DE102013208748B4 - printing press - Google Patents

Abstract

Printing machine (01), wherein the printing machine (01) has at least one printing unit (200; 400), wherein at least one printing couple (211) is arranged inside the printing unit (200) and wherein the at least one printing unit (200; 400) has at least two than Inkjet printheads (212; 412) and wherein at least a first of the at least two printheads (212; 412) can be positioned in each case by means of a positioning device (217; 218; 219; 221) assigned to it, optionally at least either in one can be arranged in the first printing position or can be arranged in a first rest position assigned to it and designed as a maintenance position, in which a rest position of at least one first nozzle of the at least one first of the at least two print heads (212; 412) is a first rest distance from a working position of the 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 wherein at least a second of the at least two printheads (212; 412) can be arranged at least either in a second printing position assigned to it or can be arranged in a second rest position assigned to it, in which a rest position of at least one second nozzle of the at least one second of the at least two print heads (212; 412) is a second rest distance from a working position of the same has at least one second nozzle of the same at least one second of the at least two print heads (212; 412) in its second printing position and wherein at least four positioning devices (217; 218; 219; 221) are arranged, by means of which at least one nozzle bar (213) and /or a plurality of print heads (212) assigned to the same printing color are designed to be movable together and by means of which the print heads (212) can each be arranged optionally in a respective printing position and/or at least one respective maintenance position and wherein the at least one printing unit (200; 400 ) at least one as a printing center cylinder (201; 410) has a printing material guide element (201; 401) that is designed to be rotatable about an axis of rotation (207; 407) and wherein an axial direction (A) extends parallel to the axis of rotation (207; 407) of the at least one printing material guide element (201; 401), characterized in that characterized in that the printing unit (211) has a plurality of nozzle bars (213), each of which has a plurality of print heads (212), and that the at least four positioning devices (217; 218; 219; 221) each have a positioning drive (226) per movable nozzle bar (213) and that the printing press (01) is designed as a web-fed printing press (01) and that in the printing position of the at least one print head (212; 412) at least one nozzle of this at least one print head (212; 412) is arranged below a supply path, along to which at least one maintenance device (222) can be moved by means of at least one feed device (223) between at least one parking position and at least one use position is arranged and in the rest position of this at least one print head (212; 412) this at least one nozzle is arranged above this supply path and that an intended position of the at least one maintenance device (222) in its parked position in relation to the axial direction (A) differs from an intended position of the at least one in relation to the axial direction (A). Maintenance device (222) in its operating position by at most 50% of a width, measured in the axial direction (A), of a working area of a nozzle bar (213; 413) having the at least one print head (212; 412) and/or at most 50% of a maximum the working width of the printing press (01) that can be processed with the printing press (01) and that the first resting distance differs from the second resting distance by at least 2 cm.

Description

The invention relates to a printing machine.

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 printed 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 machine 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 a threading-in means for threading web-shaped printing material into a printing press is known.

through the DE 10 2005 060 786 A1 a printing machine is known 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 and the standard supply is connected to a buffer store via a supply line and a discharge line.

through the U.S. 2005 024 421 A1 and the U.S. 7,455,401 B2 a printing machine is known in each case, which has a printing unit with at least two inkjet print heads and a central printing cylinder, wherein a first of the print heads can be arranged by means of a positioning device assigned to it either in a first printing position assigned to it or in a first maintenance position assigned to it, in which a rest position a first nozzle of the at least one first print head has a first resting distance from a working position of the same nozzle of the same print head in its first printing position and the same applies analogously to a second print head and a second resting distance and wherein in the printing position of the at least one print head at least one nozzle is below one Provision path of a maintenance device is arranged and wherein in the rest position of this at least one print head this nozzle is arranged above this provision path and wherein a reference to the axial direction before seen position of the at least one maintenance device in its parking position does not differ from a reference to the axial direction intended position of the maintenance device in its use position.

through the DE 23 49 453 A1 a printing machine is known that has a printing unit that has at least two inkjet print heads, wherein at least a first of the print heads can be arranged in different positions by means of a positioning device assigned to it, and wherein the at least one printing unit has at least one printing material guide element designed as a central printing cylinder and rotatable about an axis of rotation having.

