EP0330736B1 - Dispositif de verrouillage sans tension - Google Patents

Dispositif de verrouillage sans tension Download PDF

Info

Publication number
EP0330736B1
EP0330736B1 EP19880118939 EP88118939A EP0330736B1 EP 0330736 B1 EP0330736 B1 EP 0330736B1 EP 19880118939 EP19880118939 EP 19880118939 EP 88118939 A EP88118939 A EP 88118939A EP 0330736 B1 EP0330736 B1 EP 0330736B1
Authority
EP
European Patent Office
Prior art keywords
locking
lock
undercut
longitudinal slot
plate
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
EP19880118939
Other languages
German (de)
English (en)
Other versions
EP0330736B2 (fr
EP0330736A3 (en
EP0330736A2 (fr
Inventor
Alan Robert Wallschlaeger Sr.
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.)
Goss International LLC
Original Assignee
Goss Graphic Systems Inc
Rockwell International Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22582075&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0330736(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Goss Graphic Systems Inc, Rockwell International Corp filed Critical Goss Graphic Systems Inc
Publication of EP0330736A2 publication Critical patent/EP0330736A2/fr
Publication of EP0330736A3 publication Critical patent/EP0330736A3/en
Application granted granted Critical
Publication of EP0330736B1 publication Critical patent/EP0330736B1/fr
Publication of EP0330736B2 publication Critical patent/EP0330736B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 present invention relates to offset lithographic presses and more particularly to lock-up mechanisms for holding the thin, flexible litho plates to the surface of the plate roll.
  • the art of printing by offset lithography involves the use of thin, flexible plates which are basically planographic, that is without relief, and which are treated so that the surfaces have areas which attract or repel oil and water to create areas of image differentiation.
  • To mount the litho plates on the surface of the press plate rolls it is essential to insure that the plate conforms closely to the outer surface of the plate roll. Mounting is usually effected by forming a longitudinal slot in the plate roll and inserting thereinto one of a variety of biasing or clamping devices called lockups. Often the leading edge of the plate is bent back on itself so that the bent portion can fit over the edge formed in the roll by the longitudinal slot and then be held in position by some form of spring or clamp. Alternatively, mechanisms have been provided in which the plate leading edge has been rigidly clamped.
  • a plate lock-up mechanism which is somewhat related to that of US-A-3,757,691 is US-A-3,626,848 where a spring member is used to hold down the leading edge of plate 11 around the undercut side of the slot and cam 40 is used to urge the hook 35 against the trailing end 13. Examples of other plate lock up mechanisms may be found in US-A-3,608,847 and US-A-3,095,811.
  • EP-A-0 039 765 a lock-up mechanism as defined in the preamble of claim 1 is disclosed.
  • a clamping body having wedge-like disposed compression surfaces is pressed against two leaf spring arms, each of which is in contact with an undercut locking surface of the printing cylinder for clamping the ends of the flexible printing plate between one of the undercut locking surfaces and the respective leaf spring arm.
  • FR-A-1 352 571 another lock-up mechanism for holding a flexible printing plate to a printing cylinder is disclosed.
  • this known lock-up mechanism the ends of the flexible printing plate are introduced into the opening of a clamping bar disposed within the slot of the printing cylinder.
  • the opening of the clamping bar is defined by two surfaces inclined relative to each other.
  • a cylindrical clamping bar is disposed within the opening of the other clamping bar and supported by an elastic finger fixed to the printing cylinder.
  • the outer clamping bar having said opening for said cylindrical inner clamping bar is radially moveable relative to the inner clamping bar.
  • the ends of the printing plate are clamped between the inner cylindrical clamping bar and one of the two inclined surfaces, with this surface contacting the ends of the printing plate being a radially extending surface and the other surface inclined thereto serving as a runway for the cylindrical inner clamping bar.
