Plate cylinder side register adjustment

Details Plate cylinder side register adjustment Plate cylinder side register adjustment

1978-08-25

1980-07-29

Fisher, J. Reed

Printing

Rolling contact machines

Rotary

101137, 101148, 101175, 101247, 101352, B41F 708, B41F 1314, B41F 3130

Patent

active

042145287

ABSTRACT:
A two-color offset printing press having two plate cylinders simultaneously engageable with a single blanket cylinder is disclosed. The plate cylinders and the blanket cylinder are rotatably mounted on a printer head fixed to the mainframe of the press. A first set of dampening and inking rollers is mounted on the printer head and engageable with one of the plate cylinders. A second set of dampening and inking rollers, engageable with the other plate cylinder, is mounted on a ball bushing supported carriage linearly movable to and from the printer head along a pair of parallel rails fixed to the mainframe. Image registry between the two plate cylinders is established by an operator-accessible adjustment mechanism for shifting one of the plate cylinders back and forth along its axis of rotation. An electrical safety interlock system precludes operator access to the carriage-associated plate cylinder during predetermined operating modes of the press.

REFERENCES:
patent: 2670679 (1954-03-01), Stephenson
patent: 2801584 (1957-08-01), Davidson
patent: 3014421 (1961-12-01), Townsend
patent: 3092022 (1963-06-01), Raybuck
patent: 3223028 (1965-12-01), Brigham
patent: 3404626 (1968-10-01), Stephenson
patent: 3521559 (1970-07-01), Sejeck et al.
patent: 3664261 (1972-05-01), Dahlgren
patent: 3847079 (1974-11-01), Dahlgren

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