EP0993947B1 - Procédé et dispositif pour mesurer optiquement la position d'impression et/ou la déviation de registre entre les différentes couleurs dans une machine à imprimer en plusieurs couleurs - Google Patents

Procédé et dispositif pour mesurer optiquement la position d'impression et/ou la déviation de registre entre les différentes couleurs dans une machine à imprimer en plusieurs couleurs Download PDF

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Publication number
EP0993947B1
EP0993947B1 EP99118711A EP99118711A EP0993947B1 EP 0993947 B1 EP0993947 B1 EP 0993947B1 EP 99118711 A EP99118711 A EP 99118711A EP 99118711 A EP99118711 A EP 99118711A EP 0993947 B1 EP0993947 B1 EP 0993947B1
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EP
European Patent Office
Prior art keywords
camera
printing
mode
register
case
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.)
Expired - Lifetime
Application number
EP99118711A
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German (de)
English (en)
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EP0993947A1 (fr
Inventor
Volker Lohweg
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.)
ELTROMAT GESELLSCHAFT fur INDUSTRIE-ELEKTRONIK MBH
Original Assignee
ELTROMAT GESELLSCHAFT fur INDUSTRIE-ELEKTRONIK MBH
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0081—Devices for scanning register marks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/10—Starting-up the machine
    • B41P2233/13—Pre-registering

