Zone controlled dampening means

Details Zone controlled dampening means Zone controlled dampening means

1979-04-12

1981-06-02

Fisher, J. Reed

Printing

Planographic

Dampeners

101365, 101366, B41F 730, B41L 2506

Patent

active

042704510

ABSTRACT:
In a printing press of the lithographic type, a dampening system regulates the flow of dampening solution onto the oscillating roller for application to an adjacent dampener roller and then onto a plate cylinder. The dampening means includes a plurality of circumferentially grooved, longitudinally spaced discs, axially aligned and positioned adjacent to the oscillating roller. The grooved circumferences of the discs are so positioned as to be rotatable through a dampening solution source. A plurality of individually actuable means is each so positioned as to direct air under pressure at one of the grooved circumferences of the discs towards the oscillating roller. In this way dampening solution from the circumferential groove is directed into a fine spray onto the periphery of a section or zone of the oscillating roller. The system also includes means for controlling the amount of air directed from one of the air pressure means independent of every other air pressure means.

REFERENCES:
patent: 1667291 (1928-04-01), Lavett
patent: 2622520 (1952-12-01), Hauser et al.
patent: 3094065 (1963-06-01), Roberts

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