Offset printing device for a rotary printing machine

Details Offset printing device for a rotary printing machine Offset printing device for a rotary printing machine

1997-06-20

1999-12-28

Fisher, J. Reed

Printing

Inkers

Roller

B41F 3110, B41L 2712

Patent

active

060066644

ABSTRACT:
An offset printing device is provided for a rotary printing machine having a plate cylinder carrying a dry flatbed printing plate, the printing device having an improved inking unit which reduces the occurrence and effect of contaminants. In the inking unit, at least one ink application roller, which is frictionally engaged against the plate cylinder during printing, is drivable by at least one positively driven inking roller at a peripheral speed which is different from the peripheral speed of the plate cylinder. In an embodiment, a plurality of ink application rollers contact the plate cylinder and are respectively driven at successively differing peripheral speeds.

REFERENCES:
patent: 3467008 (1969-09-01), Domotor
patent: 5272971 (1993-12-01), Fredericks
patent: 5345865 (1994-09-01), Kemp
patent: 5562031 (1996-10-01), Garner et al.

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