Toner concentration monitoring apparatus located behind a transp

Details Toner concentration monitoring apparatus located behind a transp Toner concentration monitoring apparatus located behind a transp

1983-06-20

1985-03-26

Prescott, A. C.

Photocopying

Including fiber optics

355 14D, 222DIG1, G03G 1508

Patent

active

045069735

ABSTRACT:
A copier/duplicator has transparent photoconductor with a first surface on which a latent electrostatic image is formed. The latent image is developed by toner particles applied as the photoconductor is moved through a development station. A toner concentration monitor includes an emitting element and a detector. The emitting element directs a beam of radiation through the photoconductor from a second surface thereof toward an area of the development station where a developer mixture including toner particles is being provided to the first surface of the photoconductor. The detector is located adjacent the second surface of the photoconductor to receive rays emitted by the element and reflected from the developer mixture through the transparent photoconductor.

REFERENCES:
patent: 3610205 (1971-10-01), Rarey et al.
patent: 3756192 (1973-09-01), Locklar et al.
patent: 3830401 (1974-08-01), Benwood et al.
patent: 3876106 (1975-04-01), Powell et al.
patent: 3926145 (1975-12-01), Muth
patent: 4141645 (1979-02-01), Reid et al.
patent: 4155638 (1979-05-01), Blitzer
patent: 4197813 (1980-04-01), Yano et al.
patent: 4377338 (1983-03-01), Ernst
patent: 4408871 (1983-10-01), Kojima
patent: 4416535 (1983-11-01), Tottori
patent: 4423948 (1984-01-01), Kimura et al.
IBM Technical Disclosure Bulletin, Apr. 1979, vol. 21, No. 11.
IBM Technical Disclosure Bulletin, Sep. 1977, vol. 20, No. 4.

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