EP0425935B1 - Device for the parallel tensioning of printing plates - Google Patents

Device for the parallel tensioning of printing plates Download PDF

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Publication number
EP0425935B1
EP0425935B1 EP90120083A EP90120083A EP0425935B1 EP 0425935 B1 EP0425935 B1 EP 0425935B1 EP 90120083 A EP90120083 A EP 90120083A EP 90120083 A EP90120083 A EP 90120083A EP 0425935 B1 EP0425935 B1 EP 0425935B1
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EP
European Patent Office
Prior art keywords
tensioning
pressure bar
rail
cylinder
supported
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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
EP90120083A
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German (de)
French (fr)
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EP0425935A2 (en
EP0425935A3 (en
Inventor
Manfred Herold
Herbert Rebel
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Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT90120083T priority Critical patent/ATE101360T1/en
Publication of EP0425935A2 publication Critical patent/EP0425935A2/en
Publication of EP0425935A3 publication Critical patent/EP0425935A3/en
Application granted granted Critical
Publication of EP0425935B1 publication Critical patent/EP0425935B1/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
    • B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B41F27/1225—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly
    • B41F27/1231—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly by translatory motion substantially tangential to support surface

Definitions

  • the invention relates to a device for parallel clamping of printing plates on a plate cylinder according to the preamble of the first claim.
  • Such a device is known (DE-PS 3 516 682) and is used so that printing plates can be clamped in parallel with a defined clamping force in order to achieve register accuracy, but at the same time, during the final clamping, the known correction options of the printed image with a divided clamping rail and the associated clamping screws maintain. It is difficult to manufacture and assemble the construction parts so precisely that the rear split tensioning rail is advanced exactly parallel to the front duct wall. An overload of the pressure plate cannot be excluded. Automatic re-tensioning is not possible while the machine is running.
  • the object of the invention is to improve the input-specified device so that a regulation of the tension of printing plates and their automatic re-tensioning is made possible uniformly over the entire width, especially in the case of large-format printing machines.
  • the plate cylinder 1 of a printing press has means for fastening and tensioning printing plates in a cylinder channel 2.
  • these fastening means are designed as a front tensioning rail 3 divided over the length of the plate cylinder 1 and a correspondingly divided rear tensioning rail 4, and are each arranged at the start of print 5 and at the end of print 6 of the cylinder channel 2.
  • the divided clamping rails 3, 4 are arranged in a known manner in the cylinder channel 2 and are actuated by means of clamping screws 10, 11.
  • the pressure plate front edge and the pressure plate rear edge are also clamped in a known manner by clamping devices 21, 22.
  • the front clamping rail 3 and the rear clamping rail 4 are arranged in a known manner on parallel guides, not shown and displaceable in the tangential or approximately tangential direction.
  • the pressure plate is arranged in the front clamping rail 3 in a known manner fixed in a zero position, for. B. with the help of dowel bolts.
  • the quick-action clamping device consists of a pressure bar 9 arranged along the cylinder channel 2 in a recess 7 of the plate cylinder 1 which runs behind the channel wall 8 and which is displaceable along the cylinder channel 2.
  • the pressure bar 9 has two recesses 13 one above the other with an inclined plane, which slide on wedge surfaces on counterparts 14, so that a parallel movement of the pressure bar 9 in the circumferential direction can be carried out to quickly clamp the pressure plate.
  • tensioning levers 15, 16 are arranged mirror-inverted to one another along the contact surface of the pressure bar 9, with each tensioning screw 11 being assigned a tensioning lever 15 and 16, respectively.
  • the mirror image arrangement is not absolutely necessary.
  • the tensioning levers 15, 16 are supported on the pressure bar 9 by means of a molded-on cam 17 with lever transmission.
  • One end of each of the clamping levers 15, 16 is connected to the split rear clamping rail 4 by means of a swivel joint 18 (FIG. 4).
  • the other free end of the tensioning lever 15, 16 is supported under the action of a spring 12 supported by a cylinder on a stop bolt 19 which is fastened on the connecting line of the joints 18 in the rear tensioning rail 4.
  • the pivot levers 15, 16 are supported on the counterpart 14 via the cams 17 and the lower recess 13 of the pressure bar 9 from, while the clamping screws 11 of the upper recess 13 opposite to the pressure bar 9 can be supported.
  • the pressure bar 9 can be actuated from a central position in the middle of the cylinder by its adjusting spindle 20, which is arranged in the axial direction between the front tensioning rail 3 and the rear tensioning rail 4 and can be displaced in the tangential direction and can be provided with a hexagon or a knurling or a quick tensioning device with a ratchet .
  • a spindle nut 23 is provided which is displaceable in the axial direction and which is firmly connected to the pressure bar 9 via a bridge 24.
  • the adjusting spindle 20 is supported with its spherical end faces on both sides on support walls 25 via unequal pressure pieces 29, 30, which are interchangeable, so that the clamping range can be expanded by moving these parts and different long pressure plates can be tensioned uniformly (Figure 5).
  • the plate cylinder 1 is rotated by one turn to place the printing plate.
  • the trailing end of the pressure plate is then clamped in the clamping device 21.
  • the spring 12 arranged in the tangential direction is supported on the support walls 25. It may be advantageous to arrange the support wall so that it can be adjusted relative to the plate cylinder 1 in order to be able to increase or decrease the plate tension over the changed spring travel of the spring 12 supported on the support wall.
  • adjusting screws 27 are also provided in a known manner, which are supported on the rear clamping rail 4 on an arm 28 provided in the cylinder center plane, while on the front clamping rail 3 they are supported on the outside of the cylinder side walls.
  • the register correction in the circumferential direction is carried out in a known manner by means of the tensioning screws 11, in which case the spring 12 relaxes.
  • the free end of the clamping levers 15, 16 abuts the stop pin 19.
  • the tensioning of the pressure plate takes place during the correction process via the tensioning screws 11, whereby a combined use of the tensioning screw 11 or tensioning springs 12 is also possible after the direction of correction.
  • they In order to bring the clamping screws 11 into operation, they only have to be turned into the distance "a" (time advantage). Play changes in the adjusting means, in particular clamping screws 11, do not occur.
  • the front one Tensioning rail 3 is also supported on the support wall 25 by a compression spring 26 arranged in the tangential direction.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Devices For Checking Fares Or Tickets At Control Points (AREA)