  • An additional object of this invention is to provide a printing plate lock-up mechanism which the plate can be installed on the plate roll and removed therefrom without the necessity of having installation or removal equipment.
  • An additional object of this invention is to provide a plate lock-up mechanism in which the width of the plate gap is held to a minimum.
  • a further object of this invention is to provide an improved plate lock-up mechanism which can be adapted for use with plate rolls having longitudinal slots that were structured for use with previously existing plate lock-up mechanisms.
  • numeral 10 indicates a section through a portion of a plate roll upon which a plate 11 disposed.
  • the plate roll 10 is formed with longitudinal groove 12 in its outer surface 13, the longitudinal slot extending all the way across the width of the plate roll.
  • Longitudinal slot 12 is shown as being undercut to define a pair of opposed surfaces 15 which provide locking surfaces against which both the leading and the trailing ends of plate 11 can be abutted. From the slot inwardly, the substantially flat or planar clamping surfaces 15 terminate in a curved wall, the shape being of no particular significance, since the shape is largely dictated by the machining operation selected for forming the slot.
  • Fig. 1 it can be seen that the leading edge 20 of plate 11 has been folded back at an acute angle to the plate (and to the surface of the roll) so that it fits over the nose portion 21 of the roll 10.
  • the trailing edge 22 is not, unlike the leading edge, bent back on itself but rather extends over the opening of longitudinal slot 12 so that it is in abutment with the innermost surface of leading edge 20.
  • Each locking means has a curved outer surface 26 for contacting the ends of the flexible plate and clamping them against the locking surface 15.
  • the radius of curvature of each of the locking elements 25 is such that the contact between the curved outer surface with the substantially planar surface 15 is one of basically line contact, so that firm contact is made with the surface of the printing plate.
  • each of the locking elements 25 is substantially cylindrical in shape.
  • a spacer bar 30 is disposed within the slot.
  • This bar has a plurality of upwardly and outwardly extending mounting posts or spacing studs 31 each of which is surrounded by a compression spring 32.
  • the bottom part of each of the elements 25 contains a cylindrical bore 33 for reception of the upper end of a spring 32.
  • FIGs. 3 and 4 illustrate the manner in which this can be effected.
  • the slot 35 has been formed with only one undercut surface 36 while the other side wall of the slot is essentially vertical.
  • a spacer bar mechanism 38 that is secured into a small secondary recess by means of a bolt 39.
  • the use and positioning of such spacer bars is common in the art and does not form part of this invention.
  • the generally cylindrical locking element 40 corresponds to the locking element 25 of Fig. 1 and it is urged outwardly by means of compression springs 41.
  • Fig. 3 illustrates the manner in which this can be effected. Referring first to Fig. 3, it will be seen that the slot 35 has been formed with only one undercut surface 36 while the other side wall of the slot is essentially vertical.
  • a spacer bar mechanism 38 that is secured into a small secondary recess by means of a bolt 39.
  • the generally cylindrical locking element 40 corresponds to the locking element 25 of Fig. 1 and it is urged outwardly by means of compression spring
  • the bottom part of spring 41 is received into an appropriately formed recess 42 in the bottom of slot 33 while the upper end of spring 41 is received into a recess formed in the bottom part of a vertically movable spacer 43.
  • the spacer 43 is formed with a generally arcuately formed receptacle-like surface 44 into which the locking element 40 can be received. It should be pointed out that the spacing element 43 contains an integrally formed wall 45 on each end which acts to define the lateral limits of the arcuate surface 44 and prevent locking element 40 from moving laterally in the general direction of the length of longitudinal slot 33.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Clamps And Clips (AREA)
  • Printing Plates And Materials Therefor (AREA)

