EP2945804A2

EP2945804A2 - Device and method for automatic ink presetting

Info

Publication number: EP2945804A2
Application number: EP14700404.8A
Authority: EP
Inventors: Manfred Fritscher; Stephan Kanzler; Wolfgang Klein; Lothar KÜHLMEYER
Original assignee: Manroland Sheetfed GmbH
Current assignee: Manroland Sheetfed GmbH
Priority date: 2013-01-16
Filing date: 2014-01-14
Publication date: 2015-11-25
Anticipated expiration: 2034-01-14
Also published as: WO2014111372A3; PL2945804T3; DE102013113280A1; CN105026157A; EP2945804B1; WO2014111372A2

Abstract

The intention is to improve a method for automatic ink presetting on inking units in printing units of printing machines. In an inking unit, the intention is to preset ink-metering apparatuses in accordance with a quantity of inking zones before the printing, in such a way that a printed print product comes as close as possible to a print master. For this purpose, printing-means-specific and printing-machine-specific adjustment parameters are determined and the ink-metering elements are preset using the adjustment parameters determined in advance. Furthermore, according to the invention, a value for a presetting correction is determined and is stored in a central memory of a print-shop network.

Description

Apparatus and method for automatic color presetting

The invention relates to a device for automatic color presetting according to claim 1 and a method for automatic color presetting of inking units according to claims 6 and 9. In multicolor printing, a substrate is successively moved or conveyed through a plurality of inking units and thus printing units of a printing machine, wherein in each printing unit usually a different color is applied. For autotypical se- quential printing, the four scale colors black, magenta, cyan, and yellow, or possibly special colors, are usually printed, with a separate inking unit for each of these colors.

For controlling or regulating the color application to the printing material, each inking unit is assigned a color metering device. The ink metering device of each inking unit comprises a plurality of ink metering elements and a lifting roller. The number of Farbdosierelemente corresponds to the number of ink zones within the inking unit. The Farbdosierelemente are designed for example as a so-called slider. Depending on the position of the slider, which can be different for each of the ink zones, a corresponding amount of ink comes to a

Ductor roller of the inking unit, said amount of ink is transferred via the lifting roller of the ductor roller to a first inking roller of the inking unit.

The color design of a printed product to be printed is defined in the prepress stage, wherein area coverage values are defined for the colors to be printed and the inking units of the printing press involved in the printing. For each pixel of each color zone of each color unit, a surface coverage value is specified, so that the area coverage values of the pixels of a color zone result in a (mean) individual area coverage value per color zone. For printing, the ink dosing elements and the squeegee rollers in each inking unit must be preset from the ink coverage values defined in the prepress stage in such a way that the first possible printed product printed with this default comes as close as possible to a prepress document.

However, all previously known methods for automatic color presetting on inking units of a printing press have in common that only printing ink-specific setting parameters are used for automatic color pre-setting. This limits the accuracy of the methods for automatic color pre-setting known from the prior art.

Thus, DE 10 2004 01 1 239 A1 discloses a method for automatic color presetting on at least one inking unit of a printing press. For the purposes of the method, a respective ink dosing device, which comprises a number of ink dosing elements corresponding to the ink zone number of the inking unit and a squeegee roller, is preset in such a way before printing that a printed product comes as close as possible to a preprinted original Farbdosierelemente and / or the squeegee roller of the ink metering device or each inking unit in a first step printing ink specific adjustment parameters are determined, being determined for the Farbdosierelemente and / or the squeegee of the Farbdosiereinrichtung of the or each inking unit in a second step pressure machine specific adjustment parameters, and wherein the default of Farbdosierelemente and / or the lifting roller of the ink metering device of the or each inking unit using the determined pressure medium-specific adjustment parameters and the determined pressure-machine-specific adjustment parameters suc gt.

It is therefore proposed, on the one hand, to use pressure-medium-specific (ie, for example, ink-specific) setting parameters and, on the other hand, printing machine-specific (for example, also printing unit-specific) setting parameters for presetting the ink metering device of an inking unit of a printing press. It depends on the quality of the color preset how many adjustments to the coloration are required to set the printed colors according to those colors on a sample sheet used as a default. The more control cycles that are required, the higher the set-up times and the amount of waste generated during the test runs.

There are different methods of color presetting. In the case of a self-learning color preset, optimized relationships between a slider position provided for the ink metering and an associated area coverage of the color to be printed on the print original are determined on the basis of default values for each combination of printing ink, ink series and substrate category by means of a plurality of learning operations. The resulting parameters are then stored locally in the control center of the press and are available for further order processing. If necessary, the same learning processes are to be carried out on any further printing presses of the operator, since the already existing data are not available there.

