Scoring or perforating bar for offset presses

Details Scoring or perforating bar for offset presses Scoring or perforating bar for offset presses

1991-05-14

1992-06-23

Burr, Edgar S.

Printing

Rolling contact machines

Rotary

101224, B41F 1354

Patent

active

051233479

ABSTRACT:
A score or perforator bar device is adapted for use with certain printing presses having a blanket cylinder revolving upon an axle shaft and with an elongate slot for attachment of the blanket. The adapter device includes a bar of a length substantially the same as the cylinder with a working side having a longitudinal slot for mounting a knife blade. The knife blade has either a scoring edge or a perforation edge, depending upon the desired effect. The bar has an attachment side for connection to the blanket cylinder and has legs extending generally perpendicularly. The legs have recessed ends for bearing against the cylinder shaft so that the force of the blade is transferred to the axle shaft and not to the cylinder shell. A screw arrangement retains the bar in a cylinder slot.

REFERENCES:
patent: 753061 (1904-02-01), Gates
patent: 2007544 (1935-07-01), Meisel
patent: 2469526 (1949-05-01), Sloat
patent: 2832411 (1958-04-01), Richards et al.
patent: 2842202 (1958-07-01), Boyd
patent: 3554070 (1971-01-01), Boyd
patent: 4596546 (1986-06-01), Schellenberg
patent: 4767159 (1987-06-01), Nawrath
patent: 4936214 (1990-06-01), Overholser
patent: 4962686 (1990-10-01), Boyd et al.

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