EP0585625B1 - Dispositif de fixation de plaques d'impression flexibles - Google Patents

Dispositif de fixation de plaques d'impression flexibles Download PDF

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Publication number
EP0585625B1
EP0585625B1 EP93112331A EP93112331A EP0585625B1 EP 0585625 B1 EP0585625 B1 EP 0585625B1 EP 93112331 A EP93112331 A EP 93112331A EP 93112331 A EP93112331 A EP 93112331A EP 0585625 B1 EP0585625 B1 EP 0585625B1
Authority
EP
European Patent Office
Prior art keywords
slot
printing plate
forme cylinder
curve
side surfaces
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
EP93112331A
Other languages
German (de)
English (en)
Other versions
EP0585625A1 (fr
Inventor
Ingo Köbler
Klaus T. Reichel
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
Publication of EP0585625A1 publication Critical patent/EP0585625A1/fr
Application granted granted Critical
Publication of EP0585625B1 publication Critical patent/EP0585625B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41F27/1262—Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means
    • B41F27/1268—Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means by self-locking or snap-on means

Definitions

  • the invention relates to a device for fastening a flexible printing plate on the forme cylinder of a printing press with slots running in the axial direction with parallel side surfaces.
  • US 43 04 182 shows a plate tension in which the folds of the pressure plate are inserted into a slot running in the axial direction of the forme cylinder.
  • the bevels are angled and are elastically pretensioned between the side surfaces of the slot or between one side surface and the second pressure plate fold resting on the other side surface.
  • the clamping force is used to frictionally secure the plate bends against slipping out.
  • the modulus of elasticity is not sufficient to provide the spring forces required for reliably securing the plate.
  • US 19 49 132 also shows a plate tension in which the plate bends are inserted into a slot running in the longitudinal direction of the forme cylinder.
  • a bar with spring tongues against the side wall of the clamping slot which is intended to secure the first bend of the pressure plate that is initially pressed into the clamping slot during the further clamping process.
  • This clamping device is unsuitable for automatic plate loading.
  • Another device for attaching a flexible pressure plate is described in US-A-42 14 530.
  • the invention has for its object to provide a plate tension that reliably clamps the printing plate with simple means and is suitable for an automatic plate change.
  • the slot or slots of the forme cylinder and those located therein are inexpensive and easy to manufacture. Thanks to the slim design of the spring, the slots can be made very narrow, so that the slot-related loss of pressure area can be kept low.
  • the spring which can be made of steel, installs the spring force required for its secure fit in the cylinder slot, the surface of the slot not requiring any special roughness requirements. Furthermore, the extended legs provide the necessary, metered clamping force for the reliable clamping of the pressure plate bends, whereby the re-tensioning of the trailing bends is made possible.
  • the printing form also protects the spring and the slot from dirt and aggressive media by covering them.
  • the device enables an automatic plate change, for example by means of a robot.
  • the forme cylinder 1 shown in FIG. 1 has an axially extending slot 2 with parallel side surfaces 3, 4.
  • springs 5 are inserted into the slot 2 right into the base.
  • Each spring has two inserted in it Prestressed, U-shaped legs 6, 7 resting on the side surfaces 3, 4 of the slot 2.
  • One leg 6 is extended, contains a pit 8 and ends with a curve 9.
  • the springs 5 are advantageously made of stainless steel, which reduces the risk of them rusting in the slot 2.
  • the forme cylinder 1 is advantageously provided with a galvanic coating which, for technological reasons, extends into the entrance area of the slot 2 and thus reduces the channel width lost for the pressure.
  • the galvanic coating extending into the slot 2 is a form-fitting protection of the springs 5 against slipping out.
  • the trailing bend 13 of the pressure plate 11 advantageously has a plurality of preferably dome-shaped knobs 14 which cooperate with the curves 9 of the springs 5 (FIG. 4) and generate a radial tensile force component on the trailing bend 13 of the pressure plate 11 and thus improve the plate tension.
  • the forme cylinder 15 has two axially extending slots 16, 17 with parallel side surfaces 18, 19 and 20, 21, respectively.
  • a plurality of springs 22, 23 are inserted into the bottom of each slot 16, 17.
  • the springs 22, 23 are similar to the spring shown in FIG. 3. They each have two U-shaped legs 24, 27 that are prestressed in the inserted state and bear against the side surfaces 18 to 21 of the slots 16, 17.
  • Each leg 24, 26 is extended and contains a pit 28, 29, which ends with a curve 30, 31.
  • the pressure plate 32 to be assembled is first pressed into the slot 17 of the forme cylinder 15 with its leading fold. It comes between the side surface 20 and the elongated leg 26 to lie and is stretched by the latter. Then the pressure plate 32 is wound around the forme cylinder 15 and the trailing edge 34 is pressed into the slot 16.
  • the spring 22 advantageously has a guide tongue 35 which reliably guides the fold 34 between the side surface 18 and the leg 24. The latter then tensions the trailing edge 34 due to its pretension.
  • the winding of the pressure plate around the forme cylinder and the pressing of its trailing edge can, as in the previous exemplary embodiment, advantageously take place when the forme cylinder is rotated with the transfer cylinder or another roller on the forme cylinder. For the sake of simplicity, further configurations, which may be analogous to the previous exemplary embodiment, will not be discussed.
  • the forme cylinder has a slot or a pair of slots for tensioning a printing plate. Also belonging to the scope of protection of the patent, several slots or pairs of slots for tensioning a corresponding number of printing plates can be arranged uniformly distributed on the circumference of the forme cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Claims (6)

