EP2786866B2 - Printer - Google Patents

Description

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

Printing units of printing machines, in particular rotary printing machines, for example rotary offset printing machines, usually have at least one inking unit and, in the case of offset printing machines, often also at least one dampening unit. Such an inking unit usually has a supply of ink, which is transferred via a series of rollers on a plate cylinder. A dampening unit usually has a supply of dampening solution which is transferred to a transfer cylinder via a series of rollers.

Depending on the width of a substrate to be processed, the individual rollers and cylinders usually have adapted effective widths, otherwise there would be a risk of transmission between rollers and / or between rollers and cylinders and / or between cylinders and / or between cylinder and substrate in that too little printing ink or dampening solution is transferred or that printing ink or fountain solution collects on a roll edge and is accidentally dripped off or thrown off.

Since there are different formats for printed products to be produced in different printers, for example newspapers and thus a large number of different widths of substrates to be processed, in many cases, the effective width of all cylinders and / or cylinders of the printing unit must be adjusted accordingly. This requires a large design effort and thus considerable costs.

By the WO 03/031184 A1 a printing unit is known which has at least one ink supply, at least one ink feed roller, at least one standing in contact with the ink feed roller film roller, at least one inking roller and at least one standing in contact with the at least one inking roller form cylinder.

By the WO 2008/028744 A1 a color supply of a printing unit is known which has a number of metering elements which at least partially exceeds a necessary number of metering elements. By prior use, a printing unit of a printing machine is known which has a color supply, a ink feed roller, a film roller, a inking roller, a plate cylinder and a ink transfer roller and a Farbreibzylinder and wherein a plurality of metering elements of the ink supply are wider together than the film roller and at most as large as the ink feed roller and wherein the inking roller is narrower than the forme cylinder.

The invention has for its object to provide a printing unit.

The object is achieved by the features of claim 1.

The achievable with the present invention consist in particular that a design effort of a printing press can be kept low for a variety of possible widths of substrates and yet an optimal printing result by avoiding unwanted color transfers is achieved. By using components that are selected from a given selection of widths, no constructive effort required for each new printing press must be operated for these components, since it is easy to choose from a range of suitable widths. In the case of ink supply and ink feed roller, an adaptation to a substrate width can be achieved by closing more or less metering elements, without making any structural adjustments. In a transfer of ink from an inking roller to a form cylinder, however, an adjustment to the substrate is made to prevent in any case that edges of printing plates, such as printing plates are accidentally colored and / or ink transferred to a counter-pressure cylinder and / or a substrate could.

A further advantage is that effective widths can be arranged decreasing to an existing in a transport path of ink Farbreibzylinder to avoid dripping or throwing away ink at the ends of effective widths and that the inking cylinder itself not adapted directly to the substrate width may have, because in any case by its axial movement has portions of its effective width, which are not constantly in contact with other rollers.

Another advantage consists in coordinated effective widths of different components of the printing unit, which allow both a transport of ink from the ink supply to a substrate and a transport of detergent in the opposite direction at least up to a film roll. From the forme cylinder results in a reduction of the effective width up to a inking cylinder, which distributes the detergent over a greater axial length distributed to the ink transfer roller, which in turn is wider than the film roller, so that the film roller on its full effective width with detergent can be supplied. As seen in the transport direction of the printing ink, there is no roller that would be wider than its subsequent roller without even performing an axial movement. This prevents build-up and dripping and / or ejection of ink in the printing operation.

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

Fig. 1

eine schematische Darstellung einer Druckeinheit einer Druckmaschine;

Fig. 2

eine schematische Darstellung eines Transportwegs von Druckfarbe aus einem Farbvorrat bis auf einen Bedruckstoff.

Show it:

Fig. 1

a schematic representation of a printing unit of a printing machine;

Fig. 2

a schematic representation of a transport path of ink from a color supply to a substrate.

