Toner density sensor in close proximity to the regulating blade

Details Toner density sensor in close proximity to the regulating blade Toner density sensor in close proximity to the regulating blade

1990-08-31

1991-11-26

Grimley, A. T.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

With electromagnetic and/or electrostatic removal of...

355208, 355246, G03G 1508

Patent

active

050674358

ABSTRACT:
A developing apparatus is provided with a developer bearing member for bearing developer including toner particles and carrier particles to feed the developer to a developing station. A regulating member is disposed in confronting relation to the developing bearing member and adapted to regulate an amount of the developer fed to the developing station. A voltage source outputs an alternating bias voltage to the developer bearing member and to the regulating member. A detecting element is disposed in the vicinity of the regulating member and in confronting relation to the developing bearing member. The detecting element is adapted to detect toner density in the developer born by the developer bearing member. An electrical shield member is disposed between the detecting member and the regulating member.

REFERENCES:
patent: 3757999 (1973-09-01), Maksymiak
patent: 4395476 (1983-07-01), Kanbe et al.
patent: 4504136 (1985-03-01), Yoshikawa et al.
patent: 4550998 (1985-11-01), Nishikawa
patent: 4601259 (1986-07-01), Yamashita
patent: 4739365 (1988-04-01), Hino
patent: 4933254 (1990-06-01), Hosoi et al.
patent: 4985823 (1991-01-01), Tada et al.

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