EP0749829B1 - Method for exact alignment of a printing image on a geometrically correct position in a printing machine - Google Patents

Method for exact alignment of a printing image on a geometrically correct position in a printing machine Download PDF

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Publication number
EP0749829B1
EP0749829B1 EP96201641A EP96201641A EP0749829B1 EP 0749829 B1 EP0749829 B1 EP 0749829B1 EP 96201641 A EP96201641 A EP 96201641A EP 96201641 A EP96201641 A EP 96201641A EP 0749829 B1 EP0749829 B1 EP 0749829B1
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EP
European Patent Office
Prior art keywords
printing
pins
centering device
registration marks
master
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
EP96201641A
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German (de)
French (fr)
Other versions
EP0749829A1 (en
Inventor
Harald Dr. Rer. Nat. Ahrens
Rainer Ziefle
Rainer Tiebel
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.)
Philips Intellectual Property and Standards GmbH
Koninklijke Philips NV
Original Assignee
Polygram Manufacturing & Distribution Centres GmbH
Polygram Manufacturing & Distr
Polygram Manufacturing & Distribution Centres GmbH
Philips Patentverwaltung GmbH
Polygram International Holding BV
Koninklijke Philips Electronics NV
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 Polygram Manufacturing & Distribution Centres GmbH, Polygram Manufacturing & Distr, Polygram Manufacturing & Distribution Centres GmbH, Philips Patentverwaltung GmbH, Polygram International Holding BV, Koninklijke Philips Electronics NV filed Critical Polygram Manufacturing & Distribution Centres GmbH
Publication of EP0749829A1 publication Critical patent/EP0749829A1/en
Application granted granted Critical
Publication of EP0749829B1 publication Critical patent/EP0749829B1/en
Anticipated expiration legal-status Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/005—Attaching and registering printing formes to supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/34—Screens, Frames; Holders therefor
    • B41F15/36—Screens, Frames; Holders therefor flat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2215/00—Screen printing machines
    • B41P2215/50—Screen printing machines for particular purposes
    • B41P2215/55—Screen printing machines for particular purposes for printing compact discs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/36—Means for registering or alignment of print plates on print press structure

Definitions

  • the invention relates to a method for the exact alignment of a a printed film arranged on a geometrically correct Printing position of a printing machine for printing on substrates, e.g. from CD's, the printing film having a perforation system aligned with the center of the image is provided and is attached to a printing screen, which on the center of the picture has aligned fitting bores, which are aligned with the center of the carrier Dowel pins of the printing press correspond.
  • a method mentioned at the outset is e.g. when printing CDs with the help a screen printing machine used.
  • the printed image to be printed on the CD's is delivered in the form of a printing film.
  • This printing film must be used for Imaging on the printing screen so that the printing process print image to be printed lies exactly over the CD to be printed.
  • This is the Provide the frame of the pressure screen with so-called fitting holes, which with fixed Dowel pins of the printing press correspond.
  • the fitting holes are Printing screen on the one hand and the dowel pins of the printing press on the other hand arranged and designed that after placing the pressure screen on his Bores on the dowel pins located on the center of the pressure screen Print image exactly over the center of the printing press CD lies.
  • JP 3-268115 A printing device has become known in which With the help of a camera arranged above the printing surface, an adjustment of the printing parts can be made.
  • the invention has for its object the alignment of the printed image on a to simplify the geometrically correct printing position of the printing press and the Increase accuracy of alignment.
  • This Centering device also contains so-called master pins that match the dowel pins Printing press are configured identically.
  • the centering elements provided with precisely fitting holes, e.g. Centering bushes, pushed on, which then with play in the expanded Fit holes of the pressure screen are introduced.
  • the insertion happens in that the centering device with the master pins arranged on it and the slipped centering bushings is lowered in the direction of the pressure screen.
  • the print image arranged on the printing screen is exactly in the exactly correct print position.
  • the centering bushes in the radial extended fitting holes e.g. with a quick-curing adhesive.
  • Print image on the geometerically correct printing position of the printing press must to ensure that, on the one hand, those arranged on the centering device Master pens take up their correct position so that the later with the master pins provided with the centering elements exactly into the extended ones Fitting holes of the pressure screen can be inserted.
  • the monitors connected to the cameras are connected to the Registration marks of the printing film are exactly stamped in position-identical registration marks will.
  • the adjustment of the Master pens on the perforation system of the printing film and the exact fixation of the Registration marks on the monitors in special procedures with the help of one on the Centering device attachable master plate is carried out on an edge with the Masterroche has identical location holes and at right angles to one adjacent edge is provided with a perforation system, which is identical in position with the perforation system of the printing film.
  • the sieve frame is fixed on the adjustment table e.g. through sideways attacking clamping elements and fixed stops such that the registration marks of the Printing film come to rest in the area below the cameras.
  • the bridge on both of them Ends held over vertical guides and is arranged to be lowered.
  • the adjustable table that can be moved in the X-Y direction Registration marks of the printing film have been brought into line with those of the monitors are, the bridge is lowered so that the centering elements in the expanded Intervene fitting holes.
  • a CD 11 to be printed lies on the printing press 10 according to FIG. 1.
  • a printing screen 13 which can be lowered in the direction 12 arranged. 2 has a frame 13a and one on The printing film 14 attached to the printing screen according to FIG. 3.
  • the printing film 14 contains the printed image 15 to be printed on the CD 11.
  • the printing film is in the figures and enlarged the print image, i.e. not drawn to scale.
  • the lower part of the pressure frame 13a has two radially enlarged fitting bores 16, in which fitting bushes 17 by an adhesive shown below are attached.
  • the fitting bushes 17 have bores 18 that fit with Dowel pins 19 on the printing press 10 correspond.
  • the fitting sockets 17 are so arranged and fixed in the radially enlarged fitting bores 16 that when the printing screen 13 is placed on the printing press 10, the dowel pins 19 engage precisely in the bores 18 so that the printed image 15 is accurate comes to lie above the CD 11 to be printed. This ensures that the print image 15 is transferred exactly to the center of the CD 11, with its center 11a.
  • the optical centering device contains one Base plate 20 on which an adjustment table 21 is displaceable in the X-Y direction is arranged. The adjustment in the X-Y direction is carried out on not shown Way of operating knurled screws 22.
  • Above the adjustment table 21 is a bridge 25 adjustable in the vertical direction 24 is provided on the as optical scanning directions two cameras 26 and two with the dowel pins 19 Printing machine 10 positionally identical master pens 27 are arranged. The bridge is 25 held at their ends via vertical guide rails 28 and lowerable stored arranged.
  • the printing film 14 with the printed image 15 with two registration marks 29 provided that at a fixed, precisely defined distance from the center 15a of the Print image. Then the printing film 14 on the printing screen 13 is approximately attached centrally. The printing screen 13 with the roughly adjusted printing film 14 is then attached to the adjustment table 21 by means of clamping elements 23.
  • the two Cameras 26 are assigned to monitors 30 on which the registration marks 29 location-identical registration marks 31 are marked. By adjusting the adjustment table 21 in the X-Y direction are then the registration marks 29 of the printing film 14 with the Registration marks 31 of the monitors 30 are brought into register.
  • Fig. 6 shows one e.g. made of aluminum massive master plate 32, which on the lower edge two fitting holes 33 and one of three on the adjacent edge Has holes existing hole system 34.
  • the pass holes 33 are used for precisely fitting recording of the master pins 27 arranged on the bridge 25
  • the master plate 32 is placed on the adjustment table 21, three on the Centering device on an adjustable bar arranged adjusting pins 35 in the Engage holes 34.
  • the bridge 25 is lowered so that the master pins 27 engage precisely in the fitting holes 33.
  • the bar with the Adjusting pins 35 locked so that the master pins 27 are now in a fixed, immovable relationship to the adjustment pins 35 or to the hole system 34 stand.
  • the printing film 14 is placed on the master plate 32 so that the Engage adjusting pins 35 in the hole system 14a of the printing film 14.
  • the Hole systems 14a and 34 are designed identically to one another. Are with 29a designates the points at which the registration marks 29 of the printing film 14 close come to lie. Now the bridge 25 with the cameras 26 is so far lowered that the registration marks 29 detected and on the monitors as registration marks 31 are shown. The previous calibration process ensures that the Master pins 27 lie exactly above the fitting holes 33. As soon as the on the Monitors 30 shown registration marks 31 are marked or fixed is the Calibration ends and the master plate 32 is removed. After that it can actual alignment of the printed image arranged on the printing film on the start correct print position.

