DE102013226653A1 - Method for producing at least two color separations - Google Patents

Abstract

The invention relates to a method for producing at least two color separations for at least one printing operation with at least one printing machine from original image data of at least one print image to be printed, wherein the at least one printing machine has at least one print head, each having nozzles for ejecting coating agent and wherein in the preparation of the at least two color separations one of the at least two color separations dependent applied total volume of coating agent per surface of a printing material is taken into account. For example, a relationship between the areal coverage and the total volume of coating agent to be applied per area of the printing substrate is influenced by differently sized drop volumes which are used side by side within at least one color separation.

Description

The invention relates to a method for producing at least two color separations.

There are known printing methods which do not have a solid printing form. One such printing method is ink jet printing or ink jet printing. In this case, individual coating agent drops are ejected from nozzles of printheads and transferred to a substrate in such a way that a printed image results on the substrate. By individual control of a plurality of nozzles so different print images can be created. In a multicolor printing usually different nozzles eject coating agent with different properties, in particular differently colored coating agent. A print image to be printed has a plurality of shades. These different shades are usually generated by a series of primary colors, which are joined together to form different color structures.

A primary color is to be understood as meaning a color of a printed image which has a single coating agent and which is produced in the printed image by merely printing this one coating agent. A commonly used system of primary colors are, for example, the colors cyan, magenta, yellow and black. In order to determine the necessary proportions of the primary colors at the individual points of the print image to be printed from a print image serving as a template, ie from original image data of a print image to be printed, an algorithm is usually used which is also called a color profile, for example. This creates separations to all primary colors. A color separation is a monochrome partial image of a multicolor overall print image. The individual color separations are joined together during the printing process and yield the printed total print image according to the template image data.

In the context of printing methods, a surface area is understood to mean an area sum of the picture elements of a total area which is divided into picture elements and non-picture elements ( DIN 16544 ). A degree of coverage denotes a ratio of the area coverage to the total area divided into picture elements and non-picture elements (DIN 16544). The area coverage is given in% (percent), for example. An area coverage of 100% thus describes, for example, a surface completely printed with a layer. In particular, such a printed image is described, for example, with 100% area coverage, in which the maximum possible amount of a coating agent with the corresponding printing process or with the corresponding printing device was transferred to the printing substrate. When using several coating materials, for example several different printing inks, it is also possible to achieve surface coverage levels that exceed 100%. Thus, for example, by coating a complete surface one after the other in each case with the three colors cyan, magenta and yellow achieves a surface coverage of 300% and a black color impression in the viewer. On the other hand, if you coat an entire surface with a black ink, you achieve a surface coverage of 100% and also a black color impression on the viewer.

A secondary color is to be understood as meaning a color of a printed image that results from a mixture of at least two primary colors, for example a mixture of cyan with a surface coverage of 30% and magenta with a surface coverage of 20%. In this concrete mixture then results in a total area coverage of 50% with a hue of a corresponding secondary color. A color separation is a partial image consisting of all pixels of only one primary color. Overlaying all partial images of all primary colors results in the print image with all the necessary primary colors and secondary colors.

As described above, different secondary colors can be generated by corresponding blends of an identical predetermined set of primary colors. Depending on the necessary proportions of the primary colors on the secondary color and depending on the brightness to be achieved, a total necessary area coverage of the printed image can be determined. For example, a relatively high overall areal coverage is desirable if a corresponding print image is to have saturated colors. However, an excessively high degree of surface coverage involves the risk that too much coating agent is applied to the printing substrate and the printing substrate can not cope with the applied amount of coating agent, for example because printing ink then smears on transport rollers and / or because the substrate softens and / or because of a water-based printing ink and / or or tears and / or because cloudiness occurs and / or coating agent shines through the substrate and / or because printing material layers adhere to each other (blocking). Cloudiness here is preferably to be understood as uneven ink coverage, for example on solid surfaces and / or surfaces with a high paint application. The cause of cloudiness may be, for example, irregular penetration behavior of the coating agent into the printing substrate. In offset printing, for example, is usually a coated paper maximum permissible area coverage of 300%.

The area coverage is always based on one area. On the one hand, this area can be the total area of the printing material, so that the area coverage is only an average value. It makes more sense, however, to look at the area coverage locally, ie on smaller areas. For example, within a relatively small area of, for example, 1 mm 2 (1 square millimeter) or even less in average, the maximum area coverage should not be exceeded. However, it does not make sense to select the surfaces considered so small that they fall in the order of magnitude of the dot sizes of individual drops of coating material, because for example in water-based inks also introduced by individual drops of water in the point surrounding areas of the substrate away and affected these too. An averaging over an area that corresponds to at least some, for example, two to twenty point sizes, therefore makes sense.

Depending on how high the maximum permissible surface coverage is determined, various color structures, ie various combinations of primary colors to produce a secondary color and thus certain shades and brightnesses, because they would only be possible with a too high total area coverage. In ink-jet printing, lower values for the maximum permissible total areal coverage are usually specified even than in offset printing, for example 250%.

By the EP 2 202 081 A1 and the DE 10 2011 076 899 A1 In each case, a printing press is known, wherein the printing machine has at least a first printing unit with at least one inkjet printhead.

The invention has for its object to provide a method for creating at least two color separations.

The object is achieved by the features of claim 1.

The achievable with the invention advantages are in particular that in a printing machine with at least one print head, in particular at least two printheads with at least two nozzles a producible color gamut is increased and / or a particularly detailed gradation of color gradients is possible. A disturbance in the form of a Tonwertabrisses is preferably avoided. As a result, higher quality images are possible, while still avoiding damage to the substrate and / or greasing of coating and / or cloudiness in the printed image and / or blocking is avoided.

A further advantage is preferably that a printer and / or an algorithm has a greater choice in choosing a color setup to achieve a desired color location and can choose the one that is least susceptible to color build-up.

Another advantage is that with an increased selection of color structures by considering appropriate drop volumes of that color composition can be selected, which requires as little coating agent per surface of the substrate with a suitable quality of the printed image.

By setting the maximum permissible total area coverage in inkjet printing to even lower values than in offset printing, for example 250%, the color gamut which would theoretically be achievable with the corresponding combination of printing machine, printing substrate and coating agent would in some cases be significantly restricted. Due to the departure of various color structures, so various combinations of primary colors to produce a secondary color, due to the fact that they would give a higher than the maximum allowable total area coverage, a printer or usually an example color profile called algorithm for creating the color separations in limited his theoretically available options. Unlike offset printing, ink jet printing has other mechanisms. Particularly in the case of printheads, which are capable of ejecting drops of coating material of different sizes, it is found that it is advantageous not to use the areal coverage alone when it comes to selecting suitable color structures from the theoretically possible color structures. An advantageous criterion is instead or at least additionally dependent on the color separations applied total volume of coating agent per surface of a printing substrate. An advantage of the invention is preferably that the mechanisms of ink-jet printing, for example deviating from offset printing, are taken into account and the advantages of ink-jet printing are not reduced by, for example, restrictions arising from offset printing.

