Coating apparatus – Control means responsive to a randomly occurring sensed... – Responsive to condition of coating material
Patent
1979-04-12
1980-12-30
Beck, Shrive P.
Coating apparatus
Control means responsive to a randomly occurring sensed...
Responsive to condition of coating material
118689, 118690, 118712, 118658, 222DIG1, 355 3DD, 355 14D, B05C 1900, G03G 1509
Patent
active
042416965
ABSTRACT:
A toner concentration detecting apparatus comprises a rotatable probe having a toner-receiving face, a case housing the probe, means attached to the case for detecting an amount of toner on the toner-receiving face, and a port formed in the case for discharging stray toner particles from the case. The toner-receiving face is put in contact with a magnetic brush of a developer mechanism, separates toner particles from a developer and receives them. The detecting means includes a light-emitting element for applying light to the toner-receiving face and a light-receiving element for receiving the light reflected by the toner-receiving face and converting the light into an electric signal. The stray toner discharging port extends in the direction in which acts centrifugal force generated by the rotation of the probe and is located near the light-emitting and light-receiving elements.
REFERENCES:
patent: 3318284 (1967-05-01), Hojo et al.
patent: 3399652 (1968-09-01), Gawron
patent: 3872825 (1975-03-01), Davidson
patent: 3897748 (1975-08-01), Hirata et al.
patent: 4112870 (1978-09-01), Extra et al.
Beck Shrive P.
Tokyo Shibaura Denki Kabushiki Kaisha
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