EP1138485B1 - Device for secure registration mounting a printing plate on the plate cylinder of a sheet-fed printing machine - Google Patents

Device for secure registration mounting a printing plate on the plate cylinder of a sheet-fed printing machine Download PDF

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Publication number
EP1138485B1
EP1138485B1 EP01104227A EP01104227A EP1138485B1 EP 1138485 B1 EP1138485 B1 EP 1138485B1 EP 01104227 A EP01104227 A EP 01104227A EP 01104227 A EP01104227 A EP 01104227A EP 1138485 B1 EP1138485 B1 EP 1138485B1
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EP
European Patent Office
Prior art keywords
registration
plate
pins
printing plate
printing
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
EP01104227A
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German (de)
French (fr)
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EP1138485A2 (en
EP1138485A3 (en
Inventor
Arnfried Jehring
Andreas Techert
Ralf Zscheile
Christian Ziegenbalg
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Koenig and Bauer AG
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Koenig and Bauer AG
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Publication date
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Publication of EP1138485A2 publication Critical patent/EP1138485A2/en
Publication of EP1138485A3 publication Critical patent/EP1138485A3/en
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Publication of EP1138485B1 publication Critical patent/EP1138485B1/en
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    • 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
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/30—Detecting the correct position of printing plates on the cylinder

