Arrangement on multi-color rotary presses for application of liq

Details Arrangement on multi-color rotary presses for application of liq Arrangement on multi-color rotary presses for application of liq

1984-09-10

1986-02-04

Fisher, J. Reed

Printing

Planographic

Dampeners

101352, 118258, B41F 740, B41L 2516

Patent

active

045678235

ABSTRACT:
The dampening unit of a rotary printing press is provided with additional transmission components and a swiveling stop mechanism so that the dampening unit can also apply a varnish having an arbitrary viscosity. For applying dampening solution to the plate cylinder (5) of the rotary press, the dampening unit has a fountain roller (13) feeding a transfer roller (15) and an applicator roller (16) which are driven by the press drive. When the dampening unit is used as a varnishing unit, clutches (28, 29) are enabled and disabled so that the transfer roller (15) is driven by a separate drive (17) which rotates the fountain roller (13). The applicator roller (16) is selectively thrown off by pneumatic actuators (32, 35) in such a way that all rollers (14-16) of the dampening unit are connected to each other and can be driven by the separate drive (17). A third position is also defined wherein the applicator roller (16) is also selectively thrown off 5/10 mm from the transfer roller (15). When the applicator roller (16) is thrown off the plate cylinder (11), the fountain roller (16) is preferably thrown on and off periodically by a pneumatic actuator (39).

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patent: 3842735 (1974-10-01), Southam et al.
patent: 3991674 (1976-11-01), Petri

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