through the U.S. 8,262,198 B2 discloses a printing machine that has a printing unit that has at least two inkjet print heads, wherein the print heads can be arranged in different positions relative to one another by means of a positioning device, and wherein the printing unit has a central printing cylinder whose axis of rotation defines an axial direction.

through the U.S. 2009/0284566 A1 a printing press is known which has a printing unit which has at least four print heads designed as inkjet print heads and movable by means of four positioning devices, wherein a first print head can be arranged by means of its positioning device either in a first printing position assigned to it or in a first idle position assigned to it, designed as a maintenance position , in which 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 from a working position of the same at least one first nozzle of the same at least one first of the at least two print heads in its first printing position and the corresponding analogous for a second print head and a second rest distance applies and wherein the at least one printing unit has at least one printing material guide element designed as a central printing cylinder and rotatable about an axis of rotation, and wherein an axial Ric tion extends parallel to the axis of rotation of the at least one printing material guide element.

The invention is based on the object of creating a particularly space-saving printing machine that is compact and yet easily accessible and by means of which printed products can be reliably produced in long runs.

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

A printing press preferably has at least one printing unit, wherein the at least one printing unit preferably has at least one print head configured as an inkjet print head and at least one printing material guide element that can be rotated about an axis of rotation, and wherein the at least one print head can preferably be arranged in at least one idle position, preferably configured 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.

The printing press is preferably characterized in that a position of this at least one nozzle in the at least one printing position and a position of this at least one nozzle in the at least one maintenance position are at most 50% related to an axial direction defined by the axis of rotation of the at least one printing material guide element. a width, measured in the axial direction, of a working area of a nozzle bar having the at least one print head and/or at most 50% of a working width of the printing press defined 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 the at least one maintenance position, 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 arranged at least partially opposite the at least one nozzle with respect to a respective ejection direction /or arrangeable.

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 with the print head having this nozzle arranged in its rest position and a position of the same nozzle with the same print head 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.

The printing press is preferably characterized in that a minimum distance, preferably referred to as the rest distance, in particular maintenance distance and/or assembly distance, between the at least one first nozzle of the at least one first print head in its first rest position, in particular maintenance position and/or assembly position, and the at least one second nozzle of the at least one second print head 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 distance that is preferably referred to as the working distance minimum 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 print heads are more accessible when they need to be serviced and/or complained about 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 application of different printing inks colors are possible.

The printing press is preferably 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°. Preferably, 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 rest position, in particular the maintenance position and/or installation position, differ from the position defined by the axis of rotation of the at least one printing material guide element 201 axial 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%, more 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;
• 8 eine schematische Darstellung eines Versorgungssystems für

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;
• 8th a schematic representation of a supply system for

coating agent.

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. 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 understood to mean a drive motor 208 which is connected to the at least one first central cylinder 201 in a torque-transmitting and/or capable of transmitting torque manner without the interposition of further rotary bodies that are in contact with the printing substrate 02. Under a single drive 208 is is to be understood here as a drive motor 208, which is embodied as a drive motor 208 exclusively for the at least one first central cylinder 201. The first drive motor 208 of the first central cylinder 201 preferably has at least one permanent magnet, which more preferably is part of a rotor of the first drive motor 208 of the 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 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, there are preferably at least two and more preferably exactly two rows extending in the axial direction A of print heads 212 are offset from one another in the circumferential direction of the first central cylinder 201, preferably such 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 embodied as a single linear row of nozzles, but results from the sum of a plurality of individual, more preferably two, offset from one another in the circumferential direction Rows of nozzles.

