US PATENT SUBCLASS 209 / 265
.~.~.~.~ Imperforate sections

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  DF  .~.~ Material positioning {1}
264  DF  .~.~.~ Guides {2}
265.~.~.~.~ Imperforate sections

DEFINITION

Classification: 209/265

(under subclass 264) Sifting devices associated with an imperforate surface or surfaces which operate to position particles of material relatively to the sifting passages, generally by causing particles having larger dimensions in one or more directions than in others to arrange themselves so that the larger dimensions shall be in planes paralleling the sifting surface.