the at least one print head 212; 412 and/or no more than 50%, more preferably no more than 20%, even more preferably no more than 10% and even more preferably no more than 2% of the working width of printing machine 01 defined by the maximum width of printing material that can be processed with printing machine 01. More preferably, the at least one maintenance device 222 can only be moved orthogonally to the axial direction A. The distance of a movement is in particular a length of a path covered and in this case in particular only the length of a component of the path covered or to be covered in the axial direction A, if such a component is present.

Preferably, a planned position of the at least one maintenance device 222 in its parking position, based on axial direction A, differs from a planned position of the at least one maintenance device 222 in its operating position, based on axial direction A, by at most 50%, more preferably at most 20% more preferably at most 10% and even more preferably at most 2% of a width, measured in axial direction A, of a working area of a nozzle bar 213 having the at least one print head 212 and/or at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably no more than 2% of a working width of printing machine 01 defined by a maximum printing material width that can be processed with printing machine 01.

Each maintenance device 222 preferably has at least one feed device 223 of its own. The at least one feed device 223 preferably has at least one feed drive 229 and at least one traction device 228 and/or push device 228. In one embodiment, the at least one feed drive 229 is stationary on a frame 231 of the at least one printing unit 200; 400 and the at least one pulling means 228 and/or pushing means 228 is connected to the at least one maintenance device 222 and relative to the frame 231 of the at least one printing unit 200; 400 is designed to be movable, for example as a chain 228. In an alternative embodiment, the at least one feed drive 229 is arranged to be movable, in particular together with the at least one maintenance device 222, and the at least one traction means 228 and/or pushing means 228 is arranged in a stationary manner and, for example, as at least one rail 228 and/or toothed rack 228 is formed. The at least one feed device 223 preferably has at least one rotatable threaded spindle, which engages with at least one spindle nut mounted on the respective maintenance device 222 and is rotatably arranged, for example, by means of at least one feed drive 229, preferably embodied as a stepping motor 229.

At least two maintenance devices 222 are preferred, which, in particular by means of their respective feed system 223, separate the at least two, in particular at least four, print heads 212; 412 are assigned and/or assignable, at least in their respective parking positions, at least partially arranged one above the other. These at least two maintenance devices 222 are more preferably, which, in particular by means of their respective feed system 223, are different from the at least two, in particular at least four, print heads 212; 412 are assigned and/or assignable, at least in their operating positions in relation to a direction orthogonal to the axial direction A, arranged offset and/or spaced apart from one another. In a preferred embodiment, four nozzle bars 213; 413 are arranged, each by means of a respective positioning device 217; 218; 219; 221 are arranged to be movable out of their printing position in a respective linear adjustment direction. Furthermore, four maintenance devices 222 embodied as cleaning devices 222 are preferably arranged and can be moved individually by means of respective feed devices 223 between the parked position and the use position. The respective Each of the feed devices 223 preferably has two rails 228 arranged on opposite sides of the frame 231 . The respective feed devices 223 preferably each have at least one feed drive 229 or two feed drives 229 arranged on opposite sides of the frame 231. The maintenance devices 222 are preferably arranged symmetrically about a plane of symmetry that defines the axis of rotation 207; 407 of the at least one printing material guide element 201; 401 completely contains. The four supply routes preferably run horizontally and at a total of two different heights. For example, the maintenance devices 222 are arranged higher than the rails 228 assigned to them.

The respective assembly positions of two and more preferably of all nozzle bars 213; 413 are arranged at the same height and are therefore at different distances from the corresponding printing positions. The respective maintenance positions of two nozzle bars 213; 413 are arranged at a first common height, which differs from a second common height at which the respective maintenance positions of the other two nozzle bars 213; 214 are arranged. These heights differ by at least five centimeters, for example. In this way, there is sufficient space for all maintenance devices 222 in their respective usage positions, since these usage positions differ in height and therefore no collision of the volumes required by the different maintenance devices 222 occurs.

A clear maintenance position is preferably assigned to the at least one print head 212 and more preferably to each print head 212. If the at least one maintenance device 222 is arranged in its operating position, it serves, for example, as a third locking element, for example in the form of at least one maintenance stop. When the print head 212 is in its maintenance position, the nozzle bar 213 having the corresponding print head 212 is preferably pulled and/or pressed against the maintenance device by the application of a force by means of the at least one positioning drive 226 and/or by gravity, in particular when the positioning drive 226 is switched off. This clearly defines the maintenance position. Alternatively and preferably, the respective positioning drive 226 has at least one stepper motor, by means of which clear positions of the respective maintenance device 222 can be controlled. In this way, one positioning drive 226 and one feed drive 229 are sufficient to be able to arrange the print heads 212 reproducibly and precisely in their printing positions, maintenance positions and assembly positions.

Each maintenance position of at least one print head 212 is preferably assigned a clear usage position of at least one and preferably exactly one maintenance device 222. For example, the at least one maintenance device 222 is embodied as at least one protective cover 222, more preferably by means of the together with the at least one print head 212; 412 a closed volume can be limited. The at least one maintenance device 222 is preferably additionally or alternatively embodied as at least one cleaning device 222. The at least one maintenance device 222 is preferably embodied as at least one inspection device 222.

For example, in a first exemplary embodiment, the at least one maintenance device 222 can be assigned at least two or at least three operating positions and/or at least one parking position, in which the respective maintenance device 222 and more preferably optionally different maintenance devices 222 are and/or can be arranged. Examples for a total of four nozzle bars 213 of a printing unit 200; 400, a total of two maintenance devices 222 are arranged, each of which has at least two areas that serve and/or can be used as a protective cover and that each have or have at least one area that serves as a cleaning area. The at least one cleaning area can then be assigned to the nozzle bar 213 to be cleaned in sequence, whereupon the nozzles of the respective nozzle bar 213 are cleaned. Once all the necessary cleaning processes have been completed, the at least one maintenance device 222 can be arranged in such a way that its two areas serving as protective covers are each assigned to a nozzle bar 213, which are then preferably placed on the shared maintenance device 222, with the respective positioning drives 226 being deactivated. For example, each area serving as protective covers can be assigned to different nozzle bars 213, so that it is possible to arrange individual nozzle bars 213 in the printing position while covering other nozzle bars and protecting them from drying out, for example.

