EP0455068A1 - Verfahren zum Montieren und Befestigen einer Druckplatte auf einem Plattenzylinder in einer Offsetmaschine - Google Patents

Verfahren zum Montieren und Befestigen einer Druckplatte auf einem Plattenzylinder in einer Offsetmaschine Download PDF

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Publication number
EP0455068A1
EP0455068A1 EP91106313A EP91106313A EP0455068A1 EP 0455068 A1 EP0455068 A1 EP 0455068A1 EP 91106313 A EP91106313 A EP 91106313A EP 91106313 A EP91106313 A EP 91106313A EP 0455068 A1 EP0455068 A1 EP 0455068A1
Authority
EP
European Patent Office
Prior art keywords
plate
cylinder
groove
thermal
curved
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.)
Withdrawn
Application number
EP91106313A
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English (en)
French (fr)
Inventor
Edouard Borel
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.)
Bobst Mex SA
Original Assignee
Bobst SA
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 Bobst SA filed Critical Bobst SA
Publication of EP0455068A1 publication Critical patent/EP0455068A1/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • 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
    • B41F27/1262—Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49544—Roller making
    • Y10T29/49547—Assembling preformed components
    • Y10T29/49549—Work contacting surface element assembled to core
    • Y10T29/49552—Work contacting surface element assembled to core with prestressing of component by heat differential, e.g., shrink, fit

Definitions

  • the invention relates to the mounting and fixing of the plate on the plate cylinder of an offset printing machine.
  • the plate is in the form of a thin metal plate, for example aluminum, on which the print motif is engraved.
  • This engraved plate called a cliché or plate, is fixed to the periphery of a rotary cylinder called a plate holder.
  • such a cylinder generally has on its periphery a groove or groove of a certain radial depth and extending in the direction of the axis of the cylinder.
  • the printing plate which may extend over the entire periphery of the cylinder or over only a part, has at each of its ends (the plate being seen in the direction of its winding around the cylinder) a curved part intended to come engaged with the groove of the cylinder.
  • a method of attachment is described, for example, in patent US-A-4,214,530 in which each curved part has a shape such that it can fit or cling securely to an edge formed by the intersection of a corresponding radial wall of the groove with the peripheral surface of the cylinder.
  • Another commonly used fixing method also consists in using a printing plate oversized with respect to the peripheral dimension of the cylinder and in connecting at least one of its ends to a cam locking system which makes it possible to tension the plate in the direction cylinder rotation.
  • a cam locking system which makes it possible to tension the plate in the direction cylinder rotation. Examples of this form of construction are described in US-A-3,626,848 and 3,757,691.
  • the integration of this cam lock, inside a groove of the cylinder as described above requires a difficult and expensive construction, as well as a width of groove, also called dead zone, significant.
  • FIG. 1 the representation of the plate cylinder Pp is simplified in the sense that only the cylindrical envelope is shown on the periphery of which will be wound, in the direction of rotation of the cylinder during printing, a printing plate P. It is understood that in reality the cylindrical envelope of the cylinder Pp is mounted on a central shaft (not shown) driven in rotation at one end. On the periphery of the cylinder Pp is produced, in a known manner, a groove 10 intended for fixing each end 2, 3 of the plate P.
  • the groove 10, of rectangular section is produced essentially perpendicular to the peripheral surface of the cylinder Pp , that is to say radially, its width being a little wider than two thicknesses of plate.
  • a first end of the plate P has a part 2 curved along a fold line 20 and of length slightly less than the radial depth of the groove 10.
  • the first curved end 2 forms an angle greater than 90 ° with the annex surface of the plate P, thereby ensuring temporary attachment during winding.
  • the second end of the plate P also has a part 3 bent at 90 ° along a fold line 30; however, this second curved portion 3 is advantageously extended by a short portion 3a curved in the same direction and by approximately 10 ° relative to the portion 3.
  • the cumulative length of the curved portion 3 and of the portion 3a is also slightly less at the radial depth of the groove 10.
  • the mounting of the plate P on the cylinder Pp is partly similar to that generally used which consists in engaging - or hanging - each curved end 2, 3 with the corresponding radial wall 11, 12 of the groove 10.
  • the present mounting and fixing method differs in that the distance which, along the plate P, separates the two fold lines 20, 30 is less than the length which, along the periphery of the cylinder Pp , separates each of the two edges by which the two radial walls 11, 12 of the groove 10 terminate at the periphery of the cylinder Pp. Also, when the first end 2 has been engaged with the corresponding wall 11 and the other end 3a has been brought, by winding the plate P around the cylinder Pp, close to, but slightly set back from the other wall 12, from the groove 10, the whole of the plate P is subjected to thermal elongation caused by waves 4 emitted by a device 40 concentric with the cylinder Pp.
  • the thermal wave device 40 can be of the infrared type.
  • FIG. 2 shows that, while the plate P is subjected to thermal elongation, its first end 2 is held in place, using pliers 7, inside the groove 10, while the other end 3 is held by at least one wire 6 which makes it possible to apply forces ⁇ F, so as to keep it in contact with the peripheral surface of the cylinder Pp until it comes up to the level of the groove 10, abut against the first end 2, as shown in FIG. 2.
  • the portion 3a is exactly in the extension of the groove 10, it suffices to press, using a pusher 8, on top of the second end 3 to make the latter penetrate inside the groove 10. Then, during the subsequent cooling of the plate P, the latter remains taut, which ensures that it is held securely and firmly on cylinder Pp.
  • L 2e + small clearance, so as to minimize the width of the dead zone, while allowing easy installation of the two ends 2, 3 in the groove 10
  • the width L of the groove 10 has thus been reduced to 0.85 mm for a depth of 6 mm. Note that the strands 2 and 3, 3a are flattened upon introduction, which creates a useful lock.
  • the plate P while it is in place on the cylinder Pp, has a length (considered in the direction of rotation of the cylinder as mentioned above) greater than when it is in the free state, that is to say before it is mounted on the cylinder Pp; this elongation of the plate P therefore causes a deformation of the printing pattern initially engraved on the plate.
  • this deformation cannot be neglected, recent developments in the production of photographs using digital image processing, easily allow to predict and perform a pre-deformation of the pattern to compensate for the deformation of thermal elongation.
  • the method according to claim 1 also allows the dismantling of the plate, without damaging it, again by heating, then the application of a non-drawn heat-resistant suction cup bar, making it possible to extract the end 2 of the plate.
  • a non-drawn heat-resistant suction cup bar making it possible to extract the end 2 of the plate.
  • FIG. 4 shows an unwound plate P, the lines 56 representing a blank width B o and the punched calibrations 54 representing a useful width B ', slightly greater than the maximum width B''.
  • Notches, slots and orifices 51 to 54 are punched simultaneously.
  • the notches 54 allow lateral pre-centering at the stage shown in FIG. 2, after which a first slot located on the end 3 and not yet engaged, allows precise centering on a pin 60 (FIG. 3) inserted in the center of the groove 10 .
  • the holes 51, 52, and possibly a second slot 53 opposite the first 53, will be used for film-plate centering during the exposure.
  • the direction of advance is defined by arrow 57.
  • the fold lines are indicated by 20, 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
EP91106313A 1990-04-25 1991-04-19 Verfahren zum Montieren und Befestigen einer Druckplatte auf einem Plattenzylinder in einer Offsetmaschine Withdrawn EP0455068A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1404/90 1990-04-25
CH1404/90A CH682382A5 (fr) 1990-04-25 1990-04-25 Procédé de montage et de fixation d'une plaque d'impression sur le cylindre porte-plaque d'une machine d'impression.

