Developing apparatus for electrostatic duplicator

Details Developing apparatus for electrostatic duplicator Developing apparatus for electrostatic duplicator

1980-11-21

1982-08-03

Pianalto, Bernard D.

Coating apparatus

Control means responsive to a randomly occurring sensed...

Responsive to condition of coating material

118620, 118657, 355 3DD, B05B 502, G03G 1509

Patent

active

043422837

ABSTRACT:
A developing apparatus is provided in which the toner concentration of a developing agent for electrostatic duplicator is detected with high precision by positively magnetizing the developing agent present in the detection region in a toner concentration detecting container. The developing agent within the detecting container is magnetized within a range of a magnetic flux density under which the permeability is not so changed with the change of magnetic field, even if a change of the magnetic flux of a magnetic roll or the like is produced.

REFERENCES:
patent: 3572551 (1971-03-01), Gillespie
patent: 3802381 (1974-04-01), O'Neil et al.
patent: 3999687 (1976-12-01), Baer et al.
patent: 4131081 (1978-12-01), Terashima

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