An approximately spherical drop of a coating agent is converted to an approximately circular point of the coating agent when hitting a substrate. In this case, a mean circle radius of the point differs from a mean spherical radius of the point Drop at most insignificant. Thus, if a second point is to be generated whose mean second circle radius is greater by a first factor than a mean first circle radius of a first point, a mean second spherical radius of a second drop that generates the second point must be approximately the same first Factor larger than a mean first sphere radius of a first drop, which generates the first point. As a result, since the volume of a sphere depends on the cube of the third radius, a second volume of the second drop must be greater by the third power of the first factor than a first volume of the first drop. Assuming a value of 1.2 (one point two) as the first factor, the second point is 1.2 (one point two) with respect to its circle radius and a factor of 1, 4 (one point) with respect to its area four) larger than the first point. However, the second drop must be larger by a factor of 1.7 (one point seven) relative to the drop volume than the first drop.

For printing machines with drop-producing print heads, such print heads are preferably used which can produce drops of different drop sizes, in particular different pot volumes. As a result, it is possible, for example, to generate very small surface densities with still high homogeneity of the printed image by means of small drops, as very high surface coverage can be generated by means of large drops and / or a point closure and thus a closed coated surface is made possible. Thus, a too pale print image and / or a Durchschienen the substrate can be prevented. For example, printheads are used by means of which at least two different drop volumes, more preferably at least three different drop volumes can be generated. An exemplary type of printhead is capable of producing exactly three sizes of droplets, the volumes of which are, for example, 3 pl (three picoliters), 7 pl (seven picoliters), and 12 pl (twelve picoliters). A picoliter is equal to 10 ^ (- 12) liters (10 high minus twelve liters).

A degree of coverage of a primary color of 100% results when using at least one print head, in particular at least one inkjet print head, when all possible printable dots are generated by the largest possible drops. With low surface coverage, for example from 0% to 40%, it is preferable to work with a smallest possible drop volume, more preferably exclusively with the smallest possible drop volume, in order to obtain a homogeneous printed image. In the area of average surface coverage, for example between 33% and 66%, different drop volumes are used mixed. For example, as the degree of surface coverage increases, a proportion of drops of a mean drop volume increases and / or a proportion of drops of the smallest drop volume decreases with increasing areal coverage. From a surface coverage of 66%, for example, drops of the largest drop volume are used in addition as the proportion increases until, as described, at a surface coverage of 100%, only drops of the largest possible drop volume are used. Preferably, but not necessarily, this is at least similarly preferred for several, in particular all primary colors.

If only drops of a drop volume are used and if the applied volume of the coating agent per area of the printing material is plotted as a function of the surface coverage to be achieved and / or achieved, the result is an approximately linear course. The slope of this approximately linear course depends on the drop volume, because the area occupied by a drop of coating material depends quadratically on the mean circle radius of the drop, but the volume is, as stated above, of the cube of the mean spherical radius.

If drops of, for example, three different drop volumes are used in a composition of the drop volumes as described above and if the applied volume of the coating agent per surface of the printing material is plotted as a function of the surface coverage to be achieved and / or achieved, this results in no linear progression. but approximately a more or less positively positively curved curve, ie a curve that becomes steeper and steeper with increasing surface coverage. It follows that, for a dependent on the surface coverage to be achieved use of different drop volumes, a volume of the coating agent to be applied to larger surface densities strong, especially disproportionately increases.

In contrast to offset printing, therefore, a dependency of the volume to be applied is not linearly dependent on a degree of coverage to be achieved. However, with inkjet printing, the areal coverage is also not suitable as the sole criterion for deciding which color structure is acceptable and which color build-up leads to danger, for example smearing of printing ink and / or damage to the printing substrate, because these dangers essentially depend on it from the volume of the coating agent applied per area. For example, in the case of a water-based printing ink, a recording capacity of the printing substrate is, for example Paper, limited and too large amounts of water to be absorbed dwells too much of the coating agent on the surface of the substrate and can lead to disturbances, such as greasing and / or blocking.

When using the entire area coverage, ie the sum of the area coverage of the individual color separations, at least two undesired scenarios are conceivable as the sole criterion. On the one hand, a color build-up could have a total areal coverage that is just below a total areal coverage ratio set as a maximum permissible overall areal coverage, and at the same time a relatively low transferred volume of coating agent could be determined. The result would be a relatively pale print image, although a higher transferred volume of coating would be harmless and would be excluded only because of the total areal coverage irrelevant in this case. As an example, a color composition can be considered which has a coverage ratio of 60% for the colors cyan, magenta, yellow and black, and thus a total area coverage of 240%. However, a total transferred volume of the four inks is only about 6 ml per m ² (six milliliters per square meter) together, which could give a relatively faint impression. On the other hand, a color build-up could have a degree of coverage classified as permissible and nevertheless lead to a total transferred volume of coating agent per area, which leads to a disturbance, for example smearing of coating agent and / or damage of the printing substrate. As an example of this, a color structure can be considered, which has a coverage ratio of 100% for the colors cyan, magenta, does not have yellow, and has a surface coverage of 40% for the color black, and thus also a total area coverage of 240%. Nevertheless, here is a total transferred volume of the three or four inks together, for example, about 14 ml per m ² (fourteen milliliters per square meter), that is more than twice as high. These differences between the two examples are based on the strong nonlinearity of the dependence of the volume to be applied on the degree of coverage to be achieved.

Advantageously, a total volume of coating agent per surface area of a printing material which is dependent on the color separations is used as a criterion instead of or in addition to decide on permissible color structures.

These advantages result in particular from a method for producing at least two color separations for at least one printing operation with at least one printing machine from original image data of at least one print image to be printed, wherein the at least one printing machine has at least one, preferably at least two print heads, the respective nozzles for ejecting coating agent and wherein during the preparation of the at least two color separations, a total volume of coating agent per surface area of a printing material to be applied, which is dependent on the at least two color separations, is taken into account. Preferably, the method is characterized in that at least two, more preferably at least three and even more preferably at least four different color separations are created. In particular, at least one and more preferably exactly one color separation is preferably produced for each coating agent to be applied. For example, when using more than four primary colors are preferably created according to more than four color separations. It is at least of minor importance for the process whether each print head is assigned to only one coating agent or whether at least one print head is used which is designed for possibly simultaneous ejection of different coating agents.

This is preferably a method for producing at least two, more preferably at least three and even more preferably at least four, preferably different color separations for at least one printing operation with at least one printing machine from preferably digital and / or physical original image data of at least one print image to be printed, for example multicolor print image , in particular total print image, wherein the at least one printing machine has at least two, even more preferably at least three and even more preferably at least four print heads each having nozzles for ejecting coating agent and preferably wherein the at least two color separations for controlling nozzles the at least one print head, in particular serve the at least two print heads and / or are usable. Preferably, only one color separation is assigned to each nozzle and / or each print head. Preferably, these nozzles serve to and / or these nozzles are used to eject coating agent in the form of drops. Preferably, each color separation contains information which itself serves as output data for controlling a plurality of nozzles of at least one printhead associated in particular of a respective color of the color separation and / or usable and / or of which such output data, in particular for controlling a plurality of nozzles, at least one, in particular a respective color of the color separation assigned printhead are preferably derived clearly.

At least one of the color separations preferably contains information by means of which a preferably provided drop volume of coating agent can be individually and unambiguously determined and / or defined for each drop to be ejected, in particular to produce the print image. More preferably, at least two, more preferably at least three, and even more preferably at least four of the color separations each contain information by which a preferably provided drop volume of coating agent can be individually and uniquely determined and / or defined for each drop to be ejected, especially for the production of the print image, in particular total print image , More preferably, the drop volume is in each case one of a predetermined selection of different drop volumes. Due to the different drop volumes very homogeneous print images are possible on the one hand with very low color coverage, on the other hand high color coverage without pale appearance is achieved. Furthermore, a higher color gamut and / or a better representation of color gradients can be achieved by better dosage options.

