EP0353228B1 - Procede pour positionner des cylindres de plaque dans une presse rotative pour impression en plusieurs couleurs - Google Patents

Procede pour positionner des cylindres de plaque dans une presse rotative pour impression en plusieurs couleurs Download PDF

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Publication number
EP0353228B1
EP0353228B1 EP88902421A EP88902421A EP0353228B1 EP 0353228 B1 EP0353228 B1 EP 0353228B1 EP 88902421 A EP88902421 A EP 88902421A EP 88902421 A EP88902421 A EP 88902421A EP 0353228 B1 EP0353228 B1 EP 0353228B1
Authority
EP
European Patent Office
Prior art keywords
register
plate cylinders
printed
register mark
another
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
EP88902421A
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German (de)
English (en)
Other versions
EP0353228A1 (fr
Inventor
Friedrich Karl Bayerlein
Dietrich Roland Kamillus Leuerer
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 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 AG filed Critical Koenig and Bauer AG
Publication of EP0353228A1 publication Critical patent/EP0353228A1/fr
Application granted granted Critical
Publication of EP0353228B1 publication Critical patent/EP0353228B1/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
    • B41F33/0081—Devices for scanning register marks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/10—Forme cylinders
    • B41F13/12—Registering devices

Definitions

  • the invention relates to a method for positioning plate cylinders in a multi-color rotary printing press according to the preamble of the claim.
  • the scanning device is a video camera.
  • the camera is designed as a Vidikon or a so-called CCD camera and equipped with a zoom lens.
  • DE-OS 24 55 973 describes an optical character reading device with which it is possible to digitize the video signal.
  • PCT application WO86 / 05141 has disclosed a method and a device for carrying out the method for a multicolor rotary printing press, in which the plate cylinders can be positioned relative to one another in accordance with the deviation of the register marks from one another.
  • a group of markings depicted on the print carrier is made using a video camera. This image is converted into a numerical image and compared with an "analysis window".
  • the "analysis window” consists of a reference point to which a marking on the print carrier is assigned.
  • a disadvantage of the method according to the citation is that the color register marks are designed as points of approximately 1 mm in diameter and are arranged as corner points of an imaginary square with an edge length of approximately 10 mm.
  • this type of register point is difficult to record electronically. Faults on the print carrier around or within the register mark square could be incorrectly evaluated by the electronics as a register point. With point-shaped register marks, a leading, additional, bar-shaped trigger register mark is necessary. In addition, the position of each point must be calculated for each point in the X and Y directions. If the electronics fail, the printer will be less able to visually recognize the register deviation from the marks, as they can be up to 10 mm apart.
  • the invention has for its object to provide a method with which it is possible to measure the color register (longitudinal and side register) on multi-color rotary printing presses using a color video camera and to determine deviations from a target value without it being necessary in any case is to evaluate the entire measurement window.
  • the advantages that can be achieved with the invention consist in particular in that the offset of the register marks relative to one another can be measured both in the X and in the Y axis direction. So it does not need to be specially calculated using a computer. Because the register marks are designed as regular, geometric figures, it is possible by means of software check that only register marks and no faults on the print carrier are evaluated. It is also easy for the printer to visually check the position of the register marks relative to one another on a screen. It is only necessary to show a scale in the X and Y directions in the image on the screen. It is also not necessary to evaluate the entire "analysis window". As a rule, only the immediate environment around the center of the "analysis window" needs to be evaluated. Only in extreme cases must the entire "analysis window” be read and evaluated digit by digit. As a result, the decision-making and introduction of adjustment inputs is faster than with the citation method, provided the same computing capacity.
  • PCT patent application WO86 / 05141 shows and describes how color register marks for multi-color printing on a print carrier, e.g. B. a paper web, printed and recorded by a color video camera and the video signals are evaluated in a computer.
  • This PCT patent application also shows where and how color register marks are arranged on the print carrier. It is therefore unnecessary to describe in detail the multi-color printing process and the means for adjusting the plate cylinders in their longitudinal axis direction about their longitudinal axis.
  • a printing medium 1 passes through four printing units, 2, 3, 4, 6.
  • Each of the printing units 2, 3, 4, 6 consists in a known manner of an impression cylinder, a blanket cylinder, a plate cylinder and an inking unit.
  • the plate cylinders 7, 8, 9, 11 are shown with their pressure plates 12, 13, 14, 16 (viewed in the direction of the print carrier).
  • Each of the z. B. four printing plates 12, 13, 14, 16 is provided with a register mark image 17 or 18 or 19 or 21 and depending on the color z. B. in the order black-blue-red-yellow the corresponding imprint 17 ', 18', 19 'or 21' on the print medium 1, with 17 'in black, 18' in blue, 19 'in red and 21 'Is printed in yellow.
  • the register mark images 17, 18, 19 and 21 and thus the register mark imprints 17 ', 18', 19 'and 21' are designed as regular figures, preferably as closed squares or as circles. When printed, your lines are approx. 0.01 - 0.05 mm wide.
  • Register mark images 17, 18, 19 and 21 are all different sizes, i.e. their diameters are different.
  • the distances "x" and "y" are not the same as soon as the longitudinal and / or side register is not correct between the individual colors.
  • an image scanner 22 can be used, as described for. B. is known in principle from DE-OS 31 88 699 and PCT patent application WO86 / 05141.
  • the measured deviations x1, x2, x3 and y1, y2, y3 at z. B. a four-color print are then fed to the rotation of the plate cylinders 7, 8, 9, 11 relative to each other in the circumferential direction (longitudinal register) and for displacement in the axial direction as actual values of a controlled system, with setpoints (1 x, 2 x, 3 x) 1 times y, 2 times y, 3 times y) and adjusted values are formed therefrom and by means of adjusting devices 24, 26, 27, 28 attached to the plate cylinders 7, 8, 9, 11, the plate cylinders 7 to 11 are mutually circumferential and / or or adjusted longitudinal axis direction.
  • register mark imprints 17 'to 21' are printed for a printed image of the multicolor print in a designated area on the print carrier 1, their position in the X, Y coordinate system in the X and Y direction during the run of the print carrier 1 continuously recorded by means of a video camera 22. Then the distances x1, x2, x3 in the X-axis direction and y1, y2, y3 in the Y-axis direction of z. B. the boundary of the smallest register mark imprint 17 'to the other register mark imprints 18', 19 ', 21' measured electronically.

