Mounting means for movable carriage on an offset press

Details Mounting means for movable carriage on an offset press Mounting means for movable carriage on an offset press

1978-08-25

1980-09-16

Fisher, J. Reed

Printing

Planographic

Multicolor

101148, 101177, 101185, 101247, 101351, 101248, B41F 708, B41F 740, B41F 3134

Patent

active

042223253

ABSTRACT:
A two-color offset printing press having two plate cylinders simultaneously engageable with a single blanket cylinder is disclosed. The plate cylinders and a 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: 3041966 (1962-07-01), Polglase, Jr.
patent: 3516289 (1970-06-01), MacGeorge et al.
patent: 3521559 (1970-07-01), Sejeck et al.
patent: 3991674 (1976-11-01), Petri
patent: 4056056 (1977-11-01), Giori
Thomson Ball Bushings for Linear Motion, Ball Bushing Catalog Form, 139, (Dec., 1976), Thomson Industries, Inc., Manhasset, N.Y.

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