EP2191968B1 - Procédé et dispositif de contrôle préalable d'un produit d'impression multicolore à imprimer à l'aide de plusieurs formes d'impression dotées de diverses couleurs d'impression - Google Patents

Procédé et dispositif de contrôle préalable d'un produit d'impression multicolore à imprimer à l'aide de plusieurs formes d'impression dotées de diverses couleurs d'impression Download PDF

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Publication number
EP2191968B1
EP2191968B1 EP09014203.5A EP09014203A EP2191968B1 EP 2191968 B1 EP2191968 B1 EP 2191968B1 EP 09014203 A EP09014203 A EP 09014203A EP 2191968 B1 EP2191968 B1 EP 2191968B1
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EP
European Patent Office
Prior art keywords
printing
colour
press
proof
image data
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Application number
EP09014203.5A
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German (de)
English (en)
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EP2191968A1 (fr
Inventor
Wilfried Lippek
Michael Walter Ulrich
Ehud Zohar
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Hell Gravure Systems GmbH and Co KG
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Hell Gravure Systems GmbH and Co KG
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F5/00—Rotary letterpress machines
    • B41F5/20—Rotary letterpress machines specially adapted for proof printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0027—Devices for scanning originals, printing formes or the like for determining or presetting the ink supply

Definitions

  • the invention relates to a method and a device for the preliminary checking of a multicolored printed product to be printed by means of a plurality of printing forms with different printing inks according to the preamble of claims 1 and 3, respectively.
  • a plurality of individual printing forms are produced, usually in the form of printing cylinders, with the aid of which a substrate of the printed product is subsequently printed in succession with a plurality of different printing inks.
  • This preliminary check usually consists of first producing a digital multi-color proof in a proofing device with a color monitor or a color printer from the data of master copies of all the printing cylinders of the color set, for example engraved printing cylinders from the image data Proof is displayed on the color monitor or printed as a hard proof on the color printer and then reviewed.
  • a multi-color proofs composed of all extract colors cyan, magenta, yellow and black as well as any spot colors
  • a monochrome proof can be generated from a single separation color and / or spot color by selecting the appropriate data for the artwork.
  • a so-called proof (wet proof) generated before the printing cylinder for the production of the printed product go into the mail merge.
  • proof wet proof
  • packaging printing drum-type printing machines are often used for this purpose with a substrate cylinder on which a substrate to be provided with the pressure is clamped before each printing cylinder of the color set individually inserted one after another in the press and aligned to the pull-out colors and any special colors successively and on top of each other to print on the substrate.
  • the multicolor proof produced thereby is then visually inspected and compared with the multicolor digital proof to determine engraving errors, layout deviations or the like.
  • the DE 10 2005 059 656 A1 a printing machine with a device for quality control of printed matter, wherein the device comprises a recording device for receiving image data of the printed matter moved by the printing press and an evaluation device connected downstream of the recording device for processing the recorded image data.
  • the device comprises a recording device for receiving image data of the printed matter moved by the printing press and an evaluation device connected downstream of the recording device for processing the recorded image data.
  • a mask sheet which has been printed using a special mask printing plate in the printing press and reproduces the areas of the printed matter to be inspected can be scanned in the receiving device.
  • the present invention seeks to provide a method and an apparatus of the type mentioned, which no or little manual activities and a small amount of time are required for the preliminary check, so that pressure-relevant deviations are recognizable and thus preferably at the same time the quality of Vorab phenomenon can be improved.
  • the inventive method is characterized in that at least a portion of the printing forms a monochrome proof is generated, that the monochrome proof is scanned to produce digital image data of monochrome proof, and that the digital image data of the monochrome An horrs evaluated computerized are, while the inventive device is characterized by a proofing machine that produces a monochrome pressure of at least a portion of the printing forms of the color set, a monochrome or gray scanner that scans the monochrome pressure and digital image data of monochrome An horrs generated, and a computer , which evaluates the digital image data of monochrome proof.
