EP1156382A2 - Method and apparatus for adjusting registration in a colour printer - Google Patents

Abstract

Method for register adjustment in which register correction resulting from a change in printed page input values (4, 4', 4) takes into account the feedback effects of the input values of the preceding printed page. Typical input values are paper thickness, toner requirement, etc. The invention also relates to a device for register adjustment.

Description

The invention relates to a method for setting the register in a multi-color printing press with several devices for the digital generation of partial color images, whereby the creation and assembly of the Partial color images is controlled so that register-based prints are achieved, wherein Influence factors on the print page that influence the register before entry a change in the creation and merging of the partial color images be taken into account.

The invention further relates to a device for carrying out the method a multi-color printing machine with several devices for digital generation of partial color images, with at least one controller for achieving register-based Print a register setting that creates and merges of the part-color images controlled and print-related influencing factors that Have an influence on the register before a change occurs in the control the creation and merging of the partial color images are taken into account.

The printing of colored representations, in particular colored images, takes place in that several partial color images are printed on top of each other. These are usually the ones Colors yellow, magenta and cyan as well as black. Special colors are also available if required added. By printing these colors on top of each other you can create all color combinations achieve, the quality of the prints significantly from the register Overprinting the partial color images depends. With digital, for example electrostatic Printing process becomes the register of overprinting achieved by controlling the imaging devices such that the Partial color images in register with one another when transferred to a printing substrate to meet.

A method and a device of the type mentioned at the outset is known from US Pat. No. 5,689. 757 known. It teaches the influence of paper roughness on the setting of Machine parameters to be taken into account before the roughness detected printing substrate passes the printing press.

However, this teaching assumes that a printed page has run out of the machine before a printed page is being processed, the other influencing factors, such as a has a different toner profile or a different printing substrate. Otherwise There is a risk of register errors in the transition phase from one printed page to another. This stems from the fact that there are still print substrates from the previous print page in the machine while one or more image cylinders with the partial color images of the new print page are illustrated or that the printing units have different print pages print if, for example, only one copy of each print page is printed shall be. In the latter case, each partial color image is only created once. In the mentioned cases determines the print substrate and the toner profile of the previous ones Pressure side the power transmission between the carrier for printing substrates, the Transfer cylinder and the image cylinder. For machines without an image transfer cylinder is the power transmission in a corresponding manner, however, without the latter also determined by the previous print substrate and previous toner profile. Becomes this power transmission not for the illustration of the new print page on the Image cylinder is taken into account, a register error always occurs when Influencing factors related to the printing side, such as the type of paper, in particular the paper thickness, or the toner job. From the above it can be seen that with a A continuous method and an apparatus of the prior art mentioned Printing process of different printed pages is not possible.

The invention is therefore based on the object of a method and a device of the type mentioned in such a way that no interruption of the Printing process between two different printed pages is required, but can be printed on immediately without any loss of quality.

With regard to the method, the object is achieved in that a register correction as a result of a change in influencing variables of the print page retroactive influence of the influencing factors of the previous printed page is taken into account becomes.

With regard to the device, the object is achieved in that the at least one controller is designed such that it is in a register correction as a result of a change in influencing variables caused by the printed page, the retroactive influence the influencing factors of the previous printed page are taken into account.

The advantage of the invention is that the print quality is seamless Continue printing with a sequence of different printed pages with changes to the Print substrate, the toner profile or other factors influencing the print page is guaranteed. The influencing factors caused by the print job, the influence on the Registers are made at such an early stage - including their interaction in the changeover area from one order to another - takes into account that through it no more register error occurs. A printing press with the invention Design can continue to print despite such a change, since the Influence of changes on the register without interrupting the pressure between the Creation of two part color images can also be compensated if already the new partial color image is created and the previous partial color image of the previous one Print page that differs from the following one, not yet or not yet completely the print substrate has been transferred. The printing machine is therefore suitable for prints in which each print page differs from the image content and / or print substrate differentiates others. There are no interruptions in settings or waste prints and the prints can be made extremely economically with high quality become.

Because every print page change from one printing unit to the next through the machine runs and also within a printing unit on the way from generation to Transfer to the printing substrate is running through the printing unit, these must different machine constellations by means of variable influencing factors for each Printing unit are taken into account.