In the preparation of the at least two color separations, preferably a total volume of coating agent per surface area of a printing material that is dependent on the at least two print heads and dependent on the at least two color separations is taken into account, further preferably taken into account such that only color buildups are created which preclude exceeding a maximum permissible, preferably explicitly and / or preferably prior to the preparation of the color separations, total volume of coating agent per surface area of the printing substrate. Preferably, therefore, the method is additionally distinguished by the fact that the maximum permissible total volume of coating agent per surface of the printing substrate is fixed and / or will be prior to the preparation of the color separations. This maximum permissible total volume preferably depends on parameters such as a nature of the at least one print head, in particular the at least two print heads and / or a condition of at least one coating agent used and / or to be used and / or a condition of at least one printing material used and / or to be used. Preferably, therefore, the method is additionally characterized in that the maximum permissible total volume of coating agent per surface of the printing substrate depends on a nature of the at least one print head, in particular the at least two print heads and / or a condition of at least one coating agent used and / or to be used. or a condition of at least one used and / or to be used printing material is and / or will. As a result, the respective pressure conditions are taken into account in an advantageous manner in order to always obtain a maximum color gamut. A database of stored combinations of print substrate, printheads and coating materials that can be used as trouble-free can be used for a variety of combinations of substrate, printheads and coating materials, without having to perform experiments by an operator or an algorithm or unnecessarily dispensing with color structures and limiting the possible color gamut ,

The method is therefore preferably characterized in that the at least two color separations are created from digital and / or physical original image data. Under physical template image data is for example an already printed in particular by means of another printing machine print image or a manually created physical print template to understand. Such physical template image data can be captured, for example, by means of a scanner and used to create digital template image data. Preferably, the method is characterized in that the at least one print image to be printed is a multicolored print image.

Preferably, the method is characterized in that the at least two color separations serve to control nozzles of at least one print head, in particular at least two print heads, and / or can be used. Preferably, the method is characterized in that each nozzle is assigned to exactly one color separation and / or is. However, it is preferred that each color separation be printed by means of multiple nozzles and / or multiple printheads. Preferably, the method is characterized in that these nozzles serve and / or are used to eject coating agent in the form of drops. The method is preferably characterized in that each color separation contains information which itself serves as output data for controlling a plurality of nozzles of at least one print head and / or can be used and / or from which such output data can be derived.

The method is preferably characterized in that at least one of the color separations contains information by means of which an intended drop volume of coating agent can be individually and uniquely determined and / or defined for each drop to be ejected to produce the print image, in particular the total print image. More preferably, the method is additionally characterized by the fact that the intended drop volume in each case one of a predetermined selection of is preferably at least two and more preferably three different drop volumes.

Preferably, therefore, the method is characterized in that the total volume of coating agent to be applied in the preparation of the at least two color separations per area of a printing material depends on the at least one print head, in particular the at least two print heads. This dependency consists, for example, in a number and / or size of the different drop volumes which can be created by means of the at least one print head, in particular of the at least two print heads. By way of example, the printheads are printheads which generate droplets by reducing a cavity containing a coating agent by means of at least one piezoelectric element and thereby ejecting coating means from at least one nozzle connected to this cavity. Depending on the voltage applied to the at least one piezoelectric element, an unambiguous reduction of the at least one cavity and thus an ejection of a clearly defined drop volume take place. One advantage is that a very accurate calculation of the applied and / or applied total volume of coating agent per area of the printing material is made possible by the precisely defined drop volumes.

Preferably, the method is characterized in that the at least two color separations are based on at least one stored data set in which a preferably clear relationship between a surface coverage and a volume to be applied and / or total volume of coating agent per surface of the substrate is stored. Preferably, at least one such data record is stored for each coating agent. Preferably, the method is additionally distinguished by the fact that the at least one stored data set is and / or has at least one table and / or at least one curve and / or at least one database. This also advantageously allows a very accurate calculation of the applied and / or applied total volume of coating agent per surface of the printing substrate.

Preferably, the method is characterized in that the at least one stored data set depends on a nature of the at least one print head, in particular the at least two print heads and / or a condition of at least one used and / or to be used coating agent and / or a nature of at least one used and is calculated and / or modified and / or selected from a number of stored data sets and / or was. This ensures that the largest possible color gamut is available for each printing environment.

Preferably, the method is characterized in that is used in the preparation of the at least two color separations on at least one stored record per color separation, in each of which a particular clear relationship between a surface coverage and a volume to be applied by the color separation corresponding coating agent deposited per area of the substrate is. Thus, an even more accurate determination of the total applied and / or applied total volume of coating agent per surface of the printing substrate is possible.

The color separations produced are preferably used for printing the at least one print image to be printed, in particular the overall print image. Then preferably results in a method for printing at least one printed image by means of at least one printing machine, which is further preferably characterized in that at least two color separations in the described method for creating the at least two color separations are created and that by means of the nozzles of the at least one print head and on Preferably, the at least two print heads of the at least one printing machine coating agent is applied in particular in the form of drops on at least one printing material. Preferably, the method is further distinguished by the fact that the at least two color separations are created by means of at least one data processing of this at least one printing press. More preferably, the method is further characterized in that the at least one print head, more preferably the at least two print heads are driven by means of the same at least one data processing this at least one printing press to print the at least one print image, in particular by means of the same data processing of the printing press who also created the at least two color separations. Advantages are then that the color separations can still be changed during a current printing operation if necessary and that a precise coordination of determination of the color separations and creation of the finished print images is made possible.

If in the foregoing and / or below of the applied and / or applied total volume of coating agent per surface of the substrate is mentioned, then this means the sum of all volumes of the individual coating agent means associated with the individual color separations and on the substrate in their respective coverage levels are plotted. This applied and / or applied total volume is preferred of coating agent per surface of the printing substrate compared to a maximum permissible total volume of coating agent per surface of the printing substrate. This maximum permissible total volume of coating agent per surface area of the printing material is the sum of all volumes of the individual coating agent agents per surface area of the printing material that can be applied without incurring problems such as cracking of the printing material or smearing of coating material. In particular, an exceeding of this limit is preferably avoided not only on average but also locally, ie on very small subareas.

The at least one printing machine preferably has at least one printing unit in the form of an inkjet printing unit and / or the printing machine is an inkjet printing machine and / or first output data for controlling nozzles of print heads of the at least one first printing unit of the printing machine, in particular digitally stored original image data of at least one first complete printed image in accordance with which ejection of coating agent by these nozzles is performed by printheads for producing the at least one first printed total image and / or the respective output data are control data of respective nozzles to be used by printheads of at least one inkjet printing unit of the printing machine.

Particularly in connection with digital printing processes, for example inkjet printing processes, the advantage arises that the creation of the at least two color separations can be carried out relatively late, in particular only if it is already established with which printing machine and / or on which printing material and / or under which climatic conditions and / or with which coating agent a print job is to be performed. If, for example, contrary to the order planning, another printing material is used, for example because a certain type of printing material is no longer available in sufficient quantity, then the method can be used directly before the start of printing and take these changes into account. It is also possible to react to changes in environmental conditions, such as changes in humidity. Corresponding changes can even be adapted in the course of a printing operation and / or print job in the case of digital printing processes, be it because of changed conditions and / or changed printing material during a flying reel change and / or due to measurements on printed products already produced within the same print job. Corresponding changes are preferably made such that the changed conditions are taken into account by at least one raster graphics processor which converts tonal values and / or areal extents into a dot structure that can be processed by means of the at least one print head.

