EP 0194618 B1 19890510 - BLANKET CYLINDER FOR WEB-FED OFFSET ROTARY PRINTING MACHINES
Title (en)
BLANKET CYLINDER FOR WEB-FED OFFSET ROTARY PRINTING MACHINES
Publication
Application
Priority
DE 3509046 A 19850314
Abstract (en)
[origin: US4738200A] To prevent entirely, or at least largely, loss of contact of a pair of blanket cylinders as they roll off against each other upon passing the respective clamping grooves of the rubber blanket cylinders, the rubber blanket cylinders adjacent the edges of the clamping groove (13,14) are formed with transition zones (15,17; 16,18) which rise above a circle formed by the cylinders, in cross section. The rise (Y) is in accordance with a non-circular mathematical function, and, for a cylinder of, for example, about 20 cm diameter, can be in the order of 0.1 mm. At operating speeds of current rotary offset printing machines, the rubber blankets will hardly lose contact from each other and thus stripping formation, due to oscillations of the blanket cylinders as they roll off against each other, is effectively eliminated.
IPC 1-7
IPC 8 full level
B41F 13/08 (2006.01); B41F 7/20 (2006.01); B41F 13/18 (2006.01); B41F 30/02 (2006.01)
CPC (source: EP US)
B41F 13/18 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE FR GB IT LI SE
DOCDB simple family (publication)
EP 0194618 A2 19860917; EP 0194618 A3 19871014; EP 0194618 B1 19890510; DE 3663232 D1 19890615; JP S61213157 A 19860922; US 4738200 A 19880419
DOCDB simple family (application)
EP 86103096 A 19860307; DE 3663232 T 19860307; JP 5382886 A 19860313; US 82941886 A 19860213