Plate lockup apparatus for printing press

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

1992-11-10

1994-03-22

Burr, Edgar S.

Printing

Flexible-sheet-securing devices

101378, B41F 128

Patent

active

052954358

ABSTRACT:
A plate lockup apparatus for a printing press includes a lockup table, a gripper plate, a cam shaft, a pin, and a compression coil spring. The lockup table is supported on a bottom surface of a gap in a circumferential surface of a cylinder to be movable forward/backward perpendicularly to the axis of the cylinder, and extends in the axial direction of the cylinder. The gripper plate is swingably and pivotally supported on the lockup table such that its gripper surface opposes the lockup table, and is constituted by a horizontal member extending in a circumferential direction of the cylinder and a vertical member extending in a radial direction of the cylinder to have a substantially L-shaped section. The cam shaft is disposed between the lockup table and the wall surface of the gap to be rotatable in the axial direction of the cylinder. The pin is moved forward/backward in accordance with rotation of the cam shaft to close the gripper surface by acting on the vertical member of the gripper plate when the pin moves forward/backward within a predetermined amount, and to move the lockup table in a direction opposite to the cam shaft by acting on the lockup table when the pin moves forward/backward exceeding a predetermined amount. The compression coil spring biases the lockup table toward the cam shaft.

REFERENCES:
patent: 3460443 (1969-08-01), Sarka et al.
patent: 5088410 (1992-02-01), Murakami
patent: 5168810 (1992-12-01), Kojima
patent: 5181469 (1993-01-01), Merkel et al.
patent: 5182994 (1993-02-01), Sugiyama
patent: 5199352 (1993-04-01), Sugiyama

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