Method of determining the density of toner

Details Method of determining the density of toner Method of determining the density of toner

1991-03-04

1993-06-01

Pendegrass, Joan H.

Photocopying

Contact printing

Light boxes

355204, G03G 1508

Patent

active

052164705

ABSTRACT:
Disclosed is a method of determining the density of toner in the developer in an image forming apparatus by the use of a density sensor which is located beside a stirring member for stirring the developer. The density of toner is repeatedly measured at regular intervals for a predetermined period of time, which is the time required for the stirring member to make one complete revolution or a plurality of complete revolutions. The measured values of toner density are averaged, so that the mean value is taken as the density of toner in the developer. Since the values of toner density are averaged over the above-mentioned predetermined period of time, the unevenness in the toner density caused by the revolution of the stirring member is leveled off, thereby attaining accuracy in the determination of the toner density. Also because the density sensor is located beside the stirring member, the height of the developer tank can be kept small.

REFERENCES:
patent: 4168901 (1979-09-01), Ito et al.
patent: 4758861 (1988-07-01), Nakamaru et al.
patent: 4860063 (1989-08-01), Okamoto
patent: 4901115 (1990-02-01), Nakamura et al.
patent: 5031123 (1991-07-01), Narukawa

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