EP0132864B1 - Dispositif de fixation et d'ajustage d'une plaque d'impression sur un cylindre porte-plaques - Google Patents

Dispositif de fixation et d'ajustage d'une plaque d'impression sur un cylindre porte-plaques Download PDF

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Publication number
EP0132864B1
EP0132864B1 EP84200911A EP84200911A EP0132864B1 EP 0132864 B1 EP0132864 B1 EP 0132864B1 EP 84200911 A EP84200911 A EP 84200911A EP 84200911 A EP84200911 A EP 84200911A EP 0132864 B1 EP0132864 B1 EP 0132864B1
Authority
EP
European Patent Office
Prior art keywords
plate
clamping device
cylinder
groove
tightening
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
Application number
EP84200911A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0132864A1 (fr
Inventor
Antonio Bonomi
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.)
KBA Notasys SA
Original Assignee
De la Rue Giori 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 De la Rue Giori SA filed Critical De la Rue Giori SA
Priority to AT84200911T priority Critical patent/ATE31672T1/de
Publication of EP0132864A1 publication Critical patent/EP0132864A1/fr
Application granted granted Critical
Publication of EP0132864B1 publication Critical patent/EP0132864B1/fr
Expired 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
    • B41F27/1218—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 present invention relates to a device for fixing and adjusting a printing plate on a plate cylinder of a rotary printing machine, the plate cylinder being provided on its lateral surface with at least one axial groove inside which is housed a pair of clamps intended for fixing two ends, parallel to the axis of the cylinder, of a printing plate arranged on the lateral surface of the cylinder, at least one said grippers being movable inside the groove at least in the peripheral direction of the plate cylinder, hydraulic means ensuring said displacement in the peripheral direction of at least one of the grippers comprising at least two hydraulic cylinders housed in their respective housing of the clamp body open towards the adjacent radial wall of the groove so that the pistons of said cylinders, arranged at least approximately perpendicular to said adjacent radial wall, can come press and counter-clamp the clamp towards the center line of the groove.
  • the adjustment takes place in principle in two stages by moving by means of a screw one of the clamps in the axial direction of the cylinder and by stretching the plate in the peripheral direction of the cylinder by means of screws resting on the radial wall of the groove, adjacent to the clamp making it possible to move the clamp away from this radial wall and thus to tension the plate.
  • the patent US-A-2271 160 has proposed a device for fixing and adjusting a printing plate on a cylinder by a device similar to that of patent GB-A-2101 043 but in addition it locks the position of the clamp, after adjusting the plate, by screws screwed to the surface of the cylinder through oblong holes.
  • the present invention aims to remedy these drawbacks and provides a device for fixing and adjusting a printing plate on a plate cylinder using for adjustment the advantages offered by the hydraulic device while allowing to avoid when cylinder operation the disadvantages of a leak in the hydraulic circuit.
  • the device for fixing and adjusting a plate according to the invention is defined by the characterizing clause of claim 1, the state of the art being illustrated by DE-A-1 939 358.
  • the advantages of the device according to the invention essentially consist, as mentioned above, in the use of the known hydraulic device for tensioning a printing plate, thus ensuring the uniformity of the tension force exerted over the entire width of the plate both in terms of size and time, the tension being applied simultaneously along the end of the plate clamped between the jaws of the clamp and to the fact that after having taken advantage of the advantages offered by the hydraulic positioning its disadvantages are eliminated by locking the clamp in its final position and by eliminating the pressure in the hydraulic circuit.
  • Figure 1 is a partial schematic plan view of a plate cylinder showing the axial groove and the clamps and adjustment.
  • Figure 2 is a radial section along the line II-II in Figure 1.
  • the following description relates to a plate cylinder intended to support a single printing plate and therefore provided with a single axial groove.
  • the plate cylinder 1 is provided inside the groove 2 with two clamps 3 and 4 for fixing the two ends of a printing plate 5.
  • the clamp 4 which is provided with hydraulic means for its movement in the peripheral direction inside the groove 2.
