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EP0755727A2 Gas stream classifier and process for producing toner 失效
气流分类器和生产碳粉的方法

Gas stream classifier and process for producing toner
摘要:
A gas stream classifier (1) has a gas stream classifying means for classifying a feed powder supplied from a feed supply nozzle (16), 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 (32), wherein the classification zone (32) is defined by at least a Coanda block (26) and a plurality of classifying edges (17,18), the feed supply nozzle (16) is attached at the top of the gas stream classifier (1), the Coanda block (26) is attached on one side of the feed supply nozzle (16), and the feed supply nozzle (16) has at its rear end a feed powder intake portion (42) for supplying the feed powder, and a high-pressure air intake portion (41).
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