Inking system on printing presses having provision for varying i

Details Inking system on printing presses having provision for varying i Inking system on printing presses having provision for varying i

1975-09-10

1976-10-05

Fisher, J. Reed

Printing

Inkers

Roller

101DIG14, B41F 3114, B41F 3100

Patent

active

039838129

ABSTRACT:
An inking system for a printing plate having a printing density which varies arbitrarily from the leading end of the plate to the trailing end including a source of ink film, rollers arranged in series between the source and the plate cylinder, the last roller in the series being a form roller in contact with the plate, with at least one of the rollers being a vibrated roller. Thrusting means are provided for imparting reciprocating movement to the vibrated roller. Means are provided for establishing a succession of sources of control signal at different levels tailored to the printing density of the plate at corresponding points about the periphery. A reference member coupled to the plate cylinder commutates the sources to produce a phased control signal which varies with ink need about the periphery of the plate. The control signal is utilized to vary the instantaneous velocity of the thrusting means inversely with the printing density of the plate so that ink is deposited on successive peripheral portions of the plate in a thickness tailored to need. In a preferred form of the invention a control board is used to set up the succession of sources of control signal visually corresponding to the profile of printing density, and hence ink need, at successive peripheral portions of the plate. The vibrated roller is preferably interposed between the source of ink and the form roller, but in a modified form of the invention the form roller itself is vibrated with variation in instantaneous velocity.

REFERENCES:
patent: 3412677 (1968-11-01), Kantor
patent: 3584579 (1971-06-01), Rothenberg
patent: 3765328 (1973-10-01), Treff

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