Toner density detecting device

Details Toner density detecting device Toner density detecting device

1985-04-25

1987-03-17

Grimley, A. T.

Photocopying

Including fiber optics

355 14D, 118689, 336 90, G03G 1509

Patent

active

046503102

ABSTRACT:
A toner density detecting device is provided with a coil buried in a housing and a cover member provided on one end of the coil to prevent the developing agent from touching the coil. The cover member has a front end portion provided near the surface of the housing and extending along the developing agent flowing direction and an apex portion at the back of the front end portion with respect to the direction. The apex portion projects deeper into the developing agent than the front end portion. An edge connecting the front end portion and the apex portion extends in the direction to cross the central axis of the coil. A pair of faces extending in the direction on either side of the edge are gradually declined from the edge toward the surface of the housing.

REFERENCES:
patent: 3611280 (1971-10-01), Sheehy
patent: 3825886 (1974-07-01), Thigpen
patent: 3872824 (1975-03-01), Erney et al.
patent: 3962992 (1976-06-01), Takagi et al.
patent: 4147127 (1979-04-01), Terashima
patent: 4174902 (1979-11-01), Hamaguchi

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