EP0069835A1 - Tensioning device for tensioning printing forms upon the plate cylinder of a printing machine - Google Patents

Tensioning device for tensioning printing forms upon the plate cylinder of a printing machine Download PDF

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Publication number
EP0069835A1
EP0069835A1 EP82103754A EP82103754A EP0069835A1 EP 0069835 A1 EP0069835 A1 EP 0069835A1 EP 82103754 A EP82103754 A EP 82103754A EP 82103754 A EP82103754 A EP 82103754A EP 0069835 A1 EP0069835 A1 EP 0069835A1
Authority
EP
European Patent Office
Prior art keywords
tensioning
rail
plate
clamping
cylinder
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.)
Granted
Application number
EP82103754A
Other languages
German (de)
French (fr)
Other versions
EP0069835B1 (en
Inventor
Bert Cappel
Kurt Difflipp
Helmut Emrich
Horst Erbach
Wolfgang Feldt
Klaus Neberle
Heinrich Ochs
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Priority to AT82103754T priority Critical patent/ATE10720T1/en
Publication of EP0069835A1 publication Critical patent/EP0069835A1/en
Application granted granted Critical
Publication of EP0069835B1 publication Critical patent/EP0069835B1/en
Expired legal-status Critical Current

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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

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  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rotary Presses (AREA)

Abstract

A clamping device for thin flexible printing plates has a tensioning rail at the trailing wall of a wide longitudinal groove in the plate cylinder. The tensioning unit is mounted for axial and peripheral adjustment on a support of "L" cross-section having a first leg seated with respect to the bottom of the groove and a second leg presenting an upstanding reference surface interposed between the tensioning rail and the trailing wall of the groove. A set of tensioning springs recessed in the tensioning rail bear against the reference surface and apply peripheral tension to the plate. A spring detent latches the tensioning rail temporarily against the reference surface, overcoming the tensioning springs while the trailing edge of the plate is being gripped. The spring detent is mounted upon and movable with the support. Screws having a plurality of selectable holes anchor the support in a series of peripheral positions for accommodation of plates of different length. A plurality of jack screws threaded into the tensioning rail have tips which bear against the reference surface on the support for removing slack from the plate and for tensioning of the plate about the surface of the cylinder.

Description

Die Erfindung betrifft eine Vorrichtung entsprechend dem Oberbegriff des ersten Patentanspruchs.The invention relates to a device according to the preamble of the first claim.

Vorrichtungen zum Spannen von Druckplatten auf dem Zylinder einer Druckmaschine sind bereits aus verschiedenen Veröffentlichungen bekannt geworden. Diese Spannvorrichtungen sind größtenteils als Spannschienen ausgebildet, die zum Befestigen der Druckplatte mit Klemmitteln zum Klemmen der Druckplatte und mit Spannmitteln z.B. Schrauben versehen sind. Diese ragen durch die Spannschienen hindurch, stützen sich gegen eine Wandfläche eines Zylinderkanals ab, in dem die Spannvorrichtung angeordnet ist, und müssen vom Bedienungspersonal betätigt werden. Diese Spannvorrichtungen ermöglichen dann, eine Druckplatte bestimmter Länge auf dem Plattenzylinder in Umfangsrichtung zu spannen und ggf. in Umfangsrichtung zu justieren z.B. dann, wenn die Druckplatte zum Zylinder schief steht. Dadurch, daß die Spannschienen im Zylinderkanal paarweise angeordnet sind, ist es sehr zeitraubend, die Druckplatte exakt auf dem Plattenzylinder registergenau zu befestigen.Devices for clamping printing plates on the cylinder of a printing press have already become known from various publications. These tensioning devices are largely designed as tensioning rails which, for fastening the pressure plate with clamping means for clamping the pressure plate and with tensioning means, e.g. Screws are provided. These protrude through the tensioning rails, are supported against a wall surface of a cylinder channel in which the tensioning device is arranged, and must be operated by the operating personnel. These clamping devices then make it possible to clamp a printing plate of a certain length on the plate cylinder in the circumferential direction and, if necessary, to adjust it in the circumferential direction, e.g. when the pressure plate is crooked to the cylinder. Because the clamping rails are arranged in pairs in the cylinder channel, it is very time-consuming to fix the printing plate exactly on the plate cylinder in register.

