Clamping device for a printing plate of an offset printing machi

Details Clamping device for a printing plate of an offset printing machi Clamping device for a printing plate of an offset printing machi

1985-03-15

1987-08-25

Burr, Edgar S.

Printing

Flexible-sheet-securing devices

101378, 101383, 101407A, 4034081, B41F 128

Patent

active

046884831

ABSTRACT:
A clamping device for a printing plate mountable on a plate cylinder of an offset printing machine and having perforations formed at leading and trailing edges thereof, as viewed in direction of sheet travel through the machine, the clamping device includes clamping bars formed with hooks respectively engageable in the perforations formed in the printing plates, the clamping bars being disposed in a channel formed in the plate cylinder, one of the clamping bars being pivotable about a pivot point diagonally to a longitudinal direction of the plate cylinder, the pivot point being located in the cylinder channel substantially on a center line of the cylinder extending transversely to the longitudinal direction thereof, and adjusting means mounted in the cylinder channel for moving another one of the clamping bars in the longitudinal direction of the cylinder, the other clamping bar having additional degrees of freedom of movement accommodating an accompanying diagonal movement which respect to the longitudinal direction of the cylinder and a clamping movement in circumferential direction of the cylinder.

REFERENCES:
patent: 2737887 (1956-03-01), Gericke
patent: 3112698 (1963-12-01), Lake
patent: 3168040 (1965-02-01), Norton
patent: 4459913 (1984-07-01), Kowalik

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