Method and apparatus for marking defective portions of a printed

Printing – Antismut device – Anti-offset material application

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101 2, 101181, B41F 342

Patent

active

047006277

ABSTRACT:
A printed web marker is used in combination with a multiroll printing press. A web marker is positioned downstream of the last of the rolls for marking defective portions of the printed web. A central controller operates the marker and the controller has off, delay and on control modes. The marker does not operate when in the off mode and marking commences upon expiration of a predetermined period when the controller is shifted from the off to the delay mode and continues thereafter and for a predetermined period after the controller is shifted from the delay to the off mode. Marking commences instantaneously upon the controller being shifted from the off to the on mode. Switches and operators cause the controller to be shifted between the modes so that only defective portions of the web are marked.

REFERENCES:
patent: 3289835 (1966-12-01), Dalin
patent: 3329087 (1967-07-01), Sandor et al.
patent: 3806075 (1974-04-01), Nachioff et al.
patent: 3955502 (1976-05-01), Hofe
patent: 3974766 (1976-08-01), Zimmer
patent: 4011975 (1977-03-01), Brown, Jr.
patent: 4067760 (1978-01-01), Nelson
patent: 4243925 (1981-01-01), Gnuechtel
patent: 4541335 (1985-09-01), Tonuno et al.
patent: 4541337 (1985-09-01), Schaul

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