Magnetic brush development apparatus with developer supply detec

Details Magnetic brush development apparatus with developer supply detec Magnetic brush development apparatus with developer supply detec

1978-11-30

1980-04-15

Welsh, John D.

Coating apparatus

Control means responsive to a randomly occurring sensed...

Responsive to condition of coating material

118691, 222DIG1, 222 65, 430122, G03G 1509

Patent

active

041978137

ABSTRACT:
The magnetic brush development apparatus for developing a latent electrostatic image on a photoconductive material by a magnetic brush formed on a development sleeve comprises a hopper whose outlet for supplying one-component type magnetic developer to the development sleeve is positioned in proximity to the surface of the development sleeve, and a developer detecting apparatus comprising a light emitting element and a light receiving element is positioned in proximity to the outlet of the hopper and the surface of the development sleeve. The light emitting element and the light receiving element are positioned so as to hold therebetween a transparent container for allowing the developer to pass therethrough.

REFERENCES:
patent: 3765654 (1973-10-01), Rarey et al.
patent: 3872825 (1975-03-01), Davidson

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