A printing machine, preferably a rotary printing machine and more preferably a rotary offset printing machine has at least one printing unit 01. The printing press is preferably designed as a roll printing press, that is able to process web-shaped printing material 24. The at least one printing unit 01 is preferably part of at least one printing unit 02 of the printing press. The at least one printing unit 01 has at least one inking unit 03. Preferably, the at least one printing unit 01 additionally has at least one dampening unit 04. The at least one printing unit 01 has at least one first cylinder 06, preferably designed as a forme cylinder 06, and at least one second cylinder 07, which is in contact with the at least one first cylinder 06, preferably designed as a transfer cylinder 07. The at least one first cylinder 06 and the at least one second cylinder 07 together form a cylinder gap 08, in particular a transfer gap 08. The at least one forme cylinder 06 is preferably designed as at least one plate cylinder 06. A plate cylinder 06 has at least one fastening device for at least one removable, plate-shaped printing plate. The at least one transfer cylinder 07 is preferably designed as at least one blanket cylinder 07. A blanket cylinder 07 has on its lateral surface at least one elevator, which consists of an elastic material and is used for a transfer of printing ink. Preferably, a counter-pressure cylinder 27 is arranged, which together with the at least one transfer cylinder 07 forms a pressure nip 26 in which ink is transferable to a substrate 24 and / or transferred.

Preferably, the at least one printing unit 01 is formed as at least one double printing unit 01, in each of which two transfer cylinders 07 serve each other as a counter-pressure cylinder and together form a printing gap 26, in the ink on a substrate 24 is transferable and / or transmitted.

The at least one inking unit 03 has at least one ink supply 09, for example in the form of a paint box 09. The at least one ink supply 09 is preferably in operative connection, in particular immediate operative connection, for example at least one ink feed roller 11, which is designed, for example, as ink ductor 11 is. By such an operative connection, in particular immediate operative connection of two components, it is to be understood, for example, that in a proper operation, a consumable liquid can be transferred from one of the two components directly to the other of the two components and / or transmitted. A transport path of the ink extends from the at least one ink supply 09 via a plurality of rollers 11; 12; 13; 16; 17 to the at least one forme cylinder 06 and more preferably also from the at least one forme cylinder 06 via the at least one transfer cylinder 07 to a printing substrate 24. An exemplary transport path extends from the at least one ink supply 09 via the at least one formed as a paint feed roller 11 roller 11th and thereafter at least one roller 12 formed as a film roller 12, and thereafter at least one roller 13 formed as a ink transfer roller 13 and thereafter at least one roller 16 formed as a inking cylinder 16 and thereafter at least one roller 17 formed as an inking roller 17 and then at least one Shaping cylinder 06. The inking cylinder 16 is also referred to as a roller 16 in order to achieve a consistent name. The rollers 11; 12; 13; 16; 17 form in pairs called nips contact points at which they are directly or at least over a color bridge in connection and ensure a transfer of ink by color splitting.

The at least one printing ink constitutes a consumable liquid of the at least one printing unit 01. Accordingly, the at least one ink supply 09 is a supply 09 of a consumable liquid of the printing unit 01. A roller 11; 12; 13; 16; 17 is disposed downstream relative to a component of the at least one inking unit 03 when it is arranged along the transport path of the ink after this component. A roller 11; 12; 13; 16; 17 is disposed upstream relative to a component of the at least one inking unit 03, when it is arranged along the transport path of the ink in front of this component.

The at least one dampening unit 04 has at least one dampening solution reservoir 18, for example in the form of a spray bar 18. The at least one dampening solution reservoir 18 is preferably in operative connection with at least one dampening solution conveying device 19, in particular immediate operative connection. The at least one dampening solution delivery device 19 is designed, for example, as at least one dampening drive cylinder 19. The dampening cylinder 19 is also referred to as a roller 19 in order to achieve a consistent name. The active compound consists for example in that dampening solution is sprayed from the at least one spray bar 18 on the at least one dampening solution conveyor 19. A transport path of the dampening solution preferably extends from the at least one dampening solution reservoir 18 via a plurality of rollers 19; 21 to the at least one forme cylinder 06. An exemplary transport path extends from the at least one dampening solution reservoir 18 via the at least one roller 19 formed as dampening cylinder 19 and then via at least one roller 21 formed as dampening roller 21 and then onto the at least one forme cylinder 06. Preferably, at least one roller 22 designated as dampening roller 22 and / or smoothing roller 22 is set against the at least one dampening cylinder 19 in such a way that it constitutes a dead end with respect to the transport path and only a homogenization of a dampening solution film on the at least one Feuchtreibzylinder 19 is used.

