EP1916100A1 - Production de plaque de pression pour presses anilox - Google Patents

Production de plaque de pression pour presses anilox Download PDF

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Publication number
EP1916100A1
EP1916100A1 EP07117453A EP07117453A EP1916100A1 EP 1916100 A1 EP1916100 A1 EP 1916100A1 EP 07117453 A EP07117453 A EP 07117453A EP 07117453 A EP07117453 A EP 07117453A EP 1916100 A1 EP1916100 A1 EP 1916100A1
Authority
EP
European Patent Office
Prior art keywords
printing
correction values
image
printed
printing form
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP07117453A
Other languages
German (de)
English (en)
Other versions
EP1916100B1 (fr
Inventor
Jürgen Dr. Rautert
Günter Dr. Bestmann
Manfred Dr. Jurkewitz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP1916100A1 publication Critical patent/EP1916100A1/fr
Application granted granted Critical
Publication of EP1916100B1 publication Critical patent/EP1916100B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/10—Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1075—Mechanical aspects of on-press plate preparation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/70—Forming the printing surface directly on the form cylinder

Definitions

  • the present invention relates to a method and a device for producing at least one printing form for a printing method on a printing machine, wherein a first printing form is produced on the basis of first image data and with this printing form a printed image is printed on a printing material.
  • a corresponding printing press is in the EP 0 870 609 A2 described.
  • a printing machine with anilox roller ie anilox roller, applicator roller, plate cylinder and inking system is hereby fully incorporated by reference.
  • the supply of ink is set in zones by means of a color zone control.
  • the color density and in particular the tonal value of the printed image in the corresponding zones during printing can be regulated.
  • the control of the zone screws which regulate the amount of ink is regulated in general according to the current state of the art as a function of the printing originals for the different printing inks.
  • the printing inks cyan, magenta, yellow and black (CMYK) are generally used in four-color printing.
  • the printed originals separated by printing inks are also called color separations.
  • the artwork will usually be screened and exposed with an imagesetter on the printing plates. In the past, the film exposure was planned as an intermediate step.
  • the page description languages PostScript (PS) and PDF (portable document format) are widely used as data formats for describing the print templates.
  • the separated print templates are rasterized in a raster image processor (RIP) and converted into a corresponding matrix or bitmap.
  • the individual pixels corresponding to the imagesetter resolution are each assigned a value as a function of the gray value to be achieved. This assignment is generally based on a threshold range. For example, For example, a grid cell may be assigned a number of pixels. Depending on the gray value of the corresponding printing original, a number of pixels assigned to this gray value is then exposed and in this way a halftone dot corresponding to the gray value is imaged.
  • the image data takes values 0 or 1, depending on whether the pixels are imaged or not.
  • a plurality of exposed pixels or raster dots on a printing plate represent a corresponding pixel and depending on the number of exposed dots, a gray value corresponding to the gray value of the original pixel of the original is displayed.
  • the platesetter used and the printing press used there is a change in the actual tonal value which is printed by the printing press on a substrate.
  • the ink keys are automatically adjusted to match the resulting print image on the substrate Tonwert is generated, which comes as close as possible to the desired.
  • the printer is also free to regulate the amount of ink via the ink zone control in the individual ink zones so that he can regulate the color density and the tonal values within limits within the ink zones even after the exposure of the printing plates.
  • a corresponding method to control the area coverage of a printing plate and the amounts of ink in the printing press is in the DE 10201918 A1 which is hereby incorporated by reference.
  • the printer therefore has no options, in certain areas which can also correspond to ink zones to regulate the amount of ink and thus to manipulate the printed color density or the tonal value on the substrate.
  • a manipulation of the color densities over an area which is not identical with ink zones or even extends to serve transversely is not possible even in printing machines which have ink zones.
  • the object of the present invention is therefore to provide a method and a device with which it is possible for a printer, the color density or the tone value in a resulting print image on a substrate even after the exposure of a first printing plate within a printing machine, in particular one to manipulate colorless printing press.
  • area-wise correction values are to be generated in the region of the printing press. These correction values are then to be used for the correction of the printing originals on which the printing is based and / or the rastered image data, and based on at least these correction values, at least one second printing form should be produced.
  • correction values z. B. to desired changes in the tone values or color densities in a particular area of the printed image act.
  • these correction values are used to correct the print templates corresponding to these colors.
  • the printed print image is displayed on a monitor and areas to be marked and / or selected for the correction values to be generated.
  • z. B the printed image on the substrate to be scanned and then displayed on a monitor. Then in the selected areas or in the marked areas Correction values are generated which correspond there to desired new tone values or color densities.
  • Areas that can be marked z. B. certain objects, such. B. houses or people or places within a printed image. Such a mark can z. B. be entered via a touch screen of the monitor or generated via an automatic detection of objects within the print image.
