Arrangement in printing machines having a varnishing unit for va

Details Arrangement in printing machines having a varnishing unit for va Arrangement in printing machines having a varnishing unit for va

1984-04-02

1985-05-14

Lusignan, Michael R.

Coating processes

Measuring, testing, or indicating

101184, 118663, B41F 516, B41F 518

Patent

active

045172218

ABSTRACT:
In response to a stop command such as a printing disturbance signal, the transfer of varnish to the varnish applicator roller is shut off but the feeding of sheets through the varnishing unit is not immediately shut off; rather, a few remaining sheets are thereafter fed through the varnishing unit before the varnish applicator roller is thrown off from the cooperating cylinder and the machine drive is shut off. The few remaining sheets remove the residual varnish from the varnish applicator roller so that when printing is resumed the newly printed sheets do not stick to the varnish applicator roller or the cooperating cylinder. In a preferred embodiment a preselection counter, clocked by sheet feed cycles, determines the number of remaining sheets.

REFERENCES:
patent: 3473468 (1969-10-01), Vandeman et al.
patent: 4423677 (1984-01-01), Fischer

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