On this subject more printed publications have become known.

DE 29 22 964 A1 shows a system for printing press preparation and control in which data characterize press and print product-dependent factors in order to produce the desired printed product on a printing press. Means for predetermining mechanical settings depending on input data, and means for adjusting all mechanical settings according to the predetermined set values.

DE 43 11 1 132 A1 shows a method for color control in a printing press, in which density spectra of trial prints of the inks with predetermined area coverage and of the paper white are stored. Density spectra of measuring points per color zone of the original and at corresponding points in the printed product are used as a linear combination of the area covered weighted density spectra of the proofs of the individual printing inks and the paper white represented. The area coverage is calculated to approximate the density spectra optimally by linear combination. The ink feed is changed in case of deviation of the area coverage of printed product and template until an approximation of the density spectra is achieved.

DE 100 03 797 A1 shows a representation of paper color and printing properties on the monitor. To select substrates and printing inks for multicolour printing, the type of print substrate and its printing properties are stored and displayed on a monitor before being printed on a computer. The color image to be printed is digitally entered and displayed on the monitor according to various printing methods and printing inks and their properties. An input keyboard can be used to select the substrate type and printing method for a simulated proof on the monitor.

DE 102 45 702 A1 shows the adaptation of the color control to the physical properties of ink and printing material. A method for controlling the color guide in a printing press with inking uses a computer in the physical properties of ink and / or substrates known as data. The stored data are read into a color control model stored in the computer and the optimum settings regarding the color guidance are made before or during the printing process.

DE 198 22 662 A1 shows an image-data-oriented printing machine and a method for operating the image-data-oriented printing press. In the method, basic knowledge about the interaction of operating media in the printing press is obtained through printing trials or during production, stored in an expert system and used for the printing process. EP 0 976 556 A1 shows a maintenance and inspection system for a printing press. A maintenance and inspection computer uses signals from the press to determine the condition of consumables, the load and the Wear of machine components reflecting quantities. From this time and extent of appropriate maintenance measures are determined.

EP 1 466 734 A2 shows a control for a printing machine. The controller is connected to a memory in which data records with setting values of already executed print jobs are stored. Via an input device connected to the controller, values for the presetting of the printing press for new print jobs are entered. The controller compares values of a new print job with values of already executed print jobs, so values of entered data records should be modifiable according to specifiable criteria.

The invention is therefore based on the object to provide a novel method for automatic color presetting on inking units of a printing press. This object is achieved by means of a device having the features according to claim 1 and by methods having the features according to claims 6 or 9.

According to the invention, all printing presses of a printing company or of a printing group are calibrated with uniform means. Calibration is performed to set the ink feed in all printing units and presses using a uniform ink and a uniform printing form and substrate. The calibration is carried out successively and printing unit for printing unit, so that after the calibration process specific machine-dependent parameters for the presentation of calibration curves for the presetting of Farbdosiereinrichtungen exist for all printing works of all involved printing presses. The machine-dependent setting parameters required for color presetting are stored separately locally in control devices for each printing unit. This storage can take place at each printing unit itself or in the printing machine coordinated in the machine control, such as at the control station. As a result, the parameters required for presetting the color dosage with respect to the printing process for printing material and inks to be processed are generated in a printing network and then centrally registered, stored and made available as correction factors determined for various printing standards. In this case, the color presetting on all different printing presses uses the same correction factors determined for the different available printing standards and printing inks.

The use of the stored parameters takes place in the devices connected to the printer network and thereafter in coordination between the printing presses used, taking into account order data and data for the print job to be used materials, in particular the substrate and the inks used.

Preferably, the characteristics for the color presetting are stored in a master database with data records for characterizing parameters for different coloring standards.

An automatic ink preset device according to the invention has ink dosing devices divided into a number of ink zones of the inking units. The devices use pressure-specific and pressure-medium-specific adjustment parameters, each stored in a memory. For presetting the Farbdosierelemente the Farbdosiereinrichtung the inking come with the memories of the pressure medium and printing press specific adjustment parameters in combination. According to the invention, a first memory device is provided in or in connection with each printing press, in which printing machine-specific parameters for the setting of each ink metering element are deposited at least but for each inking unit. Outside the printing machine, but in data-related connection to the printing press, a second storage device is provided, are stored in the pressure medium or printing ink-specific parameters for each in the printing press to be printed ink. A computing device is provided with the first and the second memory device and with actuators the Farbdosierelemente coupled. The computing device generates actuating signals from the data of the first and the second memory device, which are passed to the presetting of each Farbdosierelementes for presetting.