Landscapes

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

Abstract

Des repères sous forme de figures géométriques régulières de tailles différentes, par exemple des cercles ou des carrés, sont imprimés les uns à l'intérieur des autres et leur position relative est évaluée dans le sens de l'axe des X et/ou des Y.

Claims (3)

1. Procédé pour positionner entre-eux des cylindres de plaque (7,8,9,11) dans une presse rotative pour impression en plusieurs couleurs, où, par cylindre d'impression et par couleur, un point de repère (17′,18′,19′,21′) est imprimé sur un support d'impression (1), les positions de ce point de repère (17′,18′,19′,21′) étant mesuré par un dispositif d'exploration d'image (22), sur une face du support d'impression (1), leurs espacements mutuels (X₁, X₂, X₃ et Y₁, Y₂, Y₃) étant mesurés suivant l'axe des X et l'axe des Y et ensuite convertis dans un dispositif électrique (régulation) (23), en valeurs de réglage pour le réglage mutuel des cylindres de plaque (7,8,9,11), en direction axiale et ou en direction périphérique, caractérisé en ce qu'une pluralité de figures géométriquement régulières, avec des lignes de délimitation minces et des dimensions de valeurs différentes entre elles, sont imprimées les unes dans les autres, successivement, à titre d'empreintes d'impression (17′,18′,19′,21′), servant de points de repère, dans une zone prévue d'une face du support d'impression (1).
2. Procédé selon la revendication 1, caractérisé en ce que les figures sont imprimées sous forme de carrés de tailles différentes.
3. Procédé selon la revendication 1, caractérisé en ce que les figures sont imprimées sous forme de cercles de tailles différentes.
EP88902421A 1987-03-26 1988-03-25 Procede pour positionner des cylindres de plaque dans une presse rotative pour impression en plusieurs couleurs Expired - Lifetime EP0353228B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3709951 1987-03-26
DE3709951 1987-03-26
DE3809941 1988-03-24
DE3809941A DE3809941A1 (de) 1987-03-26 1988-03-24 Verfahren zum positionieren von plattenzylindern in einer mehrfarben-rotationsdruckmaschine

Publications (2)

Publication Number Publication Date
EP0353228A1 EP0353228A1 (fr) 1990-02-07
EP0353228B1 true EP0353228B1 (fr) 1992-01-02

Family

ID=25853933

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88902421A Expired - Lifetime EP0353228B1 (fr) 1987-03-26 1988-03-25 Procede pour positionner des cylindres de plaque dans une presse rotative pour impression en plusieurs couleurs

Country Status (5)

Country Link
US (1) US5056430A (fr)
EP (1) EP0353228B1 (fr)
JP (1) JPH02501373A (fr)
DE (2) DE3809941A1 (fr)
WO (1) WO1988007449A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN109484045A (zh) * 2017-09-12 2019-03-19 海德堡印刷机械股份公司 自动化的图像传感器校准

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CN109484045B (zh) * 2017-09-12 2021-09-14 海德堡印刷机械股份公司 自动化的图像传感器校准

Also Published As

Publication number Publication date
US5056430A (en) 1991-10-15
JPH02501373A (ja) 1990-05-17
EP0353228A1 (fr) 1990-02-07
WO1988007449A1 (fr) 1988-10-06
DE3867469D1 (de) 1992-02-13
DE3809941A1 (de) 1988-10-06

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