Abstract

A CD Ä11Ü is aligned to be printed with information and images that are precisely located relative to the disc centre. The screen printing machine has the screen Ä13Ü within a frame. The printing foil Ä14Ü is located on the screen surface. The frame has dowel bushes Ä16Ü with holes that align with dowel pins Ä19Ü in the base. The print foil has two reference marks that relate with identical locating marks on the frame to ensure accurate alignment of the foil.

Description

Die Erfindung bezieht sich auf ein Verfahren zur exakten Ausrichtung eines auf einer Druckfolie angeordneten Druckbildes auf eine geometrisch richtige Druckposition einer Druckmaschine zum Bedrucken von Trägern, z.B. von CD's, wobei die Druckfolie mit einem auf die Bildmitte ausgerichteten Lochsystem versehen ist und auf einem Drucksieb befestigt wird, welches auf die Bildmitte ausgerichtete Paßbohrungen aufweist, die mit auf die Trägermitte ausgerichteten Paßstiften der Druckmaschine korrespondieren.The invention relates to a method for the exact alignment of a a printed film arranged on a geometrically correct Printing position of a printing machine for printing on substrates, e.g. from CD's, the printing film having a perforation system aligned with the center of the image is provided and is attached to a printing screen, which on the center of the picture has aligned fitting bores, which are aligned with the center of the carrier Dowel pins of the printing press correspond.

