EP0576824B1 - Dispositif de contrÔle de la qualité d'impression pour machine d'impression rotative recto-verso - Google Patents

Dispositif de contrÔle de la qualité d'impression pour machine d'impression rotative recto-verso Download PDF

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Publication number
EP0576824B1
EP0576824B1 EP93108250A EP93108250A EP0576824B1 EP 0576824 B1 EP0576824 B1 EP 0576824B1 EP 93108250 A EP93108250 A EP 93108250A EP 93108250 A EP93108250 A EP 93108250A EP 0576824 B1 EP0576824 B1 EP 0576824B1
Authority
EP
European Patent Office
Prior art keywords
sheet
quality control
printing
control means
printing quality
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
EP93108250A
Other languages
German (de)
English (en)
Other versions
EP0576824A1 (fr
Inventor
Hans-Bernard Dr.-Ing. Bolza-Schünemann
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.)
Koenig and Bauer AG
Original Assignee
Koenig and Bauer Albert 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 Koenig and Bauer Albert AG filed Critical Koenig and Bauer Albert AG
Publication of EP0576824A1 publication Critical patent/EP0576824A1/fr
Application granted granted Critical
Publication of EP0576824B1 publication Critical patent/EP0576824B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control

Definitions

  • the invention relates to a print quality control device for a perfecting and rotary printing press according to the preamble of patent claim 1.
  • On-line print quality control devices for rotary printing presses are e.g. B. become known by the generic EP 01 94 331 A1 or US 44 88 808 A1. These two documents describe in detail quality control devices for straight printing.
  • Another known design works with two stacked jibs placed one behind the other, to which the sheets are fed in opposite directions, so that one side of the stack has the face side and the other side the back side is on top for visual quality control. High machine outputs are possible here, but the machines become considerably longer and more expensive with two stacks.
  • the invention has for its object to provide a print quality control device on a perfecting and rotary printing press, preferably sheet-fed rotary printing press, by means of which it is possible to make do with only a single high or low stack delivery.
  • paper sheets 1 are printed in a known manner in perfect and reverse printing. H. printed on both sides.
  • the sheets 1 are transferred from the last printing unit to a sheet delivery device 2 known per se.
  • the sheet delivery device 2 takes over and transports the sheets 1 by means of controlled gripper rows (not shown) and by opening the gripper rows the sheets 1 are placed on a stacking device 3.
  • the rows of grippers are mounted on known gripper carriages, which are attached to two endless chains 4. Sprockets 6 driven by the main drive of the machine ensure the synchronous drive of the sprockets 6 to the machine.
  • a typical feature of the sheet delivery devices 2 is that they have a longer straight sheet transport path 7 which rises upwards and adjoins the chain wheels 6.
  • flash light source 9 is provided, which is arranged at a distance outside the detection cone of a video camera 13 printed sheet side 12 in reverse printing. Flash light source 9 and video camera 13 are synchronized with each other. At some distance the video camera 13 is arranged from a movement track of the sheet 1.
  • the video camera 13 is equipped as a stationary system with a CCD area sensor and the guide beam strikes the top of the sheet at a right angle. The distance and focal length of the video camera are chosen so that the entire surface of a sheet of maximum format is captured with a single "shot".
  • a z. B. at the shaft end of the sprocket 6 arranged encoder 14 is provided.
  • This encoder 14 makes a photoelectronic triggering device “armed” which can be implemented as mark or edge or print start detection optoelectronics. Now detects the mark or edge or start of print detection optoelectronics in the "window phase” in which it is “sharp” via the encoder 14, the intended printed mark 18 or the leading edge of the sheet or any other freely selectable marked print Line or the beginning of printing, the signal obtained is passed to the microprocessor unit and this triggers a control command to actuate the flash unit 9 and the video camera 13.
  • a single picture is taken by the video camera 13 and the image content is stored digitally in the memory of the microprocessor unit 16 and compared pixel-by-pixel with nominal values also stored there.
  • the microprocessor unit 16 sends control pulses 17 to the electrical control of the Machine issued that the signals for the operator or a marking device in operation to mark the rejected sheet or to activate a known sheet ejection device.
  • a flash light source 11 is arranged at a distance, a second video camera 19 with an optical system and a CCD area sensor at a greater distance.
  • the arrangement and function and activation of video camera 19, flash light source 11 and encoder 21 are the same as described for flash light source 9, video camera 13 and encoder 14.
  • the mark or edge or print start detection device is also the same as that described above.
  • an encoder 21 assigned to the camera 19 is driven by the shaft of the chain wheels 6.
  • the encoders 14 and 21 are connected to the microprocessor unit 16 in terms of switching technology. Control, control and error evaluation are the same in both video camera systems for perfecting.
  • the inventive arrangement of the two video cameras with surface CCD sensors in the ascending part of the sheet delivery it is possible to control both the front and back of the sheet before placing the sheet on the stack in terms of print quality.
  • the sheet control device is switched to plan in order to record the "good" print pattern as a setpoint and to store it pixel by pixel in the microprocessor.
  • the light sources 9, 11 are flashing light devices.
  • the video cameras 13 and 19 are arranged so that they take an overall picture when no gripper carriage passes through the picture.
  • sheet guide rods can be provided, on each of which the sheet in its pressure-free areas.
  • the brand of edge or print start opto-electronics is integrated in the video camera housing and in its electronic circuit.
  • suction rings pressurized with suction air can also be used, which also act on the bow in areas without pressure.
  • the peripheral speed of the suction rings is slightly lower than the arc speed. As a result, the sheet can be kept taut between the gripper rows and the suction rings during the measurement phase.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Claims (6)