However, each nozzle bar 213 is preferably assigned and/or can be assigned its own maintenance device 222 and/or each maintenance device 222 is assigned exactly one use position and exactly one parking position in which the respective maintenance device 222 is and/or can be arranged. For a total of four nozzle bars 213 of a printing unit 200; 400 total four maintenance devices 222 are arranged, which each have an area that serves and/or can be used as a protective cover 222 and that are each designed as cleaning devices 222. Once all the necessary cleaning processes have been completed, the at least one maintenance device 222 can be arranged in such a way that its areas serving as protective covers 222 are each assigned to a nozzle bar 213, which is then placed on the common maintenance device 222, for example by deactivating the respective positioning drives 226, or by shutting down the respective positioning drives 226 are held in their maintenance position. Cleaning preferably takes place, for example, while the respective maintenance device 222 is already serving as a protective cover 222 and/or a cleaning area and an area serving as a protective cover 222 are identical. For example, each maintenance device 222 serving as a protective cover 222 can be assigned to the respective nozzle bar 213, either independently of other maintenance devices 222, so that it is possible to arrange individual nozzle bars 213 in the printing position while covering other nozzle bars 213 and protecting them against drying out, for example.

The at least one maintenance device 222 is preferably embodied as at least one cleaning device 222. The at least one cleaning device 222 preferably has at least one cleaning module, in particular at least one by means of at least one cleaning drive in and/or counter to the axial direction A relative to the at least one print head 212; 412 movable cleaning module. The at least one cleaning module preferably has at least one contact element, which is connected to at least one nozzle surface of the at least one print head 212; 412 can be brought into contact, at least when the cleaning device 222 is arranged in its use position and the corresponding print head is arranged in its maintenance position. The at least one cleaning module preferably has at least one on the at least one print head 212; 412 and/or the first dispensing device for cleaning agents, which is aligned and/or can be aligned with the at least one contact element, for example at least one spray nozzle. The at least one contact element is preferably designed as at least one wiper.

When the at least one print head 212 is arranged in the printing position, at least one nozzle of this at least one print head 212 is preferably arranged below the supply path, along which the at least one maintenance device 222, preferably by means of the at least one feed device 223, preferably between the at least one parking position and the at least one operating position is movably arranged. When the at least one print head 212 is arranged in the rest position, this at least one nozzle is preferably arranged above this delivery path.

A travel path of at least one print head 212 is preferably a preferably predefined path along which the at least one print head 212 can be moved, in particular to move the at least one print head 212 between its printing position and its idle position, for example the maintenance position and/or assembly position. The travel of the at least one print head 212 preferably has no component in axial direction A that is greater than at most 50%, more preferably at most 20%, even more preferably 10%, and even more preferably at most 2% of that in axial direction A measured width of the working area of the nozzle bar 213 having the at least one print head 212 and/or no more than 50%, more preferably no more than 20%, even more preferably no more than 10% and even more preferably no more than 2% of the maximum printing substrate width that can be processed with printing press 01 Working width of printing press 01. This means that any component of the at least one print head 212 in the axial direction A that is preferably at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of the axial direction A measured width of the working area of the at least one Dr uckkopf 212 and/or no more than 50%, more preferably no more than 20%, even more preferably no more than 10% and even more preferably no more than 2% of the working width of the printing press 01 defined by the maximum width of printing material that can be processed with the printing press 01.

Preferably, at least one of the first of the at least two print heads 212, in particular of the first printing unit 200, can be arranged, preferably by means of a first positioning device 217 assigned to it, at least either in the first printing position assigned to it or in a first rest position assigned to it, in particular a maintenance position and/or assembly position, wherein in the at least one first rest position, a rest position of at least one first nozzle of the at least one first of the at least two print heads 212 has a first rest distance, in particular a maintenance distance and/or assembly distance from a first working position of the at least one first nozzle of the at least one first of the at least two print heads 212 in its first printing position. At least a second of the at least two print heads is preferred 212, in particular this first printing unit 200, preferably by means of a second positioning device 218 assigned to it, can be arranged at least either in a second printing position assigned to it or in a second rest position assigned to it, in particular a maintenance position and/or assembly position, with in the at least one second rest position a resting position of at least one second nozzle of the at least one second of the at least two print heads 212 has a second resting distance, in particular a maintenance distance and/or installation distance from a second working position of the same at least one second nozzle of the at least one second of the at least two print heads 212 in its second printing position. The first resting distance, in particular maintenance distance and/or assembly distance, preferably differs from the second resting distance, in particular maintenance distance and/or assembly distance, by at least 2 cm, more preferably at least 5 cm, even more preferably at least 10 cm and even more preferably at least 20 cm. In particular, a rest distance is a distance between a position of a nozzle when the print head 212 having this nozzle is arranged in its rest position and a position of the same nozzle when the same print head 212 is arranged in its printing position.

In particular, the at least one first print head 212 can preferably be arranged at least either in a first printing position assigned to it or in a first rest position assigned to it, in particular a first maintenance position and/or a first assembly position, by means of at least one first positioning device 217 assigned to it. In particular, the at least one second print head 212 can preferably be arranged at least either in a second printing position assigned to it or in a second rest position assigned to it, in particular a second maintenance position and/or second assembly position, by means of at least one second positioning device 218 assigned to it.