Abstract

In order that the tension, particularly of large printing plates, and their automatic retensioning, may be regulated uniformly over the entire width without having an adverse effect on the final tensioning by means of tensioning screws (11), a tensioning lever (15, 16) is associated with each tensioning screw and is pivotally connected to a divided rear tensioning bar (4). The tensioning levers bear via lugs (17) on a pressure strip (9) movable in the cylinder gap, there being springs (12) acting on the free ends of the levers.

Description

Die Erfindung betrifft eine Vorrichtung zum parallelen Spannen von Druckplatten auf einem Plattenzylinder gemäß dem Oberbegriff des ersten Patentanspruches.The invention relates to a device for parallel clamping of printing plates on a plate cylinder according to the preamble of the first claim.

Eine derartige Vorrichtung ist bekannt (DE-PS 3 516 682) und dient dazu, daß Druckplatten mit definierter Spannkraft parallel gespannt werden können, um Passergenauigkeit zu erreichen, zugleich aber beim endgültigen Spannen die bekannten Korrekturmöglichkeiten des Druckbildes mit einer geteilten Spannschiene und den zugehörigen Spannschrauben aufrecht zu erhalten. Es ist schwierig, die Konstruktionsteile so genau zu fertigen und zu montieren, daß die hintere geteilte Spannschiene zur vorderen Kanalwand exakt parallel vorgeschoben wird. Eine Überlastung der Druckplatte ist nicht auszuschließen. Ein selbsttätiges Nachspannen während des Maschinenlaufes ist nicht möglich.Such a device is known (DE-PS 3 516 682) and is used so that printing plates can be clamped in parallel with a defined clamping force in order to achieve register accuracy, but at the same time, during the final clamping, the known correction options of the printed image with a divided clamping rail and the associated clamping screws maintain. It is difficult to manufacture and assemble the construction parts so precisely that the rear split tensioning rail is advanced exactly parallel to the front duct wall. An overload of the pressure plate cannot be excluded. Automatic re-tensioning is not possible while the machine is running.