  1. Dispositif de fixation d'une plaque d'impression flexible sur le cylindre porte-plaque d'une presse d'imprimerie pourvu d'au moins une fente à faces latérales parallèles se développant suivant le sens axial, caractérisé en ce que, dans la fente (2), sont enfoncés plusieurs ressorts en forme de lame (5), répartis sur la longueur de celle-ci, en ce que chaque ressort (5) comporte deux branches adjacentes aux faces latérales (3, 4) de la fente (2), en forme de U, précontraintes dans l'état enfoncé dans le fond de rainure, une branche (6) étant allongée, comprenant un creux (8) et se terminant par une courbure (9), et en ce que les bords rabattus (12, 13) de la plaque d'impression (11) sont admis entre la branche allongée (6) et la face latérale voisine (3).
  2. Dispositif de fixation d'une plaque d'impression flexible sur le cylindre porte-plaque d'une presse d'imprimerie pourvu de fentes à surfaces latérales parallèles se développant suivant le sens axial, caractérisé en ce que pour chaque bord rabattu (34, 33) de la plaque d'impression (32) est prévue une fente (16, 17), en ce que plusieurs ressorts (22, 23) en forme de lame, répartis sur la longueur de ladite fente, sont insérés, en ce que chaque ressort (22, 23) comporte deux branches (24 à 27) adjacentes aux faces latérales (18 à 21) de la fente (16, 17), en forme de U et précontraintes dans l'état enfoncé dans le fond de rainure, une branche (24, 26) étant allongée, et comprenant un creux (28, 29) qui se termine par une courbure (30, 31), et en ce qu'un bord rabattu (34, 33) de la plaque d'impression (32) est respectivement admis entre la branche allongée (24, 26) et la face latérale voisine (18, 20).
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que les ressorts (5, 22, 23) sont en acier inoxydable.
  4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le bord rabattu suivant (13, 34) de la plaque d'impression (11, 32) comporte plusieurs proéminences (14) coopérant avec la courbure (9, 30) des ressorts (5, 22).
  5. Dispositif selon la revendication 1 ou 2, caractérisé en ce qu'une couche galvanique (10) s'étend de la surface d'enveloppe du cylindre porte-plaque (1, 15) jusque dans la zone d'entrée de la fente respectivement des fentes (2, 16, 17).
  6. Dispositif selon l'une quelconque des revendications 2 à 5, caractérisé en ce qu'une languette de guidage (35) suit la courbure (30) du ressort (22).
EP93112331A 1992-08-06 1993-08-02 Dispositif de fixation de plaques d'impression flexibles Expired - Lifetime EP0585625B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4225949 1992-08-06
DE4225949A DE4225949C2 (de) 1992-08-06 1992-08-06 Vorrichtung zum Befestigen einer biegsamen Druckplatte

Publications (2)

Publication Number Publication Date
EP0585625A1 EP0585625A1 (fr) 1994-03-09
EP0585625B1 true EP0585625B1 (fr) 1996-07-03

Family

ID=6464935

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93112331A Expired - Lifetime EP0585625B1 (fr) 1992-08-06 1993-08-02 Dispositif de fixation de plaques d'impression flexibles

Country Status (4)