Accordingly, the at least one dampening solution supply 18 is a supply 18 of a consumable liquid of the printing unit 01. A roller 19, 21 is arranged downstream relative to a component of the at least one dampening unit 04 as it travels along the transport path of the fountain solution is arranged according to this component. A roller 19; 21 is disposed upstream relative to a component of the at least one dampening unit 04, when it is arranged along the transport path of the fountain solution in front of this component.

An inking cylinder 16 and a dampening cylinder 19 are rollers 16; 19, in addition to a rotation in an operation of the printing unit 01 additionally at least temporarily perform or execute a movement in an axial direction A. They serve to even out a color layer or fountain solution layer on adjacent rollers 13; 17; 21 and thus on an entire transport of ink and / or dampening solution. Preferably, at least 20 mm, more preferably at least 25 mm, and even more preferably at least 30 mm long, paths traveled by the at least one ink-jet cylinder 16 and / or by the at least one wet-rub cylinder 19 with respect to the axial direction A.

A width of a roller 11; 12; 13; 16; 17; 19; 21; 22 and / or a cylinder 06; 07 is preferably a dimension of this roller 11; 12; 13; 16; 17; 19; 21; 22 and / or this cylinder 06; 07 parallel to a rotational axis of the forme cylinder 06 and / or the transfer cylinder 07 and in the axial direction A. An effective width is in the case of designed as a transfer cylinder 07 second cylinder 07 and / or in the case of formed as a forme cylinder 06 first cylinder 06 has a width an area intended for color transfer. In the case of a plate cylinder 06, an effective width is an entire width of the at least one printing plate or printing plates arranged and / or arranged on the plate cylinder 06. An effective width is in the case of a roller 11; 12; 13; 16; 17; 19; 21; 22, in particular in the case of a paint feed roller 11 and / or in the case of a film roller 12 and / or in the case of an inking roller 17 and / or in the case of a dampening roller 21, a width of a coating of a roll shell surface, which is provided for ink transfer or for the transfer of dampening solution. In particular, cylindrical pins and / or roll necks are irrelevant for the respective effective width.

Preferably, a number of components of the printing unit are further adapted to a maximum width of printing material 24 to be processed with the printing press, while other components are roughly adapted only insofar as they are selected from a number of predetermined widths. These predetermined widths allow a reduction in costs, as for these components not re-design work must be made for each substrate width.

Thus, there are components whose effective width deviates by a predetermined width from a maximum width of a printing material 24 that can be processed by the printing press. But there are also components whose effective width is selected from a fixed number n of regardless of a maximum width of a processable with the printing substrate 24 width values. The set number n is, for example, at least two and at most seven, preferably at least three and at most six, and more preferably five. The larger this number n, the more accurate a matching of printing substrate widths is possible. The smaller this number n, the less constructive effort is involved in designing a new press order.

In particular, the printing unit 01 the at least one ink supply 09, the at least one ink feed roller 11, the at least one standing in contact with the ink feed roller 11 film roller 12, the at least one inking roller 17 formed as a roller 17 and at least one with the at least one inking roller 17 in contact standing form cylinder 06. The at least one ink supply 09 has, in particular in the axial direction A, a total number m of metering elements 23 next to one another. Such metering elements 23 serve to introduce differently sized color flows in zones distributed over the axial direction A into the transport path through the inking unit 03, for example, in order to be able to uniformly print different sized color assignments in one printed image. For example, the metering elements 23 are designed as colorimeters 23 or stripping elements 23. But it is also possible to form the metering elements 23 as pumps 23 or valves 23. The effective width of the at least one ink feed roller 11 oriented in the axial direction A is at least as great as a total effective width of the total number m of metering elements 23, which at the same time represents an effective width of the at least one ink supply 09. As a result, the at least one ink feed roller 11 can in each case be used together with the ink supply 09 and remain arranged independently of a width of a printing material 24 to be printed. The total effective width of the total number m of metering elements 23 is preferably at least 1200 mm and / or four times the width of a page to be printed by the printing machine, in particular a newspaper page. Preferably, at least one metering element 23 is arranged closed. Preferably, at least the at least one closed metering element 23 has an effective width of at least 20 mm, more preferably at least 30 mm and even more preferably at least 40 mm. Preferably, all metering elements 23 have a same width.

