Developer density detection device

Details Developer density detection device Developer density detection device

1988-08-29

1990-01-02

Grimley, Arthur T.

Photocopying

Contact printing

Light boxes

118689, G03G 1509

Patent

active

048916757

ABSTRACT:
A device for detecting the density of a two-component developer consisting essentially of a toner and a carrier for an electrophotographic copying machine and the like comprises a cylindrical magnet and a sleeve which covers it. They rotate inside a developing tank so that the developer will flow in a layer on the sleeve surface. A baffle plate is provided to control this flow and to form a small pool of the developer where its density can be effectively measured by a sensor. The bottom end of the baffle plate near the sleeve surface is immersed in the developer inside the tank so that the motion of the developer into and out of the pool formed in the vicinity of the sensor is smooth and stable.

REFERENCES:
patent: 3892672 (1975-07-01), Gawron
patent: 4364659 (1982-12-01), Noda
patent: 4592645 (1986-06-01), Kanai et al.

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