Apparatus for detecting and controlling a toner run-out in a dev

Photocopying – Contact printing – Light boxes

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355245, G03G 1508

Patent

active

053749774

ABSTRACT:
An apparatus for detecting and controlling a the exhaustion of toner in a developing unit of an image recording device which forms an electrostatic latent image on a latent image carrier by exposure in response to image signals and develops the electrostatic latent image to a toner image to be recorded. The apparatus includes a detection unit for detecting a presence or absence of toner in the developing unit under a condition that a power of the image recording equipment is turned on and an interlock is released, and a drive unit for driving the developing unit and the toner supplying mechanism for a predetermined period of time when the toner is exhausted as is detected by the detection unit, wherein the detection unit detects again a presence or absence of toner in the developing unit after the drive unit drives the developing unit and the toner supplying mechanism.

REFERENCES:
patent: 4647185 (1987-03-01), Takeda et al.
patent: 4682874 (1987-07-01), Fantuzzo
patent: 4711551 (1987-12-01), Fujio et al.
patent: 4952976 (1990-08-01), Katoh et al.
patent: 4987449 (1991-01-01), Katoh

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