Definitions

  • the invention relates to an apparatus and a method for Setup control of a printing press and for web control according to the preamble of claim 1 or 13.
  • Web-fed rotary printing presses are known, the devices to detect a register error between the for different colors of printing units arranged one after the other Correction of register errors, a so-called register regulation, exhibit.
  • These devices are usually based on a detection of each pressure level on a separate Edge section of a material web also printed Registration marks by means of an optical sensor. By Detection of an actual distance between individual registration marks and comparison with a predetermined target distance can be Register errors between subsequent pressure levels permanent compensate.
  • a specially coded brand can be printed, for example in the form of a so-called barcode, however can only be poorly evaluated using an area scan camera can, but usually a one-dimensional optical Sensor, a so-called path switch, is required. So by means of the entire circumference of the cylinder was scanned and then electronically with appropriate algorithms and pattern recognition process the brand measurement pattern as well whose exact position can be determined.
  • a disadvantage the need for this next to the area scan camera additionally provide a one-dimensional optical sensor because the area camera at the first cylinder revolution is unable to correctly capture the brand field and then the correct position of the impression cylinder at the first cylinder revolution at the appropriate speed align.
  • the invention is therefore based on the task of a simple one Device or a simplified method for Control to create an area camera, so that in addition to the existing sensors no further sensors required are.
  • the device according to the invention enables by means of a only each printing cylinder of a web-fed rotary printing press assigned optical sensor both a quick set-up control after changing roles as also effective register regulation.
  • a block mark for example in the form of several different wide contrasting rectangles, or in the form of a Rectangular bar and several subsequent points, by means of a line scan mode is scanned.
  • the camera simulates Do a barcode reader by using one or less side-by-side camera lines, which in turn only a few pixels from the center are used, a one-dimensional Scanning is simulated. That way only one optical sensor in each printing cylinder Form of a camera necessary, its different mode of operation using software and hardware technology in the downstream evaluation unit can be realized.
  • such one-dimensional optical sensor In the set-up phase of the printing press, such one-dimensional optical sensor a full cylinder circumference of a printing cylinder and scanned in the downstream evaluation unit, together with the output signal a rotation angle sensor assigned to the pressure cylinder, processed.
  • you can use a camera editing window all brands recorded and measured become.
  • an area scan camera it cannot be without also searched an entire cylinder circumference for brands and then analyze them. Rather, the successive ones should Recording window after a sequence be evaluated. For example, has a capture window a length of 50 mm in the running direction, are for examination a format of 500 mm in length to the presence brands require at least ten machine revolutions. This inevitably leads to increased waste in the printing press.
  • the entire scanner can be scanned within one cylinder revolution Scan the cylinder circumference and use the appropriate methods the pattern recognition for the presence of an AME block mark investigate.
  • the positioning of the printing cylinder can be set in this way be that the register mark field directly below the Camera lens is because the distance from the block mark to Register mark field is a stored in the evaluation unit Size.
  • the setup phase the printing machine ended and the printing phase can be done manually or be started automatically.
  • one second operating mode of the digital camera switched wherein this is a complete output of their entire pixel matrix delivers to the evaluation unit. In this operating mode then the actual measurement of the individual register marks performed; the register control is then activated.
  • An advantageous improvement in the scanning quality can be achieved by achieve additional lighting for each camera section.
  • Fig. 1 shows a schematic representation of a section a web of material to be printed shown in FIG. 3 3, for example a sheet of paper printed in a printing machine, not shown here, printed in multiple colors becomes.
  • One is indicated by means of a perforation 10 edge strip 4 connected to the material web 3, on the markings 1, 2 for quick setup of the printing cylinder as well as for register regulation, that is to say for compensation regulation of register errors.
  • the edge strip 4 is after the printing process from the material web 3 or separated from the printed sheet.
  • a so-called AME block mark 1 consisting of several rectangles of different widths 1a, 1b, 1c, the during the first printing pass of the first printing cylinder on the Edge strip 4 is also printed.
  • This block mark 1 is in Type of a so-called barcode designed and used for quick and waste-free setup of the following, intended for printing different colors, Pressure cylinder. So in the setup phase of the machine by means of a one-dimensional optical sensor, the Function and mode of operation described in more detail below will be a full cylinder circumference each Printing cylinder are scanned, the resulting signal in an evaluation unit downstream of the optical sensor processed and to control the respective printing cylinder, each of which is also equipped with a rotation angle sensor is used.
  • a so-called register mark field can also be seen in FIG. 1 2, which is in the direction of travel of the material web 3 is in line with the block mark 1, so that the optical sensor with a fixed adjustment of both the block mark 1 as well as register mark field 2.
  • the Register mark field 2 consisting of several marks 2a, 2b, 2c, 2d, is in a certain, firmly defined and as Brand offset b designated distance from the block mark 1 applied.
  • Brand offset b designated distance from the block mark 1 applied.
  • Those of the one after the other and for the Printing cylinders provided in different colors successively printed individual marks 2a, 2b, 2c, 2d of register mark field 2 are as long as there is no register error occurs, equally spaced.
  • This distance is in hereinafter referred to as brand distance a.
