Contact charger and image forming apparatus

Details Contact charger and image forming apparatus Contact charger and image forming apparatus

2006-02-14

2006-02-14

Chen, Sophia S. (Department: 2852)

Electrophotography

Image formation

Charging

C361S221000

Reexamination Certificate

active

06999699

ABSTRACT:
A contact charger for charging a charging target (e.g., a photosensitive member) includes a brush to be in contact with the charging target, and auxiliary charging particles to be interposed between the brush and the charging target. Fibers of the brush have a volume resistivity from 1×101Ω·cm to 1×108Ω·cm, a primary particle diameter of the auxiliary charging particles is in a range from 0.01 μm to 10 μm, and a push-in amount of the brush with respect to the charging target is in a range from 0.1 mm to 2.0 mm. The brush moves relatively to the charging target for charging the charging target. An image forming apparatus includes a photosensitive member to be charged by the charger.

REFERENCES:
patent: 5508788 (1996-04-01), Watanabe et al.
patent: 6081681 (2000-06-01), Nagase et al.
patent: 6289190 (2001-09-01), Amamiya et al.
patent: 6366751 (2002-04-01), Shakuto et al.
patent: 2001/0026695 (2001-10-01), Uno
patent: 2002/0021917 (2002-02-01), Ishiyama et al.
patent: 10-307458 (1998-11-01), None

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