Definitions

  • the invention relates to a device for secure register-oriented clamping of a printing plate on the plate cylinder of a sheet-fed press, wherein a printing plate magazine is arranged, in which the printing plate is provided and stored there optionally on pre-mating pins, the plate cylinder arranged in a plate cylinder channel, consisting of a front and a rear clamping device plate clamping device and in the front clamping device, the register-correct position in the lateral and circumferential direction locking and detecting pass elements are arranged, which correspond with introduced into the pressure plate fitting holes.
  • the dowel pins are also arranged isolated from the clamping device and connected to a voltage source and a signal generator.
  • the lateral surface of the dowel pins has an insulation which is partially provided with a conductive portion which is arranged so that only the bottom portion of a dowel hole is detected.
  • the disadvantage is that no failure-proof system can be achieved by any of these devices.
  • the reason for this is that the protective rubber coating customary in the production process of the printing plate can result in undesired coating of the edges of the fitting holes. This prevents the electrical contact of the contact parts of the dowel pins with the pressure plate in this area.
  • the object of the invention is to develop an automatically operating device for eliminating the unwanted coating of a printing plate in the contact area passport pins / pressure plate.
  • DE-U-299 07 123 a device with a fixed upper terminal strip for controlling the register-oriented position of printing plates on the plate cylinder is described, in which, in order to avoid disturbances in the electrical interrogation by impurities in the register holes, the position of the printing plate is detected by detecting the plate leading edge. If the pressure plate with the front edge of fitting pieces, the device is closed by the lower terminal strip is guided against the upper terminal block, wherein dowel fitting dowel pins are guided in a path so that the pressure plate is moved against its feed direction.
  • an apparatus for feeding printing plates with a plate feeding device is known.
  • pre-alignment pins and locating pins on the plate cylinder are arranged.
  • Feed pins and dowel pins are provided with sensor means to check that the plate is in register with the bottom of the dowel holes on the dowel pins and dowel pins.
  • the sensor means are designed as electrical contacts, optical sensors or ultrasonic sensors.
  • the pressure plate is received in the registration holes by the pre-alignment pins and detects whether the plate is properly resting on the pre-alignment pins. If so, the feed pins are pulled out of the registration holes and the plate is transported to the dowel pins. There, the plate is stored with the bottom of the pass holes on the dowel pins, detects the exact positioning by the sensors and closed the clamping device.
  • a pressure plate 1 is temporarily stored in a printing plate magazine 2. This rests there on two spaced pre-pass pins 21a; 21b, which correspond with pass holes in the form of U-shaped cutouts 12a, 12b (see FIG. 2) of the pressure plate 1.
  • the pre-fitting pins 21a; 21b may be provided in one embodiment of the invention with a rough and wear-resistant coating. This can consist of corundum or diamond splinters. In another embodiment, the pre-fit pins 21a; 21b additionally designed so that they can rotate around their own axis.
  • the printing plate magazine 2 is fixedly mounted in its rest position on the frame of the printing press, not shown.
  • a plate cylinder 4 This is intended to record on its surface supplied from the printing plate magazine 2 printing plates 1.
  • a plate cylinder channel 41 is arranged at its periphery in the axis-parallel direction.
  • a plate clamping device 7 This consists of a front clamping device 5 and a rear clamping and Clamping device 6 for receiving the pressure plate end, wherein the front clamping device comprises an upper clamping rail 52 and a lower clamping rail 51.
  • the upper clamping rail 52 is fixedly arranged on the plate cylinder channel 41.
  • the lower clamping rail 51 is displaceable against the upper clamping rail 52 for clamping the pressure plate 1.
  • the front clamping device 5 are assigned in the region of the clamping rails 51, 52 as passport pins 54a, 54b executed passport elements. From Figure 2 it can be seen that the fitting pins 54a, 54b in a finite, the distance between the pre-fitting pins 21a; 21b are arranged corresponding to each other distance.
  • the construction of the pass pins 54a, 54b can be seen in FIG. It can be seen that in the region of the contact surface with the pressure plate 1, that is to say in the region of the side facing the recess 12a, 12b, the pass pins 54a, 54b have a micro-blade 57 projecting on the circumference of the fitting pins 54a, 54b are.
  • the micro-blade 57 is made out of an insert 55 of the dowel pin 54a, 54b.
  • This insert 55 is made of a wear-resistant material, which is subjected to a hardening process.
  • the insert 55 is fixedly connected to the main body 56 of the fitting pin 54a, 54b.
  • the periphery of the dowel pins is partially provided with a rough and wear-resistant coating and rotatably arranged.
  • the printing plate magazine 2 is equipped with a printing plate 1 and moved from its rest position to the position for printing plate change.
  • the plate cylinder 4 is positioned so that a constellation arises, which allows the insertion of a pressure plate 1 in the front clamping device 5. This position is shown in FIG.
  • the printing plate 1 is prepositioned in the printing plate magazine 2 by the pre-pass pin system.
  • a printing plate 1 is released from the printing plate magazine 2 by pulling back the pre-fitting pins 21a, 21b.
  • the conveyor comes into contact with the pressure plate 1, that is, the suction 3 of the conveyor grip the pressure plate 1 and pull it in the direction shown in Figure of the arrow at the indicated angle ⁇ from the pre-fitting pins 21a, 21b.
  • the suction 3 of the conveyor grip the pressure plate 1 and pull it in the direction shown in Figure of the arrow at the indicated angle ⁇ from the pre-fitting pins 21a, 21b.
  • the pre-fitting pins 21a, 21b rotate and thus support the effect or can be dispensed with wholly on the removal of the pressure plate 1 at the angle ⁇ .
  • the rotation occurs briefly after the application of the pressure plate 1 to the pre-fitting pins 21a, 21b. Only then are the pre-fit pins 21a, 21b withdrawn.
  • the suckers 3 take the pressure plate 1 and convey it from the printing plate magazine 2 in the direction of the open front clamping device 5.
  • the lower clamping rail 51 is withdrawn from the upper clamping rail 52 and is located from the upper clamping rail 52 in the am furthest away.
  • the pressure plate 1 With its cutouts 12a; 12b on the fitting pins 54a; 54b driven. If the pressure plate 1 is in the register-oriented desired position (see FIG. 2), the contact is closed by the electrically conductive pressure plate 1 between the fitting pin 54a and the fitting pin 54b. In the process, the micro-blade 57 penetrates the coating possibly present in the cut-out 12a, 12b, thus establishing contact between the fitting pin and 54a, 54b.
  • dowel pins are used whose circumference is partly provided with a rough and wear-resistant coating, a rotation takes place about their axis in this phase. In this case, the dowel pin is rotated until the coating is destroyed and a not provided with the rough coating and electrically conductive portion of the dowel pin comes to rest with the bottom portion of the punch 12a, 12b.
  • the pass pins 54a; 54b of the front clamping device 5 to be provided with a rough and wear-resistant coating and possibly to rotate them.

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  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Abstract

A device for positive alignment and tensioning of a printing plate on a printing machine with a cylindrical platen, using a plate (1) which has a temporary protective coating. The platen cylinder has a recessed channel (41) containing a plate tensioning arrangement comprising a forward clamp unit (5) and a rear clamping and tension unit (6). The forward clamp has locating, electrical contact, elements (54a,54b) which correspond with locating holes in the plate to assure correct lateral and peripheral registering on the platen. The locating elements have an abrasive surface finish to remove, or penetrate, the protective insulating coating in the region of the locating holes, to provide electrically conductive contacts. The abrasive finish on the locating elements may be provided by coating with carborundum powder or diamond dust composition; the locating elements may be rotatable. An alternative system employs micro-blades projecting approximately 0.05 mm from the ends of the locating elements. Preferably the locating holes are formed as U-shaped stampings in the edge of the printing plates. The completion of an electrical circuit through the plates, which are fed from a magazine, is used to signal the correct mounting, on the platen.