  • the selectable regions are provided in the manner of zones extending in the printing direction over at least the entire printed image. These zones can advantageously correspond to the color zones known to the printer. You can then z. B. 32.5 mm wide and a change in tone or color densities in the individual ink zones can be made by a printer in the manner known to him as to adjust the ink keys, instead of then set ink fountain keys it comes to generating corresponding correction values in this marked area.
  • these selectable areas are provided on the monitor as structures overlapping the illustrated print image.
  • these interfaces within the printed image are automatically detected and provided as correspondingly selectable areas.
  • the printed image shown is subdivided into zones and the zones are made up of at least three bands running longitudinally over the entire printed image.
  • a coarse adjustment in the zones shown can first be made and finer correction values for the individual bands can be set.
  • the correction values can always act more easily over the entire zone and additive via the corresponding bands.
  • These bands can either be displayed or else be deposited only for the manipulation of the tonal values or color densities.
  • the correction values are band-wise adapted to the adjacent zones, so that an adapted course results from one zone to the adjacent zones.
  • this course is adjustable. An operator is thus provided with a means by which he can achieve a visually appealing course over the entire width of a printed sheet.
  • the printed image shown is divided longitudinally into adjacent segments.
  • a mark or a selection of certain objects within the printed image is not limited to longitudinal zones but it can be easily selected areas that are within the printed image and complete be enclosed by an interface. With a corresponding marking or selection of such a region, then all segments are selected which lie within this range. For segments that are only partially within this range, it may then be provided that corresponding correction values are adapted to their proportion of that lying in the border region.
  • the correction values of the segments of the selected region are adapted to the limits of the region to the segments adjoining from the outside.
  • this adjustment should be advantageously adjustable.
  • the width of the boundary region in which a corresponding adjustment is also to be adjustable In this way, a particularly smooth course from a selected object or area to the areas outside of the selected object can take place.
  • these correction values or correction data can be generated in the area of the printing press by a user.
  • this correction data is transferred to a raster image processor (RIP) or a printing form production device.
  • RIP raster image processor
  • the print templates or the rastered image data can then be adapted according to the specifications of the user.
  • the RIP or the printing plate generating device the rastered image data or the objects underlying the image data are corrected according to the correction values and then optionally after a rastering the corrected image data passes back to the printing machine and that on the basis of this corrected image data, an image of a corrected printed image is displayed.
  • This can be z. B. be done so that only the data for the marked area are corrected and transferred back and then these corrected image data are placed on the imaged print image.
  • different transparencies of the overlapping printed image can be set. It can also lead to a complete replacement of the printed image shown at least in regions by the corrected image data.
  • a user then has the option of very quickly by the communication of the printing press with the printing form stage d. H. with the rip or directly with a platesetter to see the results of its correction.
  • a further rip which may be embodied in terms of hardware or software, is provided at least for the representation of the corrected data of the printed image.
  • the printer When using conventional ink zones within a printing press, it is possible for the printer to reduce or increase the intended amount of ink within predetermined limits.
  • this over-coloration can be taken into account, thus, by correcting the screening during the production of the second printing form, it is also possible to realize an increase in the amount of ink over the screening.
  • the changes made to the printed image on the press can be correction values that are either absolute values of individual pixels or halftone dots, or correction values can be generated that represent the relative changes of particular pixels or halftone dots. These values can then be transferred from the printing press back to the pre-press and used there to generate another printing form.
  • the printing process is an anilox printing process.
  • the presented process for the production of printing plates can be used particularly favorably.
  • the printing form is a printing plate and that a printing platesetter separate from the printing machine is used as the printing plate production device. It does not matter where the printing platesetter is located.
  • the print image can then be processed directly on the printing press, the generated correction values are sent back to the precursor, ie they are transferred to the printing plate setter and a special need to provide this printing plate setter in the vicinity of the printing press is not required.
  • a great deal of flexibility is achieved.
  • test forms should advantageously have control wedges, which are each assigned to one area.
  • z. B. may be a zonal area described above.
  • correction values based on these detected irregularities are created and these correction values can be from the press to the RIP or the printing plate forming device d.
  • H. be transferred to the platesetter and then considered at least in the production of the first printing form. This consideration can be carried out in such a way that a corresponding local correction of the image data or of the halftone dots is already applied during the generation of the first printing form.
  • a printing system comprising at least one printing press and a printing plate generating device for generating at least one printing plate for a printing method on a printing machine, wherein a first printing form is generated on the basis of first image data and with this printing form on a print image A printing material is printed to carry out the method as described above.