An effective width of the at least one ink feed roller 11 oriented in the axial direction A is This ensures that the at least one ink feed roller 11 can be used together with the at least one ink supply 09, without the at least one ink feed roller 11 at each design order new to the at least to have to adjust a color supply 09. The at least one ink supply 09 and the at least one ink feed roller 11 are preferably those components whose effective width is selected from a defined number n of width values determined independently of a maximum width of a printing material 24 that can be processed by the printing press.

On the other hand, the at least one film roller 12 has an effective width oriented in the axial direction A which is smaller than the total effective width of the total number m of metering elements 23. The at least one film roller 12 is preferably at the maximum width of a machine-processable Stock 24 adapted. In order to prevent printing ink from reaching areas of the at least one ink feed roller 11 which lie in their axial position outside the effective width of the at least one film roller 12, preferably at least one of the metering elements 23 is arranged completely closed. In particular, the at least one film roll 12 preferably has an effective width oriented in the axial direction A which is greater than a total effective width of a residual number r of at least partially opened metering elements 23. This is preferably ensured by the fact that not only a metering element 23 is completely closed, but so many metering elements 23, that the defined width of open metering elements 23 is less than the effective width of the at least one film roll 12th

Thus, preferably no ink emerges at one point from the at least one ink supply 09, to which it could not be transported further by means of the at least one film roller 12 because of its axial position. The at least one film roller 12 is preferably one of the components whose effective width deviates by a defined width from a maximum width of a printing material 24 that can be processed by the printing press.

Along the transport path of the printing ink to the at least one film roller 12, the at least one ink transfer roller 13 is then arranged. An effective width of the at least one ink transfer roller 13 is greater, preferably by 1 mm to 20 mm and more preferably by 2 mm to 10 mm greater than the effective width of at least one film roller 12. Preferably, the at least one ink transfer roller 13 is also one of the components whose effective width differs by a predetermined width from a maximum width of a processable with the printing press substrate 24.

Along the transport path of the printing ink to the at least one ink transfer roller 13, the at least one inking cylinder 16 is then arranged. An effective width of the at least one Farbreibzylinders 16 is greater than the effective width of the total number m of metering 23. This is particularly advisable because the at least one Farbreibzylinder 16 must be wider at least by its axial movement length, as that with him in contact standing rollers 13; 17. Preferably, the at least one inking cylinder 16 is a component whose effective width is selected from a fixed number n of width values determined independently of a maximum width of a printing material processable with the printing press 24.

Along the transport path of the printing ink after the at least one inking cylinder 16 and standing in contact with the at least one inking cylinder 16, the at least one inking roller 17 is arranged, which is in contact with the at least one forme cylinder 06. An effective width of the at least one inking roller 17 is smaller than an effective width of the at least one inking cylinder 16. An effective width of the at least one inking roller 17 is preferably smaller than an effective width of the at least one forme cylinder 06. This ensures that edges of Printing forms, in particular of printing plates are not colored and that thus no ink can be transferred accidentally by means of the edges of the printing plate on the substrate 24. The at least one inking roller 17 is preferably one of the components whose effective width deviates by a defined width from a maximum width of a printing material 24 that can be processed by the printing press. Preferably, the at least one forme cylinder 06 is one of the components whose effective width is a predetermined width of a maximum width deviates from a processable with the printing press substrate 24.

The effective width of the at least one in and / or against an axial direction A movable Farbreibzylinders 16 is greater than the effective width of the ink feed roller 11 and / or as the effective width of the at least one film roll 12 and / or as the effective width of the at least one Ink application roller 17 and / or as the effective width of the forme cylinder 06 and / or as the effective width of the at least one ink transfer roller thirteenth

The effective width of the at least one inking roller 17 is smaller than the effective width of the at least one film roller 12. This is because the effective width of the at least one film roller 12 is preferably selected in such steps as the effective width of a metering element 23 of the at least correspond to a color supply 09, while the effective width of at least one inking roller 17 can be adjusted exactly to the maximum width of the processable with the printing press substrate 24.

The printing press is characterized in that the effective width of the at least one forme cylinder 06 is smaller than the total effective width of the total number m of metering elements 23. This is due to the fact that the effective width of the at least one film roller 12 can preferably be selected in such steps is that correspond to the effective width of a metering element 23 of the at least one ink supply 09, while the effective width of the at least one forme cylinder 06 can be adjusted exactly to the maximum width of the processable with the printing substrate 24.