Description

Die Erfindung betrifft eine Vorrichtung zum sicheren registergerechten Aufspannen einer Druckplatte auf den Plattenzylinder einer Bogendruckmaschine, wobei ein Druckplatten-Magazin angeordnet ist, in dem die Druckplatte bereitgestellt und dort wahlweise auf Vorpass-Stiften gelagert wird, der Plattenzylinder eine in einem Plattenzylinder-Kanal angeordnete, aus einer vorderen und einer hinteren Klemmeinrichtung bestehende Plattenspanneinrichtung aufweist und in der vorderen Klemmeinrichtung die registergerechte Lage in Seiten- und Umfangsrichtung sichernde und erfassende Pass-Elemente angeordnet sind, die mit in die Druckplatte eingebrachten Passlöchern korrespondieren.The invention relates to a device for secure register-oriented clamping of a printing plate on the plate cylinder of a sheet-fed press, wherein a printing plate magazine is arranged, in which the printing plate is provided and stored there optionally on pre-mating pins, the plate cylinder arranged in a plate cylinder channel, consisting of a front and a rear clamping device plate clamping device and in the front clamping device, the register-correct position in the lateral and circumferential direction locking and detecting pass elements are arranged, which correspond with introduced into the pressure plate fitting holes.

Aus dem DE-GM 77 28 905 ist eine derartige Vorrichtung bekannt, bei der Pass-Stifte in der vorderen Klemmeinrichtung und gegenüber dieser isoliert angeordnet sind. Die Pass-Stifte sind mit einer Spannungsquelle und einem Signalgeber verbunden, so dass bei Kontaktnahme der Pass-Stifte mit den in den Druckplatten vorgesehenen Passlöchern ein Stromkreis geschlossen und damit der Signalgeber aktiviert wird.From DE-GM 77 28 905 such a device is known, are arranged in the passport pins in the front clamping device and against this isolated. The pass pins are connected to a voltage source and a signal generator, so that when contacting the passport pins with the provided in the pressure plates registration holes closed a circuit and thus the signal generator is activated.

Aus der EP 581 212 B1 ist eine Vorrichtung bekannt, bei der die Pass-Stifte ebenfalls gegenüber der Klemmeinrichtung isoliert angeordnet sowie mit einer Spannungsquelle und einem Signalgeber verbunden sind. Darüber hinaus weist die Mantelfläche der Pass-Stifte eine Isolierung auf, die partiell mit einem leitfähigen Abschnitt versehen ist, der so angeordnet ist, dass nur der Bodenbereich eines Passlochs detektiert wird.From EP 581 212 B1, a device is known in which the dowel pins are also arranged isolated from the clamping device and connected to a voltage source and a signal generator. In addition, the lateral surface of the dowel pins has an insulation which is partially provided with a conductive portion which is arranged so that only the bottom portion of a dowel hole is detected.

Nachteilig ist, dass durch keine dieser Vorrichtungen eine störungssichere Anlage erzielbar ist. Grund dafür ist, dass durch die beim Herstellungsprozess der Druckplatte übliche schützende Gummierung eine unerwünschte Beschichtung der Kanten der Passlöcher zur Folge haben kann. Das verhindert den elektrischen Kontakt der kontaktgebenden Teile der Pass-Stifte mit der Druckplatte in diesem Bereich.The disadvantage is that no failure-proof system can be achieved by any of these devices. The reason for this is that the protective rubber coating customary in the production process of the printing plate can result in undesired coating of the edges of the fitting holes. This prevents the electrical contact of the contact parts of the dowel pins with the pressure plate in this area.

Aufgabe der Erfindung ist es, eine automatisch arbeitende Einrichtung zum Beseitigen der ungewollten Beschichtung einer Druckplatte im Kontaktbereich Pass-Stifte/Druckplatte zu entwickeln.The object of the invention is to develop an automatically operating device for eliminating the unwanted coating of a printing plate in the contact area passport pins / pressure plate.

Erfindungsgemäß wird die Aufgabe durch die Merkmale des Anspruchs 1 gelöst.According to the invention the object is achieved by the features of claim 1.

In DE-U-299 07 123 wird eine Einrichtung mit einer feststehenden oberen Klemmleiste zur Kontrolle der registergerechten Lage von Druckplatten auf dem Plattenzylinder beschrieben, bei der, um Störungen bei der elektrischen Abfrage durch Verunreinigungen im Bereich der Registerlöcher zu vermeiden, die Lage der Druckplatte durch ein Erfassen der Plattenvorderkante detektiert wird. Liegt die Druckplatte mit der Vorderkante an Passstücken an, wird die Vorrichtung geschlossen, indem die untere Klemmleiste gegen die obere Klemmleiste geführt wird, wobei in Passlöcher greifende Passstifte so auf einer Bahn geführt werden, dass die Druckplatte entgegen ihrer Zuführrichtung verschoben wird.In DE-U-299 07 123 a device with a fixed upper terminal strip for controlling the register-oriented position of printing plates on the plate cylinder is described, in which, in order to avoid disturbances in the electrical interrogation by impurities in the register holes, the position of the printing plate is detected by detecting the plate leading edge. If the pressure plate with the front edge of fitting pieces, the device is closed by the lower terminal strip is guided against the upper terminal block, wherein dowel fitting dowel pins are guided in a path so that the pressure plate is moved against its feed direction.