There are print-related factors that influence the register various. One of them is the nature of the paper. It affects the Paper thickness of the curve position on a cylinder and thus the speed of the Cylinder, if this is driven, for example, by the substrate for printing substrates becomes. Such a cylinder can be an image cylinder or an image transfer cylinder act if such between the image cylinders and the carrier for printing substrates are inserted. However, the paper texture also has Effect on the contact pressure and the coefficient of friction, which in turn affect the register.

Another influencing variable is the toner profile, since this also affects the elastic coating of the Image transfer cylinder can deform elastically, which affects the gear ratio Has. Furthermore, the coefficient of friction is influenced by what also affects the transmissions. The influence of the toner profile is there all important if image and substrate-bearing elements are a drive train form, as is the case with most digital multicolor printing presses Case is. This influence is particularly strong in the case of a power transmission between Image cylinder and image transfer cylinder. The influence of the toner profile on the There is also a transmission ratio in the case of a power transmission between the substrate carrier and image transfer cylinder or between substrate carrier and image cylinder, so at Machines that do not have image transfer cylinders. Even at these power transmission points the toner profile changes the effective radius and the coefficient of friction.

The influence of properties of the used printing substrate or the influence of the selected toner job taken into account become. In order to be able to exactly compensate for these influences on the register, suggested that the consideration of the influencing variables on the basis of stored empirical values he follows. These empirical values must be, for example, via the acquisition register marks, since the paper types are If a limited number is involved, the required empirical values are available after recording available, and the measure according to the invention with consideration the influencing variables before they influence the pressure is possible. Also one It is possible to store toner profiles because the empirical values are based on the Percentage coverage of the toner profile. Regarding the Device is proposed that it is equipped with at least one memory, which contains stored empirical values, the at least one controller on the Based on these empirical values, the creation and assembly of the partial color images controls.

There are various ways of considering the influencing factors. So can be provided that the consideration of the influencing variables by a manual Input is activated. With regard to the device it is then provided that it with a Input device is equipped via the influencing factors to be taken into account can be activated manually.

Another expedient embodiment of the method provides that the consideration the influencing variables are based on a stored file of printed pages. A printing press control is then provided for the device, which is stored Contains files from printed pages and taking into account the influencing factors based on these files.

Finally, it can be provided that the influencing factors are taken into account by the same is recorded automatically. With regard to the device is then a Device for automatic detection of influencing variables provided. An example for such an automatic detection is the detection of paper thicknesses and the Consideration of empirical values that are assigned to these paper thicknesses. It is also possible for toner profiles to be measured, for example by means of a densitometer, or otherwise detected and these toner profiles assigned empirical values are taken into account. Regarding the device can it should also be provided that the device for recording influencing variables for the Detection of toner profiles is formed from the digital image files and the at least one memory contains empirical values assigned to the toner profiles.

Experience values are expediently available for different types of paper and for different toner profiles ready. The device is then at least one Memory provided with empirical values for different types of paper and / or loaded with empirical values for different toner profiles.

The use of the measure according to the invention for correction is particularly expedient a register regulation. It can be provided that the method for correcting a Register regulation serves, which is based on the registration of register marks, which of the individual printing units are printed, with the basic setting of the register by means of the registration marks and the changes of substrate and toner done by the correction before changes on the print page affect the Can have register marks. With regard to the device, it is provided that at least one controller is designed such that it does the aforementioned method executes.

Another possibility is that the procedure for correcting a register regulation serves the purpose of capturing the positions of the part-color image and substrate bearing Elements based. With regard to the device it is then provided that the at least one controller designed such that it registers by means of a detection the positions of the part-color image and substrate-carrying elements by position detection elements regulates and takes the influencing factors into account as correction factors. Such position detection elements can be used, for example, as rotation angle transmitters be trained.

Fig. 1

eine Erläuterung des der Erfindung zugrundeliegenden Problems und

Fig. 2

ein Ausführungsbeispiel der Erfindung.

The invention is explained below with reference to the drawing. Show it

Fig. 1

an explanation of the problem underlying the invention and

Fig. 2

an embodiment of the invention.

1 shows how the retroactive influence of the previous print page 33 on a new print page 34 comes about in the event of a change in influencing variables 4, 4 ', 4 "due to the print page. A print unit 9 of a multicolor printing press 1 is shown. In this case, multicolor printing presses 1 have several printing units 9 , 9 ', ..., which must be considered here The printing unit 9 has a device 2 for digitally generating partial color images 3 on an image cylinder 10. The partial color image 3 is transferred 30 from the image cylinder 10 to an image transfer cylinder 11 The partial color image 3 is transferred to a printing substrate 5 by a further transfer 31. The printing substrates 5 are transported through a printing substrate carrier 12, with the printing substrates 5 passing through all printing units 9, 9 ',.

