Spray dampening system for high quality offset printing

Details Spray dampening system for high quality offset printing Spray dampening system for high quality offset printing

1975-12-05

1977-08-30

Fisher, J. Reed

Printing

Planographic

Dampeners

101366, B41F 730

Patent

active

040446743

ABSTRACT:
Dampening rolls receive spray from a multi-nozzle spray member having a spray path extending beyond the ends of the rolls. Overspray preventing shields are mounted at opposite ends of the spray path and have free dripping lower portions positioned over the dampening rolls. An oscillating roll runs against a dampening roll to spread the moisture film and a wet form roll provides contact between the oscillating roll and the plate cylinder. Preferably, the spray member oscillates transversely along the dampening rolls and separate shields are mounted on the spray member and fixed with respect to the press frame.

REFERENCES:
patent: 2408449 (1946-10-01), Russell
patent: 2448226 (1948-08-01), Marsden
patent: 2960929 (1960-11-01), Erzinger
patent: 3072049 (1963-01-01), Huebner
patent: 3094065 (1963-06-01), Roberts
patent: 3139028 (1964-06-01), Huebner
patent: 3282273 (1966-11-01), Johnston et al.
patent: 3302296 (1967-02-01), Holmwood et al.
patent: 3308754 (1967-03-01), Munn
patent: 3431842 (1969-03-01), Winkler et al.
patent: 3508489 (1970-04-01), Norton
patent: 3651756 (1972-03-01), Smith, Jr.
patent: 3924531 (1975-12-01), Klingler

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