Printing plate fastening and tensioning assembly

Details Printing plate fastening and tensioning assembly Printing plate fastening and tensioning assembly

1989-02-02

1990-01-16

Wiecking, David A.

Printing

Printing members

Plate mountings

101378, 1014151, B41F 2700

Patent

active

048935611

ABSTRACT:
A printing plate fastening and tensioning assembly for use with a plate cylinder of a rotary printing machine uses springs and magnets to provide holding forces. The springs bias fastening or tensioning bars away from walls of a groove formed in the peripheral surface of the plate cylinder. Magnetic forces provided by magnetic carried either by the plate cylinder or by these movable bars attract a portion of the bar to the groove wall. This alternative use of spring or magnetic forces effects either a fastening or tensioning of a selected end portion of a printing plate carried by the plate cylinder.

REFERENCES:
patent: 2730949 (1954-07-01), Mitchell
patent: 2999453 (1961-09-01), Roberts
patent: 3730092 (1973-05-01), Pickard et al.
patent: 3745626 (1973-07-01), Bray
patent: 3824927 (1974-07-01), Pugh et al.
patent: 4402265 (1983-09-01), Pickard
patent: 4596188 (1986-06-01), Bonomi
patent: 4598642 (1986-07-01), Sauer et al.
patent: 4620482 (1986-11-01), Fischer
patent: 4628815 (1986-12-01), Van Kanegan
patent: 4646639 (1987-03-01), Gollinger et al.

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