Patent ID: 6011947
Filing Date: 2000-01-04
Classification: B05C,B65H,G03G

Abstract:
A device for automatically adjusting thickness of liquid on a metering roll, comprising:a transfer roll that mates with a back-up roll to form a nip when a sheet passes therethrough for wetting a side of the sheet;a metering roll positioned to form a nip with said transfer roll;a liquid filled sump, said metering roll including a portion thereof positioned within said liquid filled sump for adding liquid to an outer surface thereof;an optical sensor positioned to detect a type of reflected light from the liquid on said outer surface of said metering roll and send a signal indicative of the same;a stepper motor connected to said metering roll to adjust said metering roll position in either of two directions; anda controller that receives said signal from said sensor and in turn actuates said stepper motor to adjust a said metering roll in one of said two directions.