Publications (1)

Publication Number Publication Date
EP0455068A1 true EP0455068A1 (de) 1991-11-06

Family

ID=4209645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91106313A Withdrawn EP0455068A1 (de) 1990-04-25 1991-04-19 Verfahren zum Montieren und Befestigen einer Druckplatte auf einem Plattenzylinder in einer Offsetmaschine

Country Status (5)

Country Link
US (1) US5224423A (de)
EP (1) EP0455068A1 (de)
JP (1) JPH04226359A (de)
CA (1) CA2039885C (de)
CH (1) CH682382A5 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0616257A2 (de) * 1993-03-18 1994-09-21 Toyo Ink Manufacturing Co., Ltd. Verfahren und Material zur Bild-Übertragung
US5573888A (en) * 1993-03-18 1996-11-12 Toyo Ink Manufacturing Co., Ltd. Image transfer method
EP1256449A1 (de) * 2001-05-07 2002-11-13 Heidelberger Druckmaschinen Aktiengesellschaft Druckwerk mit einem Plattenzylinder und mit einer Einfügeleiste

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4130359C2 (de) * 1991-09-12 1997-04-17 Heidelberger Druckmasch Ag Vorrichtung zum Ab- und/oder Zuführen von Druckplatten einer Druckmaschine
DE10219073A1 (de) * 2001-05-23 2002-11-28 Heidelberger Druckmasch Ag Verfahren und Vorrichtung zum Befestigen einer Druckplatte auf einem Plattenzylinder einer Rotationsdruckmaschine
US6868608B2 (en) * 2003-08-18 2005-03-22 Presstek, Inc. Plate handling with thermal tensioning
DE102006050908A1 (de) * 2006-10-28 2008-05-15 Man Roland Druckmaschinen Ag Druckplatte sowie Gummituchplatte für eine Druckmaschine
JP4925470B2 (ja) * 2008-07-01 2012-04-25 雅幸 井爪 印刷機用版製造装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE319378C (de) * 1915-02-12 1920-03-04 Maschf Augsburg Nuernberg Ag Verfahren und Vorrichtung zum Aufspannen von Formblechen fuer Tiefdruck auf Formzylinder
DE1960635A1 (de) * 1969-12-03 1971-06-24 Linotype Machinery Ltd Plattenzylinder einer Rotationsdruckmaschine
US4304182A (en) * 1980-09-12 1981-12-08 Pathfinder Graphic Associates, Inc. No-lock printing plate assembly using flexible plates
EP0246977A1 (de) * 1986-05-22 1987-11-25 Usinage Montage Et Assistance Technique U.M.A.T. Auf einem Trägerzylinder in einer Rotationsdruckmaschine befestigte flexible Druckplatte

