Coating apparatus – With printing
Patent
1981-12-08
1983-02-08
Lawrence, Evan K.
Coating apparatus
With printing
118222, 118262, B05C 116
Patent
active
043722440
ABSTRACT:
A varnishing unit for applying varnish in a strip of selected width on a sheet carried on the impression cylinder of a printing press distinguished by use of a plurality of adjustable varnish blocking rollers arranged adjacent a fountain roller between a varnish trough and a metering nip formed between a metering roller and the fountain roller. The blocking rollers are hard surfaced and of relatively small diameter, and are secured to the frame by arms located at the respective ends of each roller. Each blocking roller is individually adjustable between (a) a position in which it forcibly indents the surface of the fountain roller so as to substantially cut off the flow of varnish to the metering nip, in the region of width controlled by the blocking roller and (b) a position withdrawn from the surface of the fountain roller to permit passage of a strip of varnish in the controlled region to the metering nip and thence via intermediate rollers to the varnishing cylinder. The arms can be differentially adjusted so that the flow of varnish may be blocked off at one end of the roller but not at the other to achieve a varnish strip of a width which is less than the length of the blocking roller. Furthermore, the arms on which the blocking rollers are mounted are slidable on a cross beam which extends parallel to the fountain roller to permit adjustment of the position of the region controlled by the blocking roller.
REFERENCES:
patent: 3552311 (1971-01-01), Petri
patent: 3789795 (1974-02-01), Brandenburg
patent: 4270483 (1981-06-01), Butler et al.
Lawrence Evan K.
M.A.N.--Roland Druckmaschinen Aktiengesellschaft
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