In many multi-color printing machines 1 with digital generation of partial color images 3, 3 ', ... the drive takes place via a drive roller 28 of the print substrate carrier 12. In the exemplary embodiment shown, the print substrate carrier 12 in turn drives the Image transfer cylinders 11, 11 ', ... and these drive the image cylinders 10, 10', .... Of course, the printing substrate support 12 could directly the image cylinder 10, 10 ', ... drive. This is the case with machines that do not have an image transfer cylinder 11, 11 ', ... have. The arrows 29 show the directions of rotation of the Cylinder 10, 10 ', ... and 11, 11', ... and the arrow 23 the transport direction of the Print substrates 5.

In the illustrated embodiment, the print page is currently being changed. At the moment when the transmission 31 of the partial color image 3 of the previous one Print page 33 from the image transfer cylinder 11 to the print substrate 5 takes place, the image cylinder 10 is already with the partial color image 3 of the new print page 34 illustrated and possibly already a transfer 30 from the image cylinder 10 on the image transfer cylinder 11 instead.

With such a change of printed pages 33, 34 with different image contents and / or printing substrates 5, the following problems can arise: From a printing page on the other hand, the type of paper, in particular the paper thickness 27, can change. There however, the carrier 12 with the printing substrates 5 drives the image transfer cylinder 11, At the point of transmission 31, a curve 32 forms, which represents the speed of the image transfer cylinder 11 influenced. For example, the paper thickness 27 edged in the direction of a thicker paper, so the effective increases Radius for the drive of the image transfer cylinder 11, since in this the paper thickness 27 is included. The effective scope of the image transfer cylinder 11 is thus larger and thereby the image transfer cylinder 11 relative to the drive roller 28 slower.

A change in the coefficient of friction also has an influence on the register between a printing substrate 5 and the image transfer cylinder 11 and the Coefficient of friction between the image transfer cylinder 11 and the image cylinder 10. In the former case the paper roughness and goes in the coefficient of friction the toner image. In the second case, the toner image is decisive for the changeability of the coefficient of friction between the image cylinder 10 and the image transfer cylinder 11. Furthermore, a toner application leads to the elastic The surface of the image transfer cylinder 11 is elastically deformed, which in turn influences the transmission ratio between image transfer cylinder 11 and image cylinder 10 Has. Also changes between the image transfer cylinder 11 and the printing substrate 5 the rolling when a toner image is transferred. So changes between the previous print page 33 and the new print page 34 the toner profile of the Partial color image 3, the shifting of the cylinders 10 and 11 and the change Image transfer cylinder 11 to the print substrate carrier 12. This results in a Influencing the register, since the relative position of the partial color images 3, 3 ', ... on this Way is changed. Such a change in the relative position can occur within a Printing unit 9 take place or between the individual printing units 9, 9 ', ..., if this is preceded by changes in the influencing variables 4, 4 ', 4 " Print pages 33 and new print pages 34 are affected. Both are always and at the same time the case when printed pages 33, 34 different image contents in succession and / or different printing substrates 5 are printed, since then each created partial color image 3, 3 ', ... differs from the next.

The aim of the invention is that the registration of the prints in the area the transition from one print page 33 to the next print page 34 is also guaranteed is when these are printed one after the other without interruption.

Fig. 2 shows an embodiment of the invention. Several alternatives are shown, which can be provided in combination, but which are also possible individually. The illustrated multi-color printing press 1 is only shown with two printing units 9, 9 '. This is a simplification, normally there are four or more printing units 9, 9 ', ... These must also be considered here.

As already described above, the multi-color printing press 1 has devices 2, 2 ', ... for the digital generation of partial color images 3, 3' ... on. Each printing unit 9, 9 ', ... has image cylinders 10, 10', ... and image transfer cylinders 11, 11 ', ... and transfers partial color images 3, 3 ', ... to the printing substrates 5, these in the direction of arrow 23 is transported from the printing substrate carrier 12 through the printing press 1 become. So that the partial color images 3, 3 ', ... such from the devices 2, 2', ... are generated so that they are transferred to the printing substrates 5 in register, controls 7, 7 ', ... are provided which control the devices 2, 2', ... in this way control that the beginning of the image, lines or areas of the partial color images 3, 3 ', ... on top of each other are coordinated.