Advantageously, the method is preferably suitable for sheet-like substrate and for sheet-shaped substrate, in particular so used in roll-fed printing presses and in sheet-fed presses.

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

Show it:

1a a schematic representation of a printing machine;

1b a schematic representation of a printing machine with alternative web guide;

2 a schematic representation of a portion of a printing unit with a double row of printheads;

3 a schematic representation of a part of a print data processing device;

4 a schematic representation of a portion of a print data processing device, wherein broken lines indicate a plurality of print head controls and printheads;

5 a schematic representation of a coated and / or applied volume of a coating agent per surface of a printing material as a function of a surface coverage to be achieved, the three curves represent the respective proportions of three types of drops with different drop volumes (by way of example, a total volume of drops of a drop volume of 3 dash-dotted lines pl, dashed, shows a total volume of drops of a drop volume of 7 pl and shown solid throughout a volume of drops of a drop volume of 12 pl);

6 a schematic representation of a total applied and / or applied volume of coating agent per surface of a printing material as a function of the surface coverage to be achieved without regard to the different drop volumes (for example, as a curve of the three sum of curves 5 shown).

A printing press 01 has at least one printing material source 100 , at least a first printing unit 200 , preferably at least a first dryer 301 , preferably at least a second printing unit 400 and preferably at least a second dryer 331 and preferably at least one post-processing device 500 on. The printing press 01 is also preferred as an inkjet printing machine 01 educated. The printing press is preferred 01 as a roll printing machine 01 formed, more preferably as a roller inkjet printing machine 01 , The printing press 01 is for example as a rotary printing machine 01 designed, for example as a rotary web press 01 , in particular roll-rotary ink-jet printing machine 01 , In the case of a roll printing press 01 is the source of printing material 100 as Rollenabspulvorrichtung 100 educated. In the case of a sheet-fed press or sheet-fed rotary printing press, the source of printing material 100 preferably designed as a sheet feeder. In the substrate source 100 At least one printing material is preferred 02 aligned, preferably with respect to at least one edge of this printing substrate 02 , In the Rollenabspulvorrichtung 100 a roll printing machine 01 becomes at least one web-shaped substrate 02 So a printing material web 02 For example, a paper web 02 or a textile web 02 or a slide 02 , For example, a plastic film 02 or a metal foil 02 from a substrate roll 101 unwound and preferably aligned with respect to their edges in an axial direction A. The axial direction A is preferably a direction A, which is parallel to a rotation axis 111 a substrate roll 101 and / or at least one central cylinder 201 ; 401 extends.

A transport path of the at least one printing substrate 02 and in particular the printing material web 02 runs after the at least one printing material source 100 preferably by the at least one first printing unit 200 where the substrate 02 and in particular the printing material web 02 preferably by means of at least one coating agent, in particular at least one printing ink at least on one side and preferably in connection with the at least one second printing unit 400 is preferably provided on two sides with a printed image. After passing the at least one first printing unit 200 the transport path of the printing material passes through 02 and in particular the printing material web 02 prefers the at least one first dryer 301 to dry the applied ink. Printing ink is to be understood in the preceding text and generally below as meaning a coating composition, in particular also a lacquer. Preferably, the at least one first dryer 301 Part of a dryer unit 300 , After passing the at least one first dryer 301 and preferably the at least one second printing unit 400 and / or the at least one second dryer 331 becomes the substrate 02 and in particular the printing material web 02 Preferably, the at least one post-processing device 500 fed and further processed there. The at least one post-processing device 500 is for example as at least one folding device 500 and / or as a take-up device 500 and / or as at least one planned expense 500 educated. In the at least one folding device 500 is the preferred two-sided printed substrate 02 preferably further processed to individual printed products.

The following is a roll printing machine 01 described in more detail. However, the same details can be applied to other printing presses as well 01 , for example, sheet-fed presses, provided they do not conflict.

A working width of the printing press 01 is a dimension which is preferably orthogonal to the intended transport path of the printing substrate 02 by the at least one first printing unit 200 extends, more preferably in the axial direction A. The working width of the printing press 01 preferably corresponds to a maximum width, which may have a substrate to still with the printing press 01 to be processed, so a maximum with the printing press 01 processable substrate width.

The first printing unit 200 is preferably the Rollenabspulvorrichtung 100 with respect to the transport path of the printing material 02 downstream. The first printing unit 200 preferably has at least a first central pressure cylinder 201 or shortly central cylinder 201 on. If below from a central cylinder 201 the speech is, so is always a pressure cylinder 201 meant. The printing material web 02 preferably wraps around the first central cylinder in printing operation 201 at least partially. In this case, a wrap angle is preferably at least 180 ° and more preferably at least 270 °. The wrap angle is the angle measured in the circumferential direction of a cylinder jacket surface of the first central cylinder 201 along which the substrate 02 and in particular the printing material web 02 with the first central cylinder 201 in contact. Accordingly, at least 50% and more preferably at least 75% of the cylinder jacket surface of the first central cylinder are preferably seen in the circumferential direction during the printing operation 201 with the printing material web 02 in contact. This means that one, as the contact surface between the at least one first central cylinder 201 and preferably as a printing substrate 02 formed substrate 02 provided partial surface of a cylindrical surface of the at least one first central cylinder 201 the wrap around the at least one first central cylinder 201 which is preferably at least 180 ° and more preferably at least 270 °.

The first central cylinder 201 preferably has its own, the first central cylinder 201 associated first drive motor 208 on, preferably as an electric motor 208 is formed and further preferred as a direct drive 208 and / or single drive 208 of the first central cylinder 201 is trained. Under a direct drive 208 is a drive motor 208 to understand that without interposing further with the substrate 02 in contact rotating body with the at least one first central cylinder 201 is in torque transmitting and / or transferable connection. Under a single drive 208 is a drive motor 208 to understand that as a drive motor 208 excluding the at least one first central cylinder 201 is trained. The first drive motor 208 of the first central cylinder 201 preferably has at least one permanent magnet, which is more preferably part of a rotor of the first drive motor 208 of the first central cylinder 201 is.

On the first drive motor 208 of the first central cylinder 201 and / or on the first central cylinder 201 itself is preferably a first rotation angle sensor 617 arranged, the an angular position of the first drive motor 208 and / or the first central cylinder 201 itself measuring and / or measuring and sending to a higher-level machine control and / or is designed to transmit. The first rotation angle sensor 617 is for example a rotary encoder 617 or absolute encoder 617 educated. With such a first rotation angle sensor 617 is a rotational position of the first drive motor 208 and / or preferably a rotational position of the first central cylinder 201 preferably by means of the higher-level machine control absolutely determinable. Additionally or alternatively, the first drive motor 208 of the first central cylinder 201 connected in such a circuit with the machine control, that the machine control on the basis of from the machine control to the first drive motor 208 of the first central cylinder 201 predetermined first target data 617 to a rotational position of the first drive motor 208 at any time via the rotational position of the first drive motor 208 and thus at the same time the rotational position of the first central cylinder 201 is informed.

