EP0403433B1 - Vorrichtung zum Spannen von Druckplatten auf einem Zylinder einer Tiefdruckmaschine - Google Patents

Vorrichtung zum Spannen von Druckplatten auf einem Zylinder einer Tiefdruckmaschine Download PDF

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Publication number
EP0403433B1
EP0403433B1 EP90810417A EP90810417A EP0403433B1 EP 0403433 B1 EP0403433 B1 EP 0403433B1 EP 90810417 A EP90810417 A EP 90810417A EP 90810417 A EP90810417 A EP 90810417A EP 0403433 B1 EP0403433 B1 EP 0403433B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
screws
sectors
axially
annular sectors
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
EP90810417A
Other languages
English (en)
French (fr)
Other versions
EP0403433A1 (de
Inventor
Raffaele Fina
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
Publication of EP0403433A1 publication Critical patent/EP0403433A1/de
Application granted granted Critical
Publication of EP0403433B1 publication Critical patent/EP0403433B1/de
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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F1/00—Platen presses, i.e. presses in which printing is effected by at least one essentially-flat pressure-applying member co-operating with a flat type-bed
    • B41F1/26—Details
    • B41F1/28—Sheet-conveying, -aligning or -clamping devices

Definitions

  • the present invention relates to a device for tensioning the printing plates mounted on a cylinder formed by a ferrule or a plate cylinder of an intaglio printing machine.
  • plate cylinder In the field of printing, the term “plate cylinder” is understood to mean the assembly composed of the body of the cylinder which carries printing plates and of the shaft on which this body of the cylinder is integral, and under the term “ferrule” only the cylindrical tube or mantle without a shaft. Plate cylinders are generally used in sheet printing machines and must be installed as a unit in the machine bearings, respectively disassembled completely from the machine by removing the bearing shaft, while the ferrules , generally used in coil printing machines, can be simply mounted on the shaft, respectively removed from their shaft, the printing plates being mounted on the ferrule before it is mounted on the shaft.
  • this cylinder which carries the plates must meet certain very strict requirements which guarantee, on the one hand, the sharpness of the impression and, on the other hand, the perfect register between the different images.
  • the present invention provides a device complementary to the known devices making it possible to fix and also tension axially the intaglio printing plates on a plate cylinder or on a ferrule while avoiding possible deformation due to the reasons mentioned above.
  • the method according to the invention is characterized by the characteristic clause of claim 1.
  • the advantages of this device are the following: by fixing the lateral ends of the printing plates mounted on a cylinder, on annular sectors arranged on either side of the lateral sides of the cylinder, one ensures, on the one hand, a better resistance of the printing plates and on the other hand, an axial tension is applied to the plates precisely making it possible to counteract the aforementioned drawbacks, namely the deformations of the plates mounted by means applying peripheral tensions, these deformations being able to have during printing due to the high contact pressure.
  • elastic means can be provided between the annular sectors and the lateral sides of the cylinder, these elastic means applying thrust forces tending to move the annular sectors of the cylinder axially.
  • These elastic means which are in particular formed by coil springs serve to maintain the axial tension of the printing plates during the operation of the printing machine if there occurs, because of the deformations mentioned, a certain enlargement of the plates .
  • the device according to the invention can be used both for fixing intaglio plates on a ferrule, therefore, in general, for printing on the spool, and on a plate cylinder, therefore, in general, for printing. leaf.
  • Figure 1 is a side view of a ferrule provided with a device according to the invention.
  • Figure 2 is a partial view, in section along the line I-I of Figure 1 showing the end of this ferrule.
  • Figure 3 is an enlarged detailed view of a recess on the plate.
  • Figures 1 and 2 show a ferrule 1 plate holder on which are mounted three printing plates 2, 3, 4 held and tensioned in the peripheral direction so that the adjacent ends of each plate are edge to edge to form a continuous surface.
  • the fixing and tensioning of these plates in the peripheral direction is carried out by known or proposed means such as, for example, those described in the introduction.
  • the ferrule is provided on either side with three annular sectors 5, 6, 7, of the same diameter as it, and being in the extension of its lateral faces, a sector for each lateral edge of each plate 2, 3 , 4.
  • Each sector 5, 6, 7 is mounted axially on the shell by regularly distributed screws 16 which are screwed into axial recesses 17 blind and tapped in the side of the shell 1, while they freely cross sectors 5, 6 , 7 so that each sector 5, 6, 7 is axially movable relative to the ferrule 1.
  • the holding in the radial direction and the guiding of the sectors are ensured by guides 18, regularly distributed, formed by pins driven in axial blind passages 14 of the lateral face of the ferrule 1, their dimension allowing them to slide in holes provided in each sector 5, 6, 7.
  • screws 25 Arranged alternately with the screws 16 and the guides 18 are screws 25 for positioning and lateral tension of the plates. These screws 25 are screwed only on sectors 5, 6, 7 in passages axial threaded 26 thereof, and penetrate into blind and opposite housings 20 and 21 extending axially, on the one hand, in the shell 1 and on the other hand, in the sectors 5, 6, 7 facing the ferrule. These screws 25 abut against the bottom of the housings 20 and allow the axial positioning of the printing plates and the adjustment of the axial tension applied to them via said annular sectors. In these blind housings 20, 21 are housed coil springs 19 surrounding the screws 25 and pressing against the bottom of the housings 20 and 21.
  • the printing plates 2, 3, 4 on the annular sectors 5, 6, 7 have on their peripheral periphery tapped holes 8, drilled radially, the upper part 9 of which is conical and into which can be screwed screws 23 with countersunk heads.
  • the lateral ends of the printing plates 2, 3, 4 lying at the height of the sectors 5, 6, 7 have recesses 24 which take place in the conical parts 9 of the holes 8.
  • recess is meant a stamped shape in the plate serving as a housing for the head of the screws which thus do not protrude from the plate, as illustrated in FIG. 3.
  • the printing plates have undergone, because of the deformations mentioned, an enlargement such as under the force of the coil springs exerting a permanent tension on the plates the screws 25 no longer abut at the bottom of the housings 20, after stopping the machine, all the screws 25 are tightened to make up for the play.
  • a cylinder is provided with a single plate, under these conditions a closed annular sector is used, therefore a ring, for each lateral edge of the plate.
  • the device according to the invention applies as an additional means of tensioning for all the installations which allow fixing and tensioning of the plates in the peripheral direction, with the exception, of course, of the ferrules on which the plates are glued .
  • the invention is not limited to the embodiments described, but also covers the many possible variants.
  • the invention also applies to plate cylinders having cylinder sectors separated by ditches where individual plates are fixed and adjusted on the sectors of the cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Rotary Presses (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)

