Photocopying – Contact printing – Light boxes
Patent
1992-12-09
1993-11-16
Pendegrass, Joan H.
Photocopying
Contact printing
Light boxes
118651, G03G 1506
Patent
active
052628280
ABSTRACT:
An image forming apparatus accommodates a developing bias power unit for applying a bias voltage to a developing sleeve confronting a photosensitive member. The developing bias power unit includes a DC power source, an electricity storage element interposed between the DC power source and the developing sleeve, and a controller for on-off controlling the DC power source. When an output of the DC power source is activated, the electricity storage element is electrically charged by an output voltage of the DC power source, and a first voltage is applied to the developing sleeve. In contrast, when the output of the DC power source is deactivated, a second voltage of reverse polarity is applied to the developing sleeve by electric charge held in the electricity storage element.
REFERENCES:
patent: 3866574 (1975-02-01), Hardennrook et al.
patent: 4350749 (1982-09-01), Ohnuma et al.
patent: 4395476 (1983-07-01), Kanbe et al.
patent: 4984022 (1991-01-01), Matsushita et al.
Goto Hiroshi
Hara Kazuyoshi
Oka Tateki
Saito Hitoshi
Sakuraba Tamotsu
Minolta Camera Kabushiki Kaisha
Pendegrass Joan H.
LandOfFree
Developing bias power unit for use in an image forming apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Developing bias power unit for use in an image forming apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Developing bias power unit for use in an image forming apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-25246