The second storage device for storing and changing data is advantageously designed such that the data for labeling individual printing inks can be filed in a different manner according to coloring standards and / or printing material classes.

The correction values are stored in a retrievable manner for the purpose of generating preset values of the color metering of ink metering elements on the basis of the printing machine-specific parameters.

Furthermore, the second memory device can store the correction values for each stored printing ink with marking of the individual printing inks in accordance with coloring standards and / or printing material classes, the correction values being determined for the purpose of generating new or changed parameter values from setting values of color-dosing elements on the basis of printing processes carried out were. The correction values are rewritten or overwritten to existing values, with a correction factor = 1 corresponding to 100% being used as the default output value.

Preferred embodiments of the invention will become apparent from the dependent claims and the description below.

Embodiments of the invention will be explained in more detail with reference to drawings. Show

Figure 1 is a sectional view of an inking unit of a printing machine in

Area of a paint dosing device,

FIG. 2 shows a partial section in FIG. 1 along the section line II-II, FIG. 3 shows a schematic illustration of the application of the presetting method in a printing machine according to the invention,

Figure 4 is a diagram of a printing network and

Figure 5 is a schematic for applying presetting correction in conjunction with various staining standards.

The invention is used on a printing press 1, which is shown by way of example in FIG. 3 as a sheet-fed offset printing press. The printing machine 1 has a series of printing units 2 to 5, in each of which an inking unit 10 is provided for supplying a printing ink to a printing plate, which is mounted in each case on a plate cylinder 18 in the printing units 2 to 5. From each printing plate in the corresponding printing unit 2 to 5 of the printing machine 1, a color image of the corresponding printing ink is transferred via a blanket cylinder 19 to arc leading impression cylinders 20 guided sheet. The plate cylinder 18, blanket cylinder 19 and impression cylinder 20 are marked in Figure 3 by way of example for the first printing unit 2 with reference numerals.

Fig. 1 and Fig. 2 show a diagram of an inking unit 10 of a printing press. The inking unit 10 has an ink fountain 1 1 as a color memory for ink 12, which is transferred to a ductor roller 13. The amount of printing ink 12, which passes from the ink fountain 1 1 on the ductor roller 13 is determined by the position of Farbdosierelementen 14, which are assigned according to Figure 2 each a color zone in the inking unit 10 and can be opened or closed different degrees. The quantity of ink transferred from the ink fountain 1 1 to the ink fountain roller 13 thus takes place zonally differently depending on the opening position of a corresponding ink metering element 14. From the ink fountain roller 13, a color layer is removed in a reciprocating motion by means of a lifting roller 15 and onto a first inking roller 16 of the inking unit 10 transmitted (double arrow 17). It is thus also determined depending on how long the squeegee roller 15 rests against the ductor roller 13, an amount of ink that transmits the squeegee roller 15 of the ductor roller 13 to the ink roller 16. The presetting of the color dosing at the beginning of a print job is made on the basis of pre-stage data. From the preliminary stage data, the expected ink requirement of a printing form to be printed can be determined depending on the size of a region to be inked (area coverage) corresponding to the ink zones. From the color requirement is then closed to preset data of the color metering. For this purpose, it is necessary that the metering function, ie the amount of ink generated depending on the setting of the ink metering elements 14, is known as a function of the ink requirement. This dependency must be determined in advance, as otherwise proper presetting is not possible.

Essential for the method to be used according to the invention is that each printing press of a printing press group, a printing works or a printing group is calibrated according to a standardized mode with regard to its coloring properties.

For calibration, a largely identical basic setting of the inking units and their functional and control elements is necessary. For this purpose, the necessary adjustment operations for all printing units 2 to 5 are performed.

On the basis of such a fundamentally adjusted setting of all elements of the printing units involved in the dyeing and dampening, the setting parameters for a standardized dyeing are determined.

For this purpose, in each of the printing presses 1 to be calibrated, a basic parameter set (PO, P1) is successively printed in each of their printing units, each with a standardized printing plate, on a standardized printing substrate and a standardized ink used in all printing units 2 to 5 (preferably cyan is used) the relevant color guide settings of Farbdosiereinrichtungen produced in an inking unit under defined conditions for a printing press. This basic parameter set PO, P1 reproduces the characteristics for the ink feed adjustment in a printing unit between the opening positions of each of the ink dosing elements and an associated area coverage (ie the expected ink consumption) on the printing plate used in order to obtain a certain color required. layer thickness required on the paper, which is required for a predetermined color density to be determined by color density measurement.