Printing press 01, and even more preferably each printing unit 200; 400 at least two positioning devices 217; 218; 219; 221, on each of which at least one of the at least two print heads 212; is assigned and by means of which the at least two print heads 212; 412 are each designed to be movable and can each be arranged optionally at least either in a respective printing position and/or at least one respective rest position, for example maintenance position and/or assembly position. More preferably, each printing unit 200; 400 at least four such positioning devices 217; 218; 219; 221 on.

A minimum distance, preferably referred to as a rest distance, in particular a maintenance distance and/or assembly distance, between the at least one first nozzle of the at least one first print head 212; 412 in its first rest position, in particular the maintenance position and/or assembly position, and the at least one second nozzle of the at least one second print head 212; 412 in its second rest position, in particular the maintenance position and/or assembly position, is at least 2 cm, more preferably at least 5 cm, even more preferably at least 10 cm and even more preferably at least 20 cm greater than a minimum distance, preferably referred to as the working distance, between at least the at least a first nozzle of the at least one first printhead 212; 412 in its first printing position and the at least one second nozzle of the at least one second print head 212; 412 in its second printing position.

For example, an ejection direction of at least one first nozzle of the at least one first print head 212; 412 in the first printing position differs from an ejection direction of this at least one first nozzle of the at least one print head 212; 412 in the first rest position, in particular maintenance position and/or installation position, by an angle of at least 5°, more preferably at least 10°, even more preferably at least 15° and even more preferably at least 20°. A position of the at least one nozzle when print head 212 is arranged in the at least one printing position and a position of the at least one nozzle when print head 212 is arranged in the at least one rest position, in particular the maintenance position and/or assembly position, differ in terms of the axis of rotation 207 of the at least one axial direction A defined for printing material guide element 201 by at most 50%, more preferably at most 20%, even more preferably at most 10% and even more preferably at most 2% of the width, measured in axial direction A, of the working area of the nozzle bar 213 having the at least one print head 212 and/or no more than 50%, more preferably no more than 20%, even more preferably no more than 10% and even more preferably no more than 2% of the working width of printing machine 01 defined by the maximum width of printing material that can be processed with printing machine 01. A plane in which this distance and/ or this angle is measured, defined by a surface normal which is parallel to the axial direction A or deviates from this axial direction A by at most 2°, more preferably this plane is the axial projection plane.

Preferably, this printing machine allows a method for positioning at least one than Ink jet print head 212 formed print head 212 of at least one printing unit 200; 400 of printing press 01, with at least one print head 212 of the at least one printing unit 200; 400 is moved in at least one positioning direction and/or along a positioning path from a printing position to at least one idle position, in particular a maintenance position and/or installation position, and/or is set aside by a provided transport path of the at least one printing substrate web 02 and/or is set aside by a printing substrate guide element 201 and/or is switched off by a transfer body, and this at least one positioning direction is preferably oriented at least partially and more preferably completely orthogonally to an axial direction A defined by the axis of rotation 207 of the at least one printing material guide element 201.

At least within a printing unit 200; 400 of printing press 01, at least at times, at least one webbing-up means that is movable along at least one webbing-up path for threading in a printing substrate web 02 and/or a webbing-up means that is movable along at least one provided transport path of printing substrate web 02 is and/or can be arranged for threading in a printing substrate web 02. In particular, as described, the at least one print head 212; 412 is designed to be movable along a positioning path in a positioning direction, with the positioning direction preferably having at least one component that is orthogonal to a axis of rotation 207; 407 of the at least one printing material guide element 201; 401 fixed axial direction A is oriented. Preferably, at least portions of the at least one webbing path, and more preferably all of the webbing path, has relative to the axial direction A relative to each target area of each nozzle of each printhead 212; 412 of this printing unit 200; 400 has a distance of at least 2 cm, more preferably at least 4 cm, even more preferably at least 6 cm and even more preferably at least 8 cm. Preferably, at least parts of the webbing-up means, and more preferably all of the webbing-up means, have relative to the axial direction A relative to each target area of each nozzle of each printhead 212; 412 of this printing unit 200; 400 has a distance of at least 2 cm, more preferably at least 4 cm, even more preferably at least 6 cm and even more preferably at least 8 cm.

In particular, the at least one webbing-up path and/or the at least one webbing-up means is preferably arranged with respect to axial direction A outside the working area of a nozzle bar 213 having the at least one print head 212 and/or outside a working width of printing press 01. The adjustment direction of the at least one print head 212 preferably has at least one component in a direction of a normal vector of the at least one print head 212; 412 next surface element of the intended transport path of printing substrate web 02. This means that the at least one print head 212 is arranged such that it can be moved or set aside away from the intended transport path, in particular for feeding a printing substrate web 02 into the printing press 01 and/or in particular by means of at least one positioning device 217; 218; 219; 221. Printing press 01 preferably has at least one, and more preferably exactly one, webbing-up means for webbing-up a printing substrate web 02 along a designated transport path of the printing substrate web 02, at least temporarily and more preferably permanently.

Preferably, at least one printing substrate web 02 is and/or can be connected to the at least one webbing-up means via at least one connecting element, more preferably embodied as at least one webbing-up tip, in particular independently of the configuration of the at least one webbing-up means as a webbing-up belt and/or webbing-up chain and/or endless webbing-up means and/or or finite retractant. A webbing tip is preferably a flat means whose smallest dimension is preferably less than 5 mm and which preferably has an essentially triangular shape and on whose one edge an adhesive and/or adhesive is preferably provided and which is preferably on a tip opposite this edge at least has a fastener. The adhesive and/or bonding agent is preferably used to connect the webbing tip to a printing substrate 02. The at least one fastening means is preferably used to detachably attach the webbing tip to the at least one webbing means.