An effective width of a downstream roller 11; 12; 13; 16; 17; 19; 21; 22, along the transport path of a consumable liquid of the printing unit 01 from a supply 09; 18 of this consumption liquid up to one at the formation of the Cylinder gap 08 involved cylinder 06; 07 between an upstream roller 11; 12; 13; 16; 17; 19; 21; 22 and this participating in the formation of the cylinder gap 08 cylinder 06; 07 is smaller or larger than an effective width of this upstream roller 11; 12; 13; 16; 17; 19; 21; 22 and smaller than an effective width of this involved in the formation of the cylinder gap cylinder 06; 07. In particular, no color rings build on edges of effective widths, which could then drip or be thrown off.

Preferably, the printing press is characterized in that the effective width of the at least one forme cylinder 06 and / or the effective width of the at least one inking roller 17 and / or the effective width of the film roller 12 by a predetermined width of a maximum width of a processable with the printing press Substrate 24 deviates and / or that a minimum number of closed metering elements 23 is dependent on the maximum width of a processable with the printing press substrate 24.

Preferably, the printing press is characterized in that the total effective width of the total number m of metering elements 23 and / or the effective width of the at least one ink feed roller 11 and / or the effective width of the inking cylinder 06 of a fixed number n of irrespective of a maximum width selected width values set with the printing machine processable substrate 24. More preferably, the width value is selected as a function of the maximum width of a printing material 24 that can be processed by the printing press. This means, in particular, that in the design of a printing machine corresponding to a desired printing substrate width one of previously determined width values is selected, which is preferably the next higher predetermined width value from the predetermined printing substrate width. Thus, the selected width value is never too small and the design effort is still lower than if all components would have to be adjusted individually to the desired width of the printing material 24.

With regard to the effective widths, the following ascending order results: inking roller 17, forme cylinder 06, film roller 12, ink transfer roller 13, ink supply 09, ink feed roller 11, ink transfer cylinder 16.

Preferably, the effective width of the at least one ink supply 09 and / or the total number m of metering elements 23 is at least 10 mm and at most 40 mm smaller than the respectively selected one of the defined width values.

The effective width of the at least one ink feed roller 11 is preferably greater than the respectively selected one of the width values by at most 40 mm and more preferably at most 10 mm.

Preferably, the effective width of the at least one inking cylinder 16 is at least 5 mm and more preferably at least 15 mm greater than the respectively selected one of the predetermined width values.

Preferably, the effective width of the at least one film roller 12 is less than the width of a metering element 23 greater than the maximum width of printing material to be processed with the printing press 24th

The effective width of the at least one ink transfer roller 13 is preferably greater by at least 1 mm and at most 10 mm than the effective width of the at least one film roller 12.

Preferably, the effective width of the at least one inking roller 17 is smaller by at least 5 mm and at most 15 mm than the maximum width of printing material 24 to be processed by the printing press.

The effective width of the at least one forme cylinder 06 is preferably smaller by at least 1 mm and at most 10 mm than the maximum width of printing material 24 to be processed by the printing press.

Preferably, the specified width values are 1280 mm, 1400 mm, 1600 mm, 1680 mm and 1730 mm. Preferably, the maximum width of printing material 24 to be processed with the printing press is always smaller than the respectively selected one of the defined width values.

LIST OF REFERENCE NUMBERS

01

printing unit

02

printing unit

03

inking

04

dampening

05

-

06

Cylinder, forme cylinder, plate cylinder

07

Cylinder, transfer cylinder, blanket cylinder

08

Cylinder gap, transmission gap

09

Stock, color stock, color box

10

-

11

Color conveyor, ink feed roller, ink fountain roller

12

Roller, film roller

13

Roller, ink transfer roller

14

-

15

-

16

Roller, ink-jet cylinder

17

Roller, inking roller

18

Stock, dampening solution supply, spray bar

19

Dampening agent conveyor Roller, dampening cylinder

20

-

21

Roller, dampening roller

22

Roller, dampening roller, smoothing roller

23

Dosing element, colorimeter, wiping element, pump, valve (09)

24

substrate

25

-

26

nip

27

Impression cylinder

A

Direction, axial

m

Total number of dosing elements

r

Residual number of dosing elements

Claims (11)