When performing these calibration operations, the setting of the opening position of the color dosing elements is preferably carried out by means of an automatic control method using offline or inline measurements on print control strips on sheets printed according to predetermined conditions.

In Figure 3, the assignment of the parameter sets PO, P1 of the printing units 2 to 5 is represented by corresponding characteristic curves.

In this way, basic requirements for a uniform inking preset on all printing units and in all printing machines of a work unit, such as a printing company, are achieved for the achievement of a predetermined color value in the printed image. By means of such normalization of the coloring settings, the same conditions for presetting can be created for each ink dosing element in each printing unit and on all printing presses.

The calibration method uses a per se known self-learning adjustment method for obtaining color-dose settings from pre-stage data. In this procedure, it can be assumed that the same test printing material is used in all test steps in order to be able to guarantee the comparability of the parameter values obtained in all cases. For presetting the Farbdosierelemente 14 is determined from the parameters obtained during the calibration PO and P1 each Voreinstellkennlinie, PO the Dosierelementstellung for the color requirement zero at 0% area coverage FD and P1 determines the slope of the curve with increasing color requirements up to 100% area coverage FD ,

Starting from the calibrated initial state, the device of a printing machine 1 for the execution of a specific existing print job With a current job printing form and associated current job inks easily done by the correction of the presets to the final settings bes set the job requirements for the default setting of the inking units 10 of the printing machine 1 depending on the ink used in each case correction factors.

In order to carry out the presetting of the inking units 10, the setting values of all color-metering elements 14 are determined on the basis of a surface coverage FD from the print original on the basis of standard values and correction values.

For all colors of the defined staining standards, correlations, which are parameterized in a database, are used for optimized coloring, so that the parameters can be used at any time to set up a printing press for these relationships.

The parameterized relationships mentioned initially concern all known or already used application inks occurring in a printing shop. These are stored in a master database (with color data, parameter data) 8, characteristic values such as density, filter and L ^* a ^* b value under a unique color identifier or color name or a unique ink designation.

An additional distinction is made in accordance with FIG. 5, in that different predefinable coloring standards F1 to F4 and / or different categories of printing substrate surfaces are determined on the basis of the color data. Depending on the selected coloring standard F1 to F4 and depending on the substrate category used, in practice changes in the color setting which are to be carried out to achieve the desired density of a printing ink in the printed image result.

Basically yes was determined in the calibration coloring settings of the printing press 1, starting from a standard ink, the basic relationship of area coverage FD and opening position of a Farbdosierelements 14 per inking unit 10, so that when specifying a area coverage distribution for the inking units 10 of the printing units 2 to 5 one for all printing 2 to 5 and Farbdosierelemente 14 unique setting is possible. In the application of this standard data to a print job, however, a further adjustment of the Dosierelementeinstellung is necessary because of the specific printing inks and substrates. This necessary change in color setting from the calibrated value is stored as correction factor Z for each known or used ink in combination with each substrate category in the master database 8 in addition to the factors density, filter and Lab value under a unique color identifier (see Figure 5).

In this case, the master database 8 is subdivided into the coloring standards F1 to F4, which relate to the color schemes or color combinations or printing methods to be used, which are to be taken into account as presettings for print jobs. Coloring standards such as F1 to F4 in FIG. 5 are differentiated, among others, according to ISO standards, according to company-specific adaptations of ISO standards, to company standards, to color types such as UV inks and similar criteria. In the master database 8 any and any number of coloring standards can be deposited.

The correction factor Z is obtained as follows:

[A] For a particular selected combination of inks (Staining Standard F1 - F4) and substrates, a set of printing plates is inserted in the printing machine 1.

[B] For this purpose, the coloration is preset according to the calibration standard (curves K2 - K5) by converting the area coverage of the various printing plates from the precursor data (CIP3) to 100% into control values of the ink-dosing elements 14.

[C] This set of plates is reprinted from the preset with the job inks on the selected substrate, subject to quality control.

[D] The quality control is carried out by means of a color control system until a printed image with the best possible color is available (good sheet). [E] Now, the deviations of the setting values of the color metering elements 14 from the conversion of areal coverage values are determined on the basis of the characteristic curves K2-K5 for the regulated state of the setting values and the deviations are identified in the form of deviation factors and made storable as correction factors Z.

[F] The provided correction factors Z are only stored by the color control system if the printer considers this to be reasonable and confirms.