The at least one webbing-up means is preferably designed as at least one endless webbing-up means, for example as at least one endless webbing-up tape. The at least one webbing-up means is alternatively designed as at least one finite webbing-up means, for example as a finite webbing-up tape and/or as a finite webbing-up chain. A finite webbing tape is preferably rewound after a webbing-up process, ie it is moved in the opposite direction along the webbing-up path. At least one webbing-up drive is preferably arranged, by means of which the at least one webbing-up means is arranged to be movable along the at least one webbing-up path. For example, in the case of an endless webbing-up means, it is sufficient if exactly one such webbing-up drive is arranged. Alternatively, the at least one webbing-up means is finite. At least one webbing-up store is then preferably arranged, in which the at least one webbing-up means can be arranged at least temporarily, in particular provided that it is not being used to draw in a printing substrate web 02. In an alternative embodiment, the at least one webbing-up means is designed as at least one finite webbing-up chain. In the preferred case of the at least one endless webbing-up means, the at least one webbing-up means for webbing-up a printing substrate web 02 is preferably arranged along the intended transport path of the printing substrate web 02, in particular permanently along its at least one webbing-up path within printing machine 01. More particularly preferred is the at least one webbing-up means for webbing-up a printing substrate web 02 along the intended transport path of the printing substrate web 02 permanently along its at least one webbing-up path within the at least one printing unit 200; 400 of the printing press 01.

At least one webbing-up guide element is preferably arranged, by means of which at least one webbing-up path of the at least one webbing-up means can be and/or is fixed. The at least one pull-in guide element is designed, for example, as at least one deflection roller. The at least one pull-in guide element is alternatively designed as at least one chain rail. The at least one webbing-up guide element is preferably designed as at least one rotatable webbing-up guide element, for example as at least one deflection roller. The at least one webbing-up guide element, and in particular the at least one deflection roller, is preferably rotatable about the same axis of rotation 207; 407 arranged such that it can rotate, such as at least one printing material guide element 201; 401 of a printing unit 200; 400 of printing press 01, for example like the at least one central cylinder 201; 401. A chain rail in particular can also have points for realizing different pulling-in paths.

The at least one preferably endless webbing-up means preferably has at least two and more preferably at least five connection points provided, at which at least one printing substrate web 02 can be connected directly and/or via at least one connecting element, for example a webbing-up tip, to the at least one webbing-up means. The at least two and more preferably at least five connection points are preferably at a distance of no more than 10 cm (ten centimeters), more preferably no more than 5 cm (five centimeters), even more preferably no more than 2 cm (two centimeters) and more in relation to the axial direction A more preferably no distance at all. Even more preferably, the at least two and more preferably at least five connection points are arranged at the same position in relation to the axial direction A. The at least two and more preferably at least five connection points are preferably spaced apart from one another along the at least one and preferably exactly one webbing-up path, more preferably by at least 10 cm (ten centimeters), even more preferably by at least 50 cm (fifty centimeters) and even more preferably by at least 100 cm (one hundred centimetres). For example, the at least one webbing-up means has connection points designed as eyelets and/or hooks and/or the at least one connection element accordingly has at least one hook and/or at least one eyelet. Such a hook and/or such an eyelet forms, for example, the at least one fastening means.

The webbing-up path of the at least one webbing-up means preferably encloses the at least one, more preferably as at least one, central cylinder 201; 401 formed rotatable printing material guide element 201; 401 from a rotation axis 207; 407 of the at least one printing material guide element 201; 401 viewed from and/or viewed in the axial projection plane in an angular range of at least 180° and more preferably at least 270°. The webbing-up path of the at least one webbing-up means preferably has a radius of curvature, at least along this angular range, which is at most 5 cm, more preferably at most 2 cm and even more preferably at most 1 cm from a radius of curvature of this at least one printing material guide element 201; 401, in particular this central cylinder 201; 401 differs.

A projection, in particular in the axial projection plane, of the transport path provided for printing substrate 02 in the axial direction A and a projection, in particular in the axial projection plane, of the threading path provided for the at least one webbing-up means in the axial direction A preferably overlap at least partially, more preferably over 25% of a length of the projection of the webbing-up path intended for the webbing-up means, and even more preferably over 50% of that length.

This printing press preferably allows a method for threading at least one printing substrate web 02 into at least one printing unit 200; 400 of printing machine 01, with at least one print head 212 embodied as an inkjet print head 212 of the at least one printing unit 200; 400 in at least one adjustment direction and/or along an adjustment path from a provided transport path of the at least one printing substrate web 02, and this at least one adjustment direction is preferably at least partially and more preferably completely orthogonal to an axial direction defined by the axis of rotation 207 of the at least one printing substrate guide element 201 A is oriented and then in a drawing process at least one A pulling means along a threading path through the at least one printing unit 200; 400 and in doing so pulls the at least one printing substrate web 02 along a transport path provided for the at least one printing substrate web 02 and wherein the webbing-up path and the transport path are spaced apart from one another, viewed in the axial direction A, more preferably by at least 2 cm, even more preferably by at least 4 cm, more preferably at least 6 cm and even more preferably at least 8 cm. In order to thread in the at least one printing substrate web 02, it is not necessary to move the at least one print head 212 into its maintenance position and/or installation position during the shutdown process. It is sufficient if there is a sufficiently large distance from printing substrate 02 and/or from the connecting element in order to protect the at least one print head 212 from damage. Then, in a positioning process, the at least one print head 212 is preferably positioned against the at least one positioning direction and/or along a positioning path on the intended transport path of the at least one printing substrate web 02 and/or positioned in its printing position.

The at least one webbing-up means is preferably connected to the at least one printing substrate web 02 in a connecting process, in particular before the webbing-up process, by means of at least one connecting element. The at least one webbing-up means is preferably connected to the at least one webbing-up means in the connection process by means of the at least one connecting element at precisely one of the at least two, more preferably at least five, connection points provided on the at least one webbing-up means. The at least one connecting element preferably passes through a printing position of the at least one print head 212 while it is placed away from the intended transport path and/or in at least one rest position. During the webbing-up process, the at least one connecting element preferably passes through at least one target area of at least one nozzle of the at least one print head 212. During the webbing-up process, preferably none of the components of the at least one webbing-up means even pass through a target area of a nozzle of the at least one print head 212. This means that preferably all of the components of the at least one webbing bypasses any target area of any nozzles of the at least one printhead 212.