Ein eingangs genanntes Verfahren wird z.B. beim Bedrucken von CD's mit Hilfe einer Siebdruckmaschine verwendet. Das auf die CD's aufzudruckende Druckbild wird dabei in Form einer Druckfolie angeliefert. Diese Druckfolie muß für das Einbelichten auf dem Drucksieb so befestigt werden, daß beim Druckvorgang das aufzudruckende Druckbild exakt über der zu bedruckenden CD liegt. Dazu ist der Rahmen des Drucksiebes mit sogenannten Paßbohrungen versehen, die mit ortsfesten Paßstiften der Druckmaschine korrespondieren. Dabei sind die Paßbohrungen des Drucksiebes einerseits und die Paßstifte der Druckmaschine andererseits derart angeordnet und ausgebildet, daß nach dem Aufsetzen des Drucksiebes über seine Bohrungen auf die Paßstifte die auf dem Drucksieb angeordnete Mitte des Druckbildes genau über der Mitte der zu bedruckenden CD der Druckmaschine liegt. Dies bedeutet, daß die Paßbohrungen des Drucksiebes genau auf die Bildmitte des Druckbildes und die Paßstifte der Druckmaschine exakt auf die Mitte der zu bedruckenden CD ausgerichtet sind. Daraus folgt, daß die das Druckbild enthaltende Druckfolie exakt auf die Mitte des Drucksiebes aufgebracht werden muß, um Abweichungen zu vermeiden. Bisher wird die Druckfolie in Handarbeit und in Sichtkontrolle zentrisch ausgerichtet. Dazu werden bisher Hilfsfolien verwendet, die mit konzentrischen Kreisen unterschiedlichen Durchmessers versehen sind. Die das Druckbild enthaltende Druckfolie wird sodann von Hand so ausgerichtet, daß das Druckbild innerhalb eines dieser konzentrischen Hilfskreise zu liegen kommt. Diese Art der Ausrichtung des Druckbildes auf die geometrisch richtige Druckposition einer Druckmaschine ist sehr umständlich, zeitaufwendig und vielen Fällen auch ungenau, so daß beim Druckvorgang mehr oder weniger Ausschuß anfällt, da das Druckbild exzentrisch auf der CD angeordnet ist.A method mentioned at the outset is e.g. when printing CDs with the help a screen printing machine used. The printed image to be printed on the CD's is delivered in the form of a printing film. This printing film must be used for Imaging on the printing screen so that the printing process print image to be printed lies exactly over the CD to be printed. This is the Provide the frame of the pressure screen with so-called fitting holes, which with fixed Dowel pins of the printing press correspond. The fitting holes are Printing screen on the one hand and the dowel pins of the printing press on the other hand arranged and designed that after placing the pressure screen on his Bores on the dowel pins located on the center of the pressure screen Print image exactly over the center of the printing press CD lies. This means that the fitting holes of the printing screen exactly on the center of the picture of the printed image and the dowel pins of the printing press exactly in the middle of the printing CD are aligned. It follows that the one containing the printed image Printing film must be applied exactly to the center of the printing screen Avoid deviations. So far, the printing film is handmade and in Visual inspection centered. Up to now, auxiliary foils have been used for this are provided with concentric circles of different diameters. The the Printing film containing the printed image is then aligned by hand so that the Print image comes to lie within one of these concentric auxiliary circles. This Type of alignment of the print image on the geometrically correct print position A printing press is very cumbersome, time consuming and many cases too imprecise, so that more or less waste arises during the printing process, since that Print image is arranged eccentrically on the CD.

Durch die JP 3-268115 (A) ist eine Druckvorrichtung bekannt geworden, bei der mit Hilfe einer oberhalb der Druckfläche angeordneten Kamera eine Justierung der zu bedruckenden Teile vorgenommen werden kann.From JP 3-268115 (A) a printing device has become known in which With the help of a camera arranged above the printing surface, an adjustment of the printing parts can be made.

Der Erfindung liegt die Aufgabe zugrunde, das Ausrichten des Druckbildes auf eine geometrisch richtige Druckposition der Druckmaschine zu vereinfachen und die Genauigkeit der Ausrichtung zu vergrößern.The invention has for its object the alignment of the printed image on a to simplify the geometrically correct printing position of the printing press and the Increase accuracy of alignment.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst,

  • a) daß die Druckfolie mit mindestens zwei auf die Bildmitte ausgerichteten Passermarken versehen und etwa zentrich auf dem Drucksieb befestigt wird,
  • b) daß das Drucksieb verstellbar auf einer optischen Zentriereinrichtung befestigt wird, die mit den Paßstiften der Druckmaschine lageidentische Masterstifte aufweist,
  • c) daß die Passermarken der Druckfolie mit lageidentischen Passermarken der optischen Zentriereinrichtung in Deckung gebracht werden,
  • d) daß auf die Masterstifte Zentrierelemente paßgenau aufgeschoben werden und
  • e) daß die mit den Zentrierelementen versehenen Masterstifte mit Spiel in die radial vergrößerten Paßbohrungen des Drucksiebes eingeführt und in ihrer zentrierten Lage befestigt werden.
    • According to the invention, this object is achieved by
  • a) that the printing film is provided with at least two registration marks aligned with the center of the image and is attached approximately centrally to the printing screen,
  • b) that the printing screen is adjustably attached to an optical centering device which has master pins which are identical in position to the alignment pins of the printing press,
  • c) that the registration marks of the printing film are brought into register with position-identical registration marks of the optical centering device,
  • d) that centering elements are pushed onto the master pins and
  • e) that the master pins provided with the centering elements are inserted with play into the radially enlarged fitting bores of the pressure screen and fastened in their centered position.

