EP0114446B1 - Einrichtung zum Befestigen von biegsamen Folien auf einem Zylinder einer Rotationsdruckmaschine - Google Patents

Einrichtung zum Befestigen von biegsamen Folien auf einem Zylinder einer Rotationsdruckmaschine Download PDF

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Publication number
EP0114446B1
EP0114446B1 EP83201871A EP83201871A EP0114446B1 EP 0114446 B1 EP0114446 B1 EP 0114446B1 EP 83201871 A EP83201871 A EP 83201871A EP 83201871 A EP83201871 A EP 83201871A EP 0114446 B1 EP0114446 B1 EP 0114446B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
blanket
slot
sheet
width
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
EP83201871A
Other languages
English (en)
French (fr)
Other versions
EP0114446A2 (de
EP0114446A3 (en
Inventor
Hartmut Karl Sauer
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 AT83201871T priority Critical patent/ATE20326T1/de
Publication of EP0114446A2 publication Critical patent/EP0114446A2/de
Publication of EP0114446A3 publication Critical patent/EP0114446A3/fr
Application granted granted Critical
Publication of EP0114446B1 publication Critical patent/EP0114446B1/de
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
    • B41F27/125—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 on a curvilinear path, e.g. by winding on a roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F30/00—Devices for attaching coverings or make-ready devices; Guiding devices for coverings
    • B41F30/04—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to transfer cylinders

Definitions

  • the present invention relates to a device for fixing one end of a sheet of flexible and folding-resistant material, such as a blanket, to a cylinder of a rotary printing machine, the cylinder being provided with a slot. radial insertion extending parallel to the axis of the cylinder, intended for fixing the folded end of the sheet.
  • Such a device is described in DE-PS.22.52.949.
  • the wall of the slot parallel to the axis is provided with a fixing device for one of the ends of the sheet.
  • the fixing device has a chamfered edge inserted into the body of the cylinder.
  • a border strip attached to the end of the sheet is slipped into this edge. To prevent it from falling outside, this strip must be protected by a safety device which complicates the fixing of the end of the sheet.
  • the present invention overcomes these drawbacks by providing a device for fixing and securing directly to the cylinder body in a simple manner the end of a flexible sheet and resistant to folding.
  • the fixing device is characterized in that the radial slot in its inner part forms a housing whose cross section widens towards the axis of the cylinder and whose inner bottom has, in the peripheral direction, a width greater than the width of the folded part of the end of the sheet, that one of the walls of the radial slot is provided with a receiving groove parallel to the axis of the cylinder forming an acute angle with the part of said wall extending outwards and that the maximum width of the external part of the radial slot extending beyond the receiving groove is less than the width of the folded part of the end of the sheet .
  • the advantages of this device are above all linked to its simplicity which makes it possible to ensure the fixing of one end of a flexible sheet and resistant to folding, for example a blanket, on the body of a cylinder without it being necessary. to have recourse to an additional device to prevent that the fixed end is detached involuntarily, for example by gravity or under the action of the centrifugal force.
  • the end of the sheet to be fixed is folded and preferably reinforced by a steel blade so that it is rigid and it is pushed into the insertion slot, the folding edge first and the folded part against the wall provided with the receiving groove.
  • the folded end behaves like a spring which relaxes as soon as its free end is facing the receiving groove, from this moment the sheet is no longer pushed but slightly pulled outward from the slot so that the entire folded portion is engaged in the groove.
  • the sheet is pushed as previously towards the inside of the slot until the folded part leaves the groove and is in the enlarged housing inside which the end unfolds. completely the part engaged in the slot can be removed.
  • the walls of the slot may be parallel to the median plane of the slot which is simultaneously a radial plane of the cylinder.
  • om can also use the cylinder in printing machines, for example rotary machines for intaglio printing, the cylinders of which have a linear load. particularly high.
  • the blankets covering the printing cylinders of these machines consist of a canvas or a fine fabric covered externally with a layer of rubber. The total thickness of such a blanket is of the order of 0.4 to 0.7 mm.
  • the sheet 3 to be fixed on the mantle 1 of the cylinder 2 of a printing machine is a blanket with a thickness of approximately 0.5 mm.
  • the cylinder 2 is provided with an insertion slot 6 open on the mantle 1 so as to be able to bring one or both ends 7, 8 of the blanket 3 to a fixing device 9, 11.
  • the insertion slot 6 preferably has two walls 12, 13 parallel to each other and parallel to the median plane of the slot 6 represented by the line r which is simultaneously a radial plane of the cylinder.
  • the width d of this slot 6 is approximately 4 mm.
  • the insertion slot 6 is wide enough to allow it to slide and push towards the center of the cylinder the folded and reinforced end 7 of the blanket 3, reinforcement consisting of a spring steel strip 14 of a thickness , for example 0.2 mm and 5 mm wide, glued to the folded end of the blanket 3.
  • the opening angle y between the end 7 and the blanket 3 should be only a few degrees ( 5-15 °) when inserting the folded end 7 into the insertion slot 6 (fig. 3).
  • the radial slot 6 forms at its inner part a housing 16 parallel to the axis of the cylinder 2, the cross section of which widens inwards.
  • the housing 16 is limited by an inclined part 17 of the wall 12 and the second wall 13 of the slot 6.
  • the acute angle a between the external part of the wall 12 and the inclined part is of the order of 20 °.
  • the enlarged housing 16 opens for example on a cylindrical hole 18 for tension pivot, hole coaxial with the cylinder, and where the tension pivot 19 is housed.
  • the tension pivot 19 has a groove 21 parallel to the axis of the cylinder 2 and used for fixing the second reinforced end 8 of the blanket 3.
  • a groove 22 has been inserted parallel to the axis of the cylinder which extends over the entire length of cylinder 2 and whose profile is rectangular.
  • the median plane 23 of the groove shows, with respect to wall 12, an opening angle ⁇ varying between 5 ° and 45 °, but preferably being 30 °.
  • the width c of the groove 22 is chosen so that there is still just enough room for the reinforced end 7 of the blanket 3.
  • the depth g of the receiving groove 22 is slightly greater than the width of the first reinforced end 7 of the blanket 3.
  • the blanket 3 is folded at its first end 7, just behind the spring steel strip 14, so as to be against the side of the insertion slot 6 in which the receiving groove 22 is located (fig. 3 ). In doing so, the blanket 3 rests so that its outer side 26 is against the mantle 1 of the cylinder 2. Then the folded end 7, in this folded form, is inserted, from the mantle 1, into the slot Insertion 6, using a piece of thin sheet metal or a spatula. It is advisable to contribute to a good insertion by repeatedly pushing the folded end along the insertion crack 6. Since, during folding, the width 1 of the folded end 7 has been chosen so to be barely greater than the width d of the insertion slot 6, the folded end 7, by sliding in the insertion slot 6, can only open very slightly.
  • the opening angle y of the folded end 7 increases under the effect of the return force of the blanket 3 and the front part 27 slides in the receiving groove 22. If one then pulls, towards the circumference of the cylinder, on the blanket 3 now hooked, the first end 7 enters the groove longitudinal 22 up to the height of the blanket folding edge 3. The blanket 3 is then folded down and its second end 8 is introduced into the groove 21 of the tension pivot 19, passing through the insertion slot 6. By turning the tension pivot 19, the blanket 3 is stretched, in a known manner.
  • the blanket 3 can of course rest on a covering 4.
  • the fixing device can also be used for other applications, for example for fixing the blankets to a blanket cylinder of an offset printing machine provided that the thickness of the blanket is not too much large to be foldable.
  • a blanket having a thickness of 0.4 to 0.7 mr can in fact be fixed to the cylinder by means of the device described above.

