Developing device with partition member of varying length

Details Developing device with partition member of varying length Developing device with partition member of varying length

1995-05-02

1997-03-18

Brase, Sandra L.

Electrophotography

Image formation

Development

399263, G03G 1506

Patent

active

056127707

ABSTRACT:
A partition wall for separating a developing chamber from a toner agitating chamber in an electrostatic developing device includes a high wall portion confronting a toner discharge opening of a toner cartridge, and low wall portions formed on either side of the high wall portion. Toner is discharged from the toner discharge opening of the toner cartridge into the agitating chamber. Toner is then sent over the partition wall and into the developing chamber by rotation of an agitator in the agitating chamber. Toner in the central portion of the agitating chamber goes over the high wall portion, and toner in the side portions of the agitating chamber goes over the low wall portions. Accordingly, a uniform amount of toner is supplied to all points along the length of a developing sleeve in the developing chamber, and hence to all points along the length of a photosensitive drum confronting the developing sleeve.

REFERENCES:
patent: 4864349 (1989-09-01), Ito
patent: 5075728 (1991-12-01), Kobayashi et al.
patent: 5103264 (1992-04-01), Bhagat
patent: 5103765 (1992-04-01), Owada et al.
patent: 5124751 (1992-06-01), Fukui et al.
patent: 5188057 (1993-02-01), Ishikawa et al.
patent: 5287148 (1994-02-01), Sakemi et al.
patent: 5325163 (1994-06-01), Nishio

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