Image forming apparatus having sharp edged electrode

Details Image forming apparatus having sharp edged electrode Image forming apparatus having sharp edged electrode

1991-11-29

1993-10-05

Pendegrass, Joan H.

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355224, 361229, G03G 1502

Patent

active

052509923

ABSTRACT:
An image forming apparatus includes a discharger for discharging a surface of an photoreceptor, a shield case arranged opposite to the photoreceptor and having an opening opposite to the photoreceptor a corona wire electrode arranged in the shield case and connected to a high voltage power source, a charger arranged in the opening of the shield case and having a grid grounded through a constant potential element for charging the photoreceptor surface, and an electrode arranged opposite the photoreceptor between the discharger and the charger and having a sharp edge opposite the photoreceptor. The electrode is grounded through the constant potential element and generates an unbalanced electric field between the electrode and the photoreceptor, thereby discharging charges located on the photoreceptor surface and having a polarity different from that of the electrode.

REFERENCES:
patent: 3744898 (1973-07-01), Kurahashi et al.
patent: 4835571 (1989-05-01), Tagawa et al.

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