Anti-wrap for high speed printing press

Details Anti-wrap for high speed printing press Anti-wrap for high speed printing press

1990-02-16

1991-11-12

Burr, Edgar S.

Printing

Processes

Condition responsive

101226, 101224, 226 11, 83371, B41F 16, B41F 1360

Patent

active

050638459

ABSTRACT:
An anti-wrap apparatus and method for high speed printing press involves detecting the start of web wrap after web break to deactivate the press motors and apply the press brakes. In addition the detection mechanism which senses a change in the web path, can sever the already printed web being drawn backwards by the start of web wrap, to limit the availability of web material, for web wrap. In the case of difficult to sever web materials, severing action can be enhanced by forcing the web being drawn backwards, against the severing detection mechanism.

REFERENCES:
patent: 3404627 (1968-10-01), Halley
patent: 3638568 (1972-02-01), Granger
patent: 3881383 (1975-05-01), Alverth et al.
patent: 4549485 (1985-10-01), Nawrath
patent: 4887532 (1989-12-01), Kotterer
patent: 4966074 (1990-10-01), Aldrich, Jr.

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