Electrophotographic image forming apparatus and a developing uni

Details Electrophotographic image forming apparatus and a developing uni Electrophotographic image forming apparatus and a developing uni

1998-04-02

2000-02-15

Lee, Susan S. Y.

Electrophotography

Diagnostics

Consumable

399 27, 399103, G03G 1508

Patent

active

060262532

ABSTRACT:
An electrophotographic image forming apparatus for forming an image on recording medium, includes a mounting portion capable of detachably mounting a developing unit including a developing member for developing a latent image formed on an electrophotographic photosensitive member, a developing agent containing portion for containing developing agent to be supplied to the developing member and a signal output member for outputting a signal corresponding to a remaining amount of developing agent contained in the developing unit, and a remaining amount detecting portion for detecting the remaining amount of the developing agent contained in the developing unit when the developing unit is mounted to the mounting portion. The remaining amount detecting portion detects a pre-signal outputted from the signal output member prior to image formation, to detect the remaining amount of the developing agent on the basis of a detected result.

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patent: 5784665 (1998-07-01), Bae

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