Printing – Inkers – Roller
Patent
1997-06-20
1998-10-20
Fisher, J. Reed
Printing
Inkers
Roller
101148, B41F 3106, B41F 3110, B41F 3114
Patent
active
058231099
ABSTRACT:
An offset printing system includes an improved inking unit for applying ink to a rotatable plate cylinder, wherein the inking unit appreciably reduces the production of contaminants. In particular, the inking unit one or more ink application rollers that adjacently contact the plate cylinder. A series of rollers are in ink communication with these application rollers, including at least one inking roller in direct contact with the ink application rollers, and at least one inking roller in indirect inking communication with the ink application rollers. The inking rollers are driven in a positively locking manner and which are drivable at a peripheral speed that differs from the peripheral speed of the plate cylinder, and the inking roller furthest from the plate cylinder is driven with the greatest peripheral speed differential relative to the plate cylinder. This peripheral speed differential between rollers results in a relative slippage and wiping effect which advantageously reduces the effect of contaminants.
REFERENCES:
patent: 3467008 (1969-09-01), Domotor
patent: 4397236 (1983-08-01), Greiner et al.
patent: 5265527 (1993-11-01), Tedford
patent: 5345865 (1994-09-01), Kemp
Hummel Peter
Ortner Robert
Fisher J. Reed
MAN Roland Druckmaschinen AG
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