Claims (11)

1. Mécanisme de verrouillage pour maintenir une plaque d'impression flexible (11) sur un cylindre d'impression (10) présentant une fente longitudinale (12, 35) formée dans sa surface (13) pour définir au moins une surface de verrouillage contre-dépouillée (15, 36) contre laquelle les deux extrémités (20, 22) de ladite plaque d'impression flexible (11) sont serrées,
comportant:
des moyens de verrouillage (25, 40) pour serrer les extrémités (20, 22) de ladite plaque d'impression flexible (11) contre ladite surface de verrouillage contre-dépouillée (15, 36) et
des moyens de ressort précontraint (32, 41) agencés en compression opérative entre lesdits moyens de verrouillage (25, 40) et le fond de ladite fente longitudinale (12, 35) pour pousser lesdits moyens de verrouillage (25, 40) extérieurement contre ladite surface de verrouillage contre-dépouillée (15, 36),
caractérisé en ce que
lesdits moyens de verrouillage (25, 40) comprennent une surface externe courbe (26) pour contacter directement les extrémités (20, 22) de ladite plaque d'impression flexible (11) et les serrer contre ladite surface de verrouillage contre-dépouillée (15, 36).
2. Mécanisme de verrouillage tel que défini à la revendication 1, dans lequel lesdits moyens de verrouillage comprennent une pluralité d'éléments de verrouillage individuels (25, 40), espacés essentiellement de manière régulière le long de ladite fente longitudinale (12, 35).
3. Mécanisme de verrouillage tel que défini à la revendication 2, dans lequel lesdits moyens de verrouillage (25, 40) sont de forme essentiellement cylindrique.
4. Mécanisme de verrouillage tel que défini à la revendication 1, dans lequel ladite surface de verrouillage contre-dépouillée (15, 36) est essentiellement plane et le rayon de courbure de la surface externe (26) desdits moyens de verrouillage (25, 40) étant tel qu'il crée essentiellement une ligne de contact entre lesdits moyens de verrouillage (25, 40) et ladite surface de verrouillage (15, 36).
5. Mécanisme de verrouillage tel que défini à la revendication 2, dans lequel lesdits moyens d'espacement (30, 38, 43) sont disposés à l'intérieur de ladite fente longitudinale (12, 35) pour recevoir lesdits moyens de verrouillage (25, 40) et lesdits moyens de ressort précontraint (32, 41), de sorte que lesdits éléments de verrouillage (25, 40) sont maintenus dans une position prédéterminée le long de ladite fente longitudinale (12, 35).
6. Mécanisme de verrouillage tel que défini à la revendication 2, dans lequel lesdits moyens de ressort précontraint (41) sont disposés dans des ouvertures de montage (42) formées sur la longueur de ladite fente longitudinale (35).
7. Mécanisme de verrouillage tel que défini à la revendication 2, dans lequel lesdits moyens de ressort précontraint (32) sont montés sur des goupilles d'espacement (31) disposées le long de cette fente longitudinale (12).
8. Mécanisme de verrouillage tel que défini à la revendication 1, dans lequel ladite fente longitudinale (12) définit deux surfaces de verrouillage contredépouillées (15) et lesdits moyens de verrouillage (25) présentant une surface externe incurvée (26) pour contacter simultanément les deux surfaces de verrouillage contre- dépouillées (15).
9. Mécanisme de verrouillage tel que défini à la revendication 3, dans lequel lesdits moyens de verrouillage (25) sont réalisés avec une ouverture (33) pour recevoir une extrémité desdits moyens de ressort précontraint (32).
10. Mécanisme de verrouillage tel que défini à la revendication 1, comprenant une plaque d'impression (11) fixée audit cylindre d'impression (10) par l'extrémité initiale et l'extrémité terminale (20, 22) en contact l'une avec l'autre et serrées entre ladite surface de verrouillage contre-dépouillée (15, 36) et lesdits moyens de verrouillage (25, 40).
11. Mécanisme de verrouillage tel que défini à la revendication 1, dans lequel ladite fente longitudinale (35) définit deux surfaces contre-dépouillées (15) et des moyens de remplissage (52) sont montés à l'intérieur de ladite fente (35) et adjacents à l'une desdites surfaces contre-dépouillées (15) pour contacter lesdits moyens de verrouillage (40) et les isoler de l'une desdites surfaces contre-dépouillés (15).
EP19880118939 1988-02-29 1988-11-14 Dispositif de verrouillage sans tension Expired - Lifetime EP0330736B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16164088A 1988-02-29 1988-02-29
US161640 1988-02-29

Publications (4)

Publication Number Publication Date
EP0330736A2 EP0330736A2 (fr) 1989-09-06
EP0330736A3 EP0330736A3 (en) 1990-08-22
EP0330736B1 true EP0330736B1 (fr) 1993-10-13
EP0330736B2 EP0330736B2 (fr) 2000-01-19

Family

ID=22582075

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880118939 Expired - Lifetime EP0330736B2 (fr) 1988-02-29 1988-11-14 Dispositif de verrouillage sans tension

Country Status (4)

Country Link
EP (1) EP0330736B2 (fr)
JP (1) JPH07121581B2 (fr)
CA (1) CA1307421C (fr)
DE (2) DE3884939T3 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4005093C1 (en) * 1990-02-17 1991-06-20 Man Roland Druckmaschinen Ag, 6050 Offenbach, De Forme clamp for printing cylinder - has channel in cylinder with spindle to clamp form eccentrically
DE9004130U1 (de) * 1990-04-10 1990-06-13 MAN Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum Spannen von Platten auf einen Formzylinder einer Rotationsdruckmaschine
EP0492138B1 (fr) * 1990-12-21 1995-11-15 Heidelberger Druckmaschinen Aktiengesellschaft Dispositif de fixation rapide
DE4319167C2 (de) * 1993-06-09 1995-04-27 Roland Man Druckmasch Vorrichtung zum Befestigen einer biegsamen Druckplatte
DE4415622C2 (de) * 1994-05-04 1996-11-28 Roland Man Druckmasch Vorrichtung zum Befestigen einer biegsamen Druckplatte
DE4415621A1 (de) * 1994-05-04 1995-11-09 Roland Man Druckmasch Vorrichtung zum Befestigen einer biegsamen Druckplatte
DE29507523U1 (de) * 1995-05-05 1995-07-06 Albert-Frankenthal Ag, 67227 Frankenthal Vorrichtung zum Befestigen einer Gummitucheinheit auf einem Gummizylinder
JP2004090378A (ja) * 2002-08-30 2004-03-25 Seiken Graphics Kk 刷版
DE102006012760A1 (de) * 2006-03-17 2007-09-20 Man Roland Druckmaschinen Ag Vorrichtung zum Befestigen einer flexiblen Bespannung auf einen Druckzylinder

