Image-forming apparatus and a method for a detecting developer a

Details Image-forming apparatus and a method for a detecting developer a Image-forming apparatus and a method for a detecting developer a

1990-02-08

1991-07-30

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

355245, 118694, 340617, F03G 1508, G03G 2100

Patent

active

050363581

ABSTRACT:
An image-forming apparatus includes: a photosensitive member; a developing device; a developer accommodating device for accommodating the developer to be supplied to the developing device, the accommodating device having a housing of which a first and second windows made of transparent members are arranged at a ceiling and a bottom; a cleaning device for periodically cleaning the first and second windows; and a detecting device having a light emitting device arranged outside the housing and confronting with one of the windows, and a light receiving device arranged outside the housing and confronting with the other of the windows. Light emitted from the light emitting device is illuminated through the light emitting device. The light receiving device receives the light emitted from the light emitting device to detect an amount of the developer in the housing. A method for detecting an amount of developer in the developing device, includes the steps of: cleaning the first and second windows periodically; emitting light through one of the windows into the housing; receiving the emitted light through the other of the windows; and detecting the amount of the developer in the housing according to a light receiving amount.

REFERENCES:
patent: 4506804 (1985-03-01), Oka
patent: 4646679 (1987-03-01), Ohno et al.
patent: 4791454 (1988-12-01), Takahashi et al.
patent: 4963929 (1990-10-01), Ueda et al.

Affiliated with

Also associated with

Rating

Image-forming apparatus and a method for a detecting developer a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image-forming apparatus and a method for a detecting developer a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image-forming apparatus and a method for a detecting developer a will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1545415