Photocopying – Contact printing – Light boxes
Patent
1993-08-10
1996-06-25
Braun, Fred L.
Photocopying
Contact printing
Light boxes
G03G 1508, G03G 2100
Patent
active
055305288
ABSTRACT:
An image forming apparatus having a developing unit for developing an electrostatic latent image on a photosensitive drum with a one-component toner, consisting of an endless latent image carrier; an image forming unit for forming an electrostatic latent image on the image carrier; a developing unit, for causing the developing roller to contact the image carrier to develop the electrostatic latent image on the image carrier; a mechanism for driving the developing unit; a toner sensor for detecting the presence/absence of the toner in the developing unit; and an abutting/detaching mechanism for abutting or detaching the developing roller of the developing unit on or from the image carrier. According to one aspect of this invention, this apparatus further has a controller for executing an image forming mode to control image formation in response to an image forming instruction, and a developer supply mode for, with the developing roller set apart from the image carrier, driving the driving mechanism to supply the toner to the developing roller in accordance with an output of the toner sensor indicating an insufficient amount of the toner.
REFERENCES:
patent: 4999676 (1991-03-01), Mouri
Furukawa Mitsuhito
Houki Yoji
Kera Hiroshi
Kojima Takeo
Matsuoka Makoto
Braun Fred L.
Fujitsu Isotec Limited
Fujitsu Limited
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