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1352571A (fr) * 1963-04-02 1964-02-14 Maschf Augsburg Nuernberg Ag Dispositif de fixation pour clichés flexibles ou blanchets
JPS5821586B2 (ja) * 1976-07-05 1983-05-02 三菱重工業株式会社 版締装置
JPS563167Y2 (fr) * 1977-01-31 1981-01-23
JPS5528503Y2 (fr) * 1977-01-31 1980-07-08
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

Also Published As

Publication number Publication date
DE3884939D1 (de) 1993-11-18
DE3884939T2 (de) 1994-02-03
JPH07121581B2 (ja) 1995-12-25
EP0330736B2 (fr) 2000-01-19
DE3884939T3 (de) 2000-12-28
DE330736T1 (de) 1990-02-08
EP0330736A3 (en) 1990-08-22
CA1307421C (fr) 1992-09-15
EP0330736A2 (fr) 1989-09-06
JPH01229631A (ja) 1989-09-13

Similar Documents

Publication Publication Date Title
US5010818A (en) Tensionless plate lock-up
EP0330736B1 (fr) Dispositif de verrouillage sans tension
US4191106A (en) Printing plate clamping assembly
US4402265A (en) Magnetic printing saddle
US3425348A (en) Clamping arrangement for blanket in printing press
US5016531A (en) Double truck printing registration system for a rotary printing press
US4214530A (en) Metal printing plate
US3416447A (en) Saddle for use with flexible wraparound printing plates
US4403549A (en) Printing plate attachment arrangement
US4304182A (en) No-lock printing plate assembly using flexible plates
US4628815A (en) Reversible lockup system for magnetically securable printing plates
US5644984A (en) Cylinder with plate clamping device
CA1309297C (fr) Plaque d'impression
CA1221873A (fr) Came d'arret et bascule de verrouillage
JP3350524B2 (ja) 横見当合わせ用の調節装置
US6732650B2 (en) Device for providing a cylinder with a packing and registers
EP0040921A1 (fr) Cylindre d'impression avec un dispositif de fixation auto-tendant
EP1071558B1 (fr) Dispositif servant a retenir une plaque au moyen d'une lame-ressort
US5584242A (en) Clamp assembly for lithographic plates
US5778787A (en) Cylinder having a two-legged slit for a rotary printing press
EP0767056B2 (fr) Dispositif pour fixer un cliché dans une machine à imprimer
RU2065524C1 (ru) Навесной замок с ключом
EP0520598A1 (fr) Plaque d'impression pour presse à imprimer ou similaire
GB2049875A (en) Improvement in or relating to leaf springs
US1800468A (en) Plate-clamping mechanism for printing presses

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): CH DE FR GB LI SE

EL Fr: translation of claims filed
DET De: translation of patent claims
PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): CH DE FR GB LI SE

17P Request for examination filed

Effective date: 19901211

17Q First examination report despatched

Effective date: 19920805

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB LI SE

REF Corresponds to:

Ref document number: 3884939

Country of ref document: DE

Date of ref document: 19931118

ET Fr: translation filed
PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: MAN ROLAND DRUCKMASCHINEN AG

Effective date: 19940709

EAL Se: european patent in force in sweden

Ref document number: 88118939.3

APAA Appeal reference recorded

Free format text: ORIGINAL CODE: EPIDOS REFN

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: GOSS GRAPHIC SYSTEMS, INC.

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: ROCKWELL INTERNATIONAL CORPORATION TRANSFER- GOSS

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

PLAW Interlocutory decision in opposition

Free format text: ORIGINAL CODE: EPIDOS IDOP

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

PUAH Patent maintained in amended form

Free format text: ORIGINAL CODE: 0009272

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT MAINTAINED AS AMENDED

27A Patent maintained in amended form

Effective date: 20000119

AK Designated contracting states

Kind code of ref document: B2

Designated state(s): CH DE FR GB LI SE

REG Reference to a national code

Ref country code: CH

Ref legal event code: AEN

Free format text: AUFRECHTERHALTUNG DES PATENTES IN GEAENDERTER FORM

ET3 Fr: translation filed ** decision concerning opposition
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20051109

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20051117

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20051125

Year of fee payment: 18

Ref country code: SE

Payment date: 20051125

Year of fee payment: 18

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20060102

Year of fee payment: 18

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061115

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061130

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20070601

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20061114

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20070731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061114

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061130

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO