US PATENT SUBCLASS 209 / 312
.~.~.~.~.~ With pneumatic treatment


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

233  DF  SIFTING {16}
*  DD  .~ Plane sifters {2}
*  DD  .~.~ Horizontal and inclined {4}
*  DD  .~.~.~ Reciprocating {6}
311  DF  .~.~.~.~ Multiple {4}
312.~.~.~.~.~ With pneumatic treatment


DEFINITION

Classification: 209/312

(under subclass 311) Series of flat reciprocating sifters associated with means for pneumatically agitating the material being sifted, the sifters being associated otherwise than as defined in the subclasses indented hereunder.

(1) Note. In devices entering this subclass the pneumatic agitating means must be an essential element of the combination or have some feature specially involving such agitating means.