Claims (7)

  1. Vorrichtung zum Spannen von Druckplatten (2, 3, 4), die auf einem von einem Mantel (1) oder einem Plattenzylinder einer Stichtiefdruckmaschine gebildeten Zylinder montiert sind, dadurch gekennzeichnet, dass der Zylinder an beiden Seiten für jeden Seitenrand jeder Druckplatte mit einem ringförmigen Sektor (5, 6, 7) versehen ist, wobei im Falle einer einzigen Druckplatte der Sektor geschlossen ist und einen Ring bildet, dass diese Sektoren den gleichen Aussendurchmesser wie der Zylinder haben und mit Mitteln versehen sind, um daran die Seitenränder jeder Druckplatte (2, 3, 4) zu befestigen, dass diese ringförmigen Sektoren (5, 6, 7) an beiden Seiten des Zylinders axial verschiebbar mittels Schrauben (16) montiert sind, die axial in den Zylinder eingeschraubt sind und die ringförmigen Sektoren frei durchsetzen, um sie bei Abwesenheit einer Druckplatte axial zu halten, dass Mittel vorgesehen sind, um Spannkräfte auf die erwähnten ringförmigen Sektoren an beiden Seiten des Zylinders im entgegengesetzten axialen Sinne auszuüben, und dass in diese ringförmige Sektoren eingeschraubte Schrauben (25) vorgesehen sind, die gegen den Plattenzylinder stossen, um jede Druckplatte (2, 3, 4) axial zu positionnieren und die auf sie mit Hilfe der ringförmigen Sektoren ausgeübte axiale Spannkraft einzustellen.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die erwähnten ringförmigen Sektoren (5, 6, 7) axial durch axiale Führungsstifte (18) geführt sind.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass zwischen den erwähnten ringförmigen Sektoren (5, 6, 7) und den Seiten des Zylinders elastische Mittel vorgesehen sind, welche Druckkräfte ausüben, die die ringförmigen Sektoren (5, 6, 7) vom Zylinder axial zu entfernen suchen.
  4. Vorrichtung nach den Ansprüchen 2 un d 3, dadurch gekennzeichnet, dass die erwähnten Schrauben (16), welche axial in den Plattenzylinder (1) eingeschraubt sind und die ringförmigen Sektoren (5, 6, 7) frei durchsetzen, dazu bestimmt sind, die elastischen Mittel bei der Montage und bei der Demontage der Druckplatten zusammenzudrücken.
  5. Vorrichtung nach den Ansprüchen 3 oder 4, dadurch gekennzeichnet, dass die elastischen Mittel Schraubenfedern (19) sind.
  6. Vorrichtung nach den Ansprüchen 2 und 5, dadurch gekennzeichnet, dass die erwähnten Schraubenfedern (19) die erwähnten Schrauben (25), die in die ringförmigen Sektoren eingeschraubt sind, umgeben und in Oeffnungen (20) liegen, die im Zylinder (1) vorgesehen sind und in welche diese Schrauben (25) eingreifen.
  7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Mittel zum Befestigen des Seitenrandes jeder Druckplatte (2, 3, 4) an den ringförmigen Sektoren (5, 6, 7) aus Schrauben (23) bestehen, welche in Gewindeöffnungen (8) dieser ringförmigen Sektoren eingreifen und deren Köpfe in eingefalzten Senkungen (24) liegen, die in den erwähnten Druckplatten vorgesehen sind.
EP90810417A 1989-06-14 1990-06-08 Vorrichtung zum Spannen von Druckplatten auf einem Zylinder einer Tiefdruckmaschine Expired - Lifetime EP0403433B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2233/89 1989-06-14
CH223389 1989-06-14