Aus der EP-A-0 933 207 ist eine Vorrichtung zum Zuführen von Druckplatten mit einer Plattenzuführvorrichtung bekannt. In der Plattenzuführvorrichtung sind Vorpassstifte und auf dem Plattenzylinder Passstifte angeordnet. Vorpassstifte und Passstifte sind mit Sensormitteln versehen zum Prüfen, ob die Platte mit dem Grund der Passlöcher an den Vorpassstiften und Passstiften anliegt. Die Sensormittel sind als elektrische Kontakte, optische Sensoren oder Ultraschallsensoren ausgebildet. Die Druckplatte wird in den Passlöchern von den Vorpassstiften aufgenommen und detektiert, ob die Platte ordnungsgemäß auf den Vorpassstiften aufliegt. Wenn das der Fall ist, werden die Vorpassstifte aus den Passlöchern herausgezogen und die Platte zu den Passstiften transportiert. Dort wird die Platte mit dem Grund der Passlöcher auf den Passstiften gelagert, die exakte Positionierung durch die Sensoren erfasst und die Klemmvorrichtung geschlossen.From EP-A-0 933 207 an apparatus for feeding printing plates with a plate feeding device is known. In the plate feeder, pre-alignment pins and locating pins on the plate cylinder are arranged. Feed pins and dowel pins are provided with sensor means to check that the plate is in register with the bottom of the dowel holes on the dowel pins and dowel pins. The sensor means are designed as electrical contacts, optical sensors or ultrasonic sensors. The pressure plate is received in the registration holes by the pre-alignment pins and detects whether the plate is properly resting on the pre-alignment pins. If so, the feed pins are pulled out of the registration holes and the plate is transported to the dowel pins. There, the plate is stored with the bottom of the pass holes on the dowel pins, detects the exact positioning by the sensors and closed the clamping device.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, dass nunmehr ohne manuellen Eingriff die Beschichtung an den genannten Stellen beseitigt wird. Dadurch ist eine störungsfreie Detektierung der Druckplatte möglich.The advantages achieved by the invention are, in particular, that now without manual intervention, the coating is eliminated at said locations. As a result, a trouble-free detection of the printing plate is possible.

Die Erfindung soll an einem Ausführungsbeispiel näher erläutert werden.The invention will be explained in more detail using an exemplary embodiment.

Die Zeichnungen hierzu haben folgende Bedeutung:

Figur 1
Schematische Darstellung eines Plattenzylinder mit geöffneter Klemmschiene während des Zuführens einer Druckplatte
Figur 2
Darstellung der registergerechten Anlage der Druckplatte an den Pass-Stiften
Figur 3
Darstellung eines erfindungsgemäßen Pass-Stiftes
The drawings have the following meaning:
FIG. 1
Schematic representation of a plate cylinder with open clamping rail during the feeding of a printing plate
FIG. 2
Representation of the registration of the pressure plate on the passport pins
FIG. 3
Representation of a passport pin according to the invention

Wie aus der Figur 1 ersichtlich ist, ist in einem Druckplatten-Magazin 2 eine Druckplatte 1 zwischengelagert. Diese ruht dort auf zwei in einem Abstand zueinander angeordneten Vorpass-Stiften 21a; 21b, die mit Passlöchern in Form von U-förmigen Ausstanzungen 12a, 12b (siehe hierzu die Figur 2) der Druckplatte 1 korrespondieren.As can be seen from FIG. 1, a pressure plate 1 is temporarily stored in a printing plate magazine 2. This rests there on two spaced pre-pass pins 21a; 21b, which correspond with pass holes in the form of U-shaped cutouts 12a, 12b (see FIG. 2) of the pressure plate 1.

Die Vorpass-Stifte 21a; 21b können in einer Ausführung der Erfindung mit einer rauen und verschleißfesten Beschichtung versehen sein. Diese kann aus Korund oder aus Diamant-Splittern bestehen. In einer weiteren Ausführung sind die Vorpass-Stiften 21a; 21b zusätzlich so ausgeführt, dass diese sich um ihre eigene Achse drehen können.The pre-fitting pins 21a; 21b may be provided in one embodiment of the invention with a rough and wear-resistant coating. This can consist of corundum or diamond splinters. In another embodiment, the pre-fit pins 21a; 21b additionally designed so that they can rotate around their own axis.

Das Druckplatten-Magazin 2 ist in seiner Ruhestellung fest an dem nicht dargestellten Gestell der Druckmaschine angebracht.The printing plate magazine 2 is fixedly mounted in its rest position on the frame of the printing press, not shown.

Ebenfalls im Gestell gelagert ist ein Plattenzylinder 4. Dieser ist dazu bestimmt, auf seiner Oberfläche die aus dem Druckplatten-Magazin 2 zugeführten Druckplatten 1 aufzunehmen. Zu diesem Zwecke ist an seinem Umfang in achsparalleler Richtung ein Plattenzylinder-Kanal 41 angeordnet. Im Plattenzylinder-Kanal 41 befindet sich eine Plattenspanneinrichtung 7. Diese besteht aus einer vorderen Klemmeinrichtung 5 und einer hinteren Klemm- und Spanneinrichtung 6 zur Aufnahme des Druckplatten-Endes, wobei die vordere Klemmeinrichtung eine obere Klemmschiene 52 und eine untere Klemmschiene 51 umfasst. Die obere Klemmschiene 52 ist fest am Plattenzylinder-Kanal 41 angeordnet. Die untere Klemmschiene 51 ist gegen die obere Klemmschiene 52 zum Klemmen der Druckplatte 1 verschiebbar.Also mounted in the frame is a plate cylinder 4. This is intended to record on its surface supplied from the printing plate magazine 2 printing plates 1. For this purpose, a plate cylinder channel 41 is arranged at its periphery in the axis-parallel direction. In the plate cylinder channel 41 is a plate clamping device 7. This consists of a front clamping device 5 and a rear clamping and Clamping device 6 for receiving the pressure plate end, wherein the front clamping device comprises an upper clamping rail 52 and a lower clamping rail 51. The upper clamping rail 52 is fixedly arranged on the plate cylinder channel 41. The lower clamping rail 51 is displaceable against the upper clamping rail 52 for clamping the pressure plate 1.

Der vorderen Klemmeinrichtung 5 sind im Bereich der Klemmschienen 51, 52 als Pass-Stifte 54a, 54b ausgeführte Pass-Elemente zugeordnet. Aus der Figur 2 ist ersichtlich, dass die Pass-Stifte 54a, 54b in einem endlichen, dem Abstand zwischen den Vorpass-Stiften 21a; 21b entsprechenden Abstand zueinander angeordnet sind. Der Aufbau der Pass-Stifte 54a, 54b ist aus der Figur 3 ersichtlich. Es ist erkennbar, dass die Pass-Stifte 54a, 54b im Bereich der Kontaktfläche mit der Druckplatte 1, also im Bereich der der Aussparung 12a, 12b zugewandten Seite, mit einer am Umfang der Pass-Stifte 54a, 54b hervorstehenden Mikro-Schneide 57 versehen sind. Diese weist einen sehr geringen Überstand a zum Umfang der Pass-Stifte 54a, 54b auf. In der Regel sind 0,05 mm bereits ausreichend, um die Beschichtung zu durchstoßen. Die Mikro-Schneide 57 ist aus einem Einsatz 55 des Pass-Stiftes 54a, 54b herausgearbeitet. Dieser Einsatz 55 besteht aus einem verschleißfesten Material, das einem Härte-Prozess unterworfen wird. Der Einsatz 55 ist mit dem Grundkörper 56 des Pass-Stiftes 54a, 54b fest verbunden.The front clamping device 5 are assigned in the region of the clamping rails 51, 52 as passport pins 54a, 54b executed passport elements. From Figure 2 it can be seen that the fitting pins 54a, 54b in a finite, the distance between the pre-fitting pins 21a; 21b are arranged corresponding to each other distance. The construction of the pass pins 54a, 54b can be seen in FIG. It can be seen that in the region of the contact surface with the pressure plate 1, that is to say in the region of the side facing the recess 12a, 12b, the pass pins 54a, 54b have a micro-blade 57 projecting on the circumference of the fitting pins 54a, 54b are. This has a very small projection a to the circumference of the pass pins 54a, 54b. As a rule, 0.05 mm is already sufficient to pierce the coating. The micro-blade 57 is made out of an insert 55 of the dowel pin 54a, 54b. This insert 55 is made of a wear-resistant material, which is subjected to a hardening process. The insert 55 is fixedly connected to the main body 56 of the fitting pin 54a, 54b.

In einer anderen Ausführung ist der Umfang der Pass-Stifte teilweise mit einer rauen und verschleißfesten Beschichtung versehen und drehbar angeordnet.In another embodiment, the periphery of the dowel pins is partially provided with a rough and wear-resistant coating and rotatably arranged.

Das Druckplatten-Magazin 2 wird mit einer Druckplatte 1 bestückt und aus seiner Ruhestellung in die Stellung zum Druckplatten-Wechsel gefahren. Der Plattenzylinder 4 wird so positioniert, dass eine Konstellation entsteht, die das Einführen einer Druckplatte 1 in die vordere Klemmeinrichtung 5 ermöglicht. Diese Stellung ist in der Figur 1 dargestellt.The printing plate magazine 2 is equipped with a printing plate 1 and moved from its rest position to the position for printing plate change. The plate cylinder 4 is positioned so that a constellation arises, which allows the insertion of a pressure plate 1 in the front clamping device 5. This position is shown in FIG.

Die Druckplatte 1 ist im Druckplatten-Magazin 2 durch das Vorpass-Stift-System vorpositioniert. Zum Druckplatten-Wechsel wird eine Druckplatte 1 aus dem Druckplatten-Magazin 2 frei gegeben, indem die Vorpass-Stifte 21a, 21b zurückgezogen werden. Zuvor jedoch tritt die Fördereinrichtung in Kontakt mit der Druckplatte 1, das heißt, die Sauger 3 der Fördereinrichtung ergreifen die Druckplatte 1 und ziehen diese in der in Figur eingezeichneten Richtung des Pfeils unter den gekennzeichneten Winkel α von den Vorpass-Stifte 21a, 21b. Dadurch wird infolge der Relativbewegung zwischen der Oberfläche der Vorpass-Stifte 21a, 21b und den Kanten der Ausstanzungen 12a, 12b die dort vorhandene unerwünschte Beschichtung entfernt. In einer weiteren Ausführung der Erfindung können die Vorpass-Stifte 21a, 21b rotieren und unterstützen so die Wirkung bzw. kann dadurch ganz auf das Abziehen der Druckplatte 1 unter den Winkel α verzichtet werden. Die Rotation erfolgt kurzzeitig nach dem Anlegen der Druckplatte 1 an die Vorpass-Stifte 21a, 21b. Erst dann werden die Vorpass-Stifte 21a, 21b zurückgezogen.The printing plate 1 is prepositioned in the printing plate magazine 2 by the pre-pass pin system. For the printing plate change, a printing plate 1 is released from the printing plate magazine 2 by pulling back the pre-fitting pins 21a, 21b. However, before that, the conveyor comes into contact with the pressure plate 1, that is, the suction 3 of the conveyor grip the pressure plate 1 and pull it in the direction shown in Figure of the arrow at the indicated angle α from the pre-fitting pins 21a, 21b. As a result, due to the relative movement between the surface of the pre-fitting pins 21a, 21b and the edges of the punched-12a, 12b, there is the unwanted coating there away. In a further embodiment of the invention, the pre-fitting pins 21a, 21b rotate and thus support the effect or can be dispensed with wholly on the removal of the pressure plate 1 at the angle α. The rotation occurs briefly after the application of the pressure plate 1 to the pre-fitting pins 21a, 21b. Only then are the pre-fit pins 21a, 21b withdrawn.

Anschließend ergreifen die Sauger 3 die Druckplatte 1 und fördern sie aus dem Druckplatten-Magazin 2 in Richtung der geöffneten vordere Klemmeinrichtung 5. In dieser Stellung ist die untere Klemmschiene 51 von der oberen Klemmschiene 52 zurückgezogen und befindet sich von der oberen Klemmschiene 52 in der am weitesten entfernten Stellung.Subsequently, the suckers 3 take the pressure plate 1 and convey it from the printing plate magazine 2 in the direction of the open front clamping device 5. In this position, the lower clamping rail 51 is withdrawn from the upper clamping rail 52 and is located from the upper clamping rail 52 in the am furthest away.

Innerhalb der Klemmeinrichtung 54a, 54b wird die Druckplatte 1 mit ihren Ausstanzungen 12a; 12b auf die Pass-Stifte 54a; 54b gefahren. Liegt die Druckplatte 1 in der registergerechten Soll-Lage (siehe Figur 2) ist der Kontakt durch die elektrisch leitende Druckplatte 1 zwischen dem Pass-Stift 54a und dem Pass-Stift 54b geschlossen. Dabei durchdringt die Mikro-Schneide 57 die in der Ausstanzung 12a, 12b evtl. vorhandene Beschichtung und stellt so den Kontakt zwischen Pass-Stift und 54a, 54b her.Within the clamping device 54a, 54b, the pressure plate 1 with its cutouts 12a; 12b on the fitting pins 54a; 54b driven. If the pressure plate 1 is in the register-oriented desired position (see FIG. 2), the contact is closed by the electrically conductive pressure plate 1 between the fitting pin 54a and the fitting pin 54b. In the process, the micro-blade 57 penetrates the coating possibly present in the cut-out 12a, 12b, thus establishing contact between the fitting pin and 54a, 54b.

