Method and apparatus for controlling toner concentration of a li

Details Method and apparatus for controlling toner concentration of a li Method and apparatus for controlling toner concentration of a li

1977-06-22

1980-05-27

Corbin, John K.

Optics: measuring and testing

By shade or color

Photography

356443, G01A 346

Patent

active

042047668

ABSTRACT:
Method and apparatus for detecting and controlling the concentration of active toner particles in a liquid developer comprising taking a sample or proportion of liquid developer and subjecting it to an electrostatic field, measuring the toner particle concentration influenced by the field and correcting the concentration of effective toner particles in the developer by restoring said concentration to an acceptable predetermined level, and further measuring the concentration of degraded toner particles left in the liquid developer to determine if the entire developer is to be replaced.

REFERENCES:
patent: 3702403 (1972-11-01), Kishi
patent: 3943771 (1976-03-01), Handa et al.
patent: 4032227 (1977-06-01), Hubbard et al.
patent: 4043293 (1977-08-01), Ruckdeschel
patent: 4054230 (1977-10-01), Suzuki et al.

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