US PATENT SUBCLASS 209 / 263
.~.~ Material positioning

Current as of: June, 1999
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209 /   HD   CLASSIFYING, SEPARATING, AND ASSORTING SOLIDS

233  DF  SIFTING {16}
261  DF  .~ Conveying {3}
263.~.~ Material positioning {1}
264  DF  .~.~.~> Guides {2}

DEFINITION

Classification: 209/263

(under subclass 261) Means employed to cause particles of material to move in some definite relation to the sifting passages of a sifter.

SEE OR SEARCH THIS CLASS, SUBCLASS:

392+, for sifter structure, per se.

659+, for size separation of special items.