Magnetic brush cleaning device for image forming apparatus

Details Magnetic brush cleaning device for image forming apparatus Magnetic brush cleaning device for image forming apparatus

1982-12-17

1984-09-11

Moses, R. L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

1525651, 15 15R, G03G 2100

Patent

active

044706944

ABSTRACT:
A cleaning device for an image forming apparatus includes a magnetic brush for causing a magnetic carrier and a toner to slindingly rub a surface of a photoconductor and removing the residual toner adhering on the photoconductor surface. The cleaning device further comprises a toner recovery assembly with a bias voltage applied thereto and for electrostatically attracting the surplus toner in the magnetic brush, a detector for detecting a toner density of the magnetic brush in terms of a magnetic permeability or a resistance of the magnetic brush and a bias voltage control means for controlling the bias voltage to be applied to the toner recovering system in accordance with a detected output of the toner density detector.

REFERENCES:
patent: 3950089 (1976-04-01), Fraser et al.
patent: 4402103 (1983-09-01), Yanagawa et al.
patent: 4433904 (1984-02-01), Ikemoto et al.

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