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Primary Examiner: Schroeder, Werner H.
Assistant Examiner: Falik, Andrew M.
Attorney:

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Title: Xerographic machine with infinitely variable developer bias

Abstract: A reproduction machine for producing copies incorporating a control for varying, infinitely over a given range copy shading. The control operates to change the fixed bias potential applied to the magnetic brush type developing rolls by providing through a variable voltage circuit, varying biasing potentials.

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Inventors: Kulbida, Ihor (Fairport, NY, US)
Burkett, Robert A. (Fairport, NY, US)
Meagher, Thomas (Webster, NY, US)

Application Number: 829023
Filing Date: 1977-08-30
Publication_date: 1979-04-17
Assignee: Xerox Corporation (Stamford, CT)
Primary Class(es): 399/138
Other Classes:
US Patent Ref:

2956487	Oct, 1960	Gialm, Jr.	118/647.
3262806	Jul, 1966	Gourge	118/657.
3674532	Jul, 1972	Morse	118/647.
3805739	Apr, 1974	Feldeisen et al.	118/657.
3850662	Nov, 1974	Jahn	118/647.
3866564	Feb, 1975	Wilson	118/657.
3893415	Jul, 1975	Ashton et al.	118/651.
3950089	Apr, 1976	Fraser et al.	118/658.
3990394	Nov, 1976	Katakura	118/658.
4003650	Jan, 1977	Courtney et al.	118/647.
4045217	Aug, 1977	Fujimura et al.	118/647.

Other Refs: Other References: IBM Technical Disclosure Bulletin, Schaffert "Development of Electrostatic Images", vol. 1, No. 3, Oct. 1958, p. 6.