    • Auf diese Weise ist es möglich, das auf der Druckfolie angeordnete Druckbild unter Vermeidung einer ungenauen und zeitaufwendigen Handausrichtung auf automatische Weise auf die geometrisch richtige Druckposition der Druckmaschine auszurichten. Dies ist dadurch möglich, daß die das Druckbild enthaltende Druckfolie zurächst mit mindestens zwei Passermarken versehen und grob auf die Mitte des Drucksiebes ausgerichtet und dann befestigt wird. Die Paßbohrungen des Drucksiebes, die bisher paßgenau auf den Durchmesser der auf der Druckmaschine angeordneten Paßstifte ausgerichtet waren, sind jetzt erfindungsgemäß radial in ihrem Durchmesser vergrößert ausgebildet. Das auf diese Weise vorbereitete Drucksieb wird sodann in eine optische Zentriereinrichtung gebracht, die ebenfalls mit Passermarken, z.B. auf Monitoren, versehen ist, die gegenüber den Passermarken der Druckfolie lageidentisch ausgebildet sind. Diese Zentriereinrichtung enthält ferner sogenannte Masterstifte, die mit den Paßstiften der Druckmaschine lageidentisch ausgebildet sind. Sobald die Passermarken der Druckfolie mit den Passermarken der optischen Zentriereinrichtung in Deckung gebracht worden sind, werden auf die an der Zentriereinrichtung angeordneten Masterstifte die mit paßgenauen Bohrungen versehenen Zentrierelemente, z.B. Zentrierbuchsen, aufgeschoben, die danach unter Spiel in die erweiterten Paßbohrungen des Drucksiebes eingeführt werden. Das Einführen geschieht dadurch, daß die Zentriereinrichtung mit den an ihr angeordneten Masterstiften und den aufgeschobenen Zentrierbuchsen in Richtung auf das Drucksieb abgesenkt wird. Nach diesem Vorgang ist das auf dem Drucksieb angeordnete Druckbild exakt in der genau richtigen Druckposition. Danach werden die Zentrierbuchsen in den radial erweiterten Paßbohrungen festgelegt, z.B. durch einen schnell aushärtenden Kleber. Mit dem Verfahren gemäß der Erfindung können die sonst üblichen Paßlochtoleranzen der Druckfolie und des Drucksiebes eliminiert werden.In this way it is possible to place the print image arranged on the printing film Avoid inaccurate and time-consuming hand alignment automatically in the geometrically correct printing position of the printing press align. This is possible because the one containing the printed image Print film is initially provided with at least two registration marks and roughly on the Aligned center of the printing screen and then attached. The fitting holes of the Printing screen, which previously fits the diameter of the press arranged dowel pins were aligned are now radially in accordance with the invention enlarged in diameter. That prepared in this way The printing screen is then brought into an optical centering device, which also with registration marks, e.g. on monitors, which is opposite the Registration marks of the printing film are identical in position. This Centering device also contains so-called master pins that match the dowel pins Printing press are configured identically. As soon as the registration marks of the Printing film with the registration marks of the optical centering device in cover have been brought, are arranged on the centering device Master pins, the centering elements provided with precisely fitting holes, e.g. Centering bushes, pushed on, which then with play in the expanded Fit holes of the pressure screen are introduced. The insertion happens in that the centering device with the master pins arranged on it and the slipped centering bushings is lowered in the direction of the pressure screen. After this process, the print image arranged on the printing screen is exactly in the exactly correct print position. Then the centering bushes in the radial extended fitting holes, e.g. with a quick-curing adhesive. With the method according to the invention, the otherwise usual Fit hole tolerances of the printing film and the printing screen are eliminated.

    Vor Beginn des Verfahrens zur Ausrichtung des auf der Druckfolie angeordneten Druckbildes auf die geometerisch richtige Druckposition der Druckmaschine muß dafür gesorgt werden, daß zum einen die an der Zentriereinrichtung angeordneten Masterstifte ihre richtige Position einnehmen, so daß beim späteren Ausrichten die mit den Zentrierelementen versehenen Masterstifte exakt in die erweiterten Paßbohrungen des Drucksiebes eingeführt werden können. Zum anderen muß dafür gesorgt werden, daß den mit den Kameras verbundenen Monitoren die mit den Passermarken der Druckfolie lageidentischen Passermarken exakt eingeprägt werden.Before starting the process to align the arranged on the printing film Print image on the geometerically correct printing position of the printing press must to ensure that, on the one hand, those arranged on the centering device Master pens take up their correct position so that the later with the master pins provided with the centering elements exactly into the extended ones Fitting holes of the pressure screen can be inserted. On the other hand, for that be ensured that the monitors connected to the cameras are connected to the Registration marks of the printing film are exactly stamped in position-identical registration marks will.

    In Ausgestaltung der Erfindung ist dafür vorgesehen, daß die Justierung der Masterstifte auf das Lochsystem der Druckfolie und die genaue Fixierung der Passermarken auf den Monitoren in besonderen Verfahren mit Hilfe einer auf die Zentriereinrichtung aufsetzbaren Masterplatte erfolgt, die an einer Kante mit den Masterstiften lageidentische Paßlöcher aufweist und die rechtwinklig dazu an einer benachbarten Kante mit einem Lochsystem versehen ist, welches lageidentisch ist mit dem Lochsystem der Druckfolie.In an embodiment of the invention it is provided that the adjustment of the Master pens on the perforation system of the printing film and the exact fixation of the Registration marks on the monitors in special procedures with the help of one on the Centering device attachable master plate is carried out on an edge with the Masterstifte has identical location holes and at right angles to one adjacent edge is provided with a perforation system, which is identical in position with the perforation system of the printing film.

    In Ausgestaltung der Erfindung erfolgt die Justierung der Masterstifte dadurch,

    • daß die Masterplatte über das Lochsystem auf korrespondierende, verstellbare Stifte der Zentriereinrichtung gesetzt wird,
    • daß die Masterstifte der Zentriereinrichtung paßgenau in die Paßlöcher der Masterplatte eingeführt werden und
    • daß danach die Stifte der Zentriereinrichtung arrtiert werden.
    In an embodiment of the invention, the master pins are adjusted by
    • that the master plate is placed on corresponding, adjustable pins of the centering device via the perforation system,
    • that the master pins of the centering device are inserted with a precise fit into the fitting holes of the master plate and
    • that the pins of the centering device are then locked.

