Printing – Flexible-sheet-securing devices
Patent
1975-09-17
1976-08-10
Burr, Edgar S.
Printing
Flexible-sheet-securing devices
101378, B41F 2714
Patent
active
039734960
ABSTRACT:
This invention relates to an improved apparatus and method for locking printing plates to a support, e.g., saddle or cylinder, wherein the support includes a body portion having at least two anchoring means as an integral part thereof, at least one of the anchoring means being incorporated on a spring-mounted bar movable under spring tension to engage and lock printing plates to the support. The invention also relates to apparatus and method for mounting printing plates onto a support comprising an actuating assembly for the spring-mounted bar and which is adapted to move the spring-mounted bar between expanded and compressed positions for the mounting. The spring-mounted bar actuating assembly is mounted beneath the peripheral surface of the support and comprises a pivot arm pivotable at or near its midpoint about a pivot block which is mounted beneath the peripheral surface. The pivot arm, at one end, is connected through a strap to the spring-mounted bar at the midpoint position of the spring-mounted bar and, at the other end, protrudes from one side of the support and is adapted to receive an actuating means such as a cam assembly for actuating the spring-mounted bar. Additionally, printing plates with preshaped engaging means of a shape complementary to that of the anchoring means of lock-up device are provided.
REFERENCES:
patent: 2108822 (1938-02-01), Lippencott
patent: 2265005 (1941-12-01), Read
patent: 2801856 (1957-08-01), Medowar
patent: 3416447 (1968-12-01), Pozniak
patent: 3470817 (1969-10-01), Heimlicker et al.
patent: 3603255 (1971-09-01), Horner
patent: 3696744 (1972-10-01), Etchell
patent: 3750572 (1973-08-01), Etchell et al.
patent: 3766857 (1973-10-01), Schlatter
patent: 3771449 (1973-11-01), Hill
patent: 3791295 (1974-02-01), Albright
Cannon Robert W.
Cerny Daryl D.
Okeley, II Robert E.
Sannella Joseph L.
Ball Corporation
Burr Edgar S.
Haynes James D.
Pieprz William
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