Claims (6)

1. Einrichtung zum Befestigen eines Endes eines elastischen, biegesteifen Tuches, insbesondere eines Gummituches, auf einem Zylinder einer Rotationsdruckmaschine, wobei der Zylinder mit einem radialen, sich parallel zur Zylinderachse erstreckenden Einfürungsspalt für das eine, umgebogene Ende des Tuches versehen ist, dadurch gekennzeichnet, dass der radiale Einführungsspatt (6) in seinem innen liegenden Bereich eine Erweiterung (16) bildet, deren Querschnitt sich in Richtung auf die Zylinderachse vergrössert und deren innerer Boden in Umfangsrichtung eine Breite (b) hat, die grösser als die Breite (1) des umgebogenen Teils (7) des Endes des Tuches (3) ist, dass in einer der Wände (12, 13) des Einführungsspaltes (6) eine zur Achse des Zylinders (2) parallele Aufnahmenut (22) für den umgebogenen Teil (7) des Tuchendes vorgesehen ist, wobei diese Aufnahmenut mit dem sich nach aussen erstreckenden Bereich der erwähnten Wand (12) einen spitzen Winkel (ß) bildet, und dass die maximale Breite (d) des äusseren, sich über die Aufnahmenut (22) hinaus erstreckenden Bereichs des Einführungsspaltes (6) kleiner als die Breite (I) des umgebogenen Teils (7) des Endes des Tuches (3) ist.
2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das umgebogene Ende (7) des Tuches mit einem Federstahlband (14) versehen ist.
3. Einrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass wenigstens eine der Wände (12, 13) des Einführingsspaltes (6) parallel zu einem Zylinderradius orientiert ist.
4. Einrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der erwähnte spitze Winkel (ß), den die Aufnahmelängsnut (22) mit der Wand (12) des Einführungsspaltes (6) bildet, zwichen 5° und 45°, vorzugsweise 30°, beträgt.
5. Einrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Erweiterung (16) des Einführungsspaltes (6) einerseits durch einen geneigten Teil (17) der die Aufnahmelängsnut (22) aufweisenden Wand (12) und andererseits durch den inneren Bereich der anderen Wand (13) des Einführungsspaltes (6) gebildet wird, wobei dieser innere Bereich in derselben Ebene wie der äussere Bereich dieser Wand (13) liegt und sich die Erweiterung (16) zur Zylinderachse hin verbreitert.
6. Einrichtung nach Anspruch 5, dadurch gekennzeichnet, dass der spitze Winkel (a), welchen die Ebene des äusseren Teils der die Aufnahmelängsnut (22) aufweisenden Wand (12) mit der Ebene des geneigten Teils (17) dieser Wand einschliesst, ungefähr 20° beträgt.
EP83201871A 1983-01-18 1983-12-29 Einrichtung zum Befestigen von biegsamen Folien auf einem Zylinder einer Rotationsdruckmaschine Expired EP0114446B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83201871T ATE20326T1 (de) 1983-01-18 1983-12-29 Einrichtung zum befestigen von biegsamen folien auf einem zylinder einer rotationsdruckmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH25883 1983-01-18
CH258/83 1983-01-18