[G] The output value for each color is a correction factor Z = 1 corresponding to 100% specified in the master database, since a calculation of color values must be executable. The provision of new factors takes place with reference to this base of the correction values Z in the master database for the respectively used combinations of standard color, printing ink and printing material category and in particular if the determined correction value Z deviates from the value stored in the master database.

[H] The correction factors Z can therefore be stored at the request of the operator for each corresponding printing ink in the respectively corresponding coloring standard and for the respectively suitable printing material category.

The recovery of the correction factors Z can be standardized by fundamentally performing a corresponding series of printing operations using standard printing plates for common combinations of colors and substrates. In this way, a comprehensive set of correction factors Z can quickly be represented. The recovery of the correction factors Z can also be done directly from the normal printing operation out. In this case, the representation of applicable correction factors Z for different pressure conditions is more random and may require subsequent adjustment operations. It is therefore important above all the standardized deposit of correction factors Z, which takes place in the context of the application of a color control system on one or more printing presses of a printing company or a network. This correction Actuators Z may then be continually adjusted if the operator (s) can identify enhancements to the adjustment if correction factors Z are reissued or changed at the completion of a control process. However, such a variation of the correction factors Z always relates to the initial state Z = 1 and is not related to a respective last state of an already adapted correction factor Z.

If the required correction factors Z for the printing inks and printing material categories of a print job are all present, then these are applied to the basic setting of the ink metering directly from the master database in the color presetting.

As default values for a correction factor Z, the values Z = 1 or Z = 100% are used, as long as no true corrections of the coloring have been carried out after a control process starting from the presetting.

The correction of the presetting takes place in which the correction factor Z is calculated both into the parameter PO as a zero value of the respective setting or conversion curve K2 to K5 and into the parameter P1 as the slope of the respective setting or conversion curve K2 to K5. The setting or conversion curves K2 to K5 are thus either raised and steeper or else both lowered and flattened.

For a correction factor Z of the color magenta on a matt printing substrate in a certain coloring standard with the value 1, 25, a multiplication factor of 125% is applied to the standard position determined from the corresponding area coverage FD by the setting or conversion curve in PO and P1 is multiplied by 1.25.

The newly calculated slider position then largely corresponds to the color requirement for the selected job color and the substrate to be printed or its category of surface finish. Starting from identically calibrated printing machines within a printing works, the determined correction factors Z of the color database apply to all applications in which the selected coloring standard is used. By means of the printing processes for setting up the system, pressure-medium-specific correction factors Z are obtained which include a dependence of the settings of the ink dosing elements on the standard values of the calibration in relation to the applied printing ink and the substrate used or of its substrate category and which are centrally located within one Printer network P-net, as shown in Figure 4, is stored.

The correction factors Z are then available for the processing of future print jobs which are to be carried out with the same coloring standard (also using the same printing material class).

For this purpose, the printing network P-net contains a central control device 7 for the printing press, with staff being provided for the provision of order data and the control of processes.

In FIG. 4, devices of a prepress 6, symbolically represented by the control device 7, two printing presses 1 with printing units 2 to 5 and one respective control desk 9.1 and 9.2 and devices for further processing operations (further processing 30) are connected by data technology.

For storing order data and presetting data, a parameter memory 8 is provided. This is coupled to the control device 7 and the control stations 9.1, 9.2, so that stored in the parameter memory 8 both data and data can be retrieved. Among other things, the data are defined as pressure medium-specific parameters and are used to calculate the presetting values for the color dosing described above.

In FIG. 3, the transmission of the preset values for the ink metering elements 14 starting from the parameter memory 8 and in conjunction with a parameter memory 9 in control stations 9.1 and 9.2 via presetting functions in the ink boxes 1 1 of the inking units 10 in the printing units 2 to 5 of FIG Printing machine 1 shown schematically. From the parameter memory 9 of the control stations 9.1 and 9.2 For this purpose, printing machine-specific parameters PO, P1 belonging to the particular printing press 1 to be used are provided. In connection with this, the presetting of each individual ink metering element 14 can then be calculated via the resulting default settings K2 to K5, which are shown here specifically for each printing unit 2 to 5, and adjusted at the respective ink fountain 1.

Furthermore, the parameter memory 8 is connected to the parameter memory 9, which provides the correction factors Z to be used for the respective print job in accordance with the printing inks and the printing material property.

It is thus shown that in the metering element setting in each of the printing units 2 to 5, the parameters P0 and P1 in the setting curves K2 to K5 are subjected to an associated correction factor Z. Actually, here is Z2 to Z5, since for each setting curve, a separate correction factor Z is provided and included.