  • each a monochrome proof is generated that the monochrome proofs are then individually scanned with the scanner to produce digital image data of the monochrome proofs, and that the digital image data of the monochrome proofs are automatically evaluated.
  • the device according to the invention preferably comprises a printing machine for producing monochrome proofs of at least two of the printing plates using a single proof ink, a scanner for scanning the monochrome proofs and for generating digital image data of the monochrome proofs, and a computer for evaluating the digital Image data of the monochrome proofs.
  • the proof or proofs are produced on a substrate, preferably on a standardized substrate, which is used for all proofs and therefore does not have to be changed.
  • a web-shaped substrate is used, which is automatically fed from a supply roll of the press machine to a printing press introduced into the printing press and moved to the printing with the associated pressure to the printing plate from the press machine out to the scanner can automatically scan it immediately after printing and then evaluate the generated during scanning digital image data in the computer.
  • an arcuate substrate may be used.
  • the printing ink used is preferably matched to the substrate and thereby advantageously formulated in such a way that different printing characteristics of the printing inks commonly used in the case of printing are optimally simulated, but the printing ink expediently provides a wider density spectrum than these printing inks.
  • the monochrome proofs are advantageously produced in a single press machine, which is successively populated with each of the several printing forms of each color set.
  • the production of monochrome proofs in the press machine is preferably carried out automatically, for example by the web-shaped substrate is fed from the supply roll to the pressure cylinder just placed in the pressure cylinder and brought into abutting contact along a peripheral surface portion with this in contact pressure molds in the form of a printing cylinder after previously the Applied pressure paint on a part of the peripheral surface and expedient has been stripped off by means of a squeegee excess paint.
  • the doctor blade is advantageous to different radii of curvature of the printing cylinder adaptable and expediently supported on both sides of an engraved surface on this.
  • the printing cylinders can be driven in rotation or rotated by the advancement of the web-shaped substrate in order to generate the respective pressure on the substrate.
  • the printing plates are preferably cleaned directly after the generation of Antik before their removal from the pressure machine in this itself, preferably by means of a in the Compression machine integrated cleaning device, which advantageously comprises at least one relative to the printing plate relative movable and acted upon by a pressurized cleaning medium cleaning nozzle and a squeegee for stripping adhering cleaning medium.
  • the scanner is preferably a high resolution scanner located behind the proofing machine adjacent to the path of travel of the substrate to scan each of the monochrome proofs on the substrate.
  • the substrate is advantageously provided in front of or behind the scanner with a label which is conveniently printed by means of a computer-controlled inkjet printer in the vicinity of each An horrs on the substrate.
  • a further preferred embodiment of the invention provides that the computer-aided comparison of the digital image data of each print produced with the scanning with the digital data of an associated printing form template aligning the image contents of the respective data with respect to each other (montage), a comparison of color separations of the two data, optionally after a transformation of different resolutions, as well as a translation of the digital image data generated during the scanning of each proof into print data or a translation of their gray values into the desired color values of a Print deceased color system through a color management program includes.
  • the digital image data of two or more proofs also suitably generates multicolor soft and / or hard proofs by displaying the digital image data translated into a color system on a monitor or printing it on a printer, using each other to produce multicolor proofs are superimposed register-true.
  • the production of monochrome proofs of individual proofs is also possible.
  • the device shown in the drawing is generally used in packaging printing, where an existing example of a film, paper or cardboard web or sheet substrate successively gravure on several consecutively arranged in a printing machine engraved printing cylinders with different inks, such as cyan, magenta , Yellow and black are printed, which are superimposed on each other for the production of the printed product.
  • inks such as cyan, magenta , Yellow and black