  • This printing system is characterized in that it is in the printing press to a colorless printing machine z.
  • B. is an anilox in particular an anilox printing machine
  • the other is a screen provided on this screen, the printed image to be displayed
  • marking organs which are suitable for marking selected areas of the printed image shown and it should continue to be provided switching elements for setting correction values within the so marked areas.
  • the printing form production device should be a printing platesetter, the printing platesetter and / or the printing machine having a raster image processor (RIP).
  • Return lines are to be provided for transferring correction values from the printing press to the plateetter and / or RIP and back to the printing press.
  • at least one confirmation element in the area of the printing press is to be provided for confirming a displayed corrected print image and / or for starting the production of a printing form on the basis of the corrected print image.
  • FIG. 1 shows an inventive printing system with an anilox printing machine 1, which has four printing units 2 in the illustrated case.
  • the printing units 2 have no ink fountain keys and have only a short inking unit at which an inked roller, the ink is transferred to a printing plate cylinder 5.
  • This is an embodiment of an already known anilox inking unit.
  • a printing plate 18 inked over the anilox roller transfers a printed image 201 onto a sheet 7 via a blanket cylinder 4.
  • the sheet 7 is passed from an feeder stack 6 through the printing press 1 along a transport path and thus enters a printing gap 19 which is accessible from the blanket cylinder 4 and a counter-pressure cylinder 3 is formed. In this nip 19, the color is transferred to the sheet 7.
  • the printing unit 2 should, as described, be an anilox work. In this case, both embodiments are possible in which a dampening unit is provided, or in which a waterless printing is to be performed.
  • the printing machine 1 shown here is therefore a sheet-fed offset printing press.
  • the printing press can be controlled from a control panel 9.
  • This control panel 9 has a monitor 12 to support the control or the control itself.
  • a complete printed image 201 has been printed on it.
  • This print image 201 can then be detected by a corresponding detection device.
  • an external sheet-fed scanner 10 is provided, on which a proof of a sheet 7 can be placed and scanned.
  • the sheet scanner 10 is connected via a transmission line 11 to the control panel 9. In this way, all the data of the sheet 7 can be transmitted from the sheet scanner 10 to the control panel 9 and shown here. This can be done for example on the monitor 12.
  • the monitor 12 as such represents the control panel 9. It can be sufficiently large to represent a complete sheet 7 and be designed as a touch screen. In this way, all inputs to control the machine directly over the surface of the monitor 12 are feasible.
  • the printing press 1 By means of controls not shown here can be operated by the control panel 9 on the one hand, the printing press 1, on the other hand, corrections to the printed image 201 can be performed.
  • various operating elements 204, 205, 206, 302, 303 can be provided. These controls can either be provided in hardware on the control panel 9, or displayed on the monitor 12.
  • the farern here is a marking member 17 is provided, with which certain areas on the printed sheet 7 shown on the monitor 12 can be marked. Via the operating elements 204, 205, 206, 302, 303, corrections can then be made in the marked areas and correction values manually set in this way. These correction values can be transmitted via a communication line 13 to a raster image processor 15 (RIP).
  • RIP raster image processor
  • This rip 15 is assigned to a printing platesetter 16 in the case shown here. It may further be that the rip is integrated directly in the printing platesetter 16 and / or provided as software on a computer.
  • the Rip 15 provides the image data available with which the platesetter 16 depending on the color separation, the printing plates 18 imaged.
  • the print templates which are assigned to the individual color separations can be adjusted to the corrected values for the print image 201. Based on these adjusted artwork, the Rip can create 15 new image data. This image data can be transmitted back to the control panel 9 via a communication line 14 and converted to the extent that corresponding changes in a resulting print image 201 are displayed on the monitor 12.
  • the image data thus generated are transferred to the printing platesetter 16.
  • a printing plate 18 corresponding to the corresponding process ink is imaged within the printing plate exposer 16. Possible further process steps for the completion of the printing plate 18 are not shown here for the sake of clarity.
  • the printing plates 18 thus produced are inserted into the individual printing units 2 of the anilox printing machine 1.
  • first sheets 7 are printed. These sheets 7 are then scanned and evaluated in a sheet-fed scanner 10.
  • This sheet-fed scanner 10 can be provided externally from the printing machine 1, or also integrated in it.
  • the picture element scanned print image 201 is displayed on the monitor 12 of a control panel 9.
  • certain areas or objects 203 may be marked or selected here and then corrected or modified in accordance with the specifications by the user.
  • correction values 102 are generated, which are transferred from the control panel 9 back to the Rip 15.
  • the Rip 15 will then create new image data based on the corrected artwork.
  • new values for the pixels of the printed image 201 which is displayed on the control panel 9 can be determined.
  • These corrected pixels or the corrected image data can be passed from the Rip 15 as corrected values 103 to the control panel 9.
  • the pixels of a corrected printed image 201 to be displayed are then calculated on the basis of the corrected image data and finally displayed on the monitor 12 of the control panel 9. If the corrected pixels of the print image 201 thus newly represented meet the requirements of an operator, he can trigger the generation of a new corrected printing plate 18 by the printing plate imagesetter 16 via a corresponding field on the control panel 9. If the corrected print image 201 now shown does not meet his expectations, then he has the option of further correction steps to better adapt the print image to his requirements. In this case, correction values 102 are repeatedly transmitted to the rip 15, which, based on this, transmits new corrected values 103 to the control panel 9.