In the described procedure for color pre-setting, a second method variant is also included, in which the default values of the pre-setting parameters PO and P1 and also the correction factor or factors Z instead of by a learning method for color pre-setting machine, alternatively also by an operator at the printing machine control center 9.1 or 9.2 can be influenced and also entered there directly.

The method according to the invention has the effect that the correction factors Z determined for combinations of printing ink and dyeing standard, which also includes a color series, as well as associated substrate categories are stored not only locally for individual machines, but that these factors are connected to the printer network of the operator for all Printing presses are available.

The determined and stored correction values Z apply regardless of the size or the print format of the connected printing presses, provided that they have been uniformly calibrated. In the group of printers working with the same colors and coloring standards, the correction factors Z can even be applied at the different locations.

The master database can be stored for extended use of the correction factors Z outside the generating them printing in an external so-called cloud data storage. Such a cloud storage is accessible via a public network (Internet) under selected security conditions only for the users of a particular printing company. In this way, the data pool of the master database (data memory 8) can be made available to other users using comparable security conditions. This can be done whenever a printing press or the printing presses of a printing company have been calibrated with all printing presses according to the calibration method described earlier.

Finally, it is even conceivable that the correction factors can also be used for machines from other manufacturers.

Furthermore, the correction factors can also be made available to the printer or the printer in the case of printing machines calibrated by the manufacturer with the master data for standard printing inks with a specifically configured database.

A scheme for storage, as provided in the working / parameter memory 8 according to FIGS. 3 and 4, is shown in greater detail in FIG. 5 in a working / parameter memory 8 with memory data.

Here, for different staining standards F1 to F4, a series of tables is stored in which characteristic values for printing inks are stored. The characteristic values used here are color density, filter recognition and Lab values of the arrangement in the color space. These values are listed for a color code "Kumuh-Lila" in the grid at the bottom left These values are stored predefined according to the respective classifications of a coloring standard F1 to F4 and a class of a printing substrate surface.

In addition, as in the example "Kumuh-Lila", a correction value Z, which in an impression of this color "Kumuh-Purple" under the coloring standard F4 on a glossy substrate was determined. The correction value Z is obtained by setting a preset value for the ink dose setting according to the distribution of the areal coverage of a printing plate on the basis of the precursor data and then adjusting it in a color control process until the correct color density is obtained on the printed sheet.

The correction values Z normally result for a printing ink, ie evenly in a printing unit for all ink dosing elements. Differences in the correction values Z over the width of the printing unit after closed control can be compensated by averaging. Outlier values that attempt to falsify an extreme correction up or down are hidden or submitted to the printer for review.

The method according to the invention is applied as shown below:

I. The implementation of the method according to the invention is carried out by a structured data exchange between areas of the prepress and the controls of printing presses 1 in a printing or a printer sharing.

II. Prerequisite is the calibration of the printing / inking units of all printing presses involved in this process in a printing house / printing group.

III. The determination of presetting corrections is carried out in conjunction with the selected coloring standards F1 - F4 (combined with the selected substrate categories).

An averaged change in dosing element settings from the setpoint for a reference ink to the setting for a currently used ink is detected (e.g., at a defined average area coverage) and recorded as a correction factor Z for the inks used.

IV. The correction factors Z for presetting correction are differentiated according to an associated dyeing standard F1 to F4 (incl. Predetermined substrate category) and individually stored in the master database 8 of a printing network under unique color names of the printing inks used (see FIG. 5). The default value for the correction factor Z is 1 = 100%. V. Various printing presses of a printing company can be calibrated according to the same procedure, so that an absolutely equivalent adjustment of the ink metering device is given and a uniform presetting is feasible. If, in a print job created for the printing press network for any printing press of the printing company, a printing ink which is provided with the default value 1 = 100% or a correction factor Z deviating from the default value is used, then the parameters can be set to the optimum Preset correction sent to the respective printing press and taken into account in the preset values of the Farbdosierelemente (Fig. 3, 4). If existing preset data in the print shop network are processed in a print job for any printing press of the printing house and it is necessary to correct the ink metering adjustment, the adjustment for optimal preset adjustment can be sent to the master database of the printing press for storage. An adaptation of the correction values is then taken into account in future calculations of preset values for the adjustment of the color metering elements. (Figures 3, 4).

The master database can be stored for further use of the correction factors outside of the printing house in an external cloud data storage, which is accessible via a public network under security conditions for the users of the printing house, and so be usable for other users using comparable security conditions.