  • the apparatus comprises for this purpose an automatic printing machine 2, in which successively on each of the engraved printing cylinder 4 of a color set with the same proof on a web-shaped substrate 6 a monochrome proof is generated, one arranged in the direction of movement of the substrate 6 behind the platen 2 Scanner 8, which scans one after the other in the direction of movement on the substrate 6 consecutively automatically to generate digital image or scan data from each proof, connected via a data line 10 to the scanner 8 computer 12, the image or scan data each An horrs for evaluation with engraving data of the pressure cylinder used for generating the An horrs 4 compares, and arranged in the direction of movement of the substrate 6 behind the scanner 8 smaller printer 14.
  • the web-shaped substrate 6 is wound on a supply roll 16 of the pressure machine 2 and is after its passage through the pressure machine 2 on a arranged in the direction of movement of the substrate 6 behind the scanner 8 and the printer 14 controlled driven take-up reel 18 wound, which also provides for the advancement of the substrate 6.
  • the press machine 2 further has the task of automatically supplying the impression ink to a printing cylinder 4 inserted therein before the generation of the proof, distributing it uniformly on the engraved peripheral surface 20 of the printing cylinder 4 and removing the excess proof ink, and the printing cylinder 4 after the production of the Pressure automatically clean before it is removed from the pressure machine 2 and another pressure cylinder 4 is inserted into the pressure machine 2.
  • the pressure machine 2 comprises a housing 22 from which the supply roll 16 partially protrudes, a housing 22 arranged in the holder 24, in each of which one of the impression cylinder 4 can be rotatably inserted about its longitudinal axis, a plurality of guide and pressure rollers 26, 28, 30, with which the substrate 6 can be fed from the supply roll 16 to the pressure cylinder 4 inserted in the printing cylinder 2 and pressed against the peripheral surface 20 of the printing cylinder 4, one with one of a plurality of storage containers 32 for the printing ink connectable paint application device 34 for application the printing ink on the inserted into the holder 24 printing cylinder 4 of the color set, a squeegee 36 for stripping the excess pressure ink from the peripheral surfaces 20 of the printing cylinder 4, and a cleaning device 38 for cleaning the printing cylinder 4 after the pressure and before removal from the pressure machine. 2 ,
  • the substrate 6 is a standard substrate, for example a white paper material, which is optimized for the respective proof ink or adapted to the proof ink.
  • the holder 24 is movable in the direction of a longitudinal axis of the printing cylinder 4 so that it can be moved out of the housing 22 for removal of a cleaned after use printing cylinder 4 and for inserting a new printing cylinder 4 forward or backward.
  • the guide and pressure rollers 26, 28 are within the housing 22 in the direction of the double arrows A in Fig. 2 movable to press the substrate 6 after retraction of the holder 24 in the housing 22 against a peripheral portion 40 of the inserted into the holder 24 pressure cylinder 4.
  • the inking device 34 comprises a plurality of inking nozzles (only one shown) 42, in the direction of rotation of the printing cylinder 4 (arrow B in FIG Fig. 2 ) are arranged in front of its abutting against the substrate 6 peripheral portion 40 in the housing 22.
  • the inking nozzles 42 arranged next to one another in the axial direction of the printing cylinder 4 can work together in the direction of the double arrow C in FIG Fig. 2 approaching the peripheral surface 20 of the printing cylinder 4 and automatically moved along the peripheral surface 20 during rotation thereof to apply the printing ink from the storage container 32 through the inking nozzle 42 connected to this storage container 32 to the entire peripheral surface 20 and uniformly with the proof ink to wet.
  • an inking device can be used, with each of which one of the printing inks can be poured onto the surface 20 of the printing cylinder 4.
  • the storage container 32 In order to avoid that the storage container 32 must be cleaned, if for a different substrate 6, for example, a more absorbent substrate, or for a printing ink with a different composition, such as a water- or solvent-based ink, the proofing ink must be changed, the Pressing machine 2 more storage containers 33 for An horrlich, which can be selectively connected to the inking nozzles 42.
  • the printing ink used for all printing cylinders (1) of a color set can be any color whose graduated printing densities or tonal values can be detected by the scanner 8 with high resolution.
  • the proof ink may preferably be gray.
  • the printing ink is matched to the substrate 6 used so that it produces a wider density spectrum on this than is the case with the combination of printing inks and substrate during the mail merge of the multicolored printed product. Due to the greater sensitivity in the Printing in comparison to the mail merge can achieve particularly good results when translating the image or scan data generated by the scanner 8 into print data of the mail merge by means of a color management program.
