Measuring and testing – Instrument mechanism or transmission – Rate of change
Patent
1985-04-22
1987-02-03
Rolla, Joseph J.
Measuring and testing
Instrument mechanism or transmission
Rate of change
222DIG1, 118689, 324202, 250573, 7386104, G01N 1106, G03G 910
Patent
active
046401296
ABSTRACT:
A method of detecting the toner concentration of a two-component developer comprising a mixture of carrier particles and toner particles for use in an electrostatic copying apparatus or the like wherein a relationship between flow rate and the toner concentration of a two-component developer which passes through a container is obtained in advance, then the flow rate of the two-component developer whose toner concentration is unknown is measured by use of the container and developer flow rate detecting member. Thus, the toner concentration of the developer is determined from the measured flow rate and the relationship between the flow rate and the toner concentration which has been obtained in advance.
REFERENCES:
patent: 3320804 (1967-05-01), Halberstam
patent: 3572551 (1971-03-01), Gillespie et al.
patent: 3611803 (1971-10-01), Kajiura et al.
patent: 3698926 (1972-10-01), Furuichi
patent: 3831446 (1974-08-01), Dye
patent: 3999687 (1976-12-01), Baer et al.
Khoury et al, "Toner Concentration Sensor", IBM Tech. Disclosure Bulletin, vol. 13, No. 12, May 1971, p. 3607.
Miyakawa Seiichi
Sakamoto Koji
Tatsumi Susumu
Handren Frederick R.
Rolla Joseph J.
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