LIST OF REFERENCE NUMBERS

1 printing press

2 printing unit

3 printing unit

4 printing unit

5 printing unit

6 pre-press

7 printer control

8 parameter memory, color database, master database

9.1 Printing machine control station

9.2 Printing machine control station

10 inking unit

1 1 color box

12 printing ink

13 pressure roller

14 color dosing elements

15 lifting roller

16 ink roller

17 Lifting movement

18 plate cylinder

19 rubber cylinder

20 impression cylinders

30 Equipment for further processing

PO, P1 press-specific parameters for ink presetting

Z fluid specific correction factors for Farbdosiervoreinstellung

K2 - K5 characteristic

F1 - F4 staining standard

Claims

claims

1 . Automatic ink presetting device for inking units (10) in

Printing units (2 to 5) of printing presses (1), wherein at each inking unit (10), a respective Farbdosiereinrichtung, the one of the inking zone number of the inking unit (10) corresponding number of Farbdosierelementen (14) is preset in such a way before printing that a printed product printed with this presetting comes as close as possible to a printing original, wherein for the Farbdosierelemente (14) of the inking units (10) specific for printing machine and pressure medium specific parameters determined and in each case one

Memory are deposited and further wherein for presetting the Farbdosierelemente (14) the Farbdosiereinrichtung the inking units (10) with the memories of the pressure and pressure machine specific adjustment parameters are connected, characterized

a first memory device (9) is provided in or in connection with the printing press (1), in which printing machine-specific parameters (PO, P1) are stored for each ink metering element (14) but at least for each inking unit (10),

a second memory device (8) is provided outside the printing press (1) but in data communication with the printing press (1), in which printing medium-specific parameters are stored for each printing ink to be printed in the printing press (1),

that a computing device is provided which is in communication with the first memory device (9) and the second memory device (8) and with actuators of the Farbdosierelemente (14), and

in that the computing device forms control signals from the data of the first and the second memory device (8, 9) which are passed to the actuators of each ink dosing element (14) for presetting. 2. Device according to claim 1, characterized in that the second memory device (8) for storing and changing data for labeling individual printing inks according to coloring standards (F1 to F4) and / or can be distinguished according to substrate classes is formed.

Device according to claim 1 or 2, characterized

in that the second memory device (8) is set up for storing and changing correction values (Z) for each stored printing ink with labeling of the individual printing inks according to coloring standards (F1 to F4) and / or printing material classes, the correction values (Z) being for the purpose the generation of preset values of the color metering of Farbdosie- are elements (14) on the basis of press-specific parameters (PO, P1) are stored retrievable.

Device according to claim 1 to 3, characterized

in that the second memory device (8) is set up to store and change correction values (Z) for each stored ink with labeling of the individual printing colors according to coloring standards (F1-F4) and substrate classes, the correction values (Z) being for the purpose of production be determined by new or changed parameter values from setting values of Farbdosierelementen (14) on the basis of executed printing processes and stored new or overwriting.

Device according to Claims 1 to 4, characterized

in that the second storage device (8) receives print medium-specific parameters of printing inks and correction values (Z) for the inks as virtual storage in a cloud system

Method for automatic ink presetting on inking units (10) in printing units (2 to 5) of printing presses (1), wherein at each inking unit (10) comprises a respective Farbdosiereinrichtung, one of the inking zone number of the inking unit (10) corresponding number of Farbdosierelementen (14) , is pre-adjusted before printing such that a printed with this default printed product of a master copy comes as close as possible, for the Farbdosierelemente (14) of the inking units (10) druckwerks- and / or druckma- and also wherein the presetting of the Farbdosierelemente (14) of the Farbdosiereinrichtung the inking units (10) using the pressure medium and / or druckfarben- and the printing unit and / or printing press specific adjustment parameters .

characterized by the following steps:

a) Provision of preset values for the inking units (10) of a printing press (1) for a print job with specific printing inks and substrates based on precursor data for ink consumption of the printing plates of the print job by means of printing-machine and / or printing machine-specific parameters stored in the printing press (PO, P1),

b) acting on the printing unit and / or printing press specific parameters (PO, P1) with correction values (Z) for a derived from the data of the print job Druckmittel- and / or ink-specific preset correction per inking, and

c) carrying out the ink dosing preset for the inking units (10) on the basis of the preset values applied with the correction values (Z),

d) wherein the correction values (Z) are determined by comparing calibrated presetting values for the color metering elements with adjusted setting values of a currently used printing ink as factors that are assigned to classes of printing material.