Such controls 7, 7 ', ... can be designed so that each printing unit 9, 9', ... prints a register mark 8, 8 ', ... and these register marks 8, 8', ... from one Register sensor 17 can be detected. The evaluation of the position of the register marks 8, 8 ', ... then results in the assignment of the partial color images 3, 3 ', ... and it can in the event of deviations such a correction is made that the partial color images 3, 3 ', ... are transferred in register to the printing substrates 5.

Another possibility is that the image cylinders 10, 10 ', ... and if necessary also the image transfer cylinders 11, 11 ', ... with position detection elements 18, e.g. B. are equipped with rotary encoders. Another rotary encoder 18 is provided on the drive roller 28 of the printing substrate carrier 12. By means of these position detection elements 18, the positions of the cylinders 10, 10 ', ...; 11, 11 ', ... and assign the print substrate carrier 12 to each other and it is thereby possible Position shifts to record and correct, so a more accurate register Printing can take place.

Now occurs the transition from FIG. 1 from a printed page 33 to a new one Printing page 34 and there are the two printing pages 33 and 34 in the above described type simultaneously in the multi-color printing press 1, this affects in the register as explained above. When printing different printed pages there are even more than four different printed pages in the Machine.

It is true that both the detection of the register marks 8, 8 ', ... and the Position capture capture and correct such a change in the register, however has the disadvantage that the effect of changing the influencing variables 4, 4 ', 4 " must have already occurred in order to be able to record and correct them. So that is however, continuous printing between a previous print page 33 and a new print page 34 different from the previous one is not possible.

The invention solves this problem by a register correction due to a Changes in print-related factors 4, 4 ', 4 "the retroactive influence of Influencing variables 4, 4 ', 4 "of the previous printed page 33 are taken into account.

One possibility of taking into account influencing variables 4, 4 ', 4 "is that an input device 14 data from printed pages are input, which via a Connection 24 forwarded from the input device 14 to the controls 7, 7 ', ... are, the controls 7, 7 ', ... based on this data of the printed pages retrieve stored empirical values 6, 6 ', 6 "from memories 13, 13', ... and this gives the influencing variables 4, 4 ', 4 ", which are controlled by the controls 7, 7', ... without delay. In this way, the devices 2, 2 ', ... capable of digitally generating partial color images 3, 3', ... without interruption to be made in register.

Another possibility is that via the input device 14 and a Connection 25 print jobs with data of all print pages 33, 34, ... that this included, are given to the press control 20 and this via a entered and / or stored data 19 the data to be taken into account Influencing variables 4, 4 ', 4 ", ... calls. The particular advantage of this embodiment consists in the fact that almost everything is done by means of data processing Sample toner profiles can also be obtained from the stored digital image files. The influencing variables 4, 4 ', 4 ", which the press control 20 from the Stored data 19 receives, with the help of a connection 25 'to the Controls 7, 7 ', ... relayed.

The influencing variables 4, 4 ', 4 "and the influencing variables in the form of stored empirical values 6, 6 ', 6 "can be any influencing variables. As an example here are the Influence 4 'of properties of the printing substrate 5 used or the stored empirical values 6 'for different paper types or thicknesses. Furthermore, the influence 4 "of the selected toner application or the deposited ones Experience values 6 "for different toner profiles. Further influencing variables 4 and Experience values 6 are of course possible.

The influencing variables 4, 4 ', 4 "can, however, also be performed automatically by a device 15 Determination of influencing variables can be determined. For example, this is very expedient to detect the paper thicknesses 27 by means of a sensor 16. Then it will be for example the paper thickness 27 via a connection 26 between the device 15 and the controls 7, 7 ', ... transmitted and these controls 7, 7', ... take up the empirical values 6 'assigned to these paper thicknesses 27, which are stored 13, 13 ', ... are stored. A connection 26 ′ to the press control 20 is possible, for example, the paper thickness 27 with further stored data 19 to link and in this way the influencing variable 4 'with inclusion of others To obtain properties of the printing substrate 5 used. A device 15 for automatic detection of influencing variables, for example a sensor 16 for measurement of paper thicknesses 27 is expediently on a conveyor belt 22 for Feeding of printing substrates 5 to the printing press 1 is arranged.