Aufgabe der Erfindung ist es, die eingangsspezifizierte Vorrichtung so zu verbessern, daß ein Regulieren der Spannung von Druckplatten und deren selbsttätiges Nachspannen gleichmäßig über die ganze Breite ermöglicht wird, insbesondere bei großformatigen Druckmaschinen.The object of the invention is to improve the input-specified device so that a regulation of the tension of printing plates and their automatic re-tensioning is made possible uniformly over the entire width, especially in the case of large-format printing machines.

Gelöst wird diese Aufgabe durch eine Vorrichtung entsprechend dem Kennzeichen des ersten Patentanspruchs. Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.This object is achieved by a device according to the characterizing part of the first claim. Further developments of the invention result from the subclaims.

Die Erfindung wird nachstehend an einem Ausführungsbeispiel näher erläutert. In der zugehörigen Zeichnung zeigt

Figur 1
eine Draufsicht auf die den Kanal zeigende Seite des Plattenzylinders,
Figur 2
einen Längsschnitt durch den Plattenzylinder gemäß Figur 1,
Figur 3
den Schnitt A - B nach Figur 1, vereinfacht,
Figur 4
einen Schnitt durch den Drehpunkt der Spannhebel in der hinteren Spannschiene der Plattenspannvorrichtung
Figur 5
die Betätigungsvorrichtung als Einzelheit,
Figur 6
eine Einzelheit der Plattenspannvorrichtung,
Figur 7
eine weitere Einzelheit der Plattenspannvorrichtung.
The invention is explained in more detail below using an exemplary embodiment. In the accompanying drawing shows
Figure 1
a plan view of the side of the plate cylinder showing the channel,
Figure 2
2 shows a longitudinal section through the plate cylinder according to FIG. 1,
Figure 3
the section A - B of Figure 1, simplified,
Figure 4
a section through the pivot point of the clamping lever in the rear clamping rail of the plate clamping device
Figure 5
the actuating device as a detail,
Figure 6
a detail of the plate clamping device,
Figure 7
another detail of the plate jig.

Der Plattenzylinder 1 einer Druckmaschine weist in einem Zylinderkanal 2 Mittel zum Befestigen und Spannen von Druckplatten auf. Diese Befestigungsmittel sind gemäß Figur 1 und 3 als vordere über die Länge des Plattenzylinders 1 geteilte Spannschiene 3 und eine entsprechend geteilte hintere Spannschiene 4 ausgebildet und jeweils am Druckanfang 5 und am Druckende 6 des Zylinderkanals 2 angeordnet. Die geteilten Spannschienen 3, 4 sind in bekannter Weise im Zylinderkanal 2 angeordnet und werden mittels Spannschrauben 10, 11 betätigt. In den Spannschienen 3, 4 werden ebenfalls in bekannter Weise die Druckplattenvorderkante sowie die Druckplattenhinterkante durch Klemmeinrichtungen 21, 22 geklemmt. Die vordere Spannschiene 3 und die hintere Spannschiene 4 sind auf nicht dargestellten Parallelführungen in bekannter Weise angeordnet und in tangentialer oder annähernd tangentialer Richtung verschiebbar.The plate cylinder 1 of a printing press has means for fastening and tensioning printing plates in a cylinder channel 2. According to FIGS. 1 and 3, these fastening means are designed as a front tensioning rail 3 divided over the length of the plate cylinder 1 and a correspondingly divided rear tensioning rail 4, and are each arranged at the start of print 5 and at the end of print 6 of the cylinder channel 2. The divided clamping rails 3, 4 are arranged in a known manner in the cylinder channel 2 and are actuated by means of clamping screws 10, 11. In the clamping rails 3, 4, the pressure plate front edge and the pressure plate rear edge are also clamped in a known manner by clamping devices 21, 22. The front clamping rail 3 and the rear clamping rail 4 are arranged in a known manner on parallel guides, not shown and displaceable in the tangential or approximately tangential direction.

Die Druckplatte ist in der vorderen Spannschiene 3 in bekannter Weise in einer Nullage fixiert angeordnet, z. B. mit Hilfe von Paßbolzen.The pressure plate is arranged in the front clamping rail 3 in a known manner fixed in a zero position, for. B. with the help of dowel bolts.