1. A printing unit (01) of a printing press, wherein the printing unit (01) has at least one ink reservoir (09) that is in direct operative contact with at least one ink feed roller (11), at least one film roller (12) in contact with the ink feed roller (11), at least one ink applicator roller (17) and at least one forme cylinder (06) designed as a plate cylinder (06) and in contact with the at least one ink applicator roller (17), whose effective width is a total width of the at least one printing plate or printing plates arranged and/or arrangeable on the plate cylinder (06), and wherein along a transport path for printing ink at least one ink transfer roller (13) is arranged adjacent to the at least one film roller (12), and wherein along the transport path of the printing ink at least one ink distributor (16) is arranged adjacent to the at least one ink transfer roller (13), and wherein along the transport path of the printing ink the at least one ink applicator roller (17) is arranged downstream of the at least one ink distributor (16), and wherein the at least one ink reservoir (09) has a total number (m) of metering elements (23) arranged side by side, and wherein an effective width of the at least one ink feed roller (11) is at least as great as a total effective width of the total number (m) of metering elements (23), and wherein the at least one film roller (12) exhibits an effective width which is smaller than the entire effective width of the total number (m) of metering elements (23), and wherein an effective width of the at least one ink applicator roller (17) is smaller than an effective width of the at least one forme cylinder (06), characterized in that with respect to the effective widths the following ascending order is obtained: ink applicator roller (17), forme cylinder (06), film roller (12), ink transfer roller (13), ink reservoir (09), ink feed roller (11), ink distributor (16).
2. The printing unit according to claim 1, characterized in that along a transport path for printing ink between the at least one film roller (12) and the at least one ink applicator roller (17), at least one ink distributor (16) that is moveable in and/or counter to an axial direction (A) is arranged, whose effective width is greater than the effective width of the ink feed roller (11) and/or whose effective width is greater than the effective width of the at least one film roller (12) and/or whose effective width is greater than the effective width of the at least one ink applicator roller (17) and/or whose effective width is greater than the effective width of the forme cylinder (06).
3. The printing unit according to claim 1 or 2, characterized in that the entire effective width of the total number (m) of metering elements (23) is at least 1200 mm.
4. The printing unit according to claim 1, 2 or 3, characterized in that the effective width of the at least one forme cylinder (06) is smaller than the entire effective width of the total number (m) of metering elements (23).
5. The printing unit according to claim 1, 2, 3 or 4, characterized in that an effective width of the at least one ink applicator roller (17) is smaller than an effective width of the at least one film roller (12).
6. The printing press according to claim 1, 2, 3, 4, or 5, characterized in that the effective width of the at least one forme cylinder (06) and/or the effective width of the at least one ink applicator roller (17) and/or the effective width of the film roller (12) deviates by a predetermined width from a maximum width of a printing material to be processed by the printing press and/or in that a minimum number of closed metering elements (23) is dependent on the maximum width of a printing material to be processed by the printing press.
7. The printing unit according to claim 1, 2, 3, 4, 5, or 6, characterized in that the entire effective width of the total number (m) of metering elements (23) and/or the effective width of the at least one ink feed roller (11) and/or the effective width of the ink distributor (06) is selected from a specified number (n) of determined width values that are independent of a maximum width of a printing substrate to be processed by the printing unit.
8. The printing unit according to claim 1, 2, 3, 4, 5, 6, or 7, characterized in that at least one of the metering elements (23) is arranged completely closed, and in that the effective width of the at least one film roller (12) is at the same time greater than a total effective width of a remaining number (r) of at least partially opened metering elements (23).
9. The printing unit according to claim 1, 2, 3, 4, 5, 6, 7, or 8, characterized in that a width is a dimension parallel to an axis of rotation of the forme cylinder (06) and/or in that an effective width in the case of the forme cylinder (06) is a width of an area provided for ink transfer and/or in the case of an ink feed roller (11) and/or in the case of a film roller (12) and/or in the case of an ink distributor (16) and/or in the case of an ink applicator roller (17) a width corresponds to a coating of a roller surface that is provided for transfer of color or transfer of a dampening solution.
10. The printing unit according to claim 1, 2, 3, 4, 5, 6, 7, 8, or 9, characterized in that the printing unit (01) is a printing unit (01) of a printing machine.
11. The printing unit according to claim 10, characterized in that the effective width of the at least one film roller (12) is greater than less of a width of a metering element (23) than a maximum width of printing material (24) to be processed by the printing machine.

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