Corresponding devices 15 for automatic detection can of course be used of influencing factors 4, 4 ', 4 "can also be arranged at other points and on others Train wise. For example, an image can be For example, a densitometer can be used to determine the toner profiles to win, which are then also supplied to the controls 7, 7 ', ... Other options are conceivable.

So that the controls 7, 7 ', ... the partial color images 3, 3', ... the printing substrates 5 must be able to assign a sensor 21 at the beginning of the print substrate carrier 12 Detection of printing substrates 5 can be arranged, which transmits the controls 7, 7 ', ..., in which position a printing substrate 5 is on the printing substrate carrier 12 finds.

The list in the embodiment of FIG. 2 is not exhaustive and must be not all of the alternatives shown may be provided in the machine, for example it is also possible to connect only one input device 14 to the connection 24 Controls 7, 7 ', ... to be provided, which the stored empirical values 6, 6', 6 " retrieve based on manual input. Alternatively, it can be provided that the Influencing variables 4, 4 ', 4 "from stored data 19 by the press control 20 are removed. This can be done automatically or via an entry on the Input device 14 take place. Another option, which is also separate is possible, the determination of influencing variables by means of a device 15, for example a sensor 16, the assignment of the measurement to the influencing variables 4, 4 ', 4 "can in turn take place via the controls 7, 7', stored empirical values 6, 6 ', 6 "from a memory 13, 13', ... become.

Most expedient, however, are all possibilities in one machine illustrated way provided depending on existing data or crucial Influencing factors in the operation of the machine select one or the other alternative to be able to. The configurations are only exemplary, however, other types of extraction of influencing variables and processing thereof are conceivable.

Reference list

1

Multicolour printing machine

2, 2 ', ...

Devices for the digital generation of partial color images

3, 3 ', ...

Part color images

4, 4 ', 4 "

Influencing factors

4 '

Influence of properties of the printing substrate used

4 "

Influence of the selected toner application

5

Printing substrate

6, 6 ', 6 "

stored empirical values

6 '

stored empirical values for different paper types or thicknesses

6 "

stored empirical values for different toner profiles

7, 7 ', ...

Control for achieving register-based prints (e.g. the Assigned to printing units)

8, 8 ', ...

Register marks

9.9 ', ...

Printing units

10, 10 ', ...

Image cylinder

11, 11 ', ...

Image transfer cylinder

12th

Print substrate carrier

13, 13 ', ...

Storage

14

Input device

15

Device for the automatic recording of influencing variables

16

Sensor for measuring paper thickness

17th

Register sensor

18th

Position detection element, e.g. B. Angle of rotation encoder

19th

Stored data

20th

Press control

21

Sensor for the detection of printing substrates

22

Conveyor belt for feeding printing substrates

23

Arrow: transport direction of the printing substrates

24th

Connection: input device - controls

25th

Connection: input device - press control

26

Connection: device for automatic detection of Influencing variables - controls

26 '

Connection: device for automatic detection of Influencing variables - press control

27

Paper thickness

28

Drive roller of the print substrate carrier

29

Arrows: directions of rotation

30th

Transfer of a partial color image from an image cylinder to one Image transfer cylinder

31

Transfer of a partial color image from an image transfer cylinder on a printing substrate

32

Curve positions of the printing substrate and printing substrate carrier

33

previous print page

34

new print page

Claims (24)

