US PATENT SUBCLASS 209 / 253
.~.~ Selective

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

233  DF  SIFTING {16}
243  DF  .~ Feeding {5}
253.~.~ Selective

DEFINITION

Classification: 209/253

(under subclass 243) Devices including a series of sifters and means whereby material may be delivered at will to any desired sifter of the series by manipulation of the feeding means or shifting of the positions of the series of sifters.