EP 0183984 A3 19871021 - PRINTING UNIT FOR A ROTARY OFFSET-PRINTING PRESS
Title (en)
PRINTING UNIT FOR A ROTARY OFFSET-PRINTING PRESS
Publication
Application
Priority
DE 8434353 U 19841123
Abstract (en)
[origin: US4643095A] A printing unit cylinder of a given diameter for offset rotary printing machines having a galvanically applied wear and corrosion-resistant jacket surface coating, comprising a cylinder body formed with a cylinder channel and having a transitional surface from a cylindrical jacket surface thereof to the cylinder channel, the cylindrical jacket surface and the transitional surface having a sand-blasted surface roughness of 10 to 20 microns, a nickel undercoating having a hardness of 180 to 220 Vickers hardness disposed on the cylindrical jacket surface and the transitional surface; and a chromium layer disposed on the undercoating and having a hardness of greater than 900 Vickers hardness and a microcracked surface of greater than 400 cracks per cm2, the cylinder body having a diameter less than the given diameter of the printing unit cylinder by a thickness corresponding to the superimposed thicknesses of the nickel chromium and the chromium layer.
IPC 1-7
IPC 8 full level
B41N 1/20 (2006.01); B41F 13/08 (2006.01)
CPC (source: EP US)
B41F 13/08 (2013.01 - EP US)
Citation (search report)
- [X] EP 0017776 A1 19801029 - HEIDELBERGER DRUCKMASCH AG [DE]
- [A] DE 3023246 A1 19810108 - POLYGRAPH LEIPZIG
- [A] DE 2602277 A1 19760729 - ADAMOVSKE STROJIRNY NP
Designated contracting state (EPC)
FR GB
DOCDB simple family (publication)
EP 0183984 A2 19860611; EP 0183984 A3 19871021; EP 0183984 B1 19890405; DE 8434353 U1 19850221; JP 2545646 Y2 19970825; JP S6193235 U 19860616; US 4643095 A 19870217
DOCDB simple family (application)
EP 85113767 A 19851029; DE 8434353 U 19841123; JP 17694185 U 19851119; US 80147685 A 19851125