This results in at least one operating state in which the at least one webbing-up means is connected to printing substrate 02 by means of the at least one connecting element and in which the at least one print head 212 is set aside from the intended transport path and/or is in at least one idle position and in which it is preferred at least one nozzle is aligned with its ejection direction on the at least one connecting element. In the at least one operating state, the at least one connecting element is preferably in contact with the at least one printing material guide element 201, in particular with the at least one central cylinder 201. Alternatively or additionally, in the at least one operating state, the at least one connecting element is preferably in contact with at least one transmission body. In this operating state, the at least one webbing-up means preferably has, with respect to the axial direction A, relative to each target area of each nozzle of each print head 212; 412 of this printing unit 200; 400 has a distance of at least 2 cm, more preferably at least 4 cm, even more preferably at least 6 cm and even more preferably at least 8 cm.

At least one webbing-up means is preferably provided, which is located on only one side of the intended transport path for printing substrate 02 in relation to axial direction A and/or the webbing-up path of which runs only on one side of the intended transport path for printing substrate 02. At least one webbing-up means is preferably used, which is located on only one side of the intended transport path for printing substrate 02 in relation to axial direction A and/or the webbing-up path of which runs only on one side of the intended transport path for printing substrate 02.

After the printing substrate web 02 has passed the at least one first printing unit 200, the printing substrate web 02 is transported further along its transport path and preferably fed to the at least one first dryer 301 of the at least one dryer unit 300. The first side of the printing substrate web 02 that is printed on by the at least one first printing unit 200 preferably stands between a last point of contact between the printing substrate web 02 and the at least one first central cylinder 201 of the at least one first printing unit 200 and an area of action of the at least one first dryer 301 with no part of the Web press 01 in contact. The second side of the printing substrate web 02, in particular the one not printed on by the first printing unit 200, that touches the at least one first central cylinder 201 of the at least one first printing unit 200 is preferably located between the last point of contact between the printing substrate web 02 and the first central cylinder 201 of the at least one first printing unit 200 and in the effective area of the at least one first dryer 301 with at least one deflection roller 214 of the at least one first printing unit 200 and/or with at least one deflection roller 312 of the at least one first dryer 301. At least one is preferred third measuring device 214, preferably embodied as a third measuring roller 214. This third measuring device 214 is used to measure the web tension. More preferably, the at least one deflection roller 214 of the first printing unit 200 is identical to the third measuring device 214 embodied as the third measuring roller 214.

The at least one first dryer 301 is preferably embodied as an infrared radiation dryer 301. The at least one first dryer 301 preferably has at least one radiation source 302, which is preferably embodied as an infrared radiation source 302. A radiation source 302, preferably infrared radiation source 302, is a device by means of which electrical energy is and/or can be converted in a targeted manner into radiation, preferably infrared radiation, and is and/or can be directed onto printing substrate web 02. The at least one radiation source 302 preferably has a defined effective area. In particular, the effective area of a radiation source 302 is the area that contains all points that can be connected to the radiation source 302 in a straight line, in particular without interruption, directly or via reflectors. The effective area of the at least one first dryer 301 is made up of the effective areas of all radiation sources 302 of the at least one first dryer 301. The effective area of the at least one first dryer 301 preferably points from the at least one radiation source 302 to a part of the transport path of the printing substrate web 02 that is closest to the at least one radiation source 302. Air is introduced into the interior of the at least one first dryer 301 through at least one ventilation opening. Inside the first dryer 301, water and/or solvent for the printing inks to be removed from the printing substrate web 02 is removed by the infrared radiation and absorbed by the introduced air. This air is then removed from the at least one first dryer 301 through at least one ventilation opening.

In a preferred embodiment, the transport path provided for printing substrate 02 through the at least one first dryer 301 has at least two sections, each running in directions with vertical components, more preferably with larger vertical components than any horizontal components that may be present. The intended transport path of the printing material preferably runs along the one section at least with a component in the vertical direction upwards. The intended transport path of the printing material preferably runs downwards along the other section, at least with a component in the vertical direction. The one section and the other section of the provided transport path are preferably connected to one another by at least one provided connection piece of the provided transport path. The at least one connecting piece preferably runs in a direction with a horizontal component, more preferably with a larger horizontal component than any vertical component that may be present. As a result, the at least one dryer 301 can preferably be constructed in a particularly compact manner.

At least one first cooling device 303 is preferably located downstream of the area of action of the at least one radiation source 302 of the at least one first dryer 301 in the transport direction of printing substrate web 02. The at least one first cooling device 303 preferably has at least one first cooling roller 304 and preferably a first cooling roller impression roller 306 that can be and/or is positioned against the at least one first cooling roller 304, and preferably at least one deflection roller that can and/or is positioned against the at least one first cooling roller 304 307; 308 on. A first drive motor 311, embodied as a first cooling roller drive motor 311, assigned to the at least one first cooling roller 304, and the first cooling roller impression roller 306 are preferably part of a web tension controller, i.e. arranged to control the web tension, and are preferably connected at least partially and/or temporarily to the higher-level machine controller for this purpose. The at least one first cooling roller 304 preferably represents at least one fourth motor-driven rotary body 304. The printing substrate web 02 wraps around and preferably touches the at least one first cooling roller 304 along its transport path with a wrap angle of preferably at least 180° and more preferably at least 270°. The first chill roller impression roller 306, together with the at least one first chill roller 304, preferably forms a first chill nip 309, in which the printing substrate web 02 is preferably located and/or through which the printing substrate web 02 preferably passes. The printing substrate web 02 is pressed against the at least one first cooling roller 304 by the cooling roller impression device 306. The at least one first cooling roller 304 of the at least one first cooling device 303 is preferably embodied as a cooling roller 304 through which a coolant flows.