    Damit sind die Masterstifte der Zentriereinrichtung exakt auf die Stifte der Zentriereinrichtung und damit auf das Lochsystem der Masterplatte bzw. der Druckfolie ausgerichtet.So that the master pins of the centering device are exactly on the pins of the Centering device and thus on the hole system of the master plate or the Print film aligned.

    In Ausgestaltung der Erfindung erfolgt die exakte Fixierung der Passermarken auf den Monitoren dadurch,

    • daß nach dem Ausrichten der Masterstifte auf das Lochsystem der Masterplatte die Druckfolie über ihr Lochsystem auf die festgelegten Stifte der Zentriereinrichtung gelegt wird,
    • daß die im Bereich oberhalb der Passermarken an der Zentriereinrichtung angeordneten Kameras die Passermarken der Druckfolie erfassen und auf den Monitoren abbilden und
    • daß die Lage der auf den Monitoren abgebildeten Passermarken durch geeignete Mittel fixiert wird.
    In an embodiment of the invention, the registration marks are precisely fixed on the monitors by
    • that after aligning the master pins on the perforation system of the master plate, the printing film is placed on the perforated system on the defined pins of the centering device,
    • that the cameras arranged in the area above the registration marks on the centering device record the registration marks of the printing film and display them on the monitors and
    • that the position of the registration marks shown on the monitors is fixed by suitable means.

    Damit erhält man auf einfache und zuverlässige Weise ein genaues Abbild der auf der Druckfolie vorhandenen Passermarken auf den Monitoren.This gives you a precise and simple image of the on the registration marks on the monitors.

    Die optische Zentriereinrichtung zur Durchführung des erfindungsgemäßen Verfahrens ist dadurch gekennzeichnet,

  • a) daß der in X-Y-Richtung verschiebbare Verstelltisch auf einer Grundplatte der optischen Zentriereinrichtung angeordnet ist,
  • b) daß oberhalb des Verstelltisches eine in senkrechter Richtung verschiebbare Brücke zur Aufnahme und Halterung der Kameras und der Masterstifte vorgesehen ist und
  • c) daß die mit den Zentrierelementen versehenen Masterstifte durch eine Absenkung in senkrechter Richtung in die radial erweiterten Paßbohrungen einführbar sind.
    • The optical centering device for carrying out the method according to the invention is characterized in that
  • a) that the adjustment table, which is displaceable in the XY direction, is arranged on a base plate of the optical centering device,
  • b) that a vertically displaceable bridge for receiving and holding the cameras and the master pins is provided above the adjustment table and
  • c) that the master pins provided with the centering elements can be inserted by lowering them in the vertical direction into the radially enlarged fitting bores.

    • Die Festlegung des Siebrahmens auf dem Verstelltisch erfolgt z.B. durch seitlich angreifende Klemmelemente und Festanschläge derart, daß die Passermarken der Druckfolie im Bereich unterhalb der Kameras zu liegen kommen.The sieve frame is fixed on the adjustment table e.g. through sideways attacking clamping elements and fixed stops such that the registration marks of the Printing film come to rest in the area below the cameras.

    In Ausgestaltung der Erfindung ist vorgesehen, daß die Brücke an ihren beiden Enden über senkrechte Führungen gehalten und absenkbar gelagert angeordnet ist. Nachdem mit Hilfe des in X-Y-Richtung verschiebbaren Verstelltisches die Passermarken der Druckfolie mit denen der Monitore zur Deckung gebracht worden sind, wird die Brücke abgesenkt, so daß die Zentrierelemente in die erweiterten Paßbohrungen eingreifen.In an embodiment of the invention it is provided that the bridge on both of them Ends held over vertical guides and is arranged to be lowered. After using the adjustable table that can be moved in the X-Y direction Registration marks of the printing film have been brought into line with those of the monitors are, the bridge is lowered so that the centering elements in the expanded Intervene fitting holes.

    In der Zeichnung ist in den Fig. 1 bis 6 ein Ausführungsbeispiel des Gegenstandes gemäß der Erfindung schematisch dargestellt.

  • Fig. 1 zeigt eine schematische Seitenansicht einer Druckmaschine mit einem oberhalb derselben angeordneten Drucksieb,
  • Fig. 2 zeigt das Drucksieb gemäß Fig. 1 in einer Draufsicht,
  • Fig. 3 zeigt eine ein Druckbild enthaltende, auf dem Drucksieb gemäß Fig. 2 befestigte Druckfolie,
  • Fig. 4 zeigt eine Seitenansicht einer optischen Zentriereinrichtung, und
  • Fig. 5 zeigt eine schematische Draufsicht gemäß Fig. 4, und
  • Fig. 6 zeigt eine Masterplatte zum Eichen von lageidentischen Zentrierstiften des Lochsystems der Druckfolie zu lageidentischen Masterstiften der Zentriereinrichtung.
    • In the drawing, an embodiment of the object according to the invention is shown schematically in FIGS. 1 to 6.
  • 1 shows a schematic side view of a printing press with a printing screen arranged above it,
  • 2 shows a top view of the printing screen according to FIG. 1,
  • 3 shows a printing film containing a printing image and fastened on the printing screen according to FIG. 2,
  • Fig. 4 shows a side view of an optical centering device, and
  • FIG. 5 shows a schematic top view according to FIG. 4 and
  • 6 shows a master plate for calibrating position-identical centering pins of the perforation system of the printing film to position-identical master pins of the centering device.