  • doctor blade 36 extends over the entire length of the inserted into the holder 24 pressure cylinder 4 and can in the direction of the double arrow D in Fig. 2 be approximated to the contact with the peripheral surface 20 to the impression cylinder 4, wherein it is supported to avoid damage to the front ends of the printing cylinder 4.
  • the cleaning device 38 is arranged in the direction of rotation of the printing cylinder 4 behind the voltage applied to the substrate 6 peripheral portion 40 and includes a further doctor blade 44, in the direction of the double arrow E in Fig. 2 can be approximated to the peripheral surface 20 of the printing cylinder 4 and serves for stripping residual print ink from the peripheral surface 20, and a high-pressure cleaner for cleaning the peripheral surface 20 with a cleaning medium consisting of hot water and steam, comprising a cleaning nozzle 46.
  • the cleaning nozzle 46 can for cleaning the peripheral surface 20 in the direction of the double arrow E in Fig. 2 to be approximated and moved in the axial direction along the peripheral surface to spray the cleaning medium under high pressure on the peripheral surface 20.
  • a drip pan 48 is arranged for collecting the dripping contaminated cleaning medium.
  • the substrate 6 by lifting the guide and pinch rollers 26, 28 in the in Fig. 2 moved in dotted lines position in which it is lifted from the peripheral surface 20 of the printing cylinder 4 in order to protect it from contamination. Possibly. Can be used for cleaning between the lifted Substrate 6 and the peripheral portion 40 is still an intermediate wall (not shown) retracted.
  • the scanner 8 is arranged in the direction of movement of the substrate 6 behind an outlet opening 50 of the housing 22 on the previously printed side of the substrate 6 to scan each scan immediately after its exit from the housing 22 line by line transversely to the direction of movement or scan.
  • the scanner 8 is a high-resolution monochrome or gray scanner which, when scanning each monochrome proof, generates digital image or scan data which are transmitted to the computer 12 for evaluation by the data line 10, as in FIG Fig. 1 shown.
  • the image or sample data i. the gray values of the printing ink detected during scanning in the scanner 8 are translated by a suitable image processing program into tone values of the separation color cyan, magenta, yellow or black associated with the respective printing cylinder before they are compared with the engraving data 52 supplied to the computer 12 by that impression cylinder 4 with which previously the sensed pressure has been generated.
  • the translated image or scan data and the associated engraving data 52 are aligned in relation to one another in a first mounting step, so that corresponding pixels of the contact pressure of a printing cylinder 4 and a gravure of the printing cylinder 4 underlying printing template coincide.
  • a second comparison step the translated image or scan data of each print and the associated engraving data 52 are compared pixel by pixel to determine deviations between the pixels of the proof and the corresponding pixels of the print original.
  • This step can be used to compensate for different resolutions Transformation of the resolution of the scan data or the engraving data generated from the artwork include.
  • the translated image or scanning data of the proof are processed in a third processing step with a color management program.
  • the color management program translates color spaces of the separation colors into the color spaces of the inks used for the serial printing. Since Color Management programs and their operation are well known in the art, they should not be further described here.
  • this proof may be imaged as a soft proof 54 on a color monitor 56 of the computer 12 or printed out on a substrate as a hard proof 58 by means of a printer 60, such as an ink jet printer, preferably on the substrate intended for the printed product.
  • a printer 60 such as an ink jet printer, preferably on the substrate intended for the printed product.
  • a color management program is also preferably used.
  • the multicolored proof produced from the image data substantially corresponds to the multicolor proof produced in the beginning, which is produced in a conventional printing machine.
  • single-color proofs can also be generated from the image or scan data of individual proofs.
  • the computer 12 or a system consisting of a plurality of engraving machines 68 serving for engraving the printing cylinders 4 and the device described above for checking the printed product may interface with a status manager 62 from which further processed or corrected data 66 are sent to the customer 64 of the printing operation can be transmitted.
  • the device described above, as well as the method described above, can be used not only for preliminary testing of printing cylinders 4 in gravure printing but also in flexographic printing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Methods (AREA)

