Gas stream classifier and process for producing toner

Details Gas stream classifier and process for producing toner Gas stream classifier and process for producing toner

1996-07-22

1999-08-10

Nguyen, Tuan N.

Classifying, separating, and assorting solids

Fluid suspension

Gaseous

209 2, 209146, 209154, 430137, B07B 700, G03G 900

Patent

active

059344784

ABSTRACT:
A gas stream classifier has a gas stream classifier for classifying a feed powder supplied from a feed supply nozzle, into at least a coarse powder fraction, a median powder fraction and a fine powder fraction by an inertia force acting on particles and a centrifugal force acting on a curved gas stream due to Coanda effect in a classification zone, wherein the classification zone is defined by at least a Coanda block and a plurality of classifying edges, the feed supply nozzle is attached at the top of the gas stream classifier, the Coanda block is attached on one side of the feed supply nozzle, and the feed supply nozzle has at its rear end a feed powder intake portion for supplying the feed powder, and a high-pressure air intake portion.

REFERENCES:
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patent: 5111998 (1992-05-01), Kanda et al.
patent: 5447275 (1995-09-01), Goka et al.
Patent Abstracts of Japan, vol. 96, No. 11, Nov. 1996 for JP-08-182966.
Patent Abstracts of Japan, vol. 95, No. 6, Jul. 1995 for JP-07-60194.
Okuda, S. "Classification of Ultra-fine Powder", 17th Lecture and Discussion concerning Powder Engineering, pp. 15-27 (1983).
Okuda, et al., "Application of Fluidics Principle to Fine Particle Classification", Proc. Int'l Symposium on Powder Techn. pp. 771-780 (1981) .

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