US PATENT SUBCLASS 209 / 321
.~.~.~.~.~ Pneumatic