Plate lockup apparatus for printing press

Details Plate lockup apparatus for printing press Plate lockup apparatus for printing press

1991-05-17

1992-02-18

Wiecking, David A.

Printing

Flexible-sheet-securing devices

51364, 51367, 51368, 51370, 101378, B41F 128, B41F 2100

Patent

active

050884107

ABSTRACT:
A plate lockup apparatus for a printing press includes leading- and trailing-side plate lockup tables, leading- and trailing-side gripper plates, a plurality of plate gripper cams, spring members, and plate tightening cams. The leading- and trailing-side plate lockup tables axially extend on one side and the other side in a gap of a circumferential surface of a plate cylinder. The leading- and trailing-side gripper plates are pivotally supported to oppose the leading- and trailing-side plate lockup tables and are biased in a plate release direction. The plurality of plate gripper cams are mounted on a plate tightening pivot shaft and a trailing-side pivot shaft parallel to the leading- and trailing-side gripper plates at equal intervals and pivot the leading- and trailing-side gripper plates in a plate gripping direction upon pivotal movement of the pivot shafts. The spring members are interposed between the trailing-side plate lockup table and a wall surface of the gap and bias the trailing-side plate lockup table in a plate tightening direction. The plate tightening cams are mounted on the trailing-side pivot shaft and moves the trailing-side plate lockup table against the biasing forces of the spring members in a plate loosening direction.

REFERENCES:
patent: 3151553 (1964-10-01), Norton
patent: 3752075 (1973-08-01), Fusco
patent: 4010685 (1977-03-01), Trageser
patent: 4739704 (1988-04-01), Kitai
patent: 4785736 (1988-11-01), Jeschke
patent: 4848229 (1989-07-01), Grosshauser et al.

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