Printing press having a plurality of printing stations

Details Printing press having a plurality of printing stations Printing press having a plurality of printing stations

1980-07-03

1983-03-01

Burr, Edgar S.

Printing

Multicolor

Rotary machines

101185, 101234, 101246, 101247, 101349, B41F 518

Patent

active

043751903

ABSTRACT:
Paper gripper improvement in a printing press of the type having a frame, a large paper carrying impression cylinder drum mounted on the frame and a plurality of retractable printing stations mounted on the frame and spaced around the drum. Each gripper has a stationary finger and a second finger reciprocatable with respect to the stationary finger. A cam is connected to operate the reciprocatable finger to grip the paper as it is fed onto the drum. To detect a missing paper, an electrical circuit is completed by contact between the stationary finger and the reciprocatable finger in the absence of a paper between them insulating them from each other, whereby the need for photo-cells or other detectors to detect missing papers is eliminated. The inking rollers are driven separately from the drum to facilitate retracting the printing stations in the event of a missing paper.

REFERENCES:
patent: 1653198 (1927-12-01), Belcher
patent: 2392391 (1946-01-01), Kaddeland
patent: 2525931 (1950-10-01), Morse
patent: 3190218 (1965-06-01), Willard
patent: 3191530 (1965-06-01), Fath et al.
patent: 3521554 (1970-07-01), Zurick
patent: 3595164 (1971-07-01), Hovekamp
patent: 3768406 (1973-10-01), Gutsche et al.
patent: 3869983 (1975-03-01), Garber et al.

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