Image forming apparatus

Details Image forming apparatus Image forming apparatus

1994-02-24

1996-07-09

Ramirez, Nestor R.

Photocopying

Contact printing

Light boxes

355246, G03G 2100

Patent

active

055349790

ABSTRACT:
A developing device incorporated into a copying machine of the present invention has a developer/toner supplying section in which a developing tank and a toner cartridge are independently and detachably formed. A toner density sensor for controlling toner density of developer is provided in the developing device. The toner density sensor is used to detect a developer drawing defect and maintain a predetermined value of toner density during the copying operation when developer is supplied from the developer/toner supply section.

REFERENCES:
patent: 4742370 (1988-06-01), Murakami et al.
patent: 4901115 (1990-02-01), Nakamura et al.
patent: 4999676 (1991-03-01), Mouri
patent: 5012286 (1991-04-01), Kawano et al.
patent: 5043764 (1991-08-01), Arnold et al.
patent: 5166730 (1992-11-01), Urabe

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