Apparatus for detecting toner density

Details Apparatus for detecting toner density Apparatus for detecting toner density

1979-11-13

1981-07-07

Lawrence, Evan K.

Coating apparatus

Control means responsive to a randomly occurring sensed...

Responsive to condition of coating material

118658, 355 3DD, B05C 1100, G03G 1509

Patent

active

042768543

ABSTRACT:
An apparatus for detecting the density (concentration) of toner in a developer for an electrostatic recording apparatus includes an operatively moveable surface for carrying developer onto an electrostatic latent image bearing member during image development, a scraper element having at least a flat surface for scraping developer from the movable surface in a substantially steady and uniform stream along the flat face, and a substantially flat detection coil assembly having oppositely-directed faces. The coil assembly is mounted on, spaced apart from, and substantially parallel to the flat face of the scraper so that the stream of developer passes along both coil assembly faces directly after being scraped from the moveable surface, thereby enhancing the toner density detection sensitivity of the coil assembly.

REFERENCES:
patent: 4147127 (1979-04-01), Terashima
patent: 4226525 (1980-10-01), Sakamoto et al.

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