At least one second printing unit 400 is preferably arranged along the transport path of printing substrate web 02 after the at least one first cooling device 303. At least one second web edge aligner, which is preferably manual or driven, is preferably located along the transport path of printing substrate web 02, preferably directly upstream of the at least one second printing unit 400 and preferably downstream of the at least one first dryer 301 and in particular downstream of the at least one first printing unit 200 is designed to be controllable and/or adjustable. The at least one second printing unit 400 is constructed analogously to the first printing unit 200. In particular, the second printing unit 400 has a second central printing cylinder 401, or central cylinder 401 for short, around which the printing substrate web 02 wraps itself during printing, also with an angle of wrap of preferably at least 180° and more preferably at least 270°. The second central cylinder 401 preferably represents a fifth motor-driven rotary body 401. The second central cylinder 401 of the second printing unit 400 preferably has a direction of rotation that is opposite to a direction of rotation of the at least one first central cylinder 201. A second printing substrate cleaning device 402 or web cleaning device 402 acting on the printing substrate web 02 is preferably arranged along the transport path of the printing substrate web 02 upstream of the second central cylinder 401 of the second printing unit 400.

The transport path of the printing substrate web 02 through the at least one second printing unit 400 runs analogously to the transport path through the at least one first printing unit 200. In particular, the printing substrate web 02 preferably wraps around part of a second deflection roller 403 and is deflected by it in such a way that the transport path of the printing substrate web 02 in the second intermediate space 404 runs both tangentially to the second deflection roller 403 and tangentially to the second central cylinder 401. At least one cylinder 406 embodied as a second impression roller 406 is preferably arranged in the second printing unit 400. The second impression roller 406 is preferably constructed and arranged analogously to the first impression roller 206, in particular with regard to its mobility and a second impression roller gap 409. The second central cylinder 401 is preferably arranged and structured analogously to the first central cylinder 201, in particular with regard to a second drive motor 408 of the second Central cylinder 401 and a corresponding preferably arranged second rotation angle sensor, which measures and/or is capable of measuring a rotation angle position of the second drive motor 408 and/or the second central cylinder 401 itself and is and/or capable of transmitting to the higher-level machine controller.

At least one second printing unit 411, embodied as an inkjet printing unit 411 or inkjet printing unit 411, is preferably arranged within the second printing unit 400, aligned in the direction of rotation of the second central cylinder 401 and thus along the transport path of the printing substrate web 02 after the second impression roller 406 on the second central cylinder 401 . The at least one second printing unit 411 of the at least one second printing unit 400 is preferably identical to the at least one first printing unit 211 of the at least one first printing unit 200, in particular with regard to at least one nozzle bar 413, at least one print head 412 embodied as an inkjet print head 412, and their arrangement in double rows , the execution and resolution of the printing process, the arrangement, alignment, and control of the nozzles, and the mobility and adjustability of the at least one nozzle bar 413 and the at least one print head 412 using at least one adjustment mechanism with a corresponding electric motor. An analogous protective cover and/or cleaning device is also preferably arranged. Correct alignment of the print heads 412 of the at least one second printing unit 400 is preferably checked in that at least one sensor detects a printed print image and the machine controller evaluates this print image. This at least one sensor is preferably at least one second printed image sensor, which is designed analogously to the at least one first printed image sensor. The at least one second printing unit 411 is preferably embodied as a four-color printing unit 411.

At least one second dryer 331 is located downstream of the at least one second printing unit 400 with respect to the transport path for printing substrate web 02. After the printing substrate web 02 has passed the at least one second printing unit 400, the printing substrate web 02 is transported further along its transport path and is preferably fed to the at least one second dryer 331 of the at least one dryer unit 300. The at least one second dryer 331 is preferably constructed analogously to the at least one first dryer 301. The at least one first dryer 301 and the at least one second dryer 331 are components of the at least one dryer unit 300. The second side of the printing substrate web 02 that is printed on by the at least one second printing unit 400 is preferably located between a last point of contact between the printing substrate web 02 and the second central cylinder 401 the at least one second printing unit 400 and an area of action of the at least one second dryer 301 is not in contact with any part of web-fed printing press 01. At least one deflection roller 414 of the second printing unit 400 is preferably provided. This at least one deflection roller 414 is preferably embodied as a fifth measuring device 414, in particular a fifth measuring roller 414.

The structure of the at least one second dryer 331 is identical to the structure of the at least one first dryer 301, in particular with regard to a transport path provided for the printing material and/or a design as a flow dryer 331 and/or radiation dryer 331 and/or hot air dryer 331 and/or infrared radiation dryer 331 and/or UV radiation dryer 331. In particular, the at least one second dryer 331 preferably has at least one second cooling roller 334, which more preferably represents at least one sixth motor-driven rotary body 334. The second cooling roller 334 is and/or can be driven by means of a second cooling roller drive 341. The at least one second dryer 331 is preferably constructed essentially and more preferably completely symmetrically to the at least one first dryer 301 with respect to the described components. The at least one second dryer 331 is preferably part of the same dryer unit 300 as the at least one first dryer 301 and is more preferably arranged in the same housing 329. In terms of spatial arrangement, dryer unit 300 and thus preferably the at least one first dryer 301 and the at least one second dryer 331 are preferably arranged between the at least one first printing unit 200 and the at least one second printing unit 400.

