Developing device capable of preventing toner inside...

Details Developing device capable of preventing toner inside... Developing device capable of preventing toner inside...

2005-08-02

2005-08-02

Grainger, Quana (Department: 2852)

Electrophotography

Having particular structure

Modular or displaceable

C399S256000

Reexamination Certificate

active

06925274

ABSTRACT:
A developing device31includes three shielding members20that divide an inner space of the developing device31into a developing chamber23and toner hopper chambers21. The shielding members20in predetermined conditions prevent toner inside the developing chamber23from entering the toner hopper chambers21. When toner empty condition of the developing chamber23is detected, the shielding member20ais driven to rotate so as to supply toner22ainto the developing chamber23. When the toner empty condition is detected for the second time, then the shielding members20a, 20bare driven to rotate for supplying toner22bto the developing chamber23. In this manner toner can be supplied to the developing chamber23without allowing the toner returning to the toner hopper chambers21.

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