Developer device, image forming apparatus, and toner...

Details Developer device, image forming apparatus, and toner... Developer device, image forming apparatus, and toner...

2011-08-09

2011-08-09

Chen, Sophia S (Department: 2852)

Electrophotography

Diagnostics

Consumable

C399S058000

Reexamination Certificate

active

07995935

ABSTRACT:
A differential sensitivity calculation portion calculates the differential sensitivity D of a toner concentration sensor, using an output voltage V1and V2of the toner concentration sensor when a toner chamber is in a state of toner concentration T1and T2at the time of initial operation of a printer, or at some other time. A toner replenishment control portion takes as input a current output voltage Vs output from the toner concentration sensor, calculates the toner concentration in the toner chamber using the output voltage Vs and the differential sensitivity D calculated by the differential sensitivity calculation portion, and outputs a control signal to a toner replenishment motor so as to maintain the toner concentration in the toner chamber at an appropriate concentration.

REFERENCES:
patent: 5311261 (1994-05-01), Nakagama et al.
patent: 5649266 (1997-07-01), Rushing
patent: 7177557 (2007-02-01), Kreckel
patent: 7603046 (2009-10-01), Hirayama
patent: 2009/0080913 (2009-03-01), Suzuki
patent: 5-107924 (1993-04-01), None
patent: 7-271174 (1995-10-01), None
patent: 2008-276118 (2008-11-01), None

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