Developing apparatus including first and second developer...

Details Developing apparatus including first and second developer... Developing apparatus including first and second developer...

2006-05-02

2006-05-02

Chen, Sophia S. (Department: 2852)

Electrophotography

Image formation

Development

C399S258000

Reexamination Certificate

active

07039344

ABSTRACT:
A two-component developing apparatus is provided with a developer carrying member for carrying the developer thereon to an image bearing member. An agitating chamber is provided with a screw member provided with fins on the rotary shaft thereof for agitating and carrying the developer, and a receiving port for receiving a supplied toner therein, and constituting a circulation route for the developer together with the developing chamber, more fins are provided in a second area spaced apart by a predetermined distance and more from the receiving port toward the downstream side thereof with respect to a developer carrying direction than in a first area near the receiving port.

REFERENCES:
patent: 4942431 (1990-07-01), Tada
patent: 5005517 (1991-04-01), Fukui et al.
patent: 5887224 (1999-03-01), Mizuishi et al.
patent: 6281961 (2001-08-01), Sako et al.
patent: 2004/0086301 (2004-05-01), Tamura

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