Within the first printing unit 200 is at least a first printing unit 211 arranged. The at least one first printing unit 211 is preferred to the at least one first central cylinder 201 acting and / or arranged and / or aligned and / or arranged alignable. The at least one first printing unit 211 is preferred as a first ink jet printing unit 211 trained and is preferably also first ink-jet printing unit 211 called. The at least one first printing unit 211 preferably has at least one nozzle bar 213 and preferably a plurality of nozzle bars 213 on. The at least one first printing unit 211 and thus the at least one first printing unit 200 preferably has the at least one first printhead 212 on that as an inkjet printhead 212 is trained. Preferably, the at least one nozzle bar 213 in each case at least one print head 212 and preferably each multiple printheads 212 on. Every printhead 212 preferably has a plurality of nozzles from which coating agent drops, in particular ink drops are ejected and / or ejected. A nozzle bar 213 is a component that preferably over at least 80% and more preferably at least 100% of the working width of the printing press 01 extends and that as a carrier of the at least one print head 212 serves. An axial length of the bale of the at least one first central cylinder is preferred 201 at least as big as the working width of the printing machine 01 , Each nozzle is preferably a clearly defined target area in the direction A of the width of the printing material web 02 and preferably to the direction A, in particular the axis of rotation 207 the at least one first central cylinder 201 related assigned. Each target area of a nozzle is preferably in particular with respect to the circumferential direction of the at least one first central cylinder 201 clearly defined at least in the printing operation. In particular, a target area of a nozzle is that, in particular, substantially rectilinear space area which extends in a direction of ejection of this nozzle from this nozzle.

The at least one first nozzle bar 213 preferably extends orthogonal to the transport path of the printing substrate 02 over the working width of the printing press 01 , The at least one nozzle bar 213 preferably has at least one row of nozzles. The at least one row of nozzles, viewed in the axial direction A, preferably has the entire working width of the printing press 01 and / or width of the bale of the at least one first central cylinder 201 at regular intervals nozzle openings. In one embodiment, this is a single continuous printhead 212 arranged, extending in the axial direction A over the entire working width of the printing press 01 and / or the entire width of the bale of the at least one first central cylinder 201 extends. The at least one row of nozzles is preferred as at least one linear over the entire width of the printing material web 02 formed in the axial direction A extending juxtaposition of individual nozzles. In another preferred embodiment, several print heads are juxtaposed in the axial direction A. 212 on the at least one nozzle bar 213 arranged. Since usually such individual printheads 212 are not provided with nozzles up to an edge of their housing, are preferably at least two and more preferably exactly two rows of print heads extending in the axial direction A. 212 in Circumferential direction of the first central cylinder 201 arranged offset to one another, preferably so that in the axial direction A successive printheads 212 preferably alternately one of the at least two rows of printheads 212 always preferentially alternately a first and a second of two rows of printheads 212 , Two such rows of printheads 212 form a double row of printheads 212 , The at least one row of nozzles is preferably not formed as a single linear juxtaposition of nozzles, but results as the sum of a plurality of individual, more preferably two, circumferentially offset from each other arranged juxtaposition of nozzles.

Indicates a printhead 212 multiple nozzles, so form all target areas of the nozzles of this printhead 212 together a workspace of this printhead 212 , Workspaces of Printheads 212 a nozzle bar 213 and in particular a double row of printheads 212 As seen in the axial direction A to each other and / or overlap seen in the axial direction A. In this way, even when not in the axial direction A printhead 212 ensures that seen in the axial direction A at regular and preferably periodic distances target areas of nozzles of the at least one nozzle beam 213 and / or in particular each double row of printheads 212 lie. In any case, an entire working area of the at least one nozzle bar extends 213 preferably over at least 90% and more preferably 100% of the working width of the printing machine 01 and / or the entire width of the bale of the at least one first central cylinder 201 in the axial direction A. On one or both sides with respect to the axial direction A, a narrow region of the printing material web 02 and / or the bale of the first central cylinder 201 be present, which is not the working area of the nozzle bars 213 belongs. An entire working area of the at least one nozzle bar 213 is preferred from all workspaces of printheads 212 this at least one nozzle bar composed and is preferably from all target areas of nozzles of these printheads 212 this at least one nozzle bar 213 composed. Preferably, an entire work area corresponds to a double row of print heads 212 seen in the axial direction A the working area of the at least one nozzle beam 213 ,

Preferably, the at least one nozzle bar 213 in the circumferential direction with respect to the at least one first central cylinder 201 several rows of nozzles on. Preferably, each printhead 212 a plurality of nozzles, which further preferably in a matrix of a plurality of rows in the axial direction A and / or a plurality of columns, preferably in the circumferential direction of the at least one first central cylinder 201 are arranged, wherein such columns are further preferably arranged extending obliquely to the circumferential direction, for example, to increase a resolution of a printed image. Preferably in a direction orthogonal to the axial direction A, in particular in the transport direction along the transport path of the printing substrate 02 and / or in the circumferential direction relative to the at least one central cylinder 201 several rows of printheads 212 , more preferably four double rows, and more preferably eight double rows of printheads 212 arranged one after the other. More preferably, at least in the printing operation in the circumferential direction with respect to the at least one first central cylinder 201 several rows of printheads 212 , more preferably four double rows, and more preferably eight double rows of printheads 212 successively on the at least one first central cylinder 201 arranged aligned.

Here are the printheads 212 at least in the printing operation, preferably oriented such that the nozzles of each printhead 212 essentially in the radial direction on the cylinder jacket surface of the at least one first central cylinder 201 point. Deviations from radial directions within a tolerance range of preferably not more than 10 ° and more preferably not more than 5 ° are to be considered essentially radial directions. This means that the at least one on the lateral surface of the at least one first central cylinder 201 aligned printhead 212 with respect to the axis of rotation 207 the at least one first central cylinder 201 in a radial direction on the lateral surface of the at least one first central cylinder 201 is aligned. This radial direction is one on the axis of rotation 207 the at least one first central cylinder 201 related radial direction. Each double row of printheads 212 It is preferred to associate and / or assign a printing ink of a specific color, for example one of the colors black, cyan, yellow and magenta or a varnish, for example a clear varnish. The corresponding inkjet printing unit 211 is preferred as a four-color printing unit 211 trained and allows a one-sided four-color printing of the printing substrate 02 , It is also possible to have fewer or more different colors with a printing unit 211 to print, for example, additional spot colors. Preference is then correspondingly more or less printheads 212 and / or double rows of printheads 212 within this corresponding printing unit 211 arranged. In one embodiment, at least in the printing operation, a plurality of rows of printheads 212 , more preferably four double rows, and more preferably eight double rows of printheads 212 successively on at least one surface of at least one transfer body, for example at least one transfer cylinder and / or arranged aligned at least one transmission belt.

The at least one print head 212 works for the production of coating agent drops preferably according to the drop-on-demand process in which coating agent drops are generated selectively if necessary. At least one piezoelectric element is preferably used per nozzle, which can reduce a volume filled with coating agent at high speed by a certain amount when a voltage is applied. As a result, coating agent is displaced, which is ejected through a nozzle connected to the volume filled with coating agent and forms at least one coating agent drop. By applying different voltages to the piezoelectric element is on the travel of the piezoelectric element and thus the reduction of the volume and thus the size of the coating agent drops influence. In this way, color gradations in the resulting print image can be realized, for example without necessarily changing a number of drops contributing to the print image (amplitude modulation). It is also possible to use at least one heating element per nozzle, which generates a gas bubble in a volume filled with coating agent at high speed by evaporating coating agent. The additional volume of the gas bubble displaces coating agent, which in turn is expelled through the respective nozzle and forms at least one coating agent drop.

