Image forming apparatus and process cartridge for use therewith

Details Image forming apparatus and process cartridge for use therewith Image forming apparatus and process cartridge for use therewith

2005-11-04

2008-03-04

Chen, Sophia S. (Department: 2852)

Electrophotography

Image formation

Development

C430S109300, C430S109400, C430S110400, C430S111350, C430S123410

Reexamination Certificate

active

07340202

ABSTRACT:
An image forming apparatus and process cartridge that achieves extended operating life of a two-component developer without generating such problems as toner scattering, etc. either in the initial period or over time. The gap between the image support member and the developer support member is set to 0.3±0.1 mm. A substance having a resin cover layer on the surface of a core material is used as the carrier. The resin cover layer provides a conductive covering layer having a tin dioxide layer on the surface of base particles and an indium oxide layer, and contains conductive particles formed such that the oil adsorption is 10 to 300 mL/100 g. A substance that provides a bonding resin including a hybrid resin having vinyl polymers and polyester polymers is used as the toner. The amount of hybrid resin contained in relation to the amount of releasing agent is set to the range of 0.5 to 3.

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U.S. Appl. No. 11/608,521, filed Dec. 8, 2006, Satoru et al.

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