Developing device containing for storing developer having zoner

Details Developing device containing for storing developer having zoner Developing device containing for storing developer having zoner

1994-03-09

1996-11-05

Dang, Thu Anh

Electrophotography

Image formation

Development

G03G 1508

Patent

active

055723004

ABSTRACT:
The present invention provides in a preferred embodiment a developer container having a supply and discharge shaft which is driven and rotated in a direction by a supply and discharge shaft motor, a supply screw mounted on one of the ends of the supply and discharge shaft for bringing unused developer in a developer supply container into a developer container, and a discharge screw mounted on the other end of the supply and discharge shaft for discharging the developer in the developer container through a developer discharge opening. With this structure, the ratio of replacing old developer with new developer in the developer container is controlled in the desired manner, and the charging property of the developer is maintained substantially uniform. Additionally, since the replacement efficiency of the developer is improved, the consumption of the developer is reduced. Moreover, even when a copying machine is tilted, a large amount of developer is unlikely to be discharged.

REFERENCES:
patent: 4625895 (1986-12-01), Tsukano
patent: 4768055 (1988-08-01), Takamatsu et al.
patent: 4825244 (1989-04-01), Hediger
patent: 4873549 (1989-10-01), Tada et al.
patent: 5095338 (1992-03-01), Hayes, Jr. et al.
patent: 5109254 (1992-04-01), Oka et al.
patent: 5237373 (1993-08-01), Aimoto et al.
patent: 5430532 (1995-07-01), Ueda et al.
patent: 5450178 (1995-09-01), Kawashima et al.

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