Clamping device for flexible printing plates

Details Clamping device for flexible printing plates Clamping device for flexible printing plates

1976-06-03

1978-08-08

Pieprz, William

Printing

Flexible-sheet-securing devices

B41F 2712

Patent

active

041049683

ABSTRACT:
A device for clamping flexible printing plates onto the plate cylinder of rotary printing presses, wherein the plate cylinder has a concentric groove formed in its surface, the groove walls extending at an acute angle into the surface of the plate cylinder to define a pair of hook-like edges at the groove opening for receiving the correspondingly hook-like bent ends of the printing plate. A spindle is pivotably disposed in the groove having an axis concentric with the groove. At least one flange spring is supported on a first side of the spindle which faces a first hook-like wall edge. A clamping element is formed at one the end of the spring for engaging the front end of the printing plate against one of the hook-like groove edges. A bar disposed on the opposite side of the spindle axis and mounted to the spindle, the bar extending into the plate cylinder surface for receiving the hook-like bent rear end of the printing plate. The bar is directed toward the printing plate front end, so that when the spindle is pivoted on its axis, the extending end of the bar will engage the clamping element and urge it against the first hook-like edge of the groove to secure both ends of the printing plate.

REFERENCES:
patent: 2309161 (1943-01-01), Breman et al.
patent: 3410211 (1968-11-01), Grunig
patent: 3626848 (1971-12-01), Tafel
patent: 3757691 (1973-09-01), Etchell

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