Spray dampening system for offset press

Details Spray dampening system for offset press Spray dampening system for offset press

1988-10-26

1990-06-12

Burr, Edgar S.

Printing

Planographic

Dampeners

29132, B41L 2304

Patent

active

049323199

ABSTRACT:
The disclosed dampening system employs rolls which are frictionally driven by the plate roll of an offset printing press to distribute a dampening fluid over the surface of the plate roll. The system employs a rubber form roll which is in frictional engagement with the peripheral surface of the plate roll and is thus frictionally driven by the plate roll. A water feed roll having a ceramic surface is in frictional engagement with the form roll so that the feed roll will be frictionally driven by the form roll. Dampening fluid is sprayed onto the surface of the feed roll by spray nozzles, flickers or slingers, and the feed roll is axially reciprocated relative to the form roll while it is being frictionally driven by the form roll and while the dampening fluid is being applied to its surface so that the dampening fluid will be transferred to and distributed over the surface of the form roll by the feed roll and will in turn be transferred to and distributed over the surface of the plate roll by the form roll.

REFERENCES:
patent: 2429390 (1947-10-01), Case
patent: 3130602 (1964-04-01), Nigrelli et al.
patent: 3983812 (1976-10-01), Schramm
patent: 3994222 (1976-11-01), Pullen
patent: 4064801 (1977-12-01), Switall
patent: 4088074 (1978-05-01), Dahlgren et al.
patent: 4385559 (1983-05-01), Jarach
patent: 4515078 (1985-05-01), Diffipp
patent: 4649818 (1987-03-01), Switall et al.
patent: 4708058 (1987-11-01), Smith
patent: 4794680 (1989-01-01), Meyerhoff et al.

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