Developer restoring unit in an image forming apparatus

Details Developer restoring unit in an image forming apparatus Developer restoring unit in an image forming apparatus

1989-12-18

1992-07-07

Braun, Fred L.

Photocopying

Contact printing

Light boxes

355245, G03G 2100

Patent

active

051287242

ABSTRACT:
A developer circular unit is detachably set in a copier or a copier type printer which print on images on a paper sheet with toner. The unit includes at least a developing device, a cleaner, and a developer conveying device having a pipe communicated with both the cleaner and the developing device and a toner flowing-back preventing mechanism. The action of the mechanism is automatically released by the first set of the unit in the copier or printer and/or the first use of the copier or printer after that first set.

REFERENCES:
patent: 3752576 (1973-08-01), Gerbasi
patent: 4030824 (1977-06-01), Smith
patent: 4313674 (1982-02-01), Ura et al.
patent: 4323306 (1982-04-01), Ito et al.
patent: 4630653 (1986-12-01), Kan
patent: 4768055 (1988-08-01), Takamatsu et al.
patent: 4849791 (1989-07-01), Hagihara et al.
patent: 4937625 (1990-06-01), Kato et al.
patent: 4941022 (1990-07-01), Ohmura et al.

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