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Publication number Priority date Publication date Assignee Title
US2664821A (en) * 1951-03-13 1954-01-05 Hamilton Tool Co Method of and means for varying the circumference of printing cylinders
US2990000A (en) * 1957-03-18 1961-06-27 Knight Newspapers Inc Printing plate bending and mounting machine
US3626848A (en) * 1969-06-09 1971-12-14 American Rockwell Corp Lockup for thin plates
US3757691A (en) * 1972-06-12 1973-09-11 North American Rockwell Printing cylinder
US3921526A (en) * 1974-02-14 1975-11-25 Ball Corp Stranded torsion bar for maintaining a printing plate on a printing cylinder
JPS5163708A (de) * 1974-09-26 1976-06-02 Emu Ei Batsukuree Engureibingu
US4191106A (en) * 1975-12-01 1980-03-04 K and Manufacturing Company, Inc. Printing plate clamping assembly
US4214530A (en) * 1978-02-23 1980-07-29 Glanzner Gary C Metal printing plate
JPS563198A (en) * 1979-06-21 1981-01-13 Yoshihiro Yamada Cutter of strip material having repeating indication part
JPS5718256A (en) * 1980-07-09 1982-01-30 Dainippon Printing Co Ltd Method of attaching or detaching sleeve plate for gravure printing
JPS57107842A (en) * 1980-12-26 1982-07-05 Dainippon Printing Co Ltd Attaching method of sleeve plate to printing roll in gravure printing
JPS6073850A (ja) * 1983-09-26 1985-04-26 Tokyo Kikai Seisakusho:Kk 輪転機における刷版自動着脱装置
DE3437309A1 (de) * 1984-10-11 1986-04-17 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Einrichtung zur befestigung eines gummituches an einem gummituchzylinder
JPS63145031A (ja) * 1986-12-10 1988-06-17 Tokyo Kikai Seisakusho Ltd 印刷版、版胴及び版胴への印刷版着装方法
JP2643178B2 (ja) * 1987-09-18 1997-08-20 ソニー株式会社 映像信号記録装置
CA1271623A (en) * 1988-01-28 1990-07-17 Yvon Tasse Method of securing plastic roll to metal core roller

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE319378C (de) * 1915-02-12 1920-03-04 Maschf Augsburg Nuernberg Ag Verfahren und Vorrichtung zum Aufspannen von Formblechen fuer Tiefdruck auf Formzylinder
DE1960635A1 (de) * 1969-12-03 1971-06-24 Linotype Machinery Ltd Plattenzylinder einer Rotationsdruckmaschine
US4304182A (en) * 1980-09-12 1981-12-08 Pathfinder Graphic Associates, Inc. No-lock printing plate assembly using flexible plates
EP0246977A1 (de) * 1986-05-22 1987-11-25 Usinage Montage Et Assistance Technique U.M.A.T. Auf einem Trägerzylinder in einer Rotationsdruckmaschine befestigte flexible Druckplatte

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 6, no. 201 (M-163)13 Octobre 1982 & JP-A-57 107 842 (DAINIPPON PRINTING CO LTD ) 5 Juillet 1982 *
PATENT ABSTRACTS OF JAPAN vol. 6, no. 80 (M-129)19 Mai 1982 & JP-A-57 018 256 (DAINIPPON PRINTING CO LTD ) 30 Janvier 1982 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0616257A2 (de) * 1993-03-18 1994-09-21 Toyo Ink Manufacturing Co., Ltd. Verfahren und Material zur Bild-Übertragung
EP0616257A3 (de) * 1993-03-18 1995-04-26 Toyo Ink Mfg Co Verfahren und Material zur Bild-Übertragung.
US5573888A (en) * 1993-03-18 1996-11-12 Toyo Ink Manufacturing Co., Ltd. Image transfer method
EP1256449A1 (de) * 2001-05-07 2002-11-13 Heidelberger Druckmaschinen Aktiengesellschaft Druckwerk mit einem Plattenzylinder und mit einer Einfügeleiste
US6595135B2 (en) 2001-05-07 2003-07-22 Heidelberger Druckmaschinen Ag Printing unit with automatically moveable tail tucker bar

Also Published As

Publication number Publication date
US5224423A (en) 1993-07-06
CA2039885A1 (en) 1991-10-26
JPH04226359A (ja) 1992-08-17
CA2039885C (en) 1994-10-11
CH682382A5 (fr) 1993-09-15

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