Dampening unit for offset printing machines

Details Dampening unit for offset printing machines Dampening unit for offset printing machines

1976-07-23

1977-08-30

Fisher, J. Reed

Printing

Planographic

Dampeners

B41F 730

Patent

active

040446735

ABSTRACT:
Dampening unit for an offset printing machine includes at least one dampening unit roller, a container for dampening medium and a rotatable sprinkler roller disposed mutually adjacent one another, the sprinkler roller includes a shaft, a pair of discs disposed at opposite ends of the shaft and an envelope wettable by dampening medium from the containers and formed of a plurality of means displaceable in a rotary path for throwing onto the dampening-unit roller from a region of an edge of the envelope extending along the length of the sprinkler roller droplets of dampening medium withdrawn from the container, the plurality of throwing means being stressed in tension between the discs and extending parallel to the shaft, and traverse means carrying a plurality of fingers disposed adjacent to and spaced from the discs and having respective edges projecting into the rotary path of the plurality of throwing means.

REFERENCES:
patent: 2199093 (1940-04-01), Wolfenden
patent: 2622520 (1952-12-01), Hauser et al.
patent: 2954933 (1960-10-01), Clare
patent: 3008407 (1961-11-01), Roberts et al.
patent: 3043214 (1962-07-01), Christoff
patent: 3143065 (1964-08-01), Warczak
patent: 3545379 (1970-12-01), Norton
patent: 3759175 (1973-09-01), Alsop

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