Perfecting or multicolor offset printing press

Details Perfecting or multicolor offset printing press Perfecting or multicolor offset printing press

1979-08-21

1981-02-17

Fisher, J. Reed

Printing

Multicolor

Rotary machines

101180, 101182, 101221, B41F 1328, B41F 1340, B41F 710

Patent

active

042508096

ABSTRACT:
A web fed offset printing press unit (42) including a frame (12), an auxiliary frame (44), a pair of plate cylinders (46 and 46a), a first blanket cylinder (48), a second blanket cylinder (50), a common impression cylinder (56) and an auxiliary impression cylinder (58) is disclosed. The second blanket cylinder is swung bodily through a short radius arc between a first end position in rolling contact with the common impression cylinder and a second end position in rolling contact with the auxiliary impression cylinder.
In one arrangement, the second blanket cylinder is journaled in an eccentric sleeve (76) at each end and linkage (86) is switchable between the two modes of operation with a throw-off position associated with each.
A method for converting a web fed letterpress unit (10) into a web fed offset printing press unit for multicolor or two-sided printing is disclosed.

REFERENCES:
patent: 3329086 (1967-07-01), Pullen
patent: 3983811 (1976-10-01), Fuchs et al.

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