Electrophotographic process

Details Electrophotographic process Electrophotographic process

1973-06-04

1977-11-29

Kimlin, Edward C.

Gas separation: apparatus

Magnetic separating means

96 15D, 252 621P, G03G 508

Patent

active

040604152

ABSTRACT:
Electrophotographic copies having images of high optical density formed on photoconductive layers having little weight and suitably transparent for use as photocopying originals are produced by charging electrostatically and exposing imagewise a photoconductive layer of less than 10 g/m.sup.2 in dry weight and less than 6 microns in thickness which contains zinc oxide and a binder in a weight proportion of between 9 and 14 and is chargeable at most to a surface potential of between 100 and 250 V, this layer being carried on a conductive flexible support having a specific resistance of less than 10.sup.13 ohm. cm, and thereafter developing the resulting charge pattern by contacting it during at most 3 seconds with a "one-component" powder which contains pigment dispersed in resin and has a specific resistance below 10.sup.7 ohm. cm, while maintaining a conductive connection between the developing powder and said support.

REFERENCES:
patent: 2788288 (1957-08-01), Rheinfrank et al.
patent: 3278439 (1966-10-01), Blanchett et al.
patent: 3391082 (1968-07-01), Maclay
patent: 3565805 (1971-02-01), Jones et al.
patent: 3650797 (1972-03-01), Tomanek
patent: 3681106 (1972-08-01), Burns et al.
patent: 3725061 (1973-04-01), Verhille et al.
patent: 3776724 (1973-12-01), Usmani
patent: 3799911 (1974-03-01), Dissen et al.

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