In the drop-on-demand method, a drop deflection after ejection from the corresponding nozzle is not necessary since it is possible to achieve a target position of the respective coating agent drop on the moving printing material web 02 with respect to the circumferential direction of the at least one first central cylinder 201 solely by an emission time point of the respective coating agent drop and a rotational speed of the first central cylinder 201 and / or by the rotational position of the first central cylinder 201 set. By individual control of each nozzle, coating agent drops from the at least one print head are only at selected times and at selected locations 212 on the substrate web 02 transfer. This happens as a function of the rotational speed and / or the rotational angle position of the at least one first central cylinder 201 , a distance between the respective nozzle and the printing material web 02 and the location of the target area of the respective nozzle with respect to the circumferential angle. This results in a desired printed image, which is designed as a function of the control of all nozzles. An ejection of ink droplets from the at least one nozzle of the at least one printhead 212 is preferably carried out as a function of the predetermined by the machine control rotational position of the first drive motor 208 ,

Preferably, at least one sensor designed as a first print image sensor is arranged, more preferably at one point along the transport path of the printing material web 02 after the first printing unit 211 , By means of this at least one first print image sensor and a corresponding evaluation unit, for example the higher-level machine control, it is preferable to control all in the circumferential direction of the at least one first central cylinder 201 one behind the other and / or acting printheads 212 and / or double rows of printheads 212 of the first printing unit 211 monitored and / or regulated.

A layer of pixels formed by coating agent drops emerging from a respective first printhead 212 are preferably compared with a layer of pixels formed by coating agent drops, each from a second, in the circumferential direction of the at least one first central cylinder 201 after the first printhead 212 lying printhead 212 come. This is preferably done independently of whether these each first and second, in the circumferential direction of the at least one first central cylinder 201 one behind the other and / or acting printheads 212 process a same or a different coating agent.

After the printing material web 02 the at least one first printing unit 200 has happened, the printing substrate 02 transported further along their transport path and preferably the at least one first dryer 301 the at least one dryer unit 300 fed. The at least one first dryer 301 is preferred as a flow dryer 331 and / or radiation dryer 331 and / or hot air dryer 331 and / or infrared radiation dryer 301 educated.

Along the transport path of the printing material web 02 is preferably at least a second printing unit 400 arranged. The transport path of the printing material web 02 by the at least one second printing unit 400 runs analogously to the transport path through the at least one first printing unit 200 , Within the second printing unit 400 is preferably at least a second, as an inkjet printing unit 411 or ink-jet printing unit 411 trained printing unit 411 on the second central cylinder 401 arranged aligned. The at least one second printing unit 411 the at least one second printing unit 400 is preferably identical to the at least one first printing unit 211 the at least one first printing unit 200 , With regard to the transport path of the printing material web 02 is after the at least one second printing unit 400 at least a second one dryer 331 arranged. The structure of the at least one second dryer 331 is similar to the construction of the at least one first dryer 301 ,

In at least one variant of the printing press is the printing press 01 as a roll-rotation ink-jet printing machine 01 formed and is at least one transmission body with the at least one first pressure central cylinder 201 a transmission gap forming arranged. Then the at least one printhead is preferred 212 aligned with the at least one transmission body.

Preferably, the printing press 01 at least one print data processing device 600 or short print data processing 600 on. The at least one print data processing 600 is preferably part of the machine control of the printing press 01 and / or with the machine control of the printing press 01 connected and / or connectable. Preferably, the at least one print data processing 600 at least one as an image data memory 601 trained first data store 601 on. The at least one image data memory 601 is preferably at least a storage of image data, in particular in the form of original image data. Image data are to be understood as meaning data which contain at least one print image to be printed in electronically stored form. Such image data can be in various forms. Such a form represents a matrix of pixels, for example a bitmap. Another form represents a page description, for example in vector form, for example in the form of at least one pdf file ("portable document format" file). However, other file formats can also be used to store the image data. In particular, therefore, template image data in the form of at least one matrix of pixels and / or preferably in the form of at least one page description can be present. In particular, it should be pointed out that image data and / or original image data relate to print images, that is to say information which may also consist, for example, at least partially or exclusively of texts and / or symbols and does not necessarily have to have graphic elements such as photographs or drawings.

Template image data are preferably understood to mean those image data which correspond in their motifs and their arrangements to the printed image which would ideally have a finished printed product at the end of the production process. Template image data is preferably data that is the printing press 01 are available and / or in the printing press 01 be fed and / or were and / or stored in a data storage of the printing press 01 are stored, for example, in the at least one image data memory 601 , An operator preferably no longer has any direct influence on changes in the image data that may be made after the template image data has been created. At least such influence is preferably not necessary. Thus, an operation of the printing machine is simplified.

Preferably, the at least one print data processing 600 at least one raster graphics processor 603 on. The at least one raster graphics processor 603 is preferably a rasterization of image data, in particular original image data and a generation of raster data thereof. Preferably, the at least one image data memory 601 and the at least one raster graphics processor 603 Components of at least one preferred as an image data processor 611 trained computer 611 , Preferably, the at least one print data processing 600 at least one as raster data memory 602 trained second data store 602 on. The at least one raster data memory 602 preferably serves at least one storage of raster data. Raster data is preferably rasterized template image data. Preferably, the at least one raster data memory 602 Component of at least one preferred as Rasterdatenrechner 612 trained computer 612 , The at least one raster data computer is preferred 612 via at least a first data line 609 , For example, at least a first Ethernet line 609 with the at least one image data processor 611 connected and / or arranged connectable. More preferably, the print data processing 600 at least one raster data memory 602 and / or at least one raster data calculator 612 per printing unit 200 ; 400 on, so preferably at least two raster data memory 602 and / or at least two raster data calculator 612 with two printing units 200 ; 400 , Still more preferably, the print data processing 600 at least one raster data memory 602 and / or at least one raster data calculator 612 per printing ink and per printing unit 200 ; 400 on, so preferably at least eight raster data memory 602 and / or at least eight raster data calculators 612 with two printing units and four inks each.

A partial image is preferably a part of an image that, together with other partial images, gives an overall image. A partial image is for example a color separation of a printed image. A multicolored print image can be produced, for example, from a superposition of four partial images of the colors, in particular primary colors cyan, yellow, magenta and black, whereby other colors, for example special colors, can also be used. Raster data preferably represent at least one image matrix of picture elements, more preferably at least one sub-picture matrix of sub-picture elements. Picture elements are, for example, picture elements. Subpicture elements are, for example, subpixels. A picture element preferably corresponds a minimal section of the printed image, in particular an existing or not existing pixel. By arranging all pixels at their respective intended position within the image matrix, the printed image is formed. This intended position is preferably determined by a clearly assigned row specification and a uniquely assigned column specification. Accordingly, a partial image element preferably corresponds to a minimal section of a partial image of the printed image, for example a minimal section of a color separation of the printed image. By arranging all sub-picture elements at their respective intended position within the sub-picture matrix corresponding to the sub-picture, the sub-picture is formed. This intended position is again preferably determined by a clearly assigned row specification and a clearly assigned column specification.