  • the brand distance a is in permanent operation with the printing press optical sensors detects, evaluates and thus serves for regulation of register errors.
  • Fig. 2 shows a variant of the brand field consisting of an AME block mark 1 and a register mark field 2.
  • Die rectangular mark 1a and the punctiform marks 1b and 1c of the block mark field 1 are for adjusting the printing cylinders intended; they are therefore also referred to as the base color.
  • the punctiform marks 2a, 2b, 2c and 2d of the register mark field 2 preferably have the same dimensions on like the marks 1b and 1c of the block mark field 1.
  • the brand 2d in turn represents a trademark, the marks 2a to 2c the colors of the other printing units.
  • Camera 14 for example a CCD digital camera, according to the invention in two different operating modes can be used.
  • a so-called search mode hereinafter referred to as the first operating mode (mode I)
  • the camera 14 becomes comparable as a one-dimensional sensor a barcode reader, and is therefore able to Find block mark 1 quickly and its exact position to determine.
  • operating mode I will only a small area of the camera image is evaluated, for example, only one or two lines in the middle of one the pixel matrix representing the camera image. Of these Lines are evaluated only a few pixels, so that a one-dimensional sensor is simulated with the camera 14.
  • the block mark is 1 from each of the individual printing cylinders assigned camera 14 is found, the correct angle Positioning of the printing cylinder using the rotation angle sensor set so that the register mark field 2 is located exactly under the lens of the camera 14.
  • This automatic Positioning is no problem over the previous one and the value of the brand offset stored in the evaluation unit b adjustable.
  • the printing cylinders can be used with it at the same time with minimal waste in the shortest possible time set up.
  • the regulation of the pressure cylinder to compensate for register errors is then carried out during operation of the printing press Using a second operating mode (mode II) of the camera 14.
  • mode II a second operating mode of the camera 14.
  • the camera 14 is operated as a conventional area camera, the detected pixel patterns, particularly with regard to the mark distances, in the downstream evaluation unit be compared with stored target patterns and depending on the agreement or deviation, a register regulation can be done.
  • FIG. 3 shows a schematically simplified illustration a section of the material web 3 or Sheet with printed register mark field 2 and above arranged camera 14.
  • a regular can be seen spaced perforation 6 close to an outer edge 8 of the web Edge strip 4.
  • the in a corresponding toothing on the Hole 6 engaging pressure cylinder serves primarily for exact transport of the material web 3.
  • a perforation 10 is provided, which is a slight separation of the edge strip 4 after completion enables the printing process.
  • Register mark field 2 consisting of several marks A, B, C, D for register control of top printing as well as off optionally available marks W, X, Y, Z for register control an underside print, is close to the perforation 10 the edge strip 4 printed.
  • the only symbolic in Fig. 3 indicated camera 14 is preferably vertical to the surface of the material web 3 and slightly spaced to Register mark field 2, which is 3 while the material web is running in the direction of an arrow drawn in for clarification 12 moved under the camera 14.
  • the image sharpness and therefore the quality of the optical resolution of the camera 14 can be expediently increase by flash lighting 19, which synchronizes with the sampling clock of the camera 14 is. This means that the camera 14 takes place with each recorded image at the same time triggering a flash.
  • the flash lighting 19 expediently switched to continuous light operation.
  • FIG. 4 shows an example in a simplified block diagram Arrangement of a control device according to the invention for device control and for register control of a Press. 4 is an example of the control device shown for only one impression cylinder. The remaining Printing cylinders are operated in the same way by the central evaluation unit driven.
  • the camera 14 can be seen as an optical sensor, those printed on a material web Reads block marks 1 and register marks 2 and their output signal from a downstream evaluation unit 18 is processed. Digital cameras can preferably be used as cameras 14 be used.
  • the evaluation unit 18 controls Operating mode II continues to be based on that of the camera 14 captured image section directed flash lighting 19 synchronous to the sampling frequency of the camera 14.
  • operating element 20 indicated operating element can be between operating mode I the set-up phase and operating mode II of the printing phase can be switched.
  • This switchover is carried out, for example, on a control terminal by manual Entry, but can also be done automatically after the correct position of the pressure cylinders determined and adjusted has been.
  • the switching element 20 simultaneously affects that of the Evaluation unit 18 processed sensor signal of camera 14.
  • a surface mode in which all individual pixel signals of the camera 14 are evaluated and used for register control of the printing press
  • a one-dimensional operating mode mode I
  • mode II a surface mode in which all individual pixel signals of the camera 14 are evaluated and used for register control of the printing press
  • mode I one-dimensional operating mode
  • the switching element 20 controls one Control block 21 to the individual printing cylinders 26 individually.
  • angle of rotation sensor 16 supplied signal and the one recorded by the camera 14 and recognizing the block mark 1 one-dimensional signal becomes an actuator 24, for example an electric motor, for correct angle Alignment of each printing cylinder 26 driven.
  • the switching element 20 controls via a control block 22 and an adjustment drive 28, for example an electric or hydraulic linear drive, a clamping element arranged downstream of each printing cylinder 26 30 to that about a different tension of the material web 3 for fine adjustment of the web position on each single pressure cylinder 26 provides.
  • an adjustment drive 28 for example an electric or hydraulic linear drive
  • a clamping element arranged downstream of each printing cylinder 26 30 to that about a different tension of the material web 3 for fine adjustment of the web position on each single pressure cylinder 26 provides.
  • the register marks 2 recognizing signal and analyzed by the evaluation unit 18 the tensioning element becomes a sensitive register control 30 controlled.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (14)