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 composed of all working areas of print heads 212 of this at least one nozzle bar and is preferably composed 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, there are multiple rows of printheads 212, more preferably four double rows, and even more preferably eight double rows of print heads 212 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 print image can be realized without changing the number of drops contributing to the print 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 level of accuracy of the target data on the rotational position of the first drive motor 208 of the first central cylinder 201, 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 designed, for example, as at least one CCD sensor and/or as at least one CMOS sensor. By means of this at least one first print image sensor and an ent The corresponding evaluation unit, for example the higher-level machine controller, preferably monitors and regulates activation of 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. 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 point that has to run through the entire transport path of printing substrate web 02. This connection point has a thickness, i.e. a smallest dimension, that is greater than the thickness of the printing material web 02. The connection point is essentially as thick as two printing material webs 02 and the adhesive strip together. As a result, difficulties can arise when the connection point passes through the gap between the nozzles of 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 matching alignment of this print head 212 to be repositioned and/or to be repositioned in relation to the at least one print head 212 that is already attached, but at most by chance, 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 there is therefore 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 repositioned print head 212 relative to a position of the target area of at least one previously attached print head 212. An installed position of the at least one newly and/or repositioned print head 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 of different double rows of print heads 212 already described. An installation position of the at least one new and/or rearranged print head 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 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 printhead 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 is preferably provided 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. 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.

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 that deviates from a surface normal of a surface element of the intended transport path for printing substrate 02 closest to the respective nozzle and/or from a surface normal one surface element of printing substrate 02 closest to the respective nozzle and/or deviates from a surface normal of a surface element of a transfer body closest to the respective nozzle by no more than 10° and more preferably by no more than 6° and even more preferably by no more than 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 in at least a rest position and more preferably can be arranged 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. 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 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 maintenance positions of the print heads 212 are preferably characterized in that, when the print head 212 is in its respective maintenance position, all the 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 ° point in 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°.

The respective maintenance positions of the print heads 212 are preferably characterized 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 substrate 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.

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.

The respective mounting positions of the print heads 212 are preferably characterized 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 substrate 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.

The respective mounting positions of the print heads 212 are preferably characterized in that, when the print head 212 is in its respective mounting position, all of the nozzles of this print head 212 have ejection directions that are preferably at least 4° and more preferably at least 6° and even more preferably at least 8° from a vertical Deviate 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 a vertical direction by at least 4°, more preferably at least 6° and even more preferably at least 8°.

The respective mounting positions of the print heads 212 are preferably 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; 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°.

Preferably, at least one mounting position of at least one print head 212 and preferably all print heads 212 is characterized 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 deviates by at most 2°, ejection directions of all nozzles of the 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 preferred embodiment, the at least one positioning device 217; 218, 219; 221 has at least one positioning guide 224, preferably embodied as a lever arm 224, and more preferably a plurality of positioning guides 224, preferably embodied as lever arms 224, and even more preferably one positioning guide 224, preferably embodied as a lever arm 224, per movable nozzle bar 213 and/or per movable print head 212. 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 electric motor 226 and/or as at least one hydraulic cylinder 226 and/or preferably as at least one pneumatic cylinder 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.

Preferably, 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. A pivot axis 227 of the at least one lever arm 224 is preferably 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 preferably arranged thereon 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. Preferably, at least two positioning devices 217; 218 pivot axes 227 that differ from one another. In addition or as an alternative, at least two positioning devices are preferably provided directions on a common pivot axis 227.

At least four positioning devices are preferably provided, 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 color are configured 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 pushing the at least one positioning drive 226, in particular pneumatic cylinder 226, against the at least one print head 212 and/or the nozzle bar 213 having the at least one print head 212 against the at least pulls and/or presses a 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 second locking element can preferably be used to fix the at least one print head 212 in its mounting position, for example by pushing the at least one positioning drive 226, in particular pneumatic cylinder 226, against the at least one print head 212 and/or the nozzle bar 213 having the at least one print head 212 against the at least pulls and/or presses an 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 lock the at least one print head 212 in its maintenance position, for example by pushing the at least one positioning drive 226, in particular pneumatic cylinder 226, against the at least one print head 212 and/or the nozzle bar 213 having the at least one print head 212 against the at least pulls and/or presses a maintenance stop. 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 permit 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. At least one maintenance device 222 is preferably 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 is 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 one of the areas closest to this at least one nozzle of the area provided for printing substrate 02 can be and/or is arranged along the transport path and/or when the print head 212 is in the at least one maintenance position, at least one maintenance device 222 can be and/or is arranged between at least one nozzle of the at least one print head 212 and a region of a transfer body that is closest to this at least one nozzle.

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.

