Apparatus and method for sensing water film thickness on conditi

Details Apparatus and method for sensing water film thickness on conditi Apparatus and method for sensing water film thickness on conditi

1997-09-29

1998-11-03

Grimley, Arthur T.

Electrophotography

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399325, 430 97, G03G 1520

Patent

active

058323597

ABSTRACT:
A device and method for measuring the thickness of liquid on an adjustable metering roll. The device comprising a transfer roll that mates with a back-up roll to form a nip through which a sheet passes for wetting a side of the sheet. An adjustable metering roll mates with the transfer roll and has a portion thereof positioned in a liquid filled sump for liquid to be added to an outside surface thereof. An optical sensor is positioned to detect the type of reflected light from the liquid on the outside surface of the metering roll and give off a Go/No Go signal when indicating contact between the metering roll and the transfer roll. The correct liquid thickness is obtained on the surface of the metering roll by further adjsutment of the metering roll.

REFERENCES:
patent: 4254732 (1981-03-01), Moser
patent: 4652110 (1987-03-01), Sato et al.
patent: 5185644 (1993-02-01), Shimoyama et al.
patent: 5264899 (1993-11-01), Mandel
patent: 5434029 (1995-07-01), Moser

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