Method of resetting toner shortage of an image forming apparatus

Details Method of resetting toner shortage of an image forming apparatus Method of resetting toner shortage of an image forming apparatus

1989-12-04

1992-04-14

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355209, 355246, 118689, G03G 2100

Patent

active

051052180

ABSTRACT:
A method of resetting a toner shortage condition and a toner shortage indication associated with a developing device of an image forming apparatus. When the developing device has reached a toner shortage condition, a toner stortage indication is produced for urging one to supply a fresh toner or to replace a toner cartridge. The toner shortage condition and toner shortage indication are reset only when a predetermined period of time expires from the instant when one opens a door or a cover of the apparatus for the supply of toner to the instant when one closes it after the supply of toner.

REFERENCES:
patent: 4669856 (1987-06-01), Yamada
patent: 4687320 (1987-08-01), Nakanishi et al.
patent: 4739367 (1988-04-01), Watanabe et al.
patent: 4839691 (1989-06-01), Tagawa et al.
patent: 4873549 (1989-10-01), Tada et al.
patent: 4916490 (1990-04-01), Tanaka et al.
patent: 4952976 (1990-08-01), Katoh et al.

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