Country Link
US (1) US5375520A (fr)
EP (1) EP0585625B1 (fr)
JP (1) JPH06155715A (fr)
DE (2) DE4225949C2 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2709091B1 (fr) * 1993-08-20 1995-11-10 Heidelberg Harris Sa Dispositif à lame interchangeable pour maintenir une plaque d'impression sur un cylindre porte-plaque dans une imprimante rotative, et outil de démontage de la lame.
DE4335140C1 (de) * 1993-10-15 1995-02-02 Roland Man Druckmasch Vorrichtung zum Befestigen einer biegsamen Druckplatte
EP0710556B1 (fr) * 1994-11-05 1998-12-30 Koenig & Bauer Aktiengesellschaft Procédé et dispositif pour monter une plaque flexible
FR2727350B1 (fr) 1994-11-24 1997-02-14 Heidelberg Harris Sa Dispositif de fixation d'une forme d'impression souple
FR2737149B1 (fr) * 1995-07-25 1997-10-17 Heidelberg Harris Sa Dispositif de fixation d'une plaque d'impression sur un cylindre porte-plaque
JP2952752B2 (ja) * 1995-11-17 1999-09-27 株式会社東京機械製作所 刷版の版胴への固定および版胴からの解離装置
DE19758453C2 (de) * 1996-01-19 2002-09-19 Roland Man Druckmasch Vorrichtung zum Befestigen einer Bespannung auf einem Druckwerkzylinder
JP2981453B2 (ja) * 1997-10-21 1999-11-22 株式会社平河工業社 オフセット印刷機用刷版係止具及びそれを取り付けるためのアングル
US5915303A (en) * 1998-02-17 1999-06-29 Goss Graphic Systems, Inc. Spring clip plate retainer
DE19815935A1 (de) * 1998-04-09 1999-10-14 Roland Man Druckmasch Druckzylinder
DE20221647U1 (de) 2001-10-05 2006-09-28 Koenig & Bauer Ag Rollenrotationsdruckmaschine
DE102004019404B4 (de) * 2004-04-19 2013-05-23 Leberecht Fischer Kg Fellinstrument in Form eines Tamburins
DE102004062598A1 (de) * 2004-12-24 2006-07-06 Man Roland Druckmaschinen Ag Vorrichtung für einen Druckzylinder, insbesondere Offsetdruckzylinder für Rollen-Rotationsdruckmaschinen
DE102006032263B3 (de) * 2006-07-12 2008-01-31 Maschinenfabrik Wifag Klemmvorrichtung mit überlappenden Klemmmitteln
DE102006032264A1 (de) * 2006-07-12 2008-01-17 Maschinenfabrik Wifag Klemmvorrichtung mit kippbarem Klemmstück
DE102006032265A1 (de) * 2006-07-12 2008-01-17 Maschinenfabrik Wifag Druckzylinder mit schmalem Klemmschlitz, Verfahren zur Herstellung des Klemmschlitzes und Klemm- und Registervorrichtung zum Klemmen und Registern von Druckbelägen auf einem Druckzylinder
FR2905082B1 (fr) * 2006-08-22 2010-01-22 Goss Int Montataire Sa Plaque d'impression et ensemble d'impression correspondant.
JP2008096923A (ja) * 2006-10-16 2008-04-24 Fuji Xerox Co Ltd 画像形成装置及びプロセスカートリッジ
JP6297479B2 (ja) * 2014-12-05 2018-03-20 株式会社ミヤコシ 刷版の固定装置

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1949132A (en) * 1931-10-13 1934-02-27 Smith Walter Harold Printing press
GB910712A (en) * 1959-08-27 1962-11-14 Ernest Arthur Timson Improvements relating to printing cylinders
US3387559A (en) * 1967-08-04 1968-06-11 Hoe & Co R Holding means for laminated relief printing plate
US3757691A (en) * 1972-06-12 1973-09-11 North American Rockwell Printing cylinder
US4191106A (en) * 1975-12-01 1980-03-04 K and Manufacturing Company, Inc. Printing plate clamping assembly
DE2744371C3 (de) * 1977-10-01 1980-04-10 Albert-Frankenthal Ag, 6710 Frankenthal Vorrichtung zum Befestigen und Spannen von biegsamen Druckplatten
US4214530A (en) * 1978-02-23 1980-07-29 Glanzner Gary C Metal printing plate
DE3018249C2 (de) * 1980-05-13 1982-09-09 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum Befestigen von biegsamen Druckplatten auf dem Plattenzylinder von Rotationsdruckmaschinen
US4304182A (en) * 1980-09-12 1981-12-08 Pathfinder Graphic Associates, Inc. No-lock printing plate assembly using flexible plates
DD226251A1 (de) * 1984-07-31 1985-08-21 Polygraph Leipzig Vorrichtung zum befestigen einer biegsamen druckplatte
US4659446A (en) * 1985-05-15 1987-04-21 Hallmark Cards, Inc. Apparatus for electroplating printing cylinders
DD290625A5 (de) * 1989-12-22 1991-06-06 Veb Kombinat Polygraph "Werner Lamberz",De Vorrichtung zum befestigen einer biegsamen druckplatte
DD290627A5 (de) * 1989-12-22 1991-06-06 Veb Kombinat Polygraph "Werner Lamberz",De Vorrichtung zum befestigen einer biegsamen druckplatte
JP3030582B2 (ja) * 1991-09-19 2000-04-10 株式会社小森コーポレーション 輪転印刷機の刷版交換装置

Also Published As

Publication number Publication date
DE59303120D1 (de) 1996-08-08
DE4225949C2 (de) 1994-10-13
JPH06155715A (ja) 1994-06-03
US5375520A (en) 1994-12-27
EP0585625A1 (fr) 1994-03-09
DE4225949A1 (de) 1994-02-10

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