Magnetic brush developer equipped with self-metering controls

Details Magnetic brush developer equipped with self-metering controls Magnetic brush developer equipped with self-metering controls

1975-08-04

1977-05-10

Kee Chi, James

Coating apparatus

With means to apply electrical and/or radiant energy to work...

With electromagnetic and/or electrostatic removal of...

355 3DD, 427 18, B05B 500, G03G 1509

Patent

active

040221571

ABSTRACT:
The magnetic brush arrangement provides for the formation of a brush-like mass made up of a pulverulent mix of carrier particles and toner particles supplied in measured amounts. Measured amounts of developer particles are picked up in the flutes provided on the surface of a rotating drum which is partially immersed in the granular mass. The flutes are axially parallel to the axis of rotation of the drum and it is the volume capacity of the flutes that determines the quantity of developer mix picked up and conveyed to a developing station. At the developing station there is provided a series of cylinders having disposed within magnetic flux generating means so as to attract the granular mass of particles from the flutes and pass it along the series of cylinders in the form of a moving carpet of developer mix. The attracted granular mass, which is held to the surface of these cylinders by virtue of the flux generating means, forms an upstanding brush whose size is controlled by the quantity of developer mix initially delivered. The brush formation occurs in the path of the copy material to be developed and at the end of the developing station unused powder is returned to the supply.

REFERENCES:
patent: 3152012 (1964-10-01), Schaffert
patent: 3608522 (1971-09-01), Davidson
patent: 3639050 (1972-02-01), Staller
patent: 3697050 (1972-10-01), Stanley
patent: 3849161 (1974-11-01), Klaenhammer
patent: 3855969 (1974-12-01), Andrako
patent: 3927640 (1975-12-01), Smith
IBM Technical Disclosure Bulletin, "Magnetic Brush Unit With Magnetic Conveyor," By Preeman et al., vol. 15, No. 4, Sept. 1972.

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