  • the two clamps 3 and 4 are mounted displaceable in the peripheral direction inside the groove in a known manner not the subject of the present invention.
  • the clamp 3 can be provided with a device allowing its axial displacement.
  • An axial adjustment of the plate can also be obtained by the axial displacement of the plate cylinder.
  • the clamp 3 is provided with five transverse threads in which engage five bolts 6 which come to bear against the radial wall 7 of the groove 2, adjacent to the clamp 3.
  • the clamp 3 consists of a body 3a provided with means allowing its movement on the bottom of the groove 2 and its upper face constitutes the lower jaw of the clamp 3 while a second removable jaw 11 is fixed thereto by screws 12 ensuring tightening.
  • the body 3a is provided on its upper face with two pins 33 for hanging the end of the printing plate which is provided for this purpose with two corresponding holes.
  • the clamp 3 can be a completely fixed element if we consider the possibility that the printing plate is positioned on the cylinder with the image absolutely in axis.
  • the plate hooked by the pins 33 (which are at least two in number) will, as regards the clamp 3, be positioned correctly relative to the cylinder.
  • the clamp 4 includes, like the clamp 3, a body 4a surmounted by a removable jaw 13 fixed and tightened by screws 14.
  • the body 4a of the clamp 4 is provided with five transverse cylindrical passages inside which are housed five hydraulic cylinders 15.
  • Each cylinder 15 consists of a cylinder 16 fixed inside a cylindrical housing of the body 4a, of a piston 17 moving in leaktight manner inside the cylinder 16, its end projecting from to the lateral face of the clamp 4 and coming to bear against an abutment surface 18 of the radial face 19 of the groove 2, adjacent to the clamp 4.
  • the head of the piston of the same diameter as the inside diameter of the cylinder 16 is provided with three grooves 20 inside which are housed seals 10 ensuring the seal between the piston head 17 and the cylinder 16.
  • the hydraulic cylinders 15 are supplied by a pipe 21 which is itself supplied by a pump, the pressure control and ant provided by a pressure gauge to avoid exceeding the resistance to deformation of the printing plate 5. The pump and the pressure gauge are not shown.
  • Line 21 is provided with five T-shaped connections 22 for the supply of each of the cylinders 16.
  • the branch 22a of each T-shaped connection perpendicular to the line 21 has a frustoconical shape and is screwed into a body 23 itself fixed by two screws 24 on the body 4a of the clamp 4, facing the cylinder 16.
  • the branch 22a opens into a blind hole 23a in the body 23 facing and extending the cylinder 16.
  • a sealing gasket 25 ensures the seal between the body 23 and the clamp body 4a.
  • Near the center line of the groove 2 is fixed by screws 26 and facing each of the T-shaped connections 22 a deformation clamping element 27.
  • the clamping element 27 is provided on its upper part with a mortise 28 facing a projection 29 of the body 23.
  • the projection 29 is a cubic block welded to the body 23 and provided with an oblong bore 32.
  • a screw 30 passes through the upper wall of the mortise and is screwed into the lower part of the clamping body 27.
  • a return spring 31 pushing the clamp 4 against the radial wall 19 of the groove 2.
  • the hydraulic circuit supply pump which can be a small hand pump, is actuated until the authorized pressure is displayed on the pressure gauge.
  • the increase in hydraulic pressure is transmitted simultaneously to all the cylinders 16, passing through the line 21 and the T connections 22, and pushes the pistons 17 against the abutment face 18.
  • the clamp 4 moves inside the groove 2 and the printing plate 5 is stretched over the cylinder; when the hydraulic pressure reaches its maximum authorized value, the screws 30 which tighten the upper part 27a of the body 27 and tighten the projection 29 are tightened. From this moment, the clamp 4 is mechanically locked in this position and it suffices to eliminate the hydraulic pressure which is no longer useful, by means for example of a bypass, and thereafter to isolate the pump from the hydraulic circuit by closing for example a valve connecting them.
  • the cylinder is intended to support several plates, for example three, it is provided on its lateral surface with three axial grooves, each being provided with two clamps.
  • One of the clamps is used to fix one end of a printing plate, the second end of which will be fixed by one of the clamps of the next groove and so on.
  • the method and the device described above can also be used in the case for fixing and adjusting each of the plates.