Werden Pass-Stifte angewendet, deren Umfang teilweise mit einer rauen und verschleißfesten Beschichtung versehen ist, so erfolgt in dieser Phase eine Drehung um deren Achse. Dabei wird der Pass-Stift so weit gedreht, bis die Beschichtung zerstört ist und ein nicht mit der rauen Beschichtung versehener und elektrisch leitfähiger Bereich des Pass-Stiftes mit dem Bodenbereich der Ausstanzung 12a, 12b zur Anlage kommt.If dowel pins are used whose circumference is partly provided with a rough and wear-resistant coating, a rotation takes place about their axis in this phase. In this case, the dowel pin is rotated until the coating is destroyed and a not provided with the rough coating and electrically conductive portion of the dowel pin comes to rest with the bottom portion of the punch 12a, 12b.

Ist die registergerechte Soll-Lage analog Figur 2 erreicht, wird ein Signal an die Steuerung der Druckmaschine generiert und damit die vordere Klemmeinrichtung 5 geschlossen. Die weiteren Schritte zum Spannen der Druckplatte 1 können nun eingeleitet werden.If the register-oriented target position is reached analogously to FIG. 2, a signal is generated to the control of the printing press and thus the front clamping device 5 is closed. The further steps for tensioning the printing plate 1 can now be initiated.

Die Erfindung ist nicht auf das oben beschriebene Beispiel und die genannten Varianten beschränkt. So ist es auch möglich, die Pass-Stifte 54a; 54b der vorderen Klemmeinrichtung 5 mit einer rauen und verschleißfesten Beschichtung zu versehen und diese ggf. auch rotieren zu lassen.The invention is not limited to the example described above and the variants mentioned. So it is also possible, the pass pins 54a; 54b of the front clamping device 5 to be provided with a rough and wear-resistant coating and possibly to rotate them.

Aufstellung der verwendeten BezugszeichenList of used reference numbers

11
Druckplatteprinting plate
12a12a
Ausstanzungpunching
12b12b
Ausstanzungpunching
22
Druckplatten-MagazinPrinting plate magazine
21a21a
Vorpass-StiftPre-registration pin
21b21b
Vorpass-StiftPre-registration pin
33
Saugersucker
44
Plattenzylinderplate cylinder
4141
Plattenzylinder-KanalPlate cylinder channel
55
vordere Klemmeinrichtungfront clamping device
5151
untere Klemmschienelower clamping rail
5252
obere Klemmschieneupper clamping rail
54a54a
Pass-StiftDowel pin
54b54b
Pass-StiftDowel pin
5555
Einsatzcommitment
5656
Grundkörperbody
5757
Mikro-SchneideMicro-cutting
66
hintere Klemm- und Spanneinrichtungrear clamping and clamping device
77
PlattenspanneinrichtungDisc chuck
aa
ÜberstandGot over
αα
Winkel zwischen der Achse der Vorpass-Stifte und der AbzugsrichtungAngle between the axis of the pre-fitting pins and the withdrawal direction

Claims (8)