Preferably, the at least one print data processing 600 at least one data mapping 604 , in particular image data assignment 604 which is more preferred than at least one raster data assignment 604 is trained. More preferably, the print data processing 600 at least one data mapping 604 per printing unit 200 ; 400 on, so preferably at least two data assignments 604 with two printing units 200 ; 400 , Still more preferably, the print data processing 600 at least one data mapping 604 per printing ink and per printing unit 200 ; 400 on, so preferably at least eight data assignments 604 with two printing units 200 ; 400 and four inks each. Preferably, the at least one data assignment 604 by means of at least one second data line 613 with the at least one image data processor 611 and / or more preferably with the at least one raster data memory 602 and / or the at least one raster data computer 612 connected and / or arranged connectable. Preferably, the at least one print data processing 600 at least a first input device 608 on.

Preferably, the at least one print data processing 600 at least one signal source 617 ; 618 for characterizing a rotational angle position, in particular at least one central cylinder 201 ; 401 on. The at least one signal source 617 ; 618 for characterizing a rotational angle position, for example, as the at least one first rotational angle sensor 617 in particular of the first central cylinder 201 and / or as the at least one second rotation angle sensor 618 in particular the second central cylinder 401 and / or as first target data 617 to the rotational position of the first drive motor 208 and / or as second target data 618 to the rotational position of the second drive motor 408 educated.

Preferably, the at least one print data processing 600 at least one register sensor 619 on and / or is the at least one print data processing 600 with at least one register sensor 619 arranged in terms of circuitry and / or connectable. The at least one register sensor 619 is preferably used to detect at least a first, preferably on the substrate 02 applied print image, for example, at least one register mark.

Preferably, the at least one print data processing 600 at least one as a synchronization device 614 trained switching device 614 on, more preferably in each case at least one synchronization device 614 per printing unit 200 ; 400 , in particular at least two synchronization devices 614 with two printing units 200 ; 400 , The at least one synchronization device 614 is preferably used to pass on incoming signals timed to each other. Preferably, the at least one print data processing 600 at least one as data preparation 616 , especially data synchronization 616 trained switching device 616 on, more preferably at least one data preparation 616 per printing unit 200 ; 400 , in particular at least two data preparations 616 with two printing units 200 ; 400 , The at least one data preparation 616 is preferably used to convert incoming data into at least one format that can be processed by subsequent devices, for example by the synchronization device 614 , Preferably, the at least one print data processing 600 at least one as at least one signal converter 621 trained for angular position switching device 621 on, in particular for rotational angle positions of the at least one first central cylinder 201 and / or rotational angular positions of the at least one second central cylinder 401 and / or rotational angle positions of the at least one first drive motor 208 the at least one first central cylinder 201 and / or rotational angle positions of the at least one second drive motor 408 the at least one second central cylinder 401 ,

Preferably, the at least one print head 212 ; 412 at least one printhead controller 622 on. More preferably, each printhead 212 ; 412 at least one own and preferably exactly one own print head control 622 on.

Preferably by means of the at least one raster graphics processor 603 are preferably selected from a preferred in the at least one image data memory 601 stored image template, for example in the form of template image data and / or portions of template image data fields, for example in the form of color separations generated and more preferably in the at least one raster data memory 602 stored. This process is called rasterization, for example. Preference is given to each printing ink per printing unit 200 ; 400 each generates at least one sub-image in the form of at least one color separation. More preferably, for each printing ink to be printed, a plurality of sub-image planes in the form of several different color separations are produced differently within respective color separations of the same printing ink, wherein a number n of these sub-image planes per ink is preferably equal to a number n of the different drop volumes obtained by means of each print head 212 ; 412 can be generated. Preferably, this number n is at least three. Each sub-image level then contains information about exactly the positions at which a pixel of the respective color and the respective size is to be printed. For example, by superimposing the sub-image planes of a printing ink, the color separation and / or the sub-image of this printing ink is produced. By superimposing all color separations and / or partial images, the entire print image results. The sub-image planes of a printing ink are preferably first combined and then stored as a sub-image of this printing ink. The partial images and the sub-image planes are also called raster data.

During screening, at least one and more preferably exactly one partial image in the form of at least one partial image matrix is produced for each printing ink from each printed image. This at least one partial image matrix preferably has rows and columns. Lines of the at least one partial image matrix preferably correspond to lines of the printed printed image which are orthogonal to the transport direction of the printing material 02 are oriented and / or correspond columns of at least one sub-image matrix lines of the printed printed image, which are parallel to the transport direction of the printing substrate 02 lie. Preferably, each partial image matrix of each printing ink is stored and / or processed in such a way that each nozzle of the printing heads associated with this printing ink 212 ; 412 preferably exactly one column of the sub-image is assigned and / or is. This column then contains entries in different rows which each have one of the corresponding default values and thus cause the corresponding nozzle to be ejected at relevant times for ejecting printing ink. By time-aligned processing of entire lines of the corresponding field matrix by the nozzles of the corresponding at least one print head 212 ; 412 arises on the substrate 02 prefers the print image to be generated in the form of superimposed matrix-like patterns of pixels preferably different inks.

The preferred in at least one data store 601 ; 602 and more preferably in the at least one raster data memory 602 deposited sub-images, in particular sub-image matrices and / or raster data are preferred to the at least one data assignment 604 transmitted. The at least one data assignment 604 is preferred with a number of printheads 212 ; 412 connected, which together have a plurality of nozzles. For example, this is at least one data mapping 604 with all printheads 212 ; 412 the respective printing unit 200 ; 400 associated with a particular ink and / or provided for the ejection of the ink for an entire color separation.

By a printed product is to be understood in the foregoing and hereinafter in particular a finished product which is both printed and optionally folded and / or cut to size.

It is preferably a method for printing at least a first substrate 02 by means of at least one printing unit 211 ; 411 a printing press 01 , wherein from stored template image data of at least one first complete print image first output data for producing or driving at least one at least one form of printed images, in particular at least individual pixels of print images defining component of at least one first printing unit 200 the printing press 01 to generate at least a first printed total print image. The method is preferably suitable for controlling nozzles of printheads 212 ; 412 at least a first printing unit 200 the printing press 01 in particular for controlling a discharge of coating agent through nozzles of printheads 212 ; 412 the at least one inkjet printing unit 211 ; 411 the printing press 01 , Then these nozzles are the printheads 212 ; 412 as the at least one at least one form of print images defining component of the corresponding printing unit 200 ; 400 to watch. It is then preferred by a first printing operation by means of the at least one first printing unit 200 and more preferably by ejecting, in particular, coating agent through nozzles of printheads 212 ; 412 the at least one inkjet printing unit 211 ; 411 the printing press 01 according to the first output data, the at least one first printed total print image on the at least one printing substrate 02 generated.

In particular, before the start of a printing process in a job creation process, job data are preferably determined, for example by means of a job editor, at least partially on the basis of original image data belonging to a print job. The template image data of the print job represent, in particular, a content to be displayed on the printed product to be printed, that is to say at least one desired printed print image. The order data can For example, be defined in a jdf data format ("job definition format").