  1. Dispositif pour la commande d'équipements d'une machine d'imprimerie et pour la régulation de bande afin d'éviter des erreurs de coïncidence entre les différentes couleurs lors d'une impression polychrome,
    avec un codage optique appliqué sur un côté longitudinal d'une bande de matière (3) à imprimer,
    avec à chaque fois un capteur d'angle de rotation (16) associé à chaque cylindre d'impression (26),
    avec à chaque fois un dispositif de réglage (24) pour faire tourner chaque cylindre d'impression (26) de manière séparée et indépendante,
    avec à chaque fois un dispositif capteur optique associé à chaque cylindre d'impression (26) et détectant le codage optique de manière continue, et
    avec une unité d'analyse (18) détectant et traitant les signaux de capteur des dispositifs capteurs optiques et des capteurs d'angle de rotation (16), caractérisé en ce que
       le dispositif capteur optique au nombre d'au moins un associé à chaque cylindre d'impression (26) présente deux modes de fonctionnement différents (I, II), soit pour la commande d'équipements après la mise en place d'une nouvelle bande de matière (3), soit pour la régulation de coïncidence dans le mode d'impression courant.
  2. Dispositif selon la revendication 1, caractérisé en ce que dans le premier mode de fonctionnement (I), les dispositifs capteurs optiques détectent une marque de bloc (1) imprimée sur la bande de matière (3) pour déterminer la position de la bande de matière (3) par rapport à la position angulaire du cylindre d'impression (26).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que dans le deuxième mode de fonctionnement (II), les dispositifs capteurs optiques détectent des marques de coïncidence (2) imprimées sur la bande de matière (3) pour régler la coïncidence dans le mode d'impression courant.
  4. Dispositif selon la revendication 3, caractérisé en ce que le dispositif capteur optique au nombre d'au moins un, associé à chaque cylindre d'impression (26), est à chaque fois une caméra (14).
  5. Dispositif selon la revendication 4, caractérisé en ce que les caméras (14) sont des caméras numériques CCD.
  6. Dispositif selon l'une des revendications précédentes, caractérisé en ce que la marque de bloc (1) est composée d'au moins deux rectangles contrastés et de largeurs différentes imprimés sur une bande de bordure (4) de la bande de matière (3).
  7. Dispositif selon l'une des revendications précédentes, caractérisé en ce que les marques de coïncidence (2) sont composées de marques de coïncidence (2a, 2b, 2c, 2d) imprimées par chaque cylindre d'impression (26) à distance régulière les unes des autres sur la bande de bordure (4).
  8. Dispositif selon l'une des revendications 6 ou 7, caractérisé en ce que dans le premier mode de fonctionnement (I), l'unité d'analyse (18) transforme les signaux fournis par la caméra (14) en un signal unidimensionnel du codage optique de la marque de bloc (1), de sorte qu'un réglage du cylindre d'impression (26) dans la bonne position angulaire a lieu.
  9. Dispositif selon la revendication 8, caractérisé en ce que, dans l'unité d'analyse (18) dans le deuxième mode de fonctionnement (II), un signal de régulation pour une régulation de coïncidence est formé à partir des signaux du codage optique des marques de coïncidence (2) fournis par la caméra (14).
  10. Dispositif selon l'une des revendications précédentes, caractérisé en ce que, dans le premier mode de fonctionnement (I), est associé à chaque caméra (14) un éclairage en lumière constante pour éclairer le cadrage de caméra détecté.
  11. Dispositif selon l'une des revendications précédentes, caractérisé en ce que, dans le deuxième mode de fonctionnement (II), est associé à chaque caméra un éclairage par flash (19), dont la fréquence de flash est à chaque fois synchronisée avec la fréquence de balayage de la caméra (14) lui correspondant.
  12. Dispositif selon l'une des revendications 10 ou 11, caractérisé en ce que l'éclairage associé à chaque caméra (14) peut être commuté entre un mode à lumière continue dans le premier mode de fonctionnement (I) et un mode à lumière flash dans le deuxième mode de fonctionnement (II).
  13. Procédé de commande d'équipement d'une machine d'imprimerie et de régulation de la bande afin d'éviter des erreurs de coïncidence entre les différentes couleurs en impression polychrome, présentant les étapes consistant à :
    appliquer une marque de bloc similaire à un code à barres sur un côté longitudinal d'une bande de matière à imprimer ;
    appliquer une zone de marques d'impression sur la bande latérale à une distance prédéterminée de la marque de bloc ;
    scanner une circonférence de cylindre complète d'un cylindre d'impression de la machine d'impression au moyen d'une caméra de surface fonctionnant en mode unidimensionnel ;
    analyser les signaux détectés afin de localiser la marque de bloc ;
    basculer la caméra de surface en mode de surface ;
    mesurer les marques de la zone de marques en mode surfacique de la caméra de surface.
  14. Procédé selon la revendication 13, caractérisé en ce qu'en mode unidimensionnel ou premier mode de fonctionnement (I), un éclairage de chaque cadrage détecté par chaque caméra (14) est obtenu au moyen d'un éclairage à lumière constante d'un éclairage à lumière flash fonctionnant en lumière constante, et en ce qu'en mode surfacique ou deuxième mode de fonctionnement (II), un éclairage du cadrage détecté par chaque caméra (14) est obtenu au moyen d'un éclairage à lumière flash, dont la fréquence de flash est synchronisée avec la fréquence de balayage de la caméra (14) correspondante.
EP99118711A 1998-10-15 1999-09-22 Procédé et dispositif pour mesurer optiquement la position d'impression et/ou la déviation de registre entre les différentes couleurs dans une machine à imprimer en plusieurs couleurs Expired - Lifetime EP0993947B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19847666A DE19847666B4 (de) 1998-10-15 1998-10-15 Vorrichtung und Verfahren zur Registerregelung einer Druckmaschine beim Mehrfarbendruck
DE19847666 1998-10-15