Claims (14)

  1. Procédé pour l'examen préalable d'un produit imprimé multicolore devant être imprimé avec des encres de couleurs différentes au moyen de plusieurs plaques d'impression, caractérisé en ce qu'une impression monochrome est générée à l'aide d'au moins une partie des plaques d'impression (4), en ce que l'impression monochrome est échantillonnée pour générer des données d'images numériques de l'impression monochrome, et en ce que les données d'images numériques de l'impression monochrome sont évaluées.
  2. Procédé selon la revendication 1, caractérisé en ce qu'une impression monochrome est respectivement générée avec au moins deux plaques d'impression (4) par utilisation d'une encre d'impression unique, en ce que les impressions monochromes sont échantillonnées individuellement pour générer des données d'images numériques des impressions monochromes, et en ce que les données d'images numériques des impressions monochromes sont évaluées.
  3. Dispositif destiné à l'examen préalable d'un produit imprimé multicolore devant être imprimé avec des encres de couleurs différentes d'un jeu de couleurs au moyen de plusieurs plaques d'impression, caractérisé par une machine d'impression (2) qui génère une impression monochrome d'au moins une partie des plaques d'impression (4) du jeu de couleurs, par un numériseur monochrome ou gris (8) qui échantillonne l'impression monochrome et génère des données d'images numériques de l'impression monochrome, et par un calculateur (12) qui évalue les données d'images numériques de l'impression monochrome.
  4. Dispositif selon la revendication 3, caractérisé en ce que la machine d'impression (2) génère des impressions monochromes d'au moins deux plaques d'impression (4) par utilisation d'une encre d'impression unique, en ce que le numériseur (8) échantillonne les impressions monochromes et génère des données d'images numériques des impressions monochromes, et en ce que le calculateur (12) évalue les données d'images numériques.
  5. Dispositif selon l'une quelconque des revendications 3 ou 4, caractérisé en ce que le calculateur comprend des moyens destinés à comparer des données d'images numériques de chaque impression monochrome avec des données numériques d'un modèle de plaque d'impression utilisé pour réaliser la plaque d'impression associée (4).
  6. Dispositif selon l'une quelconque des revendications 3 à 5, caractérisé en ce que le calculateur (12) convertit les données d'images numériques de chaque impression monochrome en des données d'images numériques d'une couleur extraite du cylindre d'impression associé.
  7. Dispositif selon l'une quelconque des revendications 3 à 6, caractérisé en ce que la machine d'impression (2) comprend une réserve (16) d'un substrat (6) destiné aux impressions monochromes ainsi que des moyens (18, 26, 28, 30) destinés à introduire le substrat (6) de la réserve vers une plaque d'impression (4) placée dans le machine d'impression (2) .
  8. Dispositif selon l'une quelconque des revendications 3 à 7, caractérisé en ce que la machine d'impression (2) comprend un dispositif d'application d'encre (34) destiné à appliquer automatiquement l'encre d'impression sur une plaque d'impression (4) placée dans le machine d'impression (2).
  9. Dispositif selon la revendication 8, caractérisé en ce que le dispositif d'application d'encre (34) comprend une pluralité de buses d'application d'encre (42) et/ou une racle (36).
  10. Dispositif selon l'une quelconque des revendications 3 à 9, caractérisé en ce que la machine d'impression (2) comprend un dispositif de nettoyage (38) destiné à nettoyer la plaque d'impression (4).
  11. Dispositif selon la revendication 10, caractérisé en ce que le dispositif de nettoyage (38) comprend au moins une buse de nettoyage (46) pouvant être exposée à un agent de nettoyage sous pression et/ou une racle (44).
  12. Dispositif selon l'une quelconque des revendications 3 à 11, caractérisé par une cuve de réception (48) disposée sous la plaque d'impression (4) dans le machine d'impression (2).
  13. Dispositif selon l'une quelconque des revendications 3 à 12, caractérisé en ce que le numériseur (8) est un numériseur à haute résolution.
  14. Dispositif selon l'une quelconque des revendications 3 à 13, caractérisé par une imprimante (14) disposée à l'intérieur du numériseur (8).
EP09014203.5A 2008-12-01 2009-11-13 Procédé et dispositif de contrôle préalable d'un produit d'impression multicolore à imprimer à l'aide de plusieurs formes d'impression dotées de diverses couleurs d'impression Active EP2191968B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008059759A DE102008059759B4 (de) 2008-12-01 2008-12-01 Verfahren zum Vorabprüfen eines mittels mehrerer Druckformen mit verschiedenen Druckfarben zu druckenden mehrfarbigen Druckerzeugnisses

