Sheet turn-over apparatus for sheet-fed rotary printing press

Details Sheet turn-over apparatus for sheet-fed rotary printing press Sheet turn-over apparatus for sheet-fed rotary printing press

1987-11-12

1989-04-25

Crowder, Clifford D.

Printing

Rolling contact machines

Rotary

B41F 502

Patent

active

048236950

ABSTRACT:
In a sheet turn-over apparatus for a sheet-fed rotary printing press, the right cams are a turn-over cam for gripper units A and opening/closing cams for gripper units B, while the left cams are a turn-over cam for gripper units B and opening/closing cams for gripper units A. The cams cooperate with the corresponding torsion bars arranged at the pivotal centers of cam levers to turn over and open/close the gripper units A and B. The cams are fixed at predetermined positions of frames and need not be shifted in the single side printing and double side printing. The gripper opening/closing cams need not be shifted in the non-turn-over and turn-over modes.

REFERENCES:
patent: 3796154 (1974-03-01), Weisgerber
patent: 4700626 (1987-10-01), Iwamoto et al.

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