  • the rip 15 is caused to pass the corrected image data to the platesetter 16, which then begins with the imaging of new printing plates 18.
  • the platesetter 16 which then begins with the imaging of new printing plates 18.
  • Pressure plates 18 are used.
  • These new printing plates 18 are re-used in the printing machine 1, where they replaced the original first printing plates 18.
  • Sheet 7 is again printed, which is then scanned inline or offline by a sheetfed scanner 10.
  • the new printed images 201 thus produced are displayed again on a monitor 12 of the control panel 9, and in the event that the thus corrected print image 201 still does not meet the requirements of the user, it is possible to produce new printing plates 18 according to the described method. Otherwise, with satisfactory pressure plates 18, a complete print job can be performed in the printing press 1.
  • FIG. 3 shows an example of a possible regional correction of a print image 201.
  • the scanned print image 201 is shown on a monitor 12 of the control panel 9.
  • corresponding switching elements and slider regulators 204, 205 are within a correction selection area 206.
  • the type of switching elements and slider controls within the correction selection area 206 can be selected, for example, at the control panel 9.
  • the correction selection area 206 is a color balance correction area. Accordingly, switching elements for brightness, highlights, midtones and shadows are shown here.
  • a corresponding selection via the switching elements 204 can be set more precisely by means of the slider 205.
  • the adjustment via these slider regulators 205 or switching elements 204 is applied to a marked area within the printed image 201 shown. This area can be selected directly via a marking member 17 on the monitor 12.
  • a marking 202 can be applied to the illustrated print image 201 and an object 203 can be marked.
  • the 203 a selection of a particular object.
  • B. facilitate the detection of interfaces.
  • the marking member 17 may be, for example, a stylus or a pen with which you can act directly on the monitor 12 or it may also be a trackball or a mouse, not shown here, with which you can act on the monitor 12 ,
  • the changes thus made in the marked area are again displayed on the monitor 12 as described. This can be done by replacing the originally displayed area or by superimposing the corrected area. For example, it is possible for certain hues, such as yellow, blue, green, magenta, to be reduced or increased. It may also be that a brightness change occurs in a certain marked area. In particular, the entire printed image can also be regarded as the marked area if this is selected. So changes over the entire pressure range are possible.
  • FIG. 4 shows an example of certain selectable areas that can be selected in the area of the illustrated print image 201. These selectable areas are overlaid on the print image 201. In the case illustrated here are ink zones 301, which were placed over the entire scanned and displayed print image 201.
  • These color zones 301 are symbolic of the color zones of an offset printing press with zones of color zone adjustment. This allows an operator to feel with a zoned Printing machine handle as if the color zones known to him actually.
  • the individual ink zones 301 can be adapted to the needs of a user.
  • corresponding correction values for all pixels that lie within the corresponding ink zone 301 are then generated and transferred to the rip 15.
  • the monitor display 304 additionally comprises the color zone controller 302 and a further setting and switching area 303 in addition to the illustrated printed image 201 of the sheet 7.
  • further possible setting functions for the individual ink zones or ink zone controllers 301, 302 can be provided.
  • FIG. 5 shows a representation of a color zone 301 as deposited for generating correction values 102.
  • the ink zone 301 is broken down into individual bands 401 and 402, these bands covering the entire sheet 7 in the longitudinal direction and occupying only a fraction of a color zone 301 transversely thereto.
  • the ink zone 301 can be constructed of bands of different widths 401, 402.
  • the bands 401 in the edge regions of a color zone 301 are to be narrower than the bands 402 in the middle region of a color zone 301.
  • the correction values 102 are then not generated by the end position via the color zone controller 302 for the entire color zone 301, but it will be for the individual Bands 401, 402 modified correction values 102 generated.
  • the correction values 102 for the bands 401 in the outer area of a color zone 301 are adapted to the color values of adjacent color zones 301. This may be, in particular, an adaptation to already corrected color values of the adjacent Color zones 301 act.
  • the width of this adjustment range by the bands 401 can be set up in particular via other selection controller not shown here. Multiple bands 401 may then be selected for transitioning the corrections of one color zone 301 to an adjacent color zone 301.
  • the ink zones 301 can be divided into different segments 403. Depending on the setting, these segments 403 can then be selected independently of the color zones 301 by a marking 202, as shown in FIG. 3.
  • a uniform correction it is possible for a uniform correction to be carried out for all segments 403 of a marked object 203 via a corresponding slider 205, but the correction values 102 thus generated in the region of the marking 202 itself are modified.
  • different correction values 102 result for the segments 403 which lie in the region of the marking 202 than for the segments 403 which lie within the object 203.
  • the number of segments 403 or their distance from the marking 202 is an adjustable parameter, so that a transition region from the correction of the marked object 203 to the rest of the migrating print image 201 can be set.
  • the adaptation itself d. H. adjust their strength or slope.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Quality & Reliability (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP07117453.6A 2006-10-26 2007-09-28 Production de plaque d'impression pour presses anilox Not-in-force EP1916100B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006050539 2006-10-26

