Title: Apparatus for forming a uniform liquid film on a roller

Abstract: Liquid is applied onto the circumference of a transfer roller by an applicator and thereby onto the circumference of an operating roller. The coefficients of friction in the apparatus are selected so that the transfer roller will be rotated by the operating roller to pick up liquid from the applicator when the thickness of the liquid on the transfer roller is below a selected value, and the transfer roller is prevented from rotating by the applicator when the thickness of the liquid slightly exceeds the selected value so that a uniform liquid film is applied onto the circumference of the operating roller.

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Inventors: Okamoto, Toyoo (Tokyo, JP)
Suzuki, Takashi (Tokyo, JP)
Maruta, Keiichi (Tokyo, JP)

Application Number: 742730
Filing Date: 1976-11-17
Publication_date: 1979-04-17
Assignee: Kabushiki Kaisha Ricoh (Tokyo, JP)
Primary Class(es): 118/60 399/325, 432/60
Other Classes:
US Patent Ref:

1080959	Dec, 1913	Eaton	118/261.
2337747	Dec, 1943	Grobecker	118/249.
2482636	Sep, 1949	Peterson et al.	118/262.
2770215	Nov, 1956	Knight	118/260.
3227080	Jan, 1966	Hill	118/260.
3268351	Aug, 1966	Van Dorn	118/60.
3291466	Dec, 1966	Aser et al.	432/228.
3331592	Jul, 1967	Cassano et al.	432/60.
3718116	Feb, 1973	Thettu	118/60.
3796183	Mar, 1974	Thettu	118/70.
3809854	May, 1974	Sanders	432/60.
3883291	May, 1975	Cloutier et al.	118/60.

Other Refs:
Primary Examiner: McIntosh, John
Assistant Examiner:
Attorney: Jordan; Frank J.