Die Schnellspanneinrichtung besteht aus einer längs des Zylinderkanals 2 in einer hinter der Kanalwand 8 parallel zu dieser verlaufenden Aussparung 7 des Plattenzylinders 1 angeordneten Druckleiste 9, die längs des Zylinderkanals 2 verschiebbar ist. Die Druckleiste 9 weist übereinanderliegend zwei Aussparungen 13 mit einer schiefen Ebene auf, die auf Keilflächen an Gegenstücken 14 gleiten, so daß eine parallele Bewegung der Druckleiste 9 in Umfangsrichtung zum Schnell spannen der Druckplatte ausführbar ist.The quick-action clamping device consists of a pressure bar 9 arranged along the cylinder channel 2 in a recess 7 of the plate cylinder 1 which runs behind the channel wall 8 and which is displaceable along the cylinder channel 2. The pressure bar 9 has two recesses 13 one above the other with an inclined plane, which slide on wedge surfaces on counterparts 14, so that a parallel movement of the pressure bar 9 in the circumferential direction can be carried out to quickly clamp the pressure plate.

Unterhalb der geteilten hinteren Spannschiene 4 sind zueinander spiegelbildlich mindestens 4 Spannhebel 15, 16 längs der Auflagefläche der Druckleiste 9 angeordnet, wobei jeder Spannschraube 11 ein Spannhebel 15 bzw. 16 zugeordnet ist. Die spiegelbildliche Anordnung ist nicht zwingend erforderlich. Die Spannhebel 15, 16 sind über einen angeformten Hocken 17 mit Hebelübersetzung auf der Druckleiste 9 abgestützt. Ein Ende jedes der Spannhebel 15, 16 ist mit der geteilten hinteren Spannschiene 4 mittels eines Drehgelenkes 18 verbunden (Figur 4). Das andere freie Ende des Spannhebels 15, 16 ist unter der Wirkung einer zylinderfest abgestützten Feder 12 auf einem Anschlagbolzen 19 abgestützt, welcher auf der Verbindungslinie der Gelenke 18 in der hinteren Spannschiene 4 befestigt ist. Die Schwenkhebel 15, 16 stützen sich über die Nocken 17 und die untere Aussparung 13 der Druckleiste 9 am Gegenstück 14 ab, während die Spannschrauben 11 der oberen Aussparung 13 gegenüberliegend an der Druckleiste 9 abstützbar sind.Below the split rear tensioning rail 4, at least 4 tensioning levers 15, 16 are arranged mirror-inverted to one another along the contact surface of the pressure bar 9, with each tensioning screw 11 being assigned a tensioning lever 15 and 16, respectively. The mirror image arrangement is not absolutely necessary. The tensioning levers 15, 16 are supported on the pressure bar 9 by means of a molded-on cam 17 with lever transmission. One end of each of the clamping levers 15, 16 is connected to the split rear clamping rail 4 by means of a swivel joint 18 (FIG. 4). The other free end of the tensioning lever 15, 16 is supported under the action of a spring 12 supported by a cylinder on a stop bolt 19 which is fastened on the connecting line of the joints 18 in the rear tensioning rail 4. The pivot levers 15, 16 are supported on the counterpart 14 via the cams 17 and the lower recess 13 of the pressure bar 9 from, while the clamping screws 11 of the upper recess 13 opposite to the pressure bar 9 can be supported.

Von zentraler Stelle in Zylindermitte ist die Druckleiste 9 durch Seine in Achsrichtung zwischen der vorderen Spannschiene 3 und der hinteren Spannschiene 4 angeordnete drehbare und in tangentialer Richtung verschiebbare Stellspindel 20 betätigbar, die mit einem Sechskant bzw. einer Rändelung oder einer Schnellverspannung mit Ratsche versehen werden kann. Auf der Stellspindel 20 ist eine Spindelmutter 23 in Achsrichtung verschiebbar vorgesehen, die über eine Brücke 24 fest mit der Druckleiste 9 verbunden ist. Die Stellspindel 20 ist mit ihren balligen Stirnseiten beidseitig an Stützwänden 25 über ungleiche Druckstücke 29, 30 abgestützt, die gegeneinander vertauschbar sind, so daß durch Umsetzen dieser Teile der Spannbereich erweitert werden kann und unterschiedliche lange Druckplatten gleichmäßig gespannt werden können (Figur 5).The pressure bar 9 can be actuated from a central position in the middle of the cylinder by its adjusting spindle 20, which is arranged in the axial direction between the front tensioning rail 3 and the rear tensioning rail 4 and can be displaced in the tangential direction and can be provided with a hexagon or a knurling or a quick tensioning device with a ratchet . On the adjusting spindle 20, a spindle nut 23 is provided which is displaceable in the axial direction and which is firmly connected to the pressure bar 9 via a bridge 24. The adjusting spindle 20 is supported with its spherical end faces on both sides on support walls 25 via unequal pressure pieces 29, 30, which are interchangeable, so that the clamping range can be expanded by moving these parts and different long pressure plates can be tensioned uniformly (Figure 5).