Um ein exaktes und schnelles Aufspannen einer Druckplatte zu ermöglichen, ist bereits eine Vorrichtung (DE-PS 2 200 187) bekannt geworden, bei der eine in die Spannschiene eingeklemmte Druckplatte durch einen Hebelmechanismus schnellspannbar ist. Dabei ist die Spannschiene auf einem Spannwinkel befestigt und mittels Spannschrauben auf dem Spannwinkel verschiebbar. Durch den Hebelmechanismus, der an dem Spannwinkel angreift, kann die in den Spannschienen geklemmte Druckplatte durch Verschieben des Spannwinkels gespannt werden. Eine in diesem Hebelgestänge angeordnete Feder soll dann auch während des Druckbetriebes dafür Sorge tragen, daß die Druckplatte optimal gespannt ist. Obwohl diese Vorrichtung einen Hebeltrieb zum Verschieben des Spannwinkels aufweist und auch ein vergrößerter Spannweg vorhanden ist, ist sie zum schnellen Spannen von Druckplatten im eigentlichen Sinn nicht geeignet, da das Spannen der Druckplatte nach wie vor durch die Spannschrauben in den Spannschienen erfolgt.In order to enable an exact and quick clamping of a pressure plate, a device (DE-PS 2 200 187) has already become known in which a pressure plate clamped in the tensioning rail can be quickly tensioned by a lever mechanism. The tensioning rail is attached to a tensioning bracket and can be moved on the tensioning bracket using tensioning screws. Due to the lever mechanism that engages the clamping bracket, the pressure plate clamped in the clamping rails can can be tensioned by moving the clamping angle. A spring arranged in this lever linkage should then also ensure during printing that the pressure plate is optimally tensioned. Although this device has a lever drive for shifting the clamping angle and there is also an enlarged clamping path, it is not really suitable for fast clamping of pressure plates, since the clamping of the pressure plate is still carried out by the clamping screws in the clamping rails.

Der Erfindung liegt deshalb die Aufgabe zugrunde, eine Vorrichtung zu schaffen, die ein schnelles und einfaches Spannen von Druckplatten ermöglicht. Weiterhin sollen mit dieser Vorrichtung auch Druckplatten mit unterschiedlichen Längen spannbar sein.The invention is therefore based on the object of providing a device which enables printing plates to be clamped quickly and easily. Furthermore, printing plates with different lengths should also be clampable with this device.

Gelöst wird diese Aufgabe durch eine Vorrichtung ent7 sprechend dem Kennzeichen des ersten Patentanspruchs.This object is achieved by a device according to the characterizing part of the first claim.

Der Vorteil dieser Vorrichtung besteht darin, daß das eigentliche Spannen der Druckplatte durch Federkraft erfolgt. Dabei befinden sich die Federn in den Spannschienen und stützen sich auf einer Winkelschiene ab. Diese Winkelschiene ermöglicht in einfacher Art den Spannbereich so zu erweitern, daß Druckplatten mit unterschiedlichen Längen spannbar sind.The advantage of this device is that the actual tensioning of the pressure plate is done by spring force. The springs are located in the tensioning rails and are supported on an angle rail. This angle rail enables the clamping range to be expanded in a simple manner so that printing plates with different lengths can be clamped.

An einem Ausführungsbeispiel ist die Erfindung nachfolgend näher beschrieben.

  • Fig. 1 zeigt einen Plattenzylinder mit einer im Zylinderkanal angeordneten Plattenspannvorrichtung im Schnitt;
  • Fig. 2 zeigt in einem Ausschnitt die Führung einer Plattenspannschiene;
  • Fig. 3 zeigt eine Draufsicht entsprechend Fig. 1;
  • Fig. 4 zeigt eine weitere Ausgestaltung der Erfindung.
The invention is described in more detail below using an exemplary embodiment.
  • Fig. 1 shows a plate cylinder with a plate clamping device arranged in the cylinder channel in section;
  • Fig. 2 shows in a section the guidance of a plate tensioning rail;
  • Fig. 3 shows a plan view corresponding to Fig. 1;
  • 4 shows a further embodiment of the invention.

Der Plattenzylinder 1 einer hier nicht näher zu erläuternden Offsetdruckmaschine weist in einem Zylinderkanal 2 Mittel zum Befestigen und Spannen von Druckplatten auf. Diese Befestigungsmittel sind als vordere Spannschine 3 und hintere Spannschiene 4 ausgebildet und sind jeweils am Druckanfang 5 und Druckende 6 des Zylinderkanals 2 angeordnet. Die am Druckende 6 angeordnete Spannschiene 4 ist auf einer Winkelschiene 7 vorgesehen, die im Zylinderkanal 2 in verschiedene Positionen bringbar ist. Die am Druckanfang 5 vorgesehene Spannschiene 3 ist in bekannter Weise im Zylinderkanal 2 angeordnet und wird mittels Spannschrauben 8 betätigt.The plate cylinder 1 of an offset printing machine (not to be explained in more detail here) has means in a cylinder channel 2 for fastening and tensioning printing plates. These fasteners are designed as a front clamping rail 3 and rear clamping rail 4 and are each arranged at the start of pressure 5 and end of pressure 6 of the cylinder channel 2. The tensioning rail 4 arranged at the printing end 6 is provided on an angle rail 7 which can be brought into different positions in the cylinder channel 2. The tensioning rail 3 provided at the start of pressure 5 is arranged in a known manner in the cylinder channel 2 and is actuated by means of tensioning screws 8.

