Apparatus for preventing wire strobing in a hybrid scavengeless

Details Apparatus for preventing wire strobing in a hybrid scavengeless Apparatus for preventing wire strobing in a hybrid scavengeless

1998-07-13

1999-11-02

Braun, Fred L.

Electrophotography

Image formation

Development

399291, G03G 1508

Patent

active

059786337

ABSTRACT:
A developer unit for developing a latent image recorded on an image receiving member with marking particles, to form a developed image, including an image receiving member moving at a predetermined process speed. A donor member is spaced from the image receiving member and adapted to transport marking particles to a development zone adjacent the image receiving member. An electrode is positioned in the development zone between the image receiving member and the donor member. A voltage supply to electrically bias the electrode during a developing operation with an alternating current, to detach marking particles from the donor member, forming a cloud of marking particles in the development zone, and developing the latent image with marking particles from the cloud. A modulator, responsive to the predetermined process speed, controls a modulation rate of the voltage supply to minimize harmonic resonant vibrations of the electrode.

REFERENCES:
patent: 5010367 (1991-04-01), Hays
patent: 5144370 (1992-09-01), Bares
patent: 5144371 (1992-09-01), Hays
patent: 5404208 (1995-04-01), Edmunds

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