Image forming apparatus with toner detection

Details Image forming apparatus with toner detection Image forming apparatus with toner detection

1991-10-11

1994-03-22

Grimley, A. T.

Photocopying

Contact printing

Light boxes

346160, 355211, G03G 2100

Patent

active

052968952

ABSTRACT:
An electrophotographic image forming apparatus which comprises a photoreceptor medium including a substrate and a photosensitive layer formed on the substrate, and a photo-electric toner sensor assembly for measuring the amount of rays of light undergoing a diffuse reflection from the photoreceptor medium. The substrate has a regularly developed pattern of grooves formed thereon. The photoelectric toner sensor assembly comprises a light emitting element for projecting the rays of light onto the photoreceptor medium so as to reflect therefrom and a light receiving element for detecting the rays of light undergoing the diffuse reflection. The light emitting and receiving elements are so positioned that a common plane containing respective optical axes of those light emitting and receiving elements can lie substantially parallel to any one of the grooves on the substrate.

REFERENCES:
patent: 4313671 (1982-02-01), Kuru
patent: 4617245 (1986-10-01), Tanaka et al.
patent: 4735908 (1988-04-01), Higashi et al.
patent: 4796065 (1989-01-01), Kanbayashi
patent: 4910557 (1990-03-01), Imai
patent: 4950905 (1990-08-01), Butler et al.
patent: 4984022 (1991-01-01), Matsushita et al.

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