Die hintere, auf der Winkelschiene 7 angeordnete Spannschiene 4 besitzt über ihre Länge gesehen eine definierte Anzahl von Stufenbohrungen 9, in denen Druckfedern 10 vorgesehen sind, welche sich an einem Schenkel 11 der Winkelschiene 7 abstützen und somit die Spannschiene 4 zur Zylinderkanalmitte hin bewegen. Die Winkelschine 7 ist im Zylinderkanal 2 mittels federnder Bolzen 12 in ihrer Lage fixiert. Diese Bolzen 12 greifen in Bohrungen 13 ein, die in einem parallelen Abstand zum Druckende 6 im Zylinderkanal 2 gebohrt sind. Durch eine Anzahl von mehreren hintereinander parallel zum Druckende vorgesehenen Bohrungen 13 kann die Winkelschiene 7 in verschiedene Postitionen zum Druckende 6 angeordnet werden.Seen from its length, the rear tensioning rail 4 arranged on the angle rail 7 has a defined number of stepped bores 9, in which compression springs 10 are provided, which are supported on one leg 11 of the angle rail 7 and thus move the tensioning rail 4 towards the center of the cylinder channel. The angle bracket 7 is fixed in position in the cylinder channel 2 by means of resilient bolts 12. These bolts 12 engage in bores 13 which are drilled at a parallel distance from the pressure end 6 in the cylinder channel 2. Through a number of several bores 13 provided one behind the other parallel to the printing end, the angle rail 7 can be arranged in different positions to the printing end 6.

Weiterhin weist die Winkelschiene 7 in einer Ausnehmung 14 eine Blattfeder 15 auf, die die Spannschiene 4, wenn sie an dem Schenkel 11 der Winkelschiene 7 anliegt absützt. Beide Spannschienen 3 und 4 werden durch Längsführungen 17, 18, die beidseits des Zylinderkanals 2 angeordnet sind, geführt.Furthermore, the angle rail 7 has a leaf spring 15 in a recess 14, which supports the tensioning rail 4 when it bears against the leg 11 of the angle rail 7. Both tensioning rails 3 and 4 are guided by longitudinal guides 17, 18, which are arranged on both sides of the cylinder channel 2.

Die Funktionsweise der Vorrichtung ist wie folgt: Die Druckplatte 19 wird in bekannter Weise in der Spannschiene 3 geklemmt und parallel zum Druckanfang 5 mit der Spannschiene 3 ausgerichtet. Das freie Ende der Druckplatte 19 wird dann in der hinteren Spannschiene 4 geklemmt. Dabei wird die Winkelschiene 7 in einer der Druckplattenlänge entsprechenden Bohrung 13 fixiert. Durch Herunterdrücken der Blattfeder 15 wird dann durch die Kraft der Druckfedern 10 die Spannschiene 4 von dem Schenkel 11 der Winkelschiene 7 weggedrückt und die Druckplatte 19 gespannt. Durch die von den Druckfedern 10 aufgebrachte Kraft ist gewährleistet, daß die Druckplatte 19 immer optimal gespannt ist.The operation of the device is as follows: the pressure plate 19 is clamped in a known manner in the tensioning rail 3 and aligned with the tensioning rail 3 parallel to the start of pressure 5. The free end of the pressure plate 19 is then clamped in the rear clamping rail 4. The angle rail 7 is fixed in a bore 13 corresponding to the pressure plate length. By pressing down the leaf spring 15, the tensioning rail 4 is then pushed away from the leg 11 of the angle rail 7 by the force of the compression springs 10 and the pressure plate 19 is tensioned. The force exerted by the compression springs 10 ensures that the pressure plate 19 is always optimally tensioned.

