Toner replenishing device for an image forming apparatus

Details Toner replenishing device for an image forming apparatus Toner replenishing device for an image forming apparatus

1996-10-03

1998-07-21

Brase, Sandra L.

Electrophotography

Control of electrophotography process

Control of developing

399 61, 399258, 399263, G03G 1510

Patent

active

057846693

ABSTRACT:
In an image forming apparatus using dry toner, a toner replenishing device includes cleaning means for cleaning the sensing surface of remaining toner sensing means. The cleaning means is driven by the same drive source as agitating means for agitating the toner. To clean the sensing surface, the cleaning means is driven in a particular manner different from a manner for usual toner replenishment. While the cleaning means cleans the sensing surface, the output signal of the remaining toner sensing means is detected. The device achieves highly accurate toner concentration control and toner end detection at the same time.

REFERENCES:
patent: 4963929 (1990-10-01), Ueda et al.
patent: 4967691 (1990-11-01), Chikama et al.
patent: 5005516 (1991-04-01), Speer
patent: 5124752 (1992-06-01), Kanno et al.
patent: 5172168 (1992-12-01), Satoh et al.
patent: 5227842 (1993-07-01), Hayashi et al.
patent: 5298952 (1994-03-01), Kamijo et al.
patent: 5557379 (1996-09-01), Nakamura et al.

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