Sobald das vordere Plattenende in der Klemmeinrichtung 22 geklemmt ist, wird der Plattenzylinder 1 zum Auflegen der Druckplatte um eine Umdrehung verdreht. Danach wird das nachlaufende Ende der Druckplatte in der Klemmeinrichtung 21 geklemmt.As soon as the front plate end is clamped in the clamping device 22, the plate cylinder 1 is rotated by one turn to place the printing plate. The trailing end of the pressure plate is then clamped in the clamping device 21.

In einer ersten Phase drücken die Spannhebel 15, 16 die Druckleiste 9 gegen ihre Kanalwand. Die Federkraft ist in Figur 6 mit P₂ vorgegeben, der Federweg mit a.In a first phase, the tension levers 15, 16 press the pressure bar 9 against their channel wall. The spring force is given in Figure 6 with P₂, the travel with a.

In einer letzten Phase werden gemäß Figur 7 beim Vorschieben der Druckleiste 9 die freien Enden der Spannhebel 15, 16 um das Gelenk 18 vom Anschlagbolzen 19 unter Anspannung der Feder 12 auf P₁ abgeschwenkt. Dadurch werden in Umfangsrichtung infolge Regulierung der Spannung bei selbsttätigem Nachspannen gleichmäßige Zugkräfte durch die Feder 12 über entsprechend der Zahl der Spannschrauben 11 vorgesehene Spannhebel 15, 16 auf die geteilte hintere Spannschiene 4 und somit auf die Druckplatte ausgeübt.In a last phase, the free ends of the tension levers 15, 16 are pivoted about the joint 18 from the stop bolt 19 under tension of the spring 12 to P 1 according to FIG. This results in uniform tensile forces in the circumferential direction due to regulation of the tension with automatic re-tensioning exerted by the spring 12 via the tensioning levers 15, 16 provided according to the number of tensioning screws 11 on the divided rear tensioning rail 4 and thus on the pressure plate.

Die in tangentialer Richtung angeordnete Feder 12 ist auf den Stützwänden 25 abgestützt. Es kann vorteilhaft sein, die Stützwand gegenüber dem Plattenzylinder 1 verstellbar anzuordnen, um die Plattenspannung über den geänderten Federweg der sich auf der Stützwand abstützenden Feder 12 vergrößern oder verkleinern zu können.The spring 12 arranged in the tangential direction is supported on the support walls 25. It may be advantageous to arrange the support wall so that it can be adjusted relative to the plate cylinder 1 in order to be able to increase or decrease the plate tension over the changed spring travel of the spring 12 supported on the support wall.

Zur Passerkorrektur in axialer Richtung sind außerdem in bekannter Weise Stellschrauben 27 vorgesehen, die sich bei der hinteren Spannschiene 4 an einem in der Zylindermittelebene vorgesehenen Arm 28 abstützen, während sie bei der vorderen Spannschiene 3 außen an Zylinderseitenwänden abgestützt sind.For correcting the register in the axial direction, adjusting screws 27 are also provided in a known manner, which are supported on the rear clamping rail 4 on an arm 28 provided in the cylinder center plane, while on the front clamping rail 3 they are supported on the outside of the cylinder side walls.