Bei einer weiteren Ausgestaltungsform der Erfindung (Fig. 4) sind in den Stufenbohrungen 9 zwischen Druckfedern 10 und dem Boden 20 der Stufenbohrung 9 Druckscheiben 21 vorgesehen, auf die Druckschrauben 22 wirken. Diese Art der Ausgestaltung ermöglicht beim Eindrehen der'Druckschrauben 22 eine Erhöhung der Spannkraft.In a further embodiment of the invention (FIG. 4), pressure washers 21 are provided in the stepped bores 9 between compression springs 10 and the bottom 20 of the stepped bore 9, on which pressure screws 22 act. This type of configuration enables the clamping force to be increased when the pressure screws 22 are screwed in.

Claims (8)

1.) Spannvorrichtung zum Spannen von Druckplatten auf dem Plattenzylinder einer Druckmaschine, wobei der Plattenzylinder einen Zylinderkanal aufweist, in dem verschiebbare Spannschienen angeordnet sind, von denen die die Plattenhinterkante erfassende Spannschiene auf einer verschiebbar angeordneten Winkelschiene angeordnet ist, dadurch gekennzeichnet , daß die Winkelschiene (7) in mehreren festgelegten Stellungen parallel zum Druckende (6) verstell- und arretierbar angeordnet ist, daß zur Erzeugung der Spannkraft in der Spannschiene (4) sich an einem Schenkel (11) der Winkelschiene (7) abstützende Druckfedern (10) vorgesehen sind, und daß die Spannschiene (4) bei Anlage am Schenkel (11) durch eine in einer Ausnehmung (14) der Winkelschiene (7) angeordnete Blattfeder (15) abstützbar und arretierbar ist.1.) Clamping device for clamping printing plates on the plate cylinder of a printing press, the plate cylinder having a cylinder channel in which displaceable clamping rails are arranged, of which the clamping rail which detects the plate rear edge is arranged on a displaceably arranged angle rail, characterized in that the angle rail ( 7) in several fixed positions parallel to the pressure end (6) is arranged such that it can be adjusted and locked in such a way that compression springs (10) are provided on one leg (11) of the angle rail (7) to generate the tensioning force in the tensioning rail (4), and that the tensioning rail (4) can be supported and locked when in contact with the leg (11) by a leaf spring (15) arranged in a recess (14) in the angle rail (7). 2.) Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß im Zylinderkanal (2) parallel zum Druckende (6) paarweise mehrere hintereinander angebrachte Bohrungen (13) vorgesehen sind, in die jeweils ein an der Winkelschine (7) beidseitig angeordneter Bolzen (12) einführbar ist.2.) Device according to claim 1,
characterized in that in the cylinder channel (2) parallel to the printing end (6) a plurality of bores (13) are provided in pairs, into each of which a pin (12) arranged on both sides of the angle bracket (7) can be inserted. 3.) Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß die Druckfedern (10) über auf Druckscheiben (21) wirkende Druckschrauben (22) verspannbar sind.3.) Device according to claim 1,
characterized in that the compression springs (10) can be tensioned by means of pressure screws (22) acting on pressure disks (21). 4.) Vorrichtung nach Anspruch 1 und 3,
dadurch gekennzeichnet, daß die Bolzen (12) in der Winkelschiene (7) federnd angeordnet sind.4.) Device according to claim 1 and 3,
characterized in that the bolts (12) are arranged resiliently in the angle rail (7). 5.) Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß die vordere Spannschiene (3) durch Blattfedern (23) an die Wand (24) des Zylinderkanals (2) drückbar ist.5.) Device according to claim 1,
characterized in that the front tensioning rail (3) can be pressed against the wall (24) of the cylinder channel (2) by leaf springs (23). 6.) Vorrichtung nach Anspruch 1 - 5,
dadurch gekennzeichnet, daß die Spannschienen (3 und 4) im Zylinderkanal (2) in Längsführungen (17, 18) geführt sind.6.) Device according to claim 1-5,
characterized in that the tensioning rails (3 and 4) in the cylinder channel (2) are guided in longitudinal guides (17, 18). 7.) Vorrichtung nach Anspruch 1-6, dadurch gekennzeichnet, daß die Spannschienen (3 u. 4) als bekannte Schnellspannschienen ausgeführt sind, die im Zylinderkanal7.) Device according to claims 1-6, characterized in that the clamping rails (3 and 4) are designed as known quick clamping rails, which are in the cylinder channel (2) axial verschieb- und einstellbar geführt sind.(2) are axially displaceable and adjustable.
EP82103754A 1981-07-13 1982-05-03 Tensioning device for tensioning printing forms upon the plate cylinder of a printing machine Expired EP0069835B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82103754T ATE10720T1 (en) 1981-07-13 1982-05-03 CLAMPING DEVICE FOR CLAMPING PRINTING PLATES ON THE PLATE CYLINDER OF A PRINTING PRESS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3127586A DE3127586C1 (en) 1981-07-13 1981-07-13 Clamping device for clamping printing plates on the plate cylinder of a printing machine
DE3127586 1981-07-13