Method according to claim 5, characterized in that

in that the correction values (Z) are obtained by comparison of setting values of the color metering for a reference ink used to determine the press-specific parameters (PO, P1) against adjusted setting values for the color metering of a currently used ink, preferably at a defined average area coverage, and

e) that the correction values (Z) obtained in this way for a pressure-medium-specific presetting correction in a central memory of a printing press / printing network corresponding to a defined assignment to data of printing inks and printing materials are stored.

8. The method according to claim 6, characterized

in that the correction values (Z) are determined as pressure medium-specific adjustment parameters for the ink dosing elements (14) assigned to the ink zones, wherein printing medium-specific adjustment parameters are dependent at least on the type of printing ink to be used and / or a substrate or a substrate class to be used. 9. A method for automatic ink presetting of inking units (10) in printing units (2 to 5) of printing machines (1), wherein at each inking unit (10) a respective Farbdosiereinrichtung, one of the ink zone number of the inking unit (10) corresponding number of Farbdosierelementen (14 ), is preset prior to printing, that a printed printed with this default printed matter as close as possible to a master copy, wherein for the

Farbdosierelemente (14) of the inking units (10) engine and / or printing machine specific and pressure medium and / or printing ink-specific adjustment parameters are determined and wherein further the default setting of

Farbdosierelemente (14) of the ink metering device of the inking units (10) using the pressure medium and / or printing ink as well as the printing unit and / or printing press-specific adjustment parameters,

characterized by the following steps:

a) calibration of printing presses (1) or groups of presses by determining uniform printing unit and / or printing machine specific parameters (PO, P1) for the ink metering of all Farbdosierelemente (14) of all printing units (2 to 5) of a printing press (1) and for all printing presses a press group,

b) adjusting the ink metering elements (14) of the inking units (10) of a printing press (1) for a print job with specific printing inks and printing stocks or printing substrates of a particular printing material class by means of the printing unit and / or printing press specific parameters (PO, P1), c) Determination of a value (correction value Z) for a pressure medium and / or Printing ink-specific presetting correction by comparison of average presetting values for the ink metering elements (14) with respect to a reference ink used for determining the printing unit and / or printing machine-specific parameters (PO, P1) compared to the regulated adjustment values of a currently used printing ink, preferably at a defined ink level average area coverage, is made and

d) storing the correction values (Z) thus obtained for a presetting correction of the ink metering setting in a central memory (8) of a printing machine / printing network (P-net) corresponding to a defined assignment to printing inks and Printing materials or substrate classes.

10. The method according to claim 8, characterized

that in step a) pressure-medium-specific setting parameters for the Farbzonen assigned Farbdosierelemente (14) are determined, with pressure-medium-specific adjustment parameters at least on the type of an ink to be used and / or a substrate to be used or a Druckstoffklasse dependent and

that in step b) printing unit-specific and / or printing press-specific adjustment parameters (P0, P1) are used, which are determined exclusively as valid for the ink dosing elements (14) assigned to the ink zones.

1 1. Method according to one or more of claims 5 to 9,

characterized in that the correction values (Z) for the presetting correction are determined taking into account the printing unit and / or printing press specific adjustment parameters (PO, P1).

12. The method according to one or more of claims 5 to 10,

characterized in that the correction values (Z) for the presetting correction as comparison value from setting values of a standardized Farbdosiervor- adjustment and regulated settings for a particular ink and a particular substrate or a particular substrate class be determined such that the comparison values for a printing ink are given as an average value, wherein comparative values are calculated taking into account a tolerance limit. 13. The method according to one or more of claims 5 to 1 1, characterized in that the correction values (Z) for the Voreinstellkorrektur determined as a comparison value of set values of a standardized Farbdosiervoreinstellung and regulated settings for a particular ink and a particular substrate or a particular substrate class in that the comparison values are output from a color control system of the printing press (1) and offered to the operator for use in a central memory (8).

14. The method according to one or more of claims 5 to 12, character- ized in that data for Voreinstellkorrektur after a selectable

Dye standard can be differentiated and / or stored distinguishable according to a selectable surface printing substrate and

in that the data for the presetting correction in combination with unambiguous color identifiers or color names or printing color designations of known or used printing inks are stored in master data of a memory (8) of a printing network (P-net).

15. The method according to one or more of claims 5 to 13, characterized in that data for Voreinstellkorrektur all printing machines (1) the same calibration within a printing press or printer network (P-net) in conjunction with unique color designators or color names or ink designations of known or used inks are provided.