Order data related to a print job preferably contains at least data on properties of the printing material to be printed 02 and / or data on at least one coating agent to be applied and / or data on properties and / or settings of at least one dryer 301 ; 331 and / or data for at least one printed image and / or data for a transport speed of the printing material 02 and / or data about a printing press 01 and / or printing unit 200 ; 400 by means of which the printed product is to be printed. Examples of properties of the substrate to be printed 02 are the material of the printing material 02 and / or the thickness of the substrate to be printed 02 , An example of such data for at least one printed image to be applied is an overall areal coverage as a measure of an amount of ink per area which, for example, influences the change in the at least one size of the printing material 02 may have. In this case, a corresponding relationship between the applied and / or aufzutragendem volume of coating agent and the resulting area coverage should be observed. Examples of such data for at least one printed image to be applied are a format which is to have the printed printed product and / or a number and / or sequence of pages which the printed product is to have.

The printing press 01 preferably has in one embodiment at least one printing unit which does not operate according to an inkjet printing principle, but more preferably at least one fixed with respect to the printed image to be transmitted printing form, such as at least one offset printing unit and / or at least one flat printing unit and / or at least a high-pressure plant, in particular flexographic printing unit and / or at least one gravure printing unit. The at least one inkjet printing unit 211 ; 411 is used in such a case, for example, as imprinter.

Preferably, the method is characterized in that from the template image data of the at least one first complete image directly or via at least one intermediate process, for example a rasterization and / or a shift of individual pages and / or a scaling of individual pages and / or the at least one total print image and / or dividing the at least one total printing image into sections, the first output data for the ejection of coating agent through nozzles of printheads 212 ; 412 the at least one inkjet printing unit 211 ; 411 the printing press 01 to generate the at least one printed first complete print image.

Preferably, the method is characterized alternatively or additionally by the fact that the at least one printing unit 211 ; 411 an inkjet printing unit 211 ; 411 is and / or that the printing press 01 an inkjet printing machine 01 is and / or that from the stored template image data of the at least one total print image, in particular the first complete print image output data for driving nozzles of printheads 212 ; 412 the at least one first printing unit 200 the printing press 01 according to which ejection of coating agent through these nozzles of printheads 212 ; 412 for generating the at least one printed total printing image, in particular first printed total printed image is made and / or that the respective output data drive data of each nozzle to be used by printheads 212 ; 412 at least one inkjet printing unit 211 ; 411 the printing press 01 are. Preferably, the stored data in a data memory of the printing press 01 stored, for example, the at least one image data memory 601 and / or the at least one raster data memory 602 ,

LIST OF REFERENCE NUMBERS

01

 Printing Machine, Inkjet Printing Machine, Rolling Printing Machine, Rolling Inkjet Printing Machine, Rotary Printing Machine, Rolling Rotary Printing Machine, Rolling Rotary Inkjet Printing Machine

02

 Substrate, substrate web, paper web, textile web, film, plastic film, metal foil

100

 Substrate source, roll-off device, reel splicer

101

 printing material

200

 Printing unit, first

201

 Central pressure cylinder, central cylinder, first; Rotation body, third

207

 Rotation axis (201)

208

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

209

210

211

 Printing unit, inkjet printing unit, inkjet printing unit, four-color printing unit, first

212

 Printhead, inkjet printhead, first

213

 Nozzle bar, first

300

 dryer unit

301

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

331

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

400

 Printing unit, second

401

 Central pressure cylinder, central cylinder, second; Rotation body, fifth

408

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

409

410

411

 Printing unit, inkjet printing unit, inkjet printing unit, four-color printing unit, second

412

 Printhead, inkjet printhead, second

500

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

600

 Print data processing device, print data processing

601

 Image data storage, data storage, first

602

 Raster data storage, data storage, second

603

 Raster image processor

604

data mapping 604 , Image data mapping 604 , Raster data assignment 604

605

606

607

608

 input device

609

 Data line, Ethernet cable, first

610

611

 Calculator, image data calculator

612

 Calculator, raster data calculator

613

 Data line, second

614

 Switching device, synchronization device

615

616

 Switching device, data processing, data synchronization

617

 Signal source, rotation angle sensor, rotary encoder, absolute value encoder, setpoint data, first

618

 Signal source, rotation angle sensor, setpoint data, second

619

 register sensor

620

621

Switching device, signal converter ( 619 )

622

Printhead control ( 212 ; 412 )

A

 Direction, axial

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 2202081 A1 [0009]
• DE 102011076899 A1 [0009]

Cited non-patent literature

• DIN 16544 [0004]

Claims (12)

Method for producing at least two color separations for at least one printing operation with at least one printing machine ( 01 ) from original image data of at least one print image to be printed, wherein the at least one printing press ( 01 ) at least one print head ( 212 ; 412 ), which in each case has nozzles for the ejection of coating agent, and wherein, during the production of the at least two color separations, a total volume of coating agent per surface of a printing substrate (depending on the at least two color separations) ( 02 ) is taken into account. A method according to claim 1, characterized in that the at least two color separations for controlling nozzles of at least one Druckköpfs ( 212 ; 412 ) serve and / or are usable. A method according to claim 1 or 2, characterized in that each nozzle is associated with exactly one color separation and / or will and / or these nozzles serve and / or be used to eject coating agent in the form of drops. Method according to claim 1, 2 or 3, characterized in that each color separation contains information which itself serves as output data for controlling a plurality of nozzles of at least one print head ( 212 ; 412 ) and / or are usable and / or from which such output data can be derived. A method according to claim 1, 2, 3 or 4, characterized in that at least one of the color separations contains information by which a given drop volume of coating agent is individually and clearly defined and / or fixable for each ejected to create the print image drops The method of claim 1, 2, 3, 4 or 5, characterized in that in the preparation of the at least two color separations depending on the at least two color separations total volume of coating agent per surface of a printing substrate ( 02 ) is taken into account such that only color structures are created that exceed a maximum permissible total volume of coating agent per surface of the printing substrate ( 02 ) exclude. A method according to claim 6, characterized in that the maximum permissible total volume of coating agent per surface of the printing substrate ( 02 ) is determined before the color separations are drawn up and / or that and / or that the maximum permissible total volume of coating agent per surface of the printing substrate ( 02 ) depending on a nature of the at least one print head ( 212 ; 412 ) and / or a condition of at least one coating agent used and / or to be used and / or a condition of at least one printing material used and / or to be used ( 02 ) and / or will. The method of claim 1, 2, 3, 4, 5, 6 or 7, characterized in that is used in the preparation of the at least two color separations on at least one stored record in which a relationship between a surface coverage and a volume of coating agent to be applied per Surface of the substrate ( 02 ) is deposited. Method according to claim 8, characterized in that the at least one stored data set is and / or has at least one table and / or at least one curve and / or at least one database and / or that the at least one stored data set depends on a condition of the at least one Printhead ( 212 ; 412 ) and / or a condition of at least one coating agent used and / or to be used and / or a condition of at least one printing material used and / or to be used ( 02 ) is calculated and / or modified and / or selected and / or selected from a number of stored records. A method according to claim 8 or 9, characterized in that is used in the preparation of the at least two color separations on at least one stored record per color separation, in each case a relationship between a surface coverage and a volume to be applied by the color separation corresponding coating agent per surface of the substrate ( 02 ) is deposited. Method for printing at least one printed image by means of at least one printing machine ( 01 ), characterized in that at least two color separations are produced in a method according to claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 and that by means of the nozzles of the at least one print head ( 212 ; 412 ) of the at least one printing machine ( 01 ) Coating agent on at least one printing substrate ( 02 ) is applied. A method according to claim 11, characterized in that the at least two color separations by means of at least one data processing ( 600 ) of the at least one printing machine ( 01 ) to be created.

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