Method for setting the register in a multicolor printing machine (1) with several devices (2, 2 ', ...) for the digital generation of partial color images (3, 3', ...), the creation and combining of the partial color images ( 3, 3 ', ...) is controlled such that register-containing prints are achieved, print-side-related influencing variables (4, 4', 4 ") which have an influence on the register, before a change occurs in the creation and assembly of the Partial color images (3, 3 ', ...) are taken into account,
characterized in that in the event of a register correction as a result of a change in influencing variables (4, 4 ', 4 ") due to the printing side, the retroactive influence of the influencing variables (4, 4', 4") on the preceding printing page (33) is taken into account. Method according to claim 1,
characterized in that the influence of properties (4 ') of the printing substrate (5) used is taken into account as influencing variables (4, 4', 4 ") on the printing side. The method of claim 1 or 2,
characterized in that the influence of the selected toner application (4 ") is taken into account as the influencing variable (4, 4 ', 4") due to the printing side. Method according to one of claims 1 to 3,
characterized in that the influencing variables (4, 4 ', 4 ") are taken into account on the basis of stored empirical values (6, 6', 6"). Method according to one of claims 1 to 4,
characterized in that the consideration of the influencing variables (4, 4 ', 4 ") is activated by a manual input. Method according to one of claims 1 to 4,
characterized in that the influencing variables (4, 4 ', 4 ") are taken into account on the basis of a stored file (19) of printed pages (33, 34). Method according to one of claims 1 to 4,
characterized in that the influencing variables (4, 4 ', 4 ") are taken into account by automatic detection of the same. Method according to claim 7,
characterized in that the paper thicknesses (27) are recorded and empirical values (6 ') assigned to them are taken into account. Method according to claim 7 or 8,
characterized in that toner profiles are recorded and experience values (6 ") assigned to them are taken into account. Method according to one of claims 1 to 9,
characterized in that empirical values (6 ') are available for different types of paper. Method according to one of claims 1 to 10,
characterized in that empirical values (6 ") are available for different toner profiles. Method according to one of claims 1 to 11,
characterized in that it serves to correct a register control based on the detection of register marks (8, 8 ', ...) which are printed by the individual printing units (9, 9', ...), this correction takes place before the print-related change can influence the register marks (8, 8 ', ...). Method according to one of claims 1 to 12,
characterized in that it serves to correct a register control which is based on the detection of the positions of the partial color image and substrate-transmitting elements (10, 10 ', ...; 11, 11', ...; 12). Device for carrying out a method according to one of claims 1 to 13 with a multicolor printing machine (1) with a plurality of devices (2, 2 ', ...) for the digital generation of partial color images (3, 3', ...), at least one Control (7, 7 ', ...) for achieving register-based prints makes a register setting in which the generation and combination of the partial color images (3, 3', ...) is controlled and influencing variables (4, 4 ', 4 "caused by the print page) ), which have an influence on the register, are taken into account before the change of the register in the control of the creation and assembly of the part-color images (3, 3 ', ...),
characterized in that the at least one controller (7, 7 ', ...) is designed in such a way that, in the event of a register correction as a result of a change in influencing variables (4, 4', 4 ") on the print page, the retroactive influence of the influencing variables (4, 4 ', 4 ") of the previous print page (33) is taken into account. Device according to claim 14,
characterized in that it is equipped with at least one memory (13, 13 ', ...) which contains stored empirical values (6, 6', 6 "), the at least one controller (7, 7 ', ... ) on the basis of these empirical values (6, 6 ', 6 ") controls the creation and assembly of the partial color images (3, 3', ...). Device according to claim 14 or 15,
characterized in that it is equipped with an input device (14) by means of which the influencing variables (4, 4 ', 4 ") to be taken into account can be activated manually. Device according to one of claims 14 to 16,
characterized in that a printing press control (20) is provided which contains stored files (19) of printed pages (33, 34) and the influencing variables (4, 4 ', 4 ") are taken into account on the basis of these files (19). Device according to one of claims 14 or 17
characterized in that it is equipped with a device (15) for the automatic detection of influencing variables (4, 4 ', 4 "). Device according to claim 18,
characterized in that the device (15) is designed such that it detects paper thicknesses by means of a sensor (16) and the at least one memory (13, 13 ', ...) contains empirical values (6') assigned to the paper thicknesses (27) . Device according to one of claims 14 to 19,
characterized in that the device (15) is designed to detect toner profiles from the digital image files (19) and the at least one memory (13, 13 ', ...) contains empirical values (6') assigned to the toner profiles. Device according to one of claims 14 to 20,
characterized in that the at least one memory (13, 13 ', ...) is loaded with empirical values (6') for different types of paper. Device according to one of claims 14 to 21,
characterized in that the at least one memory (13, 13 ', ...) is loaded with empirical values (6 ") for different toner profiles. Device according to one of claims 14 to 22,
characterized in that the at least one controller (7, 7 ', ...) is designed in such a way that it registers the register by detecting register marks (8, 8', ...) which are generated by the individual printing units (9, 9 ', ...) are printed and a register sensor (17) is detected, regulated and the influencing variables (4, 4', 4 ") are taken into account as correction factors, the correction being carried out before the print-side-related change affects the register marks (8, 8 ', ...). Device according to one of claims 14 to 23,
characterized in that the at least one controller (7, 7 ', ...) is designed such that it registers the register by detecting the positions of the partial color image and substrate-carrying elements (10, 10', ...; 11, 11 ', ..., 12) by position detection elements (18) and the influencing variables (4, 4', 4 ") are taken into account as correction factors.

Images