EP0136707A2 - Plattenzylinder für eine Druckmaschine - Google Patents

Plattenzylinder für eine Druckmaschine Download PDF

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Publication number
EP0136707A2
EP0136707A2 EP84111826A EP84111826A EP0136707A2 EP 0136707 A2 EP0136707 A2 EP 0136707A2 EP 84111826 A EP84111826 A EP 84111826A EP 84111826 A EP84111826 A EP 84111826A EP 0136707 A2 EP0136707 A2 EP 0136707A2
Authority
EP
European Patent Office
Prior art keywords
plate
printing plate
plate cylinder
resin
cylinder
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.)
Withdrawn
Application number
EP84111826A
Other languages
English (en)
French (fr)
Other versions
EP0136707A3 (de
Inventor
Ryuzo Katsumata
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.)
Tetra Pak AB
Original Assignee
Tetra Pak AB
Tetra Pak International AB
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 Tetra Pak AB, Tetra Pak International AB filed Critical Tetra Pak AB
Publication of EP0136707A2 publication Critical patent/EP0136707A2/de
Publication of EP0136707A3 publication Critical patent/EP0136707A3/de
Withdrawn legal-status Critical Current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

Definitions

  • a flexographic printer as shown in Fig. 3, printing ink is applied by an inking roller B to a rubber printing plate mounted over the outer peripheral surface of a rotating plate cylinder A and, for example, a sheet of cardboard D used for packaging is passed between the plate cylinder A and an impression cylinder C to effect the desired printing on the surface of the cardboard-D.
  • the rubber printing plate used in such a printer although very capable of absorbing the vibrations generated during the operation of the printer, soon becomes worn and can not last for long. It also presents problems concerning pressure resistance and manufacturing cost.
  • a resin printing plate would have cost and pressure resistance advantages, but on the other hand, because of the innate hardness of resins, such a resin printing plate would be very hard so that uneven printing could result from its use. Such a plate would also be unable to sufficiently absorb the vibrations generated during the printers operation, so that it could even be impossible in some cases to perform the printing operation. If specific type of resin which is photosensitive is used, it would be possible to produce identical plates in bulk by a baking technique, and also the plate producing process would be greatly simplified.
  • the present device relates to an improvement in a plate cylinder for a printer, and the object of the device is to remove the defects involved when using 'resin for the printing plate, while maintaining the advantages of such a resin plate, and for this purpose, the device features the incorporation of a cushioning medium between the outer peripheral surface of the plate cylinder and the resin printing plate mounted thereon.
  • An aluminum plate 1 is attached over the outermost layer of a roll-shaped plate cylinder A, and part of the aluminum plate 1 is provided with means for securing a resin printing plate 2 over the entire width of the plate cylinder A.
  • the securing means in the embodiment shown in Figs. 1 and 2, comprises two slots or recesses 3 and 4, one of them (3) extending linearly inward, and the other (4) having an internal portion formed as a chamber which is circular in section.
  • the two slots 3 and 4 are adjacent to each other along the widthwise direction of the plate cylinder A.
  • One edge 2a of the resin printing plate 2 would around the outer periphery of the cylinder A is inserted into the slot 3, and the other edge 2b of the printing plate is inserted into a notch in a holder 5 placed in the chamber within the slot 4 to secure the printing plate in position.
  • the holder 5 within the chamber in the slot 4 is turned counterclockwise in Figs.
  • the resin printing plate 2 is tightened over the outer peripheral surface of the cylinder A, and a rounded projection 7 is pushed into the holster-housing chamber by the force of a spring 6, and is pressed against and engages with a flat part on the outer peripheral surface of the holder 5 to lock the holder 5 in the chamber, so that the printing plate 2 is secured tightly over the outer peripheral surface of the plate cylinder A.
  • a cushioning medium 8 is interposed between the resin printing plate 2 and the outer peripheral surface of the plate cylinder A.
  • the cushioning medium 8 used in the present device could be a sponge material, and it .could be secured to the outer peripheral surface of the plate cylinder A by, for example, doulbe-sided adhesive tape.
  • this cushioning medium between the outer peripheral surface of the plate cylinder A and the resin printing plate 2 has the effect of counteracting the hardness of the resin plate 2 to maintain the moderate resiliency necessary for printing, thereby eliminating the danger of uneven printing, and enabling a good finish.
  • backing plates 9 and 10 are provided at the inlets of the slots 3 and 4, respectively, the backing plates 9 and 10 being provided with raised portions or protuberances 9a and 10a, respectively, along the adjacent edges thereof, the protuberances 9a and 10a being designed to support the printing plate 2 by slightly raising it.
  • the backing plates have the following effect.
  • the present device because of the use of a resin printing plate instead of rubber one, provides cost and pressure resistance advantages, and also, since the hardness inherent to the resin material is counter- acted by the cushioning medium 8 between the outer peripheral surface of the plate cylinder A and the printing plate 2, the possibility of uneven printing or the generation of vibrations in the plate cylinder during operation is eliminated or minimized.
  • the thickness of the printing plate can be greatly reduced. This thickness could, for instance, be less than 1.7 mm, and it has been confirmed by laboratory tests that a satisfactory result is obtained by using a printing plate of a thickness less than that required when no cushioning medium is provided.
  • the present device has been described by way of an embodiment using a printing plate of the type which is secured to the plate cylinder by a securing means as explained above, but it is of course similarly applicable to a sleeve-like plate fitted over the plate cylinder from the side thereof.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
EP84111826A 1983-10-03 1984-10-03 Plattenzylinder für eine Druckmaschine Withdrawn EP0136707A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP15427983U JPS6062942U (ja) 1983-10-03 1983-10-03 印刷機用版胴
JP154279/83 1983-10-03