  1. Le dispositif de contrôle de la qualité d'impression pour l'impression de feuilles, dans une machine d'impression rotative recto-verso présente les caractéristiques suivantes : au-dessous de l'axe de déplacement, se trouvent la feuille imprimée (1) à l'intérieur d'une zone d'acheminement de la feuille (7), rectiligne, disposée entre la roue dentée (6) et le dispositif d'empilage (3) ; une caméra vidéo (13, 19) équipée d'un palpeur de surface à transfert de charges, installée sur la voie d'acheminement et pouvant se déplacer de façon synchronisée ; une source de lumière flash (9, 11) en synchronisation avec la caméra vidéo (13) ; un dispositif de reconnaissance facultative des marques d'impression ou des lignes imprimées sur une feuille à contrôler (1) et pour le déclenchement d'une commande de prise de vue à la caméra vidéo (13, 19) et d'une commande de déclenchement d'une lumière-flash également par le dispositif de lumière-flash (9, 11) ; une unité de microprocesseur (16) avec mémoire de coordination de l'action de la caméra vidéo (13, 19), un dispositif de lumière-flash (9, 11) et un dispositif de reconnaissance facultative des marques d'impression ou des lignes imprimées.
  2. Le dispositif de contrôle de la qualité d'impression, selon la revendication de brevet 1, présente les caractéristiques suivantes : au-dessus et au-dessous de l'axe de déplacement des feuilles imprimées (1), dans la zone de surface d'acheminement des feuilles rectiligne, sont placées deux caméras vidéo (13, 19), disposant chacune d'une source de lumière-flash (9, 11) et d'un dispositif de reconnaissance facultative des marques d'impression ou des lignes imprimées.
  3. Le dispositif de contrôle de la qualité d'impression, selon les revendications de brevet 1 à 2, présente la caractéristique suivante : le dispositif de contrôle de la qualité d'impression contient un mode adaptatif, dans lequel le contenu d'image d'une feuille sélectionnée et imprimée est saisi et stocké dans une unité de microprocesseur (16), en tant que valeur nominale, sous forme de pixels.
  4. Le dispositif de contrôle de la qualité d'impression, selon la revendication 3 du brevet, présente la caractéristique suivante : le dispositif de contrôle de la qualité d'impression est placé en mode adaptatif lorsqu'une ou plusieurs feuilles jugée(s) d'une bonne qualité visuelle sont à nouveau acheminées jusqu'à la pile de sortie, en traversant la machine sans être à nouveau imprimée(s).
  5. Le dispositif de contrôle de la qualité d'impression, selon les revendications de brevet 1 à 4, présente la caractéristique suivante : plusieurs dispositifs de contrôle de la qualité d'impression, devant contrôler à la fois les pages recto et les pages verso, sont prévus (9, 13, 16, 11, 19, 16).
  6. Le dispositif de contrôle de la qualité des feuilles, selon les revendications 1 à 5 du brevet, présente la caractéristique suivante : des barres de guidage des feuilles et/ou des anneaux d'aspiration sont prévus pour l'acheminement et/ou la tension de la feuille dans les zones dans lesquelles la feuille n'est pas imprimée.
EP93108250A 1992-05-30 1993-05-21 Dispositif de contrÔle de la qualité d'impression pour machine d'impression rotative recto-verso Expired - Lifetime EP0576824B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4217942 1992-05-30
DE4217942A DE4217942A1 (de) 1992-05-30 1992-05-30 Druck-Qualitätskontrolleinrichtung für eine Schön- und Widerdruck-Rotationsdruckmaschine

