Toner concentration detecting device

Details Toner concentration detecting device Toner concentration detecting device

1983-04-18

1984-05-29

Moses, R. L.

Photocopying

Including fiber optics

118691, G03G 1506

Patent

active

044511353

ABSTRACT:
A toner concentration detecting device for detecting the toner concentration of a dry-type, two-component developer including a transparent plate arranged to be brought into contact with the developer, a light source for projecting light toward the developer through the transparent plate, and a light receiving element for receiving light scattered by the developer through the transparent plate. The transparent plate is separated optically by cutting it along a plane bisecting the light source and the light receiving element. In such a construction, multiple reflection inside the transparent plate which affects the resulting measurement can be completely eliminated, and thus it is possible to detect the toner concentration in an accurate and uniform manner.

REFERENCES:
patent: 3727065 (1973-04-01), Maksymiak
patent: 4226525 (1980-10-01), Sakamoto et al.
patent: 4265997 (1981-05-01), Extra et al.
patent: 4273843 (1981-06-01), Fujita et al.
patent: 4371257 (1983-02-01), Nishikawa

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