Publications (2)

Publication Number Publication Date
EP0136707A2 true EP0136707A2 (de) 1985-04-10
EP0136707A3 EP0136707A3 (de) 1987-05-27

Family

ID=15580680

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111826A Withdrawn EP0136707A3 (de) 1983-10-03 1984-10-03 Plattenzylinder für eine Druckmaschine

Country Status (4)

Country Link
EP (1) EP0136707A3 (de)
JP (1) JPS6062942U (de)
AU (1) AU3381184A (de)
DE (1) DE136707T1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0418991A2 (de) * 1989-09-21 1991-03-27 Komori Corporation Plattenaufwicklungsvorrichtung
CN106113907A (zh) * 2016-07-21 2016-11-16 江苏华宇印涂设备集团有限公司 橡皮滚筒
CN106183365A (zh) * 2016-07-21 2016-12-07 江苏华宇印涂设备集团有限公司 带有橡皮滚筒的印铁机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4702166A (en) * 1986-08-28 1987-10-27 Rockwell International Corporation Plate lock-up mechanism for printing presses

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2127709A5 (de) * 1971-03-05 1972-10-13 Grace W R Ltd
DE2310987A1 (de) * 1972-03-06 1973-09-13 Albert Blicher Christoffersen Druckzylinder
US4047481A (en) * 1976-03-01 1977-09-13 Container Graphics Corporation Apparatus for printing indicia on corrugated board and the like

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS488302U (de) * 1971-06-12 1973-01-30
JPS5035762U (de) * 1973-07-31 1975-04-15
JPS5222322U (de) * 1975-08-06 1977-02-17
JPS5523740U (de) * 1978-07-31 1980-02-15
JPS5715743Y2 (de) * 1978-12-26 1982-04-01

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2127709A5 (de) * 1971-03-05 1972-10-13 Grace W R Ltd
DE2310987A1 (de) * 1972-03-06 1973-09-13 Albert Blicher Christoffersen Druckzylinder
US4047481A (en) * 1976-03-01 1977-09-13 Container Graphics Corporation Apparatus for printing indicia on corrugated board and the like

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0418991A2 (de) * 1989-09-21 1991-03-27 Komori Corporation Plattenaufwicklungsvorrichtung
EP0418991A3 (en) * 1989-09-21 1991-07-03 Komori Corporation Plate winding apparatus
CN106113907A (zh) * 2016-07-21 2016-11-16 江苏华宇印涂设备集团有限公司 橡皮滚筒
CN106183365A (zh) * 2016-07-21 2016-12-07 江苏华宇印涂设备集团有限公司 带有橡皮滚筒的印铁机

Also Published As

Publication number Publication date
JPS6062942U (ja) 1985-05-02
EP0136707A3 (de) 1987-05-27
JPH0318188Y2 (de) 1991-04-17
DE136707T1 (de) 1986-02-27
AU3381184A (en) 1985-04-18

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

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Effective date: 19871124

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Inventor name: KATSUMATA, RYUZO