Electrophotographic process

Details Electrophotographic process Electrophotographic process

1980-07-24

1982-05-11

Lawrence, Evan K.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

118651, 118657, 118658, 430122, 430126, G03G 1309, G03G 1316, G03G 1322

Patent

active

043294146

ABSTRACT:
An electrophotographic duplicating process suitable for high humidity conditions utilizes a magnetic brush developing device having an electrically conductive development electrode with an electrically insulating coating thereon in conjunction with a developer. The developer consists of toners with a volume resistivity higher than 10.sup.13 .OMEGA..multidot.cm. and magnetic carriers with a volume resistivity of about 10.sup.5 to 10.sup.8 .OMEGA..multidot.cm and has a toner concentration varying from about 7% to about 13% by weight. Once formed, an electrostatic charge latent image is repeatedly developed and transferred to an image receiving member to form at least twenty duplicated copies.

REFERENCES:
patent: 3355289 (1967-11-01), Hall et al.
patent: 3592166 (1971-07-01), Wu
patent: 3627523 (1971-12-01), Shelffo
patent: 3950089 (1976-04-01), Fraser et al.
patent: 3996892 (1976-12-01), Parker et al.
patent: 4076857 (1978-02-01), Kasper et al.
patent: 4081571 (1978-03-01), Nushihama et al.
Hawley, G. G., The Condensed Chemical Dictionary, New York, Van Nostrand Reinhold Co., 1977, p. 699.

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