Developing unit for an electro-photographic apparatus

Details Developing unit for an electro-photographic apparatus Developing unit for an electro-photographic apparatus

1988-04-19

Prescott, A. C.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 3DD, 118688, 118691, G03G 1508

Patent

active

047393653

ABSTRACT:
A developing unit for an electro-photographic apparatus is described, including a toner concentration sensor provided between a paddle roller and a developing roller near the bottom of the casing. The sensor generates a toner concentration signal with high sensitivity but without substantial fluctuation.

REFERENCES:
patent: 4416535 (1983-11-01), Tottori
patent: 4451135 (1984-05-01), Okumura
patent: 4536080 (1985-08-01), Hauser et al.
patent: 4550998 (1985-11-01), Nishikawa
patent: 4551002 (1985-11-01), Aoki et al.

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