Publications (2)

Publication Number Publication Date
EP0069835A1 true EP0069835A1 (en) 1983-01-19
EP0069835B1 EP0069835B1 (en) 1984-12-12

Family

ID=6136770

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82103754A Expired EP0069835B1 (en) 1981-07-13 1982-05-03 Tensioning device for tensioning printing forms upon the plate cylinder of a printing machine

Country Status (6)

Country Link
US (1) US4489653A (en)
EP (1) EP0069835B1 (en)
JP (1) JPS5859084A (en)
AT (1) ATE10720T1 (en)
BR (1) BR8204031A (en)
DE (2) DE3127586C1 (en)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
GB2196941A (en) * 1986-06-16 1988-05-11 Noritsu Kenkyu Center Co Device for feeding photosensitive material
FR2628680A1 (en) * 1988-03-01 1989-09-22 Heidelberger Druckmasch Ag DEVICE FOR TENDING FLEXIBLE PRINTING PLATES ON THE PLATE CARRIER OF ROTARY PRINTING MACHINES

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JPS6026847U (en) * 1983-07-29 1985-02-23 三菱重工業株式会社 Plate fixing device
DE3409479A1 (en) * 1984-03-15 1985-09-26 Heidelberger Druckmaschinen Ag, 6900 Heidelberg TENSIONING DEVICES FOR THE PRESSURE PLATES FOR THE OFFSET PRINTING MACHINES WITH HOLES IN THE FRONT AND REAR EDGES IN THE CURVING ORIENTATION
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
JP2606626B2 (en) * 1991-05-16 1997-05-07 東洋紡績株式会社 Developing device for photosensitive resin plate
US5685226A (en) * 1996-02-26 1997-11-11 Presstek, Inc. Adaptive clamping mechanism for printing plates
US6116160A (en) * 1998-03-13 2000-09-12 Iris Graphics, Inc. Printer drum
JP3524472B2 (en) * 2000-05-17 2004-05-10 リョービ株式会社 Sheet-fed printing press
CZ297967B6 (en) * 2000-08-25 2007-05-09 Heidelberger Druckmaschienen Ag Device for setting at least one register element in a printing machine and method of making the same
RU2561857C2 (en) * 2011-06-30 2015-09-10 Кениг Унд Бауэр Акциенгезельшафт Method of mounting and fixing printing form on plate cylinder of multicolour offset printing machine

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Publication number Priority date Publication date Assignee Title
DE2200187A1 (en) * 1971-01-28 1972-08-10 Polygraph Leipzig Device for precisely positioned quick clamping of flexible printing plates and cylinders
DE2114717A1 (en) * 1971-03-26 1972-09-28 Register System Gmbh Device for fastening and adjusting printing plates on printing cylinders
GB1346799A (en) * 1971-11-11 1974-02-13 Koenig & Bauer Ag Plate clamping device for intaglio printing presses
DE2213614B1 (en) * 1972-03-31 1973-03-22 Roland Offsetmaschf DEVICE FOR FASTENING PRINT PLATES
CH542720A (en) * 1972-04-21 1973-10-15 Heidelberger Druckmasch Ag Quick clamping device on rotary cylinders of printing machines
US3994224A (en) * 1975-06-09 1976-11-30 Newspaper Equipment Company Mounting structure for printing plates
DE2702393A1 (en) * 1977-01-21 1978-08-03 Europa Carton Ag Printing plate holder and registration unit cylinder - has precisely adjustable gripping rail holding plate edge clamping rail

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2196941A (en) * 1986-06-16 1988-05-11 Noritsu Kenkyu Center Co Device for feeding photosensitive material
GB2196941B (en) * 1986-06-16 1989-12-20 Noritsu Kenkyu Center Co Device for feeding photosensitive material
FR2628680A1 (en) * 1988-03-01 1989-09-22 Heidelberger Druckmasch Ag DEVICE FOR TENDING FLEXIBLE PRINTING PLATES ON THE PLATE CARRIER OF ROTARY PRINTING MACHINES

Also Published As

Publication number Publication date
JPH0242665B2 (en) 1990-09-25
ATE10720T1 (en) 1984-12-15
DE3127586C1 (en) 1982-12-09
BR8204031A (en) 1983-07-05
JPS5859084A (en) 1983-04-07
DE3261518D1 (en) 1985-01-24
EP0069835B1 (en) 1984-12-12
US4489653A (en) 1984-12-25

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