Developing unit for electrophotography

Details Developing unit for electrophotography Developing unit for electrophotography

1976-01-28

1976-09-14

Jaudon, Henry S.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

With electromagnetic and/or electrostatic removal of...

355 10, 118DIG23, G03G 1310

Patent

active

039800490

ABSTRACT:
A developing unit for use with electrophotographic copying apparatus which uses a developing electrode for preventing unfavorable results such as edge effect, missing of fine lines, etc. A pair of conductor plates are maintained one behind the other and face a photosensitive surface of a photoreceptor carrying an electrostatic latent image, the conductor plate remote from the surface being connected to the ground directly or through a constant voltage source, with respective portions of the developer used filling the spaces between the plates and photoreceptor which may constitute a voltage divider, thus maintaining the function of the divider irrespective of variations in the resistances of such filling fractions of the developer with aging, environmental factors, etc. thus obtained potential on the other conductor plate provides a stable index of the potential to be applied to the developing electrode. The latter conductor plate itself may be consistent with the developing electrode.

REFERENCES:
patent: 3752119 (1973-08-01), Matkan
patent: 3782818 (1974-01-01), Smith
patent: 3807997 (1974-04-01), Cade et al.
patent: 3892481 (1975-07-01), Schaefer et al.
patent: 3932034 (1976-01-01), Takahashi

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