Transfer charge control system

Details Transfer charge control system Transfer charge control system

1975-08-26

1978-03-07

Hix, L. T.

Photocopying

Including fiber optics

G03G 1516

Patent

active

040777090

ABSTRACT:
In an electrostatographic copier in which imaging material is transferred from an image support surface to an overlying copy sheet in a transfer station, by electrical transfer charges, the variable leakage conduction of these transfer charges by the copy sheet away from the transfer area (to contacting conductive members) changes the available transfer field strength, thus affecting transfer efficiency and quality. Here the conductive members contacting the copy sheet while it is in the transfer station are electrically isolated from ground and connected to feed back the sheet leakage currents to circuitry providing a compensatory change in the applied transfer charges.

REFERENCES:
patent: 3769506 (1973-10-01), Silverberg
patent: 3850519 (1974-11-01), Weikel
patent: 3909614 (1975-09-01), Marshall
patent: 3950680 (1976-04-01), Michaels et al.
Ernst; "Dark Voltage Control System"; IBM Tech. Disclosure Bull., vol. 17, No. 5, p. 1408; Oct. 1974.

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