Printing plate lock-up apparatus for plate cylinder

Details Printing plate lock-up apparatus for plate cylinder Printing plate lock-up apparatus for plate cylinder

1994-08-03

1995-10-03

Burr, Edgar S.

Printing

Flexible-sheet-securing devices

101378, 1013821, B41F 2706

Patent

active

054543169

ABSTRACT:
A printing plate lock-up apparatus for a plate cylinder in a printing press comprises a groove defined in the plate cylinder and having an essentially circular cross section, the groove having an opening end opening to the outer periphery of the plate cylinder and having a width in the circumferential direction smaller than the internal diameter, the opening end having one edge engageable with a turned back edge of the printing plate, an engaging member disposed along the groove and having mating surfaces slidably contacting with the inner periphery of the groove for permitting rotation of the engaging member relative to the groove, the engaging member having an engaging hook engageable with a turned back edge, and having a thickness permitting withdrawal and installation through the opening end, and an operation assembly cooperating with the engaging member for operating the latter to rotate within the groove, the operation assembly maintaining an angular phase of the engaging means at least in the position where the engaging hook of the engaging member hooks the trailing end side turned back edge.

REFERENCES:
patent: 2157621 (1939-05-01), Neilson
patent: 4104968 (1978-08-01), Schwaab et al.
patent: 4702166 (1987-10-01), Depa
patent: 5267512 (1993-12-01), Miyoshi et al.

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