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 working area, measured in axial direction A, of the 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 at most 2% of the defined by the maximum width of printing material that can be processed with printing press 01.

The distance covered by the axial movement of the at least one maintenance device 222 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 width of the working area of the at least one print head measured in axial direction A 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.

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.

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 331 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, 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 pulling means 228 and/or pushing means 228 is arranged in a stationary manner and at for example as at least one rail 228 and/or toothed rack 228.

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 preferably serves 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. 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 maintenance device 222. The at least one maintenance device 222 is preferably assigned at least two, more preferably 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.

The at least one maintenance device 222 is preferably 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 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 be assigned to the nozzle bars 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. Each area serving as a protective cover can preferably 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.

When the at least one print head 212 is in the printing position, at least one nozzle of this at least one print head 212 is preferably located below the supply path, along which the at least one maintenance device 222, preferably by means of the at least one feed device 223, is preferably located 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 rest 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 the printing machine 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 at least one first of the at least two print heads 212 in its first printing position a first rest distance, in particular a maintenance distance and/or installation distance from a first working position of the same at least one first nozzle of the same. Preferably, at least a second of the at least two print heads 212, in particular this first printing unit 200, can be arranged, preferably by means of a second positioning device 218 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 212 has a second rest distance, in particular a maintenance distance and/or assembly 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 second maintenance position and/or second 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 print head 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.

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.

This printing press preferably permits a method for positioning at least one print head 212, embodied as an inkjet 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 mounting position, and/or is set aside by a provided transport path of the at least one printing material web 02 and/or is set aside by a printing material 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 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 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, ink-jet printing press, web-fed printing press, web-fed ink-jet printing press, rotary printing press, web-fed rotary printing press, web-fed rotary ink-jet 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

225

-

226

Positioning drive, electric 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

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 257

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

suction line

274

reservoir

275

-

276

Vacuum source, vacuum buffer

277

Vacuum source, vacuum regulator

278

vacuum supply line

279

degassing line

280

-

281

vacuum line

282

normal pressure line

283

pressure regulator

284

Compressed air source, air pump

285

-

286

compensation line

287

overflow

288

supply line

289

storage pump

290

-

291

reservoir valve

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 (10)

