Developing device and image forming apparatus

Details Developing device and image forming apparatus Developing device and image forming apparatus

2006-01-10

2006-01-10

Ngo, Hoang (Department: 2852)

Electrophotography

Image formation

Development

C399S256000

Reexamination Certificate

active

06985685

ABSTRACT:
A developing device has a rotary developer carrier, a rotary developer supply and collection member, a first and second rotary developer stirring members for stirring the developer while conveying and circulating the developer between them in the direction opposite to each other and having the same developer conveyance power, and a third rotary developer stirring member having a zero conveyance power in the rotary axis direction, which are provided in a housing in parallel with each other in this order in the direction to leave a latent image carrier. A toner replenishment inlet is provided at an upper part where the second and third stirring members face each other, and on an upstream side of the second stirring member in the developer conveyance direction, and the second and third stirring members are rotated downwardly at the position where both developer stirring members face each other.

REFERENCES:
patent: 5722002 (1998-02-01), Kikuta et al.
patent: 6249664 (2001-06-01), Sato
patent: 6275674 (2001-08-01), Sugimoto
patent: 6766132 (2004-07-01), Sakai et al.

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