  1. Device for secure tightening of a printing plate correct in registration on the plate cylinder of a sheet printing machine, wherein a printing plate magazine (2) is arranged, in which the printing plate (1) is provided and is selectably mounted there on pre-registration pins (21a; 21b), the plate cylinder (4) comprises a plate tightening device (7), which is arranged in a plate cylinder channel (41) and consists of a front clamping device (5) and a rear clamping and tightening device (6), and registration elements, which secure and capture the position correct in registration in lateral and circumferential direction and which correspond with registration holes (12a, 12b) formed in the printing plate (1), are arranged in the front clamping device (5), characterised in that the pre-registration pins (21 a, 21 b) and/or the registration elements (54a; 54b) are provided with a rough surface for contact-making removal of a temporary protective coating of the printing plate in the region of the registration holes (12a; 12b) and/or with means for penetration of coatings of that kind.
  2. Device for secure tightening of a printing plate correct in registration on the plate cylinder of a sheet printing machine according to claim 1, characterised in that the registration holes are executed as U-shaped punched-out areas (12a; 12b).
  3. Device for secure tightening of a printing plate correct in registration on the plate cylinder of a sheet printing machine according to claim 1, characterised in that the surface of the pre-registration pins (21a; 21b) and/or the registration elements constructed as registration pins (54a; 54b) is formed as a hard and wear-resistant coating.
  4. Device for secure tightening of a printing plate correct in registration on the plate cylinder of a sheet printing machine according to claim 1 and 3, characterised in that the surface of the pre-registration pins (21a; 21b) is coated with corundum or diamond.
  5. Device for secure tightening of a printing plate correct in registration on the plate cylinder of a sheet printing machine according to claim 1 and 3, characterised in that the circumference of the registration pins (54a, 54b) is partly coated with corundum or diamond.
  6. Device for secure tightening of a printing plate correct in registration on the plate cylinder of a sheet printing machine according to claim 1, characterised in that the registration pins (54a; 54b) are provided in the region of the contact surface of the printing plate (1) with a micro-cutting edge (57) protruding at the circumference of the registration pins (54a; 54b).
  7. Device for secure tightening of a printing plate correct in registration on the plate cylinder of a sheet printing machine according to claim 6, characterised in that the projection (a) of the micro-cutting edge (57) is 0.05 millimetres.
  8. Device for secure tightening of a printing plate correct in registration on the plate cylinder of a sheet printing machine according to claim 1 and 2, characterised in that the pre-registration pins (21a; 21b) and/or the registration pins (54a; 54b) are rotatable about the axis thereof.
EP01104227A 2000-03-29 2001-02-22 Device for secure registration mounting a printing plate on the plate cylinder of a sheet-fed printing machine Expired - Lifetime EP1138485B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10015727 2000-03-29
DE10015727A DE10015727A1 (en) 2000-03-29 2000-03-29 Abrasive, conductive, locating dowels for electrical checking of printing plate alignment on platen press engage with locating holes in plate to assure correct lateral and peripheral register

Publications (3)

Publication Number Publication Date
EP1138485A2 EP1138485A2 (en) 2001-10-04
EP1138485A3 EP1138485A3 (en) 2003-08-20
EP1138485B1 true EP1138485B1 (en) 2007-05-30

Family

ID=7636908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01104227A Expired - Lifetime EP1138485B1 (en) 2000-03-29 2001-02-22 Device for secure registration mounting a printing plate on the plate cylinder of a sheet-fed printing machine

Country Status (3)

Country Link
EP (1) EP1138485B1 (en)
AT (1) ATE363394T1 (en)
DE (3) DE10015727A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008029195A1 (en) 2008-06-19 2009-12-24 Koenig & Bauer Aktiengesellschaft Pressure plate for mounting on plate cylinder of rotary pressure machine, is made of electrical conducting material, and preserving coating is provided on entire surface of pressure plate

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7728905U1 (en) * 1977-09-17 1979-01-04 Register System Gmbh, 8000 Muenchen DEVICE FOR REGISTERING ALIGNMENT OF PRINT PLATES
DE3438931A1 (en) * 1984-10-24 1986-04-24 Heidelberger Druckmaschinen Ag, 6900 Heidelberg DEVICE FOR ADJUSTING A FLEXIBLE PRINT PLATE ON THE PLATE CYLINDER OF ROTARY PRINTING MACHINES
DE3443178A1 (en) * 1984-11-27 1986-05-28 Hoechst Ag, 6230 Frankfurt METHOD FOR POSITIONING PRINTING FORMS BEFORE PUNCHING REGISTER HOLES AND ARRANGEMENT FOR CARRYING OUT THE METHOD
DE3539586A1 (en) * 1985-11-08 1987-05-14 Roland Man Druckmasch METHOD FOR APPLYING A PROTECTIVE COATING TO A PRINTING CYLINDER WITH DEVICES FOR CARRYING OUT THE METHOD
JP2573523Y2 (en) * 1992-07-31 1998-06-04 株式会社小森コーポレーション Plate mounting device for printing press
DE19803723A1 (en) * 1998-01-30 1999-08-05 Heidelberger Druckmasch Ag Method and device for pre-positioning a printing plate in register
DE19839149C1 (en) * 1998-08-28 2000-01-20 Roland Man Druckmasch Monitoring in-register plate positioning for printing machine cylinder
DE29907123U1 (en) * 1999-04-22 1999-07-01 MAN Roland Druckmaschinen AG, 63075 Offenbach Device for checking the position of printing plates

Also Published As

Publication number Publication date
DE50112545D1 (en) 2007-07-12
EP1138485A2 (en) 2001-10-04
ATE363394T1 (en) 2007-06-15
DE10015727A1 (en) 2001-10-04
EP1138485A3 (en) 2003-08-20
DE20101038U1 (en) 2001-04-26

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