Printing machine (01), wherein the printing machine (01) has at least one printing unit (200; 400), wherein at least one printing couple (211) is arranged inside the printing unit (200) and wherein the at least one printing unit (200; 400) has at least two than Inkjet printheads (212; 412) and wherein at least a first of the at least two printheads (212; 412) can be positioned in each case by means of a positioning device (217; 218; 219; 221) assigned to it, optionally at least either in one first printing position or can be arranged in a first idle position assigned to it and configured as a maintenance position, in which an idle position of at least one first nozzle of the at least one first of the at least two print heads (212; 412) is a first idle distance from a working position of the same at least one first nozzle has at least a first of the at least two print heads (212; 412) in its first printing position and wherein at least a second of the at least two printheads (212; 412) can be arranged at least either in a second printing position assigned to it or can be arranged in a second rest position assigned to it, in which a rest position of at least one second nozzle of the at least one second of the at least two print heads (212; 412) is a second rest distance from a working position of the same has at least one second nozzle of the same at least one second of the at least two print heads (212; 412) in its second printing position and wherein at least four positioning devices (217; 218; 219; 221) are arranged, by means of which at least one nozzle bar (213) and /or a plurality of print heads (212) assigned to the same printing color are designed to be movable together and by means of which the print heads (212) can each be arranged optionally in a respective printing position and/or at least one respective maintenance position and wherein the at least one printing unit (200; 400 ) at least one as a printing center cylinder (201; 410) has a printing material guide element (201; 401) that is configured to be rotatable about an axis of rotation (207; 407) and wherein an axial direction (A) extends parallel to the axis of rotation (207; 407) of the at least one printing material guide element (201; 401), characterized in that characterized in that the printing unit (211) has a plurality of nozzle bars (213), each of which has a number of print heads (212) and that the at least four positioning devices (217; 218; 219; 221) each have a positioning drive (226) per movable nozzle bar (213) and that the printing press (01) is designed as a web-fed printing press (01) and that in the printing position of the at least one print head (212; 412) at least one nozzle of this at least one print head (212; 412) is arranged below a supply path, along the at least one maintenance device (222) can be moved by means of at least one feed device (223) between at least one parked position and at least one use position a is arranged and wherein in the rest position of this at least one print head (212; 412) this at least one nozzle is arranged above this supply path and that an intended position of the at least one maintenance device (222) in its parked position in relation to the axial direction (A) differs from an intended position of the at least one in relation to the axial direction (A). Maintenance device (222) in its operating position by at most 50% of a width, measured in the axial direction (A), of a working area of a nozzle bar (213; 413) having the at least one print head (212; 412) and/or at most 50% of a maximum the working width of the printing press (01) that can be processed with the printing press (01) and that the first resting distance differs from the second resting distance by at least 2 cm. printing press claim 1 , characterized in that in the at least one first rest position configured as the first maintenance position at least one maintenance device (222) is and/or can be assigned to at least the at least one first nozzle of the at least one first print head (212; 412) and that one position of this at least a first nozzle in the at least one first printing position and a position of this at least one first nozzle in the at least one maintenance position in relation to an axial direction (A) defined by the axis of rotation (207; 407) of the at least one printing material guide element (201; 401) by at most 50% of a width, measured in the axial direction (A), of a working area of a nozzle bar (213; 413) having the at least one first print head (212; 412) and/or at most 50% of a maximum printing material width that can be processed with the printing press (01). specified working width of the printing press (01). printing press claim 2 , characterized in that in the at least one first th maintenance position, at least one first maintenance device (222) can be and/or is arranged between the at least one first nozzle of the at least one first print head (212; 412) and an area of the transport path provided for the printing substrate (02) that is closest to this at least one first nozzle. printing press claim 1 , 2 or 3 , characterized in that a minimum distance between the at least one first nozzle of the at least one first print head (212; 412) in its first rest position and the at least one second nozzle of the at least one second print head (212; 412) in its second rest position is at least 2 cm greater than a minimum distance between at least the at least one first nozzle of the at least one first print head (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. printing press claim 1 , 2 , 3 or 4 , characterized in that an ejection direction of at least one 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 nozzle of the at least one print head (212; 412) in the first rest position by at least 5° . Printing machine according to Claim 1, 2, 3, 4 or 5, characterized in that a position of the at least one nozzle in the at least one printing position and a position of the at least one nozzle in the at least one rest position are on an axis of rotation (207; 407) at least one printing material guide element (201; 401) in the axial direction (A) defined by at most 50% of a width, measured in the axial direction (A), of a working area of a nozzle bar (213; 413) having the at least one print head (212; 412) and/ or at most 50% of a working width of the printing press (01) defined by a maximum printing material width that can be processed with the printing press (01). printing press claim 2 , 3 , 4 , 5 or 6 , characterized in that an adjustment path of the at least one print head (212; 412) has no component in the axial direction (A) that is greater than at most 50% of a width, measured in the axial direction (A), of a working area of one of the at least one nozzle bar (213; 413) having a print head (212; 412) and/or at most 50% of a working width of the printing press (01) defined by a maximum substrate width that can be processed with the printing press (01). printing press claim 1 , 2 , 3 , 4 , 5 , 6 or 7 , characterized in that the at least one first print head (212; 412) can be arranged by means of at least one first positioning device (217) assigned to it at least either in a first printing position assigned to it or in a first rest position assigned to it. printing press claim 2 , 3 , 4 , 5 , 6 , 7 or 8th , characterized in that the at least one maintenance device (222) is movable orthogonally to the axial direction (A) and a distance of the axial movement of the at least one maintenance device (222) is at most 50% of a width of a working area measured in the axial direction (A). of a nozzle bar (213; 413) having the at least one print head (212; 412) and/or at most 50% of a working width of the printing press (01) defined by a maximum substrate width that can be processed with the printing press (01). printing press claim 2 , 3 , 4 , 5 , 6 , 7 , 8th or 9 , characterized in that in the at least one first maintenance position at least one first maintenance device (222) can be and/or is arranged between the at least one first nozzle of the at least one first print head (212; 412) and a region of a transfer body that is closest to this at least one first nozzle is.

Images