Image forming apparatus having charger to charge image carrier w

Details Image forming apparatus having charger to charge image carrier w Image forming apparatus having charger to charge image carrier w

1993-10-12

1995-01-10

Moses, R. L.

Photocopying

Contact printing

Light boxes

361225, G03B 1502

Patent

active

053812158

ABSTRACT:
A device for charging a photoreceptor on which a toner image is formed, comprises a rotatable sleeve, at least two magnets disposed in the sleeve so as to attract magnetic particles in a form of magnetic brush, and a electric power source to provide the photoreceptor with an electric charge through the magnetic brush. One of the magnets is disposed upstream of the closest point between the photoreceptor and the sleeve, and the other magnet is disposed downstream of the closest point.

REFERENCES:
patent: 4174903 (1979-11-01), Snelling
patent: 4706320 (1987-11-01), Swift
patent: 5060016 (1991-10-01), Wanou et al.
patent: 5225878 (1993-07-01), Asano et al.
patent: 5287146 (1994-02-01), Uno et al.
Journal of Applied Physics, vol. 62, No. 7, Oct. 1, 1987, pp. 2665-2668, Tetsutani and Hoshino, "New Photoreceptor Charging Method by Rubbing with Magnetic Conductive Particles", New York, U.S.A.

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