Method of generating a spherical grain

Details Method of generating a spherical grain Method of generating a spherical grain

1986-03-24

1988-08-09

Goodrow, John L.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Process of making developer composition

241 5, G03G 900

Patent

active

047627654

ABSTRACT:
The invention relates to a process for producing a spherical grain shape in fine grain toners. The toners are of the type used in electrophotography for developing latent charge images. The treatment of the toner takes place in a material bed which is fluidized by gas streams which are directed against one another. In this manner the grains are subjected to a multitude of reciprocal collisions and friction stress. The intensity of the collisions and frictional stress are adjusted through selection of the operating pressure, velocity, direction and temperature of the gas streams. Thus the grains undergo permanent deformation. A classifier to separate out the super-fine portion resulting from abrasion.

REFERENCES:
patent: 3196032 (1965-07-01), Seymour
patent: 3311307 (1967-03-01), Lopker
patent: 3586654 (1971-06-01), Lerman et al.
patent: 3639245 (1972-02-01), Nelson
patent: 4251616 (1981-02-01), Hendriks
patent: 4455360 (1984-06-01), Ishikawa et al.
patent: 4579288 (1986-04-01), McDermid et al.
patent: 4602743 (1986-07-01), Nied
patent: 4645606 (1987-02-01), Ashbrook et al.

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