Die Passerkorrektur in Umfangsrichtung erfolgt in bekannter Weise mittels der Spannschrauben 11, wobei hierbei die Feder 12 entspannt. Das freie Ende der Spannhebel 15, 16 liegt am Anschlagbolzen 19 an. Die Spannung der Druckplatte erfolgt beim Korrekturvorgang über die Spannschrauben 11, wobei nach Korrekturrichtung auch ein kombinierter Einsatz der Spannschraube 11 oder Spannfedern 12 möglich ist. Um die Spannschrauben 11 in Funktion zu bringen, müssen sie lediglich in den Abstand "a" verdreht werden (Zeitvorteil). Spielwechsel in den Stellmitteln, insbesondere Spannschrauben 11 tritt nicht auf.The register correction in the circumferential direction is carried out in a known manner by means of the tensioning screws 11, in which case the spring 12 relaxes. The free end of the clamping levers 15, 16 abuts the stop pin 19. The tensioning of the pressure plate takes place during the correction process via the tensioning screws 11, whereby a combined use of the tensioning screw 11 or tensioning springs 12 is also possible after the direction of correction. In order to bring the clamping screws 11 into operation, they only have to be turned into the distance "a" (time advantage). Play changes in the adjusting means, in particular clamping screws 11, do not occur.

Um ein ungewolltes Verschieben der vorderen Spannschiene 3 in den nicht dargestellten Führungen zu verhindern, ist die vordere Spannschiene 3 durch eine in tangentialer Richtung angeordnete Druckfeder 26 ebenfalls an der Stützwand 25 abgestützt.

Figure imgb0001
In order to prevent unwanted displacement of the front tensioning rail 3 in the guides, not shown, the front one Tensioning rail 3 is also supported on the support wall 25 by a compression spring 26 arranged in the tangential direction.
Figure imgb0001

Claims (3)

  1. Device for parallel tensioning of printing plates on the plate cylinder of printing presses with a divided front and a divided rear tensioning rail in the cylinder channel of the plate cylinder to which the printing plate ends can be clamped tensioned and which are movable essentially in the peripheral direction of the plate cylinder by tensioning screws lying apart from one another in the axial direction, wherein the tensioning screws of the front tensioning rail support themselves directly on the channel wall standing opposite them and the rear tensioning bar can be tensioned with a rapid tensioning unit which has a series switching from a rapid tensioning mechanism for pre-tensioning and the tensioning screws to a final tensioning, wherein as rapid tensioning mechanism along the cylinder channel in a gap running in the rear plane of the channel wall and parallel to this of the plate cylinder a pressure bar is arranged on which the tensioning screws of the rear tensioning rail are supportable, and further on the pressure bar recesses with an inclined plane are provided whose corresponding wedge surfaces are arranged relative to a counterpiece and the pressure bar is displaceable by means of a central actuation unit in the direction of the cylinder channel, whereby the pressure bar is moved together with the rear tensioning rail in the peripheral direction, characterised in that arranged with respect to each tensioning screw (11) is a tensioning lever (15, 16), which is arranged along the pressure bar (9) below the rear tensioning rail (4), that the tensioning levers (15, 16) are supported via a bead (17) formed thereon with a force increasing lever ratio against the pressure bar (9), whereby at one end of the tensioning lever (15, 16) is swivellably connected with the divided rear tensioning rail (4) by means of a pivot (18) and the other free end of the tensioning lever (15, 16) is supported on a stop pin (19) under the action of a spring (12) supported fast with respect to the cylinder (25), which is fixed on the connection line of the pivots (18) in the rear tensioning rail (4) and that on shifting the pressure bar (9) by means of the actuation device (20, 23, 24, 25) from one position (Figure 6), the free ends of the swivelling lever (16) are swivellable about the respective pivot (18) away from the stop pin (19) with increased force on the spring (12) (Figure 7).
  2. Device according to Claim 1, characterised in that the spring (12) is supported on a support wall (25) which is arranged in the axial direction between the front tensioning rail (3) and the rear tensioning rail (4).
  3. Device according to Claim 1 and 2, characterised in that the pressure bar (9) is actuatable by means of an adjusting spindle (20) rotatable and arranged between the front tensioning rail (3) and the rear tensioning rail (4), on which a spindle nut (23) is displaceable which is connected via a bridge (24) firmly with the pressure bar (9), wherein the adjusting spindle (20) with ball shaped end faces on both sides against uneven pressure pieces (29, 30) which can be changed over is supported against axially parallel support walls (25) (Figure 5).
EP90120083A 1989-11-02 1990-10-19 Device for the parallel tensioning of printing plates Expired - Lifetime EP0425935B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90120083T ATE101360T1 (en) 1989-11-02 1990-10-19 DEVICE FOR PARALLEL CLAMPING OF PRINTING PLATES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3936459 1989-11-02
DE3936459A DE3936459C1 (en) 1989-11-02 1989-11-02