Publications (2)

Publication Number Publication Date
EP0403433A1 EP0403433A1 (de) 1990-12-19
EP0403433B1 true EP0403433B1 (de) 1994-08-10

Family

ID=4228975

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90810417A Expired - Lifetime EP0403433B1 (de) 1989-06-14 1990-06-08 Vorrichtung zum Spannen von Druckplatten auf einem Zylinder einer Tiefdruckmaschine

Country Status (12)

Country Link
US (1) US5070785A (de)
EP (1) EP0403433B1 (de)
JP (1) JP2806601B2 (de)
KR (1) KR0169481B1 (de)
CN (1) CN1021311C (de)
AT (1) ATE109726T1 (de)
AU (1) AU629358B2 (de)
CA (1) CA2018572A1 (de)
DD (1) DD295124A5 (de)
DE (1) DE69011427T2 (de)
RU (1) RU1816269C (de)
UA (1) UA12867A (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4420971C1 (de) * 1994-06-16 1995-07-20 Roland Man Druckmasch Verfahren und Vorrichtung zum Aufziehen flexibler Druckformen
CN109130457B (zh) * 2018-11-01 2023-11-14 大连巨通塑料制品有限公司 凹版印刷机版辊密封装置
CN112406267B (zh) * 2020-11-23 2022-08-16 太仓仁飞模具有限公司 一种新型纺织印刷辊

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1860765A (en) * 1928-12-11 1932-05-31 Rembrandt Intaglio Printing Co Printing and other cylinder and means for securing sheets thereto
US2005885A (en) * 1932-01-23 1935-06-25 Westinghouse Electric & Mfg Co Roll
US2538499A (en) * 1946-04-30 1951-01-16 Henry F Benoit Cylinder coupling
US3016010A (en) * 1959-08-20 1962-01-09 Cottrell Company Printing press plate clamping means for prebent wrap around printing plates of soft material
US3141405A (en) * 1961-10-09 1964-07-21 Champlain Company Inc Clamp for flexible printing plate
US3237558A (en) * 1962-06-04 1966-03-01 Fas Clip Corp Printing blanket and fastener means therefor
CH397725A (de) * 1962-12-21 1965-08-31 Maerk Werner Vorrichtung für die auswechselbare Montage von Klischees auf Druckwalzen, insbesondere für Anilindruck
FR1389192A (fr) * 1964-03-13 1965-02-12 Stork & Co Nv Pochoir cylindrique pour machine à imprimer des films ou analogues
US3205814A (en) * 1964-09-24 1965-09-14 William F Huck Rotary cylinder construction of removable shell type
US3434415A (en) * 1965-09-03 1969-03-25 Hamada Printing Press Mechanism for mounting wrap-around plates on the impression cylinder
US3456588A (en) * 1967-03-22 1969-07-22 John C Motter Printing Press C Printing press plate cylinder lockup
JPS5832707B2 (ja) * 1977-06-10 1983-07-14 キヤノン株式会社 弾性ロ−ラ−
US4864704A (en) * 1988-04-06 1989-09-12 Day International Corporation Interlocking rubber-jacketed end cap and a rubber-covered roll

Also Published As

Publication number Publication date
CA2018572A1 (en) 1990-12-14
UA12867A (uk) 1997-02-28
US5070785A (en) 1991-12-10
AU629358B2 (en) 1992-10-01
DE69011427D1 (de) 1994-09-15
JP2806601B2 (ja) 1998-09-30
CN1049127A (zh) 1991-02-13
RU1816269C (ru) 1993-05-15
CN1021311C (zh) 1993-06-23
KR0169481B1 (ko) 1999-05-01
ATE109726T1 (de) 1994-08-15
DD295124A5 (de) 1991-10-24
KR910000361A (ko) 1991-01-29
DE69011427T2 (de) 1995-03-23
AU5709290A (en) 1990-12-20
EP0403433A1 (de) 1990-12-19
JPH0324960A (ja) 1991-02-01

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