At least one outfeed roller 501 is arranged along the transport path for printing substrate web 02 after the at least one second dryer 331. The at least one outfeed roller 501 preferably has its own drive motor 504 embodied as outfeed roller drive 504. The at least one pull-out roller 504 preferably represents at least one seventh motor-driven rotary body 504. The at least one pull-out roller 501, together with a pull-out pressure roller 502 that is and/or can be thrown onto the at least one pull-out roller 501, preferably forms a pull-out gap 503 in which printing substrate web 02 is clamped and through which the printing material web 02 is conveyed. Outfeed gap 503 is preferably used to regulate web tension and/or to transport printing substrate web 02.

With regard to the transport path of printing substrate web 02 before and/or after outfeed roller 501, but in particular along the transport path of printing substrate 02 after the at least one first dryer 301, at least one remoisturizing device is preferably provided, which preferably prevents excessive moisture loss from printing substrate web 02 due to the treatment by the dryer unit 300 compensates.

At least one post-processing device 500, which is preferably embodied as a folding device 500 and/or has a sheet cutter 500 and/or a sheet delivery device 500, or is embodied as a winding device 500, is arranged along the transport path of printing substrate web 02 downstream of outfeed nip 503 and/or downstream of the remoistening device. Printing substrate web 02 is preferably folded and/or cut and/or stapled and/or sorted and/or enveloped and/or dispatched and/or wound up in and/or by this post-processing device 500.

In at least one variant of the printing press, the printing press 01 is embodied as a web-fed rotary inkjet printing press 01 and at least one transfer body is arranged with the at least one first central printing cylinder 201 to form a transfer nip. The at least one print head 212 is then preferably aligned with the at least one transfer body.

Reference List

01

Printing press, inkjet printing press, web-fed printing press, web-fed inkjet printing press, rotary printing press, web-fed rotary printing press, web-fed rotary inkjet printing press

02

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

100

Substrate source, roll unwind device, roll changer

101

substrate roll

102

-

103

Roll holding device, clamping device, clamping mandrel, clamping cone, clamping device, mandrel, clamping cone, clamping shaft; Body of revolution, first

104

drive motor, electric motor (103)

107

Support arm (101)

108

Axle, carrier, supporting frame (107)

109

Pivoting axis (108)

110

-

111

axis of rotation (101; 103)

112

frame

113

dancer roll

114

Edge aligner, first

115

-

116

alignment roller

117

tension jack

118

pull roller; body of revolution, second

119

infeed gap

120

-

121

dancer lever

139

infeed mechanism

140

-

141

Measuring roller, infeed measuring roller, measuring device, first

146

drive motor, train drive motor (118)

200

pressure unit, first

201

Printing material guide element, printing central cylinder, central cylinder, first; body of revolution, third

202

Printing material preparation device, web preparation device, coating device, corona device, discharge device, printing material cleaning device, web cleaning device, dedusting device, first

203

Roller, deflection roller, printing material guide element

204

space (201; 203)

205

-

206

Cylinder, impression roller, first

207

axis of rotation (201)

208

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

209

Presser column, first

210

-

211

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

212

Printhead, inkjet printhead, first

213

Nozzle bar, first

214

Deflection roller, measuring roller, measuring device, third, printing material guide element

215

-

216

measuring roller, measuring device, second

217

Positioning device, first

218

positioning device, second

219

positioning device, third

220

-

221

positioning device, fourth

222

Maintenance device, cleaning device, inspection device

223

Feeding device, guiding system

224

Positioning guide, lever arm, rail

225

-

226

Positioning drive, electric motor, stepper motor, hydraulic cylinder, pneumatic cylinder

227

Pivoting axis (212; 213; 217; 218; 219; 221)

228

Traction means, push means, chain, rail, toothed rack

229

Feed drive, stepper motor

230

-

231

Frame (200; 400)

251

supply system, printing ink supply system

252

normal stock

253

Liquid line, paint line, first

254

supply line

255

-

256

derivation

257

cache

258

overflow drain

259

filter device

260

-

261

degassing device

262

Valve, check valve, first

263

valve, check valve, second

264

liquid pump, first

265

-

266

Gas room, first

267

Gas line, first

268

Vacuum source, gas pump, first

269

Gas room, second

270

-

271

Gas line, second

272

buffer storage

273

supply line, suction line

274

reservoir

275

-

276

Vacuum source, vacuum buffer

277

Vacuum source, vacuum regulator

278

vacuum supply line

279

degassing line

280

return valve

281

vacuum line

282

normal pressure line

283

pressure regulator

284

Compressed air source, air pump, atmosphere connection

285

return pump

286

compensation line

287

overflow

288

supply line

289

storage pump

290

Gas room, third

291

reservoir valve

292

supply air filter

293

Liquid trap, coating agent trap

294

vacuum sensor

295

return memory

296

supply pump

297

flow meter

298

Supply valve, local

299

damping device

300

dryer unit

301

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

302

Radiation source, infrared radiation source

303

Cooling device, first

304

chill roll, first; body of revolution, fourth

305

-

306

chill roll pressur

307

Guide roller, first

308

Guide roller, second

309

Chill nip, first

310

-

311

Drive motor, chill roll drive motor (304), first

312

Deflection roller, substrate guide element

329

housing (300)

330

-

331

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

332

-

333

cooling device, second

334

chill roll, second; body of revolution, sixth

335

-

336

Chill roll pressur, second

339

Chill nip, second

340

-

341

Drive motor, chill roll drive motor (334), second

342

-

343

measuring roller, measuring device, sixth

400

pressure unit, second

401

Printing material guide element, printing central cylinder, central cylinder, second; body of revolution, fifth

402

Printing material cleaning device, web cleaning device, dust removal device, second

403

Roller, deflection roller, printing material guide element

404

space (401; 403)

405

-

406

Cylinder, impression roller, second

407

axis of rotation (401)

408

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

409

Presser gap, second

410

-

411

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

412

printhead, inkjet printhead, second

413

Nozzle bar, second

414

Deflection roller, measuring roller, fifth, printing material guide element

415

-

416

measuring roller, measuring device, fourth

500

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

501

Outfeed roller, rotary body, seventh

502

extruder

503

pull-out gap

504

Drive motor, outfeed roller drive (501)

