Image forming apparatus having density sensor for developer...

Details Image forming apparatus having density sensor for developer... Image forming apparatus having density sensor for developer...

2011-08-23

2011-08-23

Beatty, Robert (Department: 2852)

Electrophotography

Control of electrophotography process

Control of developing

Reexamination Certificate

active

08005386

ABSTRACT:
In an image forming apparatus having a toner density sensor which emits light to a developer carried on a developing sleeve and which detects developer density by a reflection output value from the developer, when a reflection output value when the developer is initially set with respect to the illumination light of the toner density sensor is defined as A and a reflection output value of a region of at least the developing sleeve which is opposed to the toner density sensor when the developer is not carried on the developing sleeve is defined as B, a value of B/A is in a range of 0.3<B/A<2.

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