    • Auf der Druckmaschine 10 gemäß Fig. 1 liegt eine zu bedruckende CD 11. Oberhalb der Druckmaschine 10 ist ein in Richtung 12 absenkbares Drucksieb 13 angeordnet. Das Drucksieb 13 besitzt gemäß Fig. 2 einen Rahmen 13a und eine auf dem Drucksieb befestigte Druckfolie 14 gemäß Fig. 3. Die Druckfolie 14 enthält das auf die CD 11 zu druckende Druckbild 15. In den Figuren sind die Druckfolie und das Druckbild vergrößert, d.h. nicht maßstabsgetreu, dargestellt. A CD 11 to be printed lies on the printing press 10 according to FIG. 1. Above the printing press 10 is a printing screen 13 which can be lowered in the direction 12 arranged. 2 has a frame 13a and one on The printing film 14 attached to the printing screen according to FIG. 3. The printing film 14 contains the printed image 15 to be printed on the CD 11. The printing film is in the figures and enlarged the print image, i.e. not drawn to scale.

    Der untere Teil des Druckrahmens 13a besitzt zwei radial vergrößerte Paßbohrungen 16, in denen auf weiter unten dargestellte Weise Paßbuchsen 17 durch einen Kleber befestigt sind. Die Paßbuchsen 17 besitzen Bohrungen 18, die paßgenau mit Paßstiften 19 auf der Druckmaschine 10 korrespondieren. Die Paßbuchsen 17 sind derart in den radial erweiterten Paßbohrungen 16 angeordnet und festgelegt, daß beim Aufsetzen des Drucksiebes 13 auf die Druckmaschine 10 die Paßstifte 19 paßgenau in die Bohrungen 18 eingreifen, so daß das Druckbild 15 haargenau oberhalb der zu bedruckenden CD 11 zu liegen kommt. Dadurch wird erreicht, daß das Druckbild 15 genau zentrisch auf die CD 11 übertragen wird, deren Mitte mit 11a bezeichnet ist.The lower part of the pressure frame 13a has two radially enlarged fitting bores 16, in which fitting bushes 17 by an adhesive shown below are attached. The fitting bushes 17 have bores 18 that fit with Dowel pins 19 on the printing press 10 correspond. The fitting sockets 17 are so arranged and fixed in the radially enlarged fitting bores 16 that when the printing screen 13 is placed on the printing press 10, the dowel pins 19 engage precisely in the bores 18 so that the printed image 15 is accurate comes to lie above the CD 11 to be printed. This ensures that the print image 15 is transferred exactly to the center of the CD 11, with its center 11a.

    Gemäß Fig. 4 und 5 ist eine optische Zentriereinrichtung dargestellt, mit deren Hilfe die Bohrungen 18 exakt an die geometrisch richtige Position gebracht werden können. Die optische Zentriereinrichtung gemäß Fig. 4 und 5 enthält eine Grundplatte 20, auf der ein Verstelltisch 21 in X-Y-Richtung verschiebbar angeordnet ist. Die Verstellung in X-Y-Richtung erfolgt auf nicht näher dargestellte Weise über Betätigung von Rändelschrauben 22. Auf dem Verstelltisch 21 ist das Drucksieb 13 mittels Klemmelementen 23 befestigt. Oberhalb des Verstelltisches 21 ist eine in senkrechter Richtung 24 verstellbare Brücke 25 vorgesehen, an der als optische Abtastenrichtungen zwei Kameras 26 und zwei mit den Paßstiften 19 der Druckmaschine 10 lageidentische Masterstifte 27 angeordnet sind. Die Brücke 25 ist an ihren Enden über senkrechte Führungsschienen 28 gehalten und absenkbar gelagert angeordnet.4 and 5, an optical centering device is shown, with the help the holes 18 are brought exactly to the geometrically correct position can. The optical centering device according to FIGS. 4 and 5 contains one Base plate 20 on which an adjustment table 21 is displaceable in the X-Y direction is arranged. The adjustment in the X-Y direction is carried out on not shown Way of operating knurled screws 22. On the adjustment table 21 that is Pressure screen 13 attached by means of clamping elements 23. Above the adjustment table 21 is a bridge 25 adjustable in the vertical direction 24 is provided on the as optical scanning directions two cameras 26 and two with the dowel pins 19 Printing machine 10 positionally identical master pens 27 are arranged. The bridge is 25 held at their ends via vertical guide rails 28 and lowerable stored arranged.

    Die Ausrichtung des auf der Druckfolie 14 angeordneten Druckbildes 15 auf die geometrisch richtige Druckposition der Druckmaschine 10 erfolgt auf nachstehend beschriebene Weise:The orientation of the printed image 15 arranged on the printing film 14 on the The geometrically correct printing position of the printing press 10 is shown below described way:

    Zunächst wird die Druckfolie 14 mit dem Druckbild 15 mit zwei Passermarken 29 versehen, die in einem festen, genau definierten Abstand zum Mittelpunkt 15a des Druckbildes stehen. Danach wird die Druckfolie 14 auf dem Drucksieb 13 in etwa zentrisch befestigt. Das Drucksieb 13 mit der grob justierten Druckfolie 14 wird sodann auf dem Verstelltisch 21 mittels Klemmelementen 23 befestigt. Den beiden Kameras 26 sind Monitore 30 zugeordnet, auf denen mit den Passermarken 29 lageidentische Passermarken 31 markiert sind. Durch Verstellen des Verstelltisches 21 in X-Y-Richtung werden sodann die Passermarken 29 der Druckfolie 14 mit den Passermarken 31 der Monitore 30 in Deckung gebracht. Danach werden die Zentrierbuchsen 17 mit ihren Bohrungen 18 auf die Masterstifte 27 geschoben und durch Absenken der Brücke 25 in die radial erweiterten Paßbohrungen 16 des Drucksiebes 13 eingeführt. Nachdem so die zentrierte Lage erreicht wurde, werden die mit Spiel in den Paßbohrungen 16 liegenden Zentrierbuchsen 17 z.B. durch einen schnell aushärtenden Kleber festgelegt.First, the printing film 14 with the printed image 15 with two registration marks 29 provided that at a fixed, precisely defined distance from the center 15a of the Print image. Then the printing film 14 on the printing screen 13 is approximately attached centrally. The printing screen 13 with the roughly adjusted printing film 14 is then attached to the adjustment table 21 by means of clamping elements 23. The two Cameras 26 are assigned to monitors 30 on which the registration marks 29 location-identical registration marks 31 are marked. By adjusting the adjustment table 21 in the X-Y direction are then the registration marks 29 of the printing film 14 with the Registration marks 31 of the monitors 30 are brought into register. After that, the Centering bushes 17 with their holes 18 pushed onto the master pins 27 and by lowering the bridge 25 into the radially expanded fitting bores 16 of the Printing screen 13 introduced. After the centered position has been reached the centering bushings 17 lying with play in the fitting bores 16 e.g. by set a fast curing adhesive.

    Auf diese Weise ist eine zuverlässige Zentrierung ermöglicht worden, so daß beim Aufsetzen des Drucksiebes 13 auf die Druckmaschine 10 die Paßstifte 19 in die Bohrungen 18 der Zentrierbuchsen eingreifen und somit eine genaue zentrische Lage des Druckbildes 15 im Hinblick auf die zu bedruckende CD 11 erreicht ist.In this way, reliable centering has been made possible so that when Placing the printing screen 13 on the printing press 10, the dowel pins 19 in the Bores 18 of the centering bushes engage and thus an exact central position of the printed image 15 with respect to the CD 11 to be printed is reached.

    Fig. 6 zeigt eine, z.B. aus Aluminium gefertigte massive Masterplatte 32, die an der unteren Kante zwei Paßlöcher 33 und an der benachbarten Kante ein aus drei Löchern bestehendes Lochsystem 34 aufweist. Die Paßlöcher 33 dienen zur paßgenauen Aufnahme der an der Brücke 25 angeordneten Masterstifte 27. Zur Eichung wird die Masterplatte 32 auf den Verstelltisch 21 gelegt, wobei drei auf der Zentriereinrichtung an einer verstellbaren Leiste angeordnete Justierstifte 35 in die Löcher 34 eingreifen. Danach wird die Brücke 25 abgesenkt, so daß die Masterstifte 27 paßgenau in die Paßlöcher 33 eingreifen. Danach wird die Leiste mit den Justierstiften 35 arretiert, so daß nunmehr die Masterstifte 27 in einem festen, unverrückbaren Verhältnis zu den Justierstiften 35 bzw. zu dem Lochsystem 34 stehen. Jetzt wird die Druckfolie 14 so auf die Masterplatte 32 gelegt, daß die Justierstifte 35 in das Lochsystem 14a der Druckfolie 14 eingreifen. Die Lochsysteme 14a und 34 sind lageidentisch zueinander ausgebildet. Dabei sind mit 29a die Stellen bezeichnet, an denen die Passermarken 29 der Druckfolie 14 zu liegen kommen. Nunmehr wird die Brücke 25 mit den Kameras 26 so weit abgesenkt, daß die Passermarken 29 erfaßt und auf den Monitoren als Passermarken 31 abgebildet werden. Durch den vorherigen Eichvorgang ist gewährleistet, daß die Masterstifte 27 genau oberhalb der Paßlöcher 33 liegen. Sobald die auf den Monitoren 30 abgebildeten Passermarken 31 markiert bzw. fixiert sind, ist der Eichvorgang beendet, und die Masterplatte 32 wird entfernt. Danach kann das eigentliche Ausrichten des auf der Druckfolie angeordneten Druckbildes auf die richtige Druckposition beginnen.Fig. 6 shows one e.g. made of aluminum massive master plate 32, which on the lower edge two fitting holes 33 and one of three on the adjacent edge Has holes existing hole system 34. The pass holes 33 are used for precisely fitting recording of the master pins 27 arranged on the bridge 25 Calibration, the master plate 32 is placed on the adjustment table 21, three on the Centering device on an adjustable bar arranged adjusting pins 35 in the Engage holes 34. Then the bridge 25 is lowered so that the master pins 27 engage precisely in the fitting holes 33. Then the bar with the Adjusting pins 35 locked so that the master pins 27 are now in a fixed, immovable relationship to the adjustment pins 35 or to the hole system 34 stand. Now the printing film 14 is placed on the master plate 32 so that the Engage adjusting pins 35 in the hole system 14a of the printing film 14. The Hole systems 14a and 34 are designed identically to one another. Are with 29a designates the points at which the registration marks 29 of the printing film 14 close come to lie. Now the bridge 25 with the cameras 26 is so far lowered that the registration marks 29 detected and on the monitors as registration marks 31 are shown. The previous calibration process ensures that the Master pins 27 lie exactly above the fitting holes 33. As soon as the on the Monitors 30 shown registration marks 31 are marked or fixed is the Calibration ends and the master plate 32 is removed. After that it can actual alignment of the printed image arranged on the printing film on the start correct print position.