A

direction, axial

Claims (12)

Printing press (01), wherein the printing press (01) has at least one printing unit (200; 400), which has at least two print heads (412, 212) and at least one axis of rotation (207; 407) that can be rotated about an axis of rotation (207; 407) that defines an axial direction (A). printing material guide element (201; 401) and wherein each of the at least two print heads (212; 412) is arranged to be movable along a respective linear adjustment path by means of a respective positioning device (217; 218; 219; 221) assigned at least to this print head (212; 4 12). and wherein the linear adjustment paths point in respective adjustment directions, which differ in pairs by at least 10° and at most 150°, and wherein each of the at least two print heads (212; 412) can optionally be at least at least can be arranged either in a printing position assigned to it or at least in a maintenance position assigned to it, and in the at least one maintenance position of a first print kheads (212; 412) of the at least two print heads (212; 412), at least one maintenance device (222) is and/or can be assigned to at least one first nozzle of this at least one first print head (212; 412), and the at least one maintenance device (222) by means of at least one feed device (223) is arranged to be movable along at least one supply path between at least one parking position and at least one use position exclusively orthogonally to the axial direction (A), and wherein the maintenance device (222) is designed as at least one cleaning device (222) and the at least one cleaning device (222 ) has at least one cleaning module (150) that can be moved in and/or counter to the axial direction (A) relative to the at least one print head (212; 412), characterized in that the respective supply path runs linearly and in a direction that extends from a horizontal direction by a maximum of 10° and that at least one e cleaning module (150) at least one on the at least one print head (212; 412) aligned and/or alignable first dispensing device for cleaning agents. printing press claim 1 , characterized in that the at least one printing unit (200; 400) has at least four print heads (412, 212) and that each of the at least four print heads (212; 412) is positioned by means of a respective positioning device assigned to at least this print head (212; 4 12). (217; 218; 219; 221) is arranged to be movable along a respective linear adjustment path. printing press claim 1 and/or 2, characterized in that when the first print head (212; 412) is in its maintenance position, a rest position of the at least one first nozzle of the at least one first of the at least two print heads (212; 412) is a first maintenance interval from a working position of the same at least one first nozzle of the same has at least a first of the at least two print heads (212; 412) in its first printing position and that in relation to a second print head (212; 412) of the at least two print heads (212; 412) when the second print head (212 ; 412) a rest position of at least one second nozzle of the at least one print head (212; 412) has a second maintenance interval from a working position of the same at least one second nozzle of the same at least one second print head (212; 412) in its second printing position and that the first maintenance interval differs from the second maintenance distance by at least 2 cm. printing press claim 1 and/or 2 and/or 3, characterized in that the adjustment directions of the linear adjustment paths are each aligned orthogonally to the axis of rotation (207; 407) of the at least one rotatable printing material guide element (201; 401). printing press claim 1 and/or 2 and/or 3 and/or 4, characterized in that the respective maintenance device (222) in its respective use position is associated with the respective at least one nozzle of the respective print head (212; 412) in its maintenance position. printing press claim 1 and/or 2 and/or 3 and/or 4 and/or 5, characterized in that the at least one printing unit (200; 400) has at least two nozzle bars (213; 413), each of which has at least two print heads (212; 412) and that the at least two nozzle bars (213; 413) are arranged to be movable along a respective linear adjustment path by means of a respective positioning device (217; 218; 219; 221). printing press claim 1 and/or 2 and/or 3 and/or 4 and/or 5 and/or 6, characterized in that in the at least one first maintenance position at least one first maintenance device (222) is located between the at least one first nozzle of the at least one first print head ( 212; 412) and a region of the transport path provided for the printing material (02) that is closest to this at least one first nozzle and/or that in the at least one first maintenance position at least one first maintenance device (222) is located between the at least one first Nozzle of the at least one first print head (212; 412) and an area of a transfer body closest to this at least one first nozzle can be and/or is arranged. printing press 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 printing material guide element (201; 401) is arranged within the at least one printing unit (200; 400). and/or that the at least one printing material guide element (201; 401) acts as at least one web guide roller and/or a deflection roller (203; 214; 312; 403; 414) and/or as at least one central printing cylinder (201; 401) and/or as at least a transmission body is formed. printing press 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 when the first print head (212; 412) is arranged in the printing position, at least one nozzle of this at least a first print head (212; 412) is arranged below the supply path, along which the at least one maintenance device (222) is arranged movably and that in the rest position of this at least one first print head (212; 412) this at least one nozzle is arranged above this supply path . printing press 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 at least two maintenance devices (222), the different ones of the at least two print heads (212; 412) are and/or can be assigned are arranged at least partially one above the other in their respective parking positions. printing press 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 and/or 10, characterized in that an optionally present component of the provision path of the at least one maintenance device (222) in the axial direction (A) at most 50% of a width, measured in the axial direction (A), of a working area of a nozzle bar (213) having the at least one print head (212) and/or at most 50% of a maximum with the working width of the printing press (01) that is specified for the printing material that can be processed by the printing press (01). printing press 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 and/or 10 and/or 11, characterized in that at least within one printing unit ( 200; 400) at least at times at least one webbing-up means that is movable along at least one webbing-up path is and/or can be arranged for webbing in a printing substrate web (02) and that the at least one print head (212; 412) is designed to be movable along a positioning path in one positioning direction and that the adjustment direction has at least one component which is oriented orthogonally to an axial direction (A) defined by the axis of rotation (207; 407) of the at least one printing material guide element (201; 401) and that at least parts of the at least one webbing-up path are based on the axial direction (A) has a distance of at least 2 cm in relation to each target area of each nozzle of each print head (212; 412) of this printing unit (200; 400).

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