Toner residual amount detection apparatus

Details Toner residual amount detection apparatus Toner residual amount detection apparatus

2006-06-20

2006-06-20

Ngo, Hoang (Department: 2852)

Electrophotography

Diagnostics

Consumable

C399S049000, C399S030000

Reexamination Certificate

active

07065306

ABSTRACT:
In order to prevent a toner residual amount from being erroneously judged as “toner present” after the toner residual amount has been judged to be insufficient, a toner residual amount detection apparatus includes a developing device for developing an electrostatic image formed on an image bearing member by a toner, the developing device being provided for movement relative to an apparatus main body, a sensor for outputting information corresponding to the toner residual amount in the developing device, a judging device for comparing the output of the sensor with a reference value to thereby judge the toner residual amount, wherein image forming is inhibited via a predetermined number of times of image forming after the toner residual amount is judged to be not sufficient, and a changing device for changing the reference value to a smaller value with the judgement that the toner residual amount is not sufficient.

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