Electrophotographic apparatus

Details Electrophotographic apparatus Electrophotographic apparatus

1995-03-08

1996-09-17

Grimley, Arthur T.

Photocopying

Contact printing

Light boxes

347140, 355251, G03G 500, G03G 1504, G03G 15056

Patent

active

055573711

ABSTRACT:
An electrophotographic apparatus has a plurality of developing rollers arranged in a row in the direction of rotation of a photosensitive member so as to face the surface of the photosensitive member. Each developing roller retains on the surface thereof a developer consisting essentially of an electrically insulating magnetic toner and an electrically conductive magnetic carrier. At least the surface portion of each developing roller is driven to rotate in order to transport the developer to the surface of the photosensitive member. A developing bias voltage is applied to each of the developing rollers. Exposure is carried out by applying image light from the reverse side of the photosensitive member toward the most downstream developing roller as viewed in the direction of rotation of the photosensitive member.

REFERENCES:
patent: 3924945 (1975-12-01), Weigl
patent: 5159389 (1992-10-01), Minami et al.
patent: 5424811 (1995-06-01), Haneda
patent: 5432033 (1995-07-01), Asanae et al.

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