Charging apparatus and image forming apparatus

Details Charging apparatus and image forming apparatus Charging apparatus and image forming apparatus

2006-10-31

2006-10-31

Brase, Sandra L. (Department: 2852)

Electrophotography

Image formation

Charging

Reexamination Certificate

active

07130565

ABSTRACT:
A charging apparatus includes first and second magnetic particle carrying members. The second member is upstream of the first member in a particle feeding direction at a nip between the first member and a member to be charged. The particles are commonly used by the first and second members, which move in the same peripheral direction relative to the member to be charged such that the peripheral movement directions of the first and second members are opposite to a peripheral movement direction of the member to be charged at a portion where they are opposed to the member to be charged. The amount of the particles on the second member at a nip between the second member and the member to be charged is larger than the amount of particles on the first member at a nip between the first member and the member to be charged.

REFERENCES:
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patent: 5576812 (1996-11-01), Hibino et al.
patent: 6292640 (2001-09-01), Suzuki
patent: 6330411 (2001-12-01), Suzuki
patent: 6792232 (2004-09-01), Suzuki et al.
patent: 06-161211 (1994-06-01), None
patent: 9-325564 (1997-12-01), None

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