Electro-photographic method and element

Details Electro-photographic method and element Electro-photographic method and element

1972-11-22

1976-03-02

Martin, Jr., Roland E.

Gas separation: apparatus

Magnetic separating means

96 1R, 96 15, 96 1LY, 96 18, 427 14, 427 15, 427 19, 355 3R, G03G 504, G03G 1322

Patent

active

039415937

ABSTRACT:
An electro-photographic method and apparatus in which the photo-conductive material is on an optically transparent base, the voltage at each position on the photo-conductive material or on small areas of conductive material associated therewith being depended on the amount of light impinging on the photo-conductive layer through the transparent base and on a potential set up between an electrically conductive layer located between the base and the photo-conductive layer and on an element located on the other side of the photo-conductive layer, pigment being accepted in an amount depending on the variable voltage.

REFERENCES:
patent: 2599542 (1952-06-01), Carlson
patent: 2917385 (1959-12-01), Byrne
patent: 3005707 (1961-10-01), Kallmann et al.
patent: 3013890 (1961-12-01), Bixby
patent: 3084043 (1963-04-01), Gundlach
patent: 3281857 (1966-10-01), Kaiser
patent: 3288605 (1966-11-01), Macklem
patent: 3346475 (1967-10-01), Matkan et al.
patent: 3409899 (1968-11-01), Cowan et al.
patent: 3594159 (1971-07-01), Kaufman
patent: 3737311 (1973-06-01), Wells

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