Publications (2)

Publication Number Publication Date
EP2191968A1 EP2191968A1 (fr) 2010-06-02
EP2191968B1 true EP2191968B1 (fr) 2017-09-13

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EP (1) EP2191968B1 (fr)
DE (1) DE102008059759B4 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012106981A1 (de) 2012-07-31 2014-02-06 Eltromat Gmbh Verfahren zur Prüfung des Druckergebnisses bei Rotationsdruckmaschinen
DE102017105704B3 (de) * 2017-03-16 2018-08-02 Saueressig Gmbh + Co. Kg Verfahren zur Überprüfung einer Druckform, insbesondere eines Tiefdruckzylinders

Citations (4)

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Publication number Priority date Publication date Assignee Title
DE102005059656A1 (de) 2005-12-14 2007-06-21 Man Roland Druckmaschinen Ag Druckmaschine, insbesondere Bogendruckmaschine
DE102006050274A1 (de) 2006-10-23 2008-05-29 Hell Gravure Systems Gmbh & Co. Kg Verfahren und Vorrichtung zur Überprüfung der Qualität wenigstens eines Druckformzylinders und eine mit einer solchen Vorrichtung ausgerüstete Fertigungslinie
DE102007007626A1 (de) 2007-02-16 2008-08-21 Schorsch, Claus Peter Verfahren und Vorrichtung zur Überwachung der Druckparameter einer Druckmaschine
DE102008021447A1 (de) 2008-04-29 2009-11-05 Manroland Ag Verfahren zum Betreiben einer in eine Rollendruckmaschine integrierten Bearbeitungseinrichtung

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JP2004246110A (ja) * 2003-02-14 2004-09-02 Dainippon Screen Mfg Co Ltd 検版装置、印刷システム、印刷データの検版方法、およびプログラム
DE102007047086A1 (de) * 2006-10-26 2008-04-30 Heidelberger Druckmaschinen Ag Druckplattenerzeugung für Aniloxdruckmaschinen

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DE102005059656A1 (de) 2005-12-14 2007-06-21 Man Roland Druckmaschinen Ag Druckmaschine, insbesondere Bogendruckmaschine
DE102006050274A1 (de) 2006-10-23 2008-05-29 Hell Gravure Systems Gmbh & Co. Kg Verfahren und Vorrichtung zur Überprüfung der Qualität wenigstens eines Druckformzylinders und eine mit einer solchen Vorrichtung ausgerüstete Fertigungslinie
DE102007007626A1 (de) 2007-02-16 2008-08-21 Schorsch, Claus Peter Verfahren und Vorrichtung zur Überwachung der Druckparameter einer Druckmaschine
DE102008021447A1 (de) 2008-04-29 2009-11-05 Manroland Ag Verfahren zum Betreiben einer in eine Rollendruckmaschine integrierten Bearbeitungseinrichtung

Non-Patent Citations (2)

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Title
CHRISTIAN BERCHT ET AL: "Tiefdruck heute", 1976, pages: 205 - 206, XP055500557
HELMUT KIPPHAN: "Handbuch der Printmedien", 2000, pages: 511-512, 532 - 540, 546-552, XP055500560

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DE102008059759A1 (de) 2010-06-02
EP2191968A1 (fr) 2010-06-02

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