Gas current classifier and process for producing toner

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

1995-09-20

2000-01-18

Walsh, Donald P.

Classifying, separating, and assorting solids

Fluid suspension

Gaseous

2091391, B07B 400, B07B 704

Patent

active

060150483

ABSTRACT:
A gas current classifier which comprises a classifying chamber, a material feed nozzle for introducing a material powder into the classification zone of the classifying chamber, and a Coanda block for classifying the material powder thus introduced by the Coanda effect to separate the powder into at least a fraction of fine powder and a fraction of coarse powder, wherein the material feed nozzle has a material receiving opening for introducing the material powder into the material feed nozzle the material powder is introduced into the classification zone from an orifice of the material feed nozzle while its flow is accelerated by the gas stream within the material feed nozzle and the Coanda block is provided at a position higher than the orifice of the material feed nozzle.

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Okuda, et al, "Application of Fluidics . . . Classification," Int'l Symposium on Powder Techn. (1981) pp. 771-781.

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