Publications (2)

Publication Number Publication Date
EP0576824A1 EP0576824A1 (fr) 1994-01-05
EP0576824B1 true EP0576824B1 (fr) 1996-10-23

Family

ID=6460089

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93108250A Expired - Lifetime EP0576824B1 (fr) 1992-05-30 1993-05-21 Dispositif de contrÔle de la qualité d'impression pour machine d'impression rotative recto-verso

Country Status (4)

Country Link
US (1) US5471309A (fr)
EP (1) EP0576824B1 (fr)
JP (1) JPH0647906A (fr)
DE (2) DE4217942A1 (fr)

Cited By (1)

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CN102381019A (zh) * 2005-11-25 2012-03-21 卡巴-诺塔赛斯有限公司 在印刷机处理期间用于探测在印刷基质上印刷错误发生的方法

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DE20008731U1 (de) * 2000-05-17 2000-08-03 MAN Roland Druckmaschinen AG, 63075 Offenbach Druckmaschine, insbesondere Bogenoffsetdruckmaschine
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DE10248634A1 (de) * 2002-10-18 2004-04-29 Koenig & Bauer Ag Bogenrotationsdruckmaschine in Aggregatbauweise mit einer Bogeninspektionseinrichtung
EP1585057A1 (fr) * 2004-04-08 2005-10-12 KPL Packaging S.P.A. Dispositif et procédé de séléction et division d'une rame d'une pile de feuilles
DE102004021601B4 (de) * 2004-05-03 2020-10-22 Heidelberger Druckmaschinen Ag Inline-Messung und Regelung bei Druckmaschinen
DE102004060019B4 (de) * 2004-12-14 2010-08-12 Manroland Ag Verfahren zur Kennzeichnung von Druckexemplaren sowie Druckmaschine
DE102005018855B4 (de) * 2005-04-22 2010-01-28 Theta System Elektronik Gmbh Vorrichtung zur Inspektion von Druckererzeugnissen
DE102005026127B4 (de) * 2005-06-07 2007-02-08 Koenig & Bauer Ag Druckmaschine und ein Verfahren zur Herstellung eines Druckerzeugnisses
DE102005050433A1 (de) * 2005-07-16 2007-01-25 Man Roland Druckmaschinen Ag Verarbeitungsmaschine und Verfahren zum Betreiben einer Verarbeitungsmaschine
DE102005054122B4 (de) * 2005-11-12 2017-09-21 manroland sheetfed GmbH Verfahren zum Betrieb eines Qualitätskontrollsystems für eine Bogenrotationsdruckmaschine
US8017927B2 (en) * 2005-12-16 2011-09-13 Honeywell International Inc. Apparatus, system, and method for print quality measurements using multiple adjustable sensors
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DE202007009389U1 (de) 2007-07-04 2007-08-30 Man Roland Druckmaschinen Ag Bogenführung für Bogeninspektionssystem
DE102009012815A1 (de) 2008-04-14 2009-10-15 Heidelberger Druckmaschinen Ag Messvorrichtung mit beweglicher Messeinrichtung in einer Druckmaschine
EP2138437A1 (fr) * 2008-06-27 2009-12-30 Kba-Giori S.A. Système d'inspection pour contrôler la qualité de feuilles imprimées
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CN102381019A (zh) * 2005-11-25 2012-03-21 卡巴-诺塔赛斯有限公司 在印刷机处理期间用于探测在印刷基质上印刷错误发生的方法
CN102381019B (zh) * 2005-11-25 2014-04-30 卡巴-诺塔赛斯有限公司 在印刷机处理期间用于探测在印刷基质上印刷错误发生的方法

Also Published As

Publication number Publication date
EP0576824A1 (fr) 1994-01-05
US5471309A (en) 1995-11-28
JPH0647906A (ja) 1994-02-22
DE4217942A1 (de) 1993-12-02
DE59304252D1 (de) 1996-11-28

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