Publications (3)

Publication Number Publication Date
EP0425935A2 EP0425935A2 (en) 1991-05-08
EP0425935A3 EP0425935A3 (en) 1991-09-04
EP0425935B1 true EP0425935B1 (en) 1994-02-09

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EP90120083A Expired - Lifetime EP0425935B1 (en) 1989-11-02 1990-10-19 Device for the parallel tensioning of printing plates

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US (1) US5076167A (en)
EP (1) EP0425935B1 (en)
JP (1) JPH0749220B2 (en)
AT (1) ATE101360T1 (en)
DE (2) DE3936459C1 (en)

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DE3933678A1 (en) * 1989-10-09 1991-04-18 Miller Johannisberg Druckmasch DEVICE FOR ACCURATELY POSITIONING A PRINT PLATE ON A PRINT CYLINDER
DE4034494C1 (en) * 1990-10-30 1992-03-05 Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De
DE4111636C1 (en) * 1991-04-10 1992-07-30 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
EP0593780B1 (en) * 1992-04-13 1996-10-16 Toyo Ink Manufacturing Co., Ltd. Image transfer apparatus
DE4214167A1 (en) * 1992-04-30 1993-11-04 Roland Man Druckmasch DEVICE FOR RESTRICTING PRINTING PLATES ON THE PLATE CYLINDER OF PRINTING MACHINES, IN PARTICULAR BOW OFFSET PRINTING MACHINES
DE4219870C2 (en) * 1992-06-17 2002-07-18 Heidelberger Druckmasch Ag Automatic plate change procedure
US5347928A (en) * 1992-10-29 1994-09-20 Sakurai Graphic Systems Corporation Plate clamping unit for offset press
DE4244279C2 (en) * 1992-12-28 1995-05-18 Heidelberger Druckmasch Ag Printing form correction device to compensate for printing medium strains

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Publication number Priority date Publication date Assignee Title
FR1471777A (en) * 1966-03-18 1967-03-03 Schnellpressenfab Heidelberg Quick clamping device on printing machine cylinders
DE2501511C2 (en) * 1975-01-16 1983-06-01 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Device for attaching a flexible printing plate to the plate cylinder of a rotary printing press
JPS5967055A (en) * 1982-10-09 1984-04-16 Komori Printing Mach Co Ltd Plate backup device for sheet-fed rotary press
DE3516682A1 (en) * 1985-05-09 1986-11-13 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach DEVICE FOR PARALLELLY TENSIONING PRINTING PLATES ON THE PLATE CYLINDER OF PRINTING MACHINES
DE3606351A1 (en) * 1986-02-27 1987-09-03 Heidelberger Druckmasch Ag DEVICE FOR CLAMPING FLEXIBLE PRINTING PLATES ON THE PLATE CYLINDER OF ROTARY PRINTING MACHINES
DE3866063D1 (en) * 1987-08-25 1991-12-12 Heidelberger Druckmasch Ag DEVICE FOR CLAMPING FLEXIBLE PRINTING PLATES ON THE PLATE CYLINDER OF ROTARY PRINTING MACHINES.
DE3731684A1 (en) * 1987-09-21 1989-04-06 Koenig & Bauer Ag CLAMPING DEVICE
DE3936458C1 (en) * 1989-11-02 1991-04-11 Man Roland Druckmaschinen Ag, 6050 Offenbach, De

Also Published As

Publication number Publication date
DE59004549D1 (en) 1994-03-24
EP0425935A2 (en) 1991-05-08
JPH0749220B2 (en) 1995-05-31
DE3936459C1 (en) 1991-04-18
EP0425935A3 (en) 1991-09-04
ATE101360T1 (en) 1994-02-15
US5076167A (en) 1991-12-31
JPH03159744A (en) 1991-07-09

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