    Claims (10)

    1. A method of exactly aligning a printing image (15) relative to a geometrically correct print position of a printing machine (10) for printing carriers (11), for example CDs, the printing foil (14) having a hole system (14a) which has been aligned relative to the image center (15a) and being secured to a printing screen (13) having locating bores which have been aligned relative to the image center (15a) and which correspond to locating pins (19) of the printing machine (10) which have been aligned relative to the carrier center (11a), characterized in that
      a) the printing foil (14) is provided with at least two registration marks (29) which have been aligned relative to the image center (15a) and is secured to the printing screen (13) in a substantially centered relationship,
      b) the printing screen (13) is movably secured to an optical centering device comprising master pins (27) which are positionally identical to the locating pins (19) of the printing machine (10),
      c) the registration marks (29) of the printing foil (14) are brought in register with positionally identical registration marks (31) of the optical centering device,
      d) centering elements (17) are slid onto the master pins (27) with an accurate fit, and
      e) the master pins (27) provided with the centering elements (17) are made to engage the radially enlarged locating bores (16) of the printing screen (13) with clearance and are secured in their centered positions.
    2. A method as claimed in Claim 1, characterized in that
      a) the printing screen (13) with the printing foil (14) is secured in a substantially centered relationship on a positioning table (21) of the optical centering device, which table is movable in X-Y directions,
      b) the registration marks (29) of the printing foil (14) are scanned by two cameras (26) arranged above the positioning table (21) at the location of the registration marks (29) and are displayed on monitors (30) connected to said cameras, and
      c) the registration marks (29) of the printing foil (14) displayed on the monitors (30) are brought in register with the positionally identical registration marks (31) of the centering device which have been fixedly impressed upon the monitors (30).
    3. A method as claimed in Claim 1 or 2, characterized in that after the registration marks (29, 31) have been brought in register the centering device is lowered so far towards the printing screen (13) that the master pins (27) with the slid-on centering elements (17) arranged on the centering device engage the radially enlarged locating bores (16) of the printing screen (13).
    4. A method as claimed in Claim 3, characterized in that the centering elements (17) are secured in the enlarged locating bores (16) by means of a rapidly curing adhesive, for example by means of a two-component adhesive, or by screwing, clamping, (laser) welding or the like.
    5. A method as claimed in any one of the Claims 1 to 4, characterized in that the alignment of the master pins (27) relative to the hole system (14a) of the printing foil (14) and the accurate fixing of the registration marks (31) on the monitors (30) are effected in special processes by means of a master plate (32) which can be fitted onto the centering device and which, near one side, has locating holes (33) which are positionally identical to the master pins (27) and, near an adjoining side perpendicular to said first-mentioned side, has a hole system (34) which is positionally identical to the hole system (14a) of the printing foil (14).
    6. A method as claimed in Claim 5, characterized in that
      by means of its hole system (34) the master plate (32) is placed onto corresponding movable adjustment pins (35) of the centering device,
      the master pins (27) of the centering device are inserted into the locating holes (33) of the master plate (32) with an accurate fit, and
      the adjustment pins (35) are subsequently locked.
    7. A method as claimed in Claim 5 or 6, characterized in that
      after the alignment of the master pins (27) relative to the hole system (34) of the master plate (32) the printing foil (34) is placed onto the locked adjustment pins (35) of the centering device by means of the hole system (14a) of this foil,
      the cameras (26), arranged on the centering device in the area above the registration marks (29), scan the registration marks (29) of the printing foil (14) and display them on the monitors (30), and
      the registration marks (31) displayed on the monitors (30) are locked in position by suitable means.
    8. An optical centering device for carrying out a method as claimed in any one of the Claims 1 to 7, characterized in that
      a) the positioning table (21), which is movable in X-Y directions, has been arranged on a base plate of the optical centering device,
      b) a vertically movable bridge (25) for carrying and holding the cameras (26) and the master pins (27) has been arranged above the positioning table (21), and
      c) the master pins (27) provided with the centering elements (17) are engageable in the radially enlarged locating bores (16) by lowering said bridge in a vertical direction (24).
    9. A centering device as claimed in Claim 8, characterized in that the centering elements are centering sleeves (17), locating plates or the like.
    10. A centering device as claimed in Claim 7, 8 o 9, characterized in that the bridge (25) is mounted and supported at its ends in vertical guide rails (28) so as to allow it to be lowered.
    EP96201641A 1995-06-22 1996-06-12 Method for exact alignment of a printing image on a geometrically correct position in a printing machine Expired - Lifetime EP0749829B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    DE19522676 1995-06-22
    DE19522676A DE19522676A1 (en) 1995-06-22 1995-06-22 Process for the exact alignment of a print image to a geometrically correct print position of a printing press

    Publications (2)

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    EP0749829A1 EP0749829A1 (en) 1996-12-27
    EP0749829B1 true EP0749829B1 (en) 1998-12-09

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    US (1) US5699742A (en)
    EP (1) EP0749829B1 (en)
    JP (1) JPH09109366A (en)
    CN (1) CN1076667C (en)
    AT (1) ATE174264T1 (en)
    DE (2) DE19522676A1 (en)

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    Also Published As

    Publication number Publication date
    US5699742A (en) 1997-12-23
    DE59600940D1 (en) 1999-01-21
    EP0749829A1 (en) 1996-12-27
    DE19522676A1 (en) 1997-01-02
    CN1076667C (en) 2001-12-26
    JPH09109366A (en) 1997-04-28
    ATE174264T1 (en) 1998-12-15
    CN1145853A (en) 1997-03-26

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