Publications (3)

Publication Number Publication Date
EP0114446A2 EP0114446A2 (de) 1984-08-01
EP0114446A3 EP0114446A3 (en) 1984-08-22
EP0114446B1 true EP0114446B1 (de) 1986-06-11

Family

ID=4182904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83201871A Expired EP0114446B1 (de) 1983-01-18 1983-12-29 Einrichtung zum Befestigen von biegsamen Folien auf einem Zylinder einer Rotationsdruckmaschine

Country Status (9)

Country Link
US (1) US4584942A (de)
EP (1) EP0114446B1 (de)
JP (1) JPS59138455A (de)
AT (1) ATE20326T1 (de)
AU (1) AU562876B2 (de)
CA (1) CA1213466A (de)
DD (1) DD212006A1 (de)
DE (1) DE3364104D1 (de)
SU (1) SU1306470A3 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4738200A (en) * 1985-03-14 1988-04-19 M.A.N. Roland Druckmaschinen Aktiengesellschaft Rubber blanket cylinder for a rotary offset printing machine
US4702166A (en) * 1986-08-28 1987-10-27 Rockwell International Corporation Plate lock-up mechanism for printing presses
JPH09300588A (ja) * 1996-05-17 1997-11-25 Mitsubishi Heavy Ind Ltd 輪転機のブランケット装着方法および装着装置
US5979272A (en) * 1997-02-10 1999-11-09 Artos Engineering Company Device for gathering, cutting and stripping insulated wire
EP1602482A1 (de) * 2004-06-03 2005-12-07 Kba-Giori S.A. Intaglio Druckmaschine mit Phasenzylindervorrichtung
TWI316466B (en) * 2007-03-09 2009-11-01 Ind Tech Res Inst Mold structure and the manufacturing method thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2285116A (en) * 1938-10-12 1942-06-02 Interchem Corp Printing plate
US2209127A (en) * 1938-12-19 1940-07-23 United Autographic Register Co Apparatus for attaching printing plates to a cylinder
US2850970A (en) * 1955-04-22 1958-09-09 Levey Fred K H Co Inc Lock-up
DE1213861B (de) * 1956-02-24 1966-04-07 Gerhard Ritzerfeld Rotationsvervielfaeltiger mit einem Druckzylinder zum Aufspannen von duennen biegsamen Druckformfolien
US2986085A (en) * 1959-04-13 1961-05-30 Cottrell Company Printing cylinders for rotary web presses
US3844214A (en) * 1971-11-01 1974-10-29 Dayco Corp Printing blanket bar assembly with edging strip locking means

Also Published As

Publication number Publication date
ATE20326T1 (de) 1986-06-15
EP0114446A2 (de) 1984-08-01
CA1213466A (en) 1986-11-04
US4584942A (en) 1986-04-29
DD212006A1 (de) 1984-08-01
AU562876B2 (en) 1987-06-18
SU1306470A3 (ru) 1987-04-23
DE3364104D1 (en) 1986-07-17
AU2310384A (en) 1984-07-19
EP0114446A3 (en) 1984-08-22
JPS59138455A (ja) 1984-08-08
JPH0152186B2 (de) 1989-11-08

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