EP0194617A2 - Elément d'impression pour une rotative offset - Google Patents

Elément d'impression pour une rotative offset Download PDF

Info

Publication number
EP0194617A2
EP0194617A2 EP86103095A EP86103095A EP0194617A2 EP 0194617 A2 EP0194617 A2 EP 0194617A2 EP 86103095 A EP86103095 A EP 86103095A EP 86103095 A EP86103095 A EP 86103095A EP 0194617 A2 EP0194617 A2 EP 0194617A2
Authority
EP
European Patent Office
Prior art keywords
printing unit
circumferential direction
diameter
wedge
printing
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.)
Granted
Application number
EP86103095A
Other languages
German (de)
English (en)
Other versions
EP0194617A3 (en
EP0194617B1 (fr
Inventor
Ingo Köbler
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0194617A2 publication Critical patent/EP0194617A2/fr
Publication of EP0194617A3 publication Critical patent/EP0194617A3/de
Application granted granted Critical
Publication of EP0194617B1 publication Critical patent/EP0194617B1/fr
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
    • 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 invention relates to a printing unit, in particular for an offset rotary printing press with a blanket cylinder, the diameter of which is twice as large as the diameter of the associated plate cylinder and can be clamped onto the blankets using documents.
  • Such printing units are known from the specialist book by walenski, "Introduction to offset printing". From the same textbook it is also known to underlay the blankets to be clamped on a blanket cylinder so that a certain diameter is reached. In the generic machine, the plate cylinder rolls twice with one revolution of the blanket cylinder due to the predetermined diameter ratios, so that two identical print images are produced on one print carrier with one revolution of the blanket cylinder. It has been found that there are qualitative differences between these two printed images, which may consist, for example, in that the color intensity of one printed image differs from the color intensity of the other printed image.
  • FIG. 1 shows a printing unit which comprises two plate cylinders 1, 2 and two blanket cylinders 3, 4.
  • the diameters of the blanket cylinders 3, 4 correspond to twice the value of the diameters of the plate cylinders 1 and 2.
  • the plate cylinders 1, 2 can be covered with offset printing plates and the blanket cylinders 3 and 4 can be covered with blankets, for which purpose the cylinder pits, which are not described in more detail, are provided with appropriate clamping means are.
  • a print carrier 11 can be printed on both sides between the blanket cylinders 3 and 4.
  • a conventional impression cylinder can also be used instead of the second blanket cylinder 4. Both webs and sheets can be processed with such printing units.
  • the plate cylinders 1 and 2 each rotate twice, so that two identical printed images are formed on the circumference of each blanket cylinder 3 and 4 and are transferred to the printing medium 11.
  • the two printed images A and B which should have an identical appearance from a theoretical point of view, are not the same in practice.
  • blanket pads 5, 6 are used, the thickness of which, viewed in the circumferential direction, differs from conventional practice.
  • the thickness of the portion of the rubber blanket underlay 5 and 6 receiving the second printed image B changes, while the area of the underlay 5 and 6 assigned to the first printed image A is formed uniformly, that is to say has a constant diameter.
  • FIG. 2a shows the most preferred embodiment of the underlay 5 according to the invention, while FIG. 2a shows another variant in which the area 9 under the first printed image A has a uniform thickness, while the area 10 below the printed image B decreases in the circumferential direction.
  • a wedge 12 extending over the entire circumference of the double-sized blanket cylinder 3 or 4 is used on a base 11.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • Steering Control In Accordance With Driving Conditions (AREA)
  • Pens And Brushes (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
EP86103095A 1985-03-14 1986-03-07 Elément d'impression pour une rotative offset Expired - Lifetime EP0194617B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3509044 1985-03-14
DE3509044 1985-03-14

Publications (3)

Publication Number Publication Date
EP0194617A2 true EP0194617A2 (fr) 1986-09-17
EP0194617A3 EP0194617A3 (en) 1987-10-07
EP0194617B1 EP0194617B1 (fr) 1990-08-29

Family

ID=6265116

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103095A Expired - Lifetime EP0194617B1 (fr) 1985-03-14 1986-03-07 Elément d'impression pour une rotative offset

Country Status (3)

Country Link
EP (1) EP0194617B1 (fr)
JP (1) JPS61263756A (fr)
DE (1) DE3673668D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115106863A (zh) * 2022-08-25 2022-09-27 江苏盐城苏凌机械有限公司 基于五金产品加工的金属机箱平面用磨削装置
CN117532483B (zh) * 2023-12-26 2024-05-10 南通格冉泊精密模塑有限公司 一种铸造模具加工设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1201854B (de) * 1959-08-26 1965-09-30 Roland Offsetmaschf Verfahren zur Zurichtung von Gummituechern bei Offsetmaschinen
FR2157464A5 (fr) * 1971-10-16 1973-06-01 Maschf Augsburg Nuernberg Ag
EP0182156A2 (fr) * 1984-11-10 1986-05-28 KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT Machine d'impression offset

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1201854B (de) * 1959-08-26 1965-09-30 Roland Offsetmaschf Verfahren zur Zurichtung von Gummituechern bei Offsetmaschinen
FR2157464A5 (fr) * 1971-10-16 1973-06-01 Maschf Augsburg Nuernberg Ag
EP0182156A2 (fr) * 1984-11-10 1986-05-28 KOENIG & BAUER-ALBERT AKTIENGESELLSCHAFT Machine d'impression offset

Also Published As

Publication number Publication date
EP0194617A3 (en) 1987-10-07
JPS61263756A (ja) 1986-11-21
EP0194617B1 (fr) 1990-08-29
DE3673668D1 (de) 1990-10-04

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