Publications (2)

Publication Number Publication Date
EP1916100A1 true EP1916100A1 (fr) 2008-04-30
EP1916100B1 EP1916100B1 (fr) 2014-03-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07117453.6A Not-in-force EP1916100B1 (fr) 2006-10-26 2007-09-28 Production de plaque d'impression pour presses anilox

Country Status (4)

Country Link
US (1) US8358434B2 (fr)
EP (1) EP1916100B1 (fr)
JP (1) JP5336721B2 (fr)
CN (1) CN101168320B (fr)

Cited By (2)

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CN102256076A (zh) * 2011-07-29 2011-11-23 北京印刷学院 基于三基色无墨印刷纸的页面电视机
CN102256078A (zh) * 2011-07-29 2011-11-23 北京印刷学院 基于三色重叠无墨印刷纸的页面电视机

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DE102011015306A1 (de) * 2011-03-29 2012-10-04 Heidelberger Druckmaschinen Ag Verfahren zur Graubalancekorrektur eines Druckprozesses
US9663261B2 (en) * 2014-11-12 2017-05-30 Honeywell Limited Optimization of print layout, estimation of paperboard requirements and vendor selection based on box orders and printing machine availability
EP3564036B1 (fr) * 2018-05-03 2021-07-07 Heidelberger Druckmaschinen AG Tri automatique de plaques d'impression
DE102018216421A1 (de) * 2018-09-26 2020-03-26 Heidelberger Druckmaschinen Ag Verbesserte Druckplattenlogistik
DE102021102848A1 (de) * 2020-03-11 2021-09-16 Heidelberger Druckmaschinen Aktiengesellschaft Vom Transportwagen gesteuerter Druckplatten-Workflow

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CN101168320A (zh) 2008-04-30
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JP2008105423A (ja) 2008-05-08
US8358434B2 (en) 2013-01-22
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