Electrostatic reproducing apparatus

Details Electrostatic reproducing apparatus Electrostatic reproducing apparatus

1982-10-28

1985-03-19

Prescott, A. C.

Photocopying

Including fiber optics

355 14R, G03G 1500

Patent

active

045055726

ABSTRACT:
An electrostatic reproducing apparatus characterized in that a sensor unit consisting integrally of at least one light emitting element and one light receiving element is disposed close to the surface of a photosensitive member at a position downstream of the position where the printed sheet of recording paper separates from the photosensitive member. One of the light emitting elements is a visible-light emitting diode for detecting jamming of the sheet of recording paper and the other light emitting element is an infrared-light emitting diode for detecting the toner concentration.

REFERENCES:
patent: 3815988 (1974-06-01), McVeigh et al.
patent: 4303332 (1981-12-01), Sakai
patent: 4341460 (1982-07-01), Kohyama

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