Publications (2)

Publication Number Publication Date
EP0993947A1 EP0993947A1 (fr) 2000-04-19
EP0993947B1 true EP0993947B1 (fr) 2003-04-16

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DE (2) DE19847666B4 (fr)

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US7555985B2 (en) 2002-11-22 2009-07-07 Windmoeller & Hoelscher Kg Pre-register adjustment

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WO2001081087A1 (fr) * 2000-04-25 2001-11-01 Mitsubishi Heavy Industries, Ltd. Procede et appareil permettant de detecter un dephasage angulaire
DE10024070A1 (de) * 2000-05-17 2001-11-22 Kolbus Gmbh & Co Kg Kontrolleinrichtung zur Anwendung in einer Maschine zur Druckbogenweiterverarbeitung zum Erkennen von Druckbogen
EP1156381A3 (fr) * 2000-05-17 2005-03-23 Eastman Kodak Company Méthode et appareil pour la correction des erreurs de registration dans une imprimante couleur
DE10027856C2 (de) * 2000-06-06 2002-09-19 Bst Servo Technik Gmbh Verfahren und Vorrichtung zum Lesen von Registermarken
DE10030572A1 (de) * 2000-06-21 2002-01-03 Aradex Ag Passerregelungssystem für eine bahnverarbeitende Maschine
KR20030086331A (ko) 2001-03-28 2003-11-07 소니 가부시끼 가이샤 양자화 장치, 양자화 방법, 양자화 프로그램 및 기록 매체
DE10119060A1 (de) * 2001-04-18 2002-10-31 Sensor Instr Gmbh Verfahren und Vorrichtung zum Überprüfen der geometrischen Zuordnung wenigstens zweier, auf eine sich bewegende Bahn aufgebrachter Marken
EP1295721A1 (fr) * 2001-09-25 2003-03-26 Gidue S.p.a. Dispositif pour calibrer le cylindre de plaque d'une presse flexographique
EP1384580A1 (fr) * 2002-07-27 2004-01-28 serv-o-tec Druck- und Papierverarbeitungsmaschinen GmbH Procédé et dispositif pour réglage des registres d'une machine à imprimer
US20060219109A1 (en) * 2003-03-20 2006-10-05 Cadillach Felip F Method of registering different colours in flexography, and flexographic printer comprising a device for implementing said method
DE202004014157U1 (de) * 2004-09-09 2006-02-09 Planatol Klebetechnik Gmbh Markiereinrichtung
ES2264390B1 (es) * 2005-06-10 2008-03-01 Comexi, S.A. Metodo para ajustar automaticamente la presion de impresion en maquinas impresoras flexograficas.
DE102008024104A1 (de) * 2008-05-17 2010-05-27 Robert Bosch Gmbh Materialmarkensensor und Verfahren zum Erfassen einer Markierung auf oder in einem Material
DE102012101310C5 (de) 2012-02-17 2014-09-04 Stephan Krebs Vorrichtung und Verfahren zur Druckbildkontrolle
DE102013211250B4 (de) * 2013-06-17 2019-05-02 Koenig & Bauer Ag Druckmaschine mit mehreren gemeinsam einen Bedruckstoff bedruckenden Druckwerken
DE102015210491A1 (de) * 2015-06-09 2016-12-15 Heidelberger Druckmaschinen Ag Erstellung von Marken in der Vorstufe eines Druckprozesses
CN105150669A (zh) * 2015-10-20 2015-12-16 王志洁 一种无色标套印用的前置基准色标印版

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DE4301272A1 (de) * 1993-01-19 1994-07-21 Eltromat Ges Fuer Ind Elektron Vorrichtung zur Bestimmung des Registerfehlers zwischen den einzelnen Farben beim Mehrfarbendruck in einer Langbahn-Rollenrotationsdruckmaschine

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Publication number Priority date Publication date Assignee Title
US7555985B2 (en) 2002-11-22 2009-07-07 Windmoeller & Hoelscher Kg Pre-register adjustment

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DE19847666A1 (de) 2000-04-20
EP0993947A1 (fr) 2000-04-19
DE59905048D1 (de) 2003-05-22
DE19847666B4 (de) 2005-10-20

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