Offset printing press with emulsification control

Details Offset printing press with emulsification control Offset printing press with emulsification control

1991-06-14

1993-11-30

Fisher, J. Reed

Printing

Planographic

Dampeners

B41F 726, B41F 3106

Patent

active

052655270

ABSTRACT:
An offset lithographic printing press has a source of ink (40), a source of dampening liquid (42), and a first means for transferring and emulsifying ink and dampening liquid. The first means includes a plate cylinder (12) for carrying a printing plate (18). A second means (96 or 150) is selectively actuatable while the plate cylinder (12) is rotating and transferring the image from the printing plate (18) to the material being printed (24). The second means (96 or 150), when actuated, causes the first means to emulsify ink and dampening liquid to minimize undesirable amounts of dampening liquid on the printing plate (18). A third means (100 or 200) selectively actuates the second means (96 or 150) when undesirable amounts of dampening liquid are present on the printing plate (18).

REFERENCES:
patent: 3467008 (1967-01-01), Domotor
patent: 3724368 (1973-04-01), Treff
patent: 3937141 (1976-02-01), Dahlgren
patent: 4351236 (1982-09-01), Beisel
patent: 4403867 (1983-09-01), Duke
patent: 4404908 (1983-09-01), Simeth
patent: 4481882 (1984-11-01), Rudolph
patent: 4677298 (1987-06-01), Zelmanovic et al.
patent: 4703690 (1987-11-01), Keller
patent: 4724764 (1988-02-01), MacPhee et al.

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