Landscapes

  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
EP84200911A 1983-07-26 1984-06-25 Dispositif de fixation et d'ajustage d'une plaque d'impression sur un cylindre porte-plaques Expired EP0132864B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84200911T ATE31672T1 (de) 1983-07-26 1984-06-25 Vorrichtung zum aufspannen und ausrichten einer druckplatte auf einen plattenzylinder.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4082/83A CH653616A5 (fr) 1983-07-26 1983-07-26 Procede de fixation et d'ajustage d'une plaque d'impression sur un cylindre porte-plaques et dispositif de mise en oeuvre.
CH4082/83 1983-07-26

Publications (2)

Publication Number Publication Date
EP0132864A1 EP0132864A1 (fr) 1985-02-13
EP0132864B1 true EP0132864B1 (fr) 1988-01-07

Family

ID=4269484

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84200911A Expired EP0132864B1 (fr) 1983-07-26 1984-06-25 Dispositif de fixation et d'ajustage d'une plaque d'impression sur un cylindre porte-plaques

Country Status (12)

Country Link
US (1) US4596188A (ja)
EP (1) EP0132864B1 (ja)
JP (1) JPS6042045A (ja)
AT (1) ATE31672T1 (ja)
AU (1) AU568387B2 (ja)
CA (1) CA1227372A (ja)
CH (1) CH653616A5 (ja)
DD (1) DD216421A5 (ja)
DE (1) DE3468366D1 (ja)
IN (1) IN162455B (ja)
NL (1) NL8500165A (ja)
SU (1) SU1269736A3 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3510440A1 (de) * 1985-03-22 1986-09-25 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Vorrichtung zum einspannen und ausrichten von biegsamen druckplatten auf dem plattenzylinder von rotationsdruckmaschinen
DE3731039A1 (de) * 1987-09-16 1989-03-30 Koenig & Bauer Ag Einrichtung zum klemmen biegsamer druckplatten auf dem plattenzylinder einer rotationsdruckmaschine

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4641577A (en) * 1985-04-12 1987-02-10 Sweeny Peter K Apparatus for adjusting the plate segment of an off-set lithographic printer
DE3516682A1 (de) * 1985-05-09 1986-11-13 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zum parallelen spannen von druckplatten auf dem plattenzylinder von druckmaschinen
JPS6223754A (ja) * 1985-07-25 1987-01-31 Dainippon Ink & Chem Inc 印刷機の版位置矯正装置
DE3529599A1 (de) * 1985-08-19 1987-02-26 Roland Man Druckmasch Bogengreifereinrichtung fuer bogenrotationsdruckmaschinen
DE3532003A1 (de) * 1985-09-07 1987-03-19 Roland Man Druckmasch Spannvorrichtung zum wahlweisen befestigen eines gummituches oder einer druckplatte
DE3604071A1 (de) * 1986-02-08 1987-08-13 Koenig & Bauer Ag Druckplattenspanneinrichtung in einer grube eines plattenzylinders einer rotationsdruckmaschine
DE3606351A1 (de) * 1986-02-27 1987-09-03 Heidelberger Druckmasch Ag Vorrichtung zum aufspannen von biegsamen druckplatten auf dem plattenzylinder von rotationsdruckmaschinen
DE3616425A1 (de) * 1986-05-15 1987-11-19 Basf Ag Vorrichtung zum spannen von druckplatten
DE3626243A1 (de) * 1986-08-02 1988-02-04 Koenig & Bauer Ag Druckplattenbefestigungs- und spannvorrichtung
DE3866063D1 (de) * 1987-08-25 1991-12-12 Heidelberger Druckmasch Ag Vorrichtung zum aufspannen von biegsamen druckplatten auf dem plattenzylinder von rotationsdruckmaschinen.
DE3806526A1 (de) * 1988-03-01 1989-09-14 Heidelberger Druckmasch Ag Vorrichtung zum spannen von biegsamen druckplatten am plattenzylinder von rotationsdruckmaschinen
JPH0698746B2 (ja) * 1989-03-30 1994-12-07 アキヤマ印刷機製造株式会社 枚葉印刷機の版締め装置
DE3933678A1 (de) * 1989-10-09 1991-04-18 Miller Johannisberg Druckmasch Vorrichtung zum positionsgenauen spannen einer druckplatte auf einem druckzylinder
DE3934334C1 (ja) * 1989-10-14 1991-04-11 Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De
DE3936446A1 (de) * 1989-11-02 1991-05-08 Miller Johannisberg Druckmasch Plattenzylinder einer druckmaschine
DE4210897C1 (ja) * 1992-04-02 1993-08-12 Man Roland Druckmaschinen Ag, 6050 Offenbach, De
US5335046A (en) * 1993-02-22 1994-08-02 Intergraph Corporation Clamping mechanism for use on a rotatable plotter drum
DE4306139C2 (de) * 1993-02-27 1996-10-10 Heidelberger Druckmasch Ag Vorrichtung zur Durchführung von Arbeitsschritten in einem Zylinder einer Druckmaschine
US5937760A (en) * 1996-03-19 1999-08-17 Mitsubishi Paper Mills, Limited Method and device for mounting a lithoplate using register pins

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1996581A (en) * 1931-07-25 1935-04-02 Irving Trust Co Printing plate clamping mechanism
US2022681A (en) * 1932-05-24 1935-12-03 Irving Trust Co Printing plate clamping mechanism
US2271160A (en) * 1939-05-19 1942-01-27 Hoe & Co R Plate clamping mechanism for printing machines
US3119331A (en) * 1961-08-10 1964-01-28 Roland Offsetmaschf Clamping device for clamping printing plates of printing machines
DE1939358B2 (de) * 1968-08-01 1971-08-19 Vorrichtung zum befestigen von blattfoermigen teilen auf einem zylinder insbesondere von biegsamen druckformen auf dem formzylinder von rotationsdruckmaschinen
US3884147A (en) * 1972-05-26 1975-05-20 Roland Offsetmaschf Device for fastening flexible printing plates
US3858512A (en) * 1973-03-22 1975-01-07 Roland Offsetmaschf Lock-up mechanism for flexible printing plates providing improved reference adjustment
US4006686A (en) * 1975-09-18 1977-02-08 Ackerman Stephen P Blanket fastening means for a cylinder blanket
DE2702393A1 (de) * 1977-01-21 1978-08-03 Europa Carton Ag Verfahren und vorrichtung zum justieren von druckplatten
SE403353B (sv) * 1977-02-28 1978-08-14 Daetwyler & Co M Med bojliga tryckplattor forsedd och i sin lengdriktning delad formcylinder for rotationsdjuptryckmaskiner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3510440A1 (de) * 1985-03-22 1986-09-25 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Vorrichtung zum einspannen und ausrichten von biegsamen druckplatten auf dem plattenzylinder von rotationsdruckmaschinen
DE3731039A1 (de) * 1987-09-16 1989-03-30 Koenig & Bauer Ag Einrichtung zum klemmen biegsamer druckplatten auf dem plattenzylinder einer rotationsdruckmaschine

Also Published As

Publication number Publication date
JPS6042045A (ja) 1985-03-06
AU3099684A (en) 1985-01-31
DE3468366D1 (en) 1988-02-11
DD216421A5 (de) 1984-12-12
AU568387B2 (en) 1987-12-24
ATE31672T1 (de) 1988-01-15
JPH0153637B2 (ja) 1989-11-15
CA1227372A (en) 1987-09-29
SU1269736A3 (ru) 1986-11-07
NL8500165A (nl) 1986-08-18
US4596188A (en) 1986-06-24
IN162455B (ja) 1988-05-28
CH653616A5 (fr) 1986-01-15
EP0132864A1 (fr) 1985-02-13

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