Electrostatic charging apparatus having conductive particles wit

Details Electrostatic charging apparatus having conductive particles wit Electrostatic charging apparatus having conductive particles wit

1997-04-29

1999-07-27

Grimley, Arthur T.

Electrophotography

Image formation

Charging

399174, G03G 1502

Patent

active

059305665

ABSTRACT:
A charging apparatus is disclosed which has an object member and a charging member. The charging member has magnetic particles, provided in contact with the object member and capable of electrostatically charging the object member upon application of a voltage. The surfaces of the magnetic particles are formed of a composite which includes conductive particles and a binder resin, and the conductive particles are in a proportion of from 80% by weight to 99% by weight in total weight based on the weight of the composite. The conductive particles have a size distribution having at least two peaks or shoulders. Also, an electrophotographic apparatus having the charging member is disclosed.

REFERENCES:
patent: 5158852 (1992-10-01), Sakata et al.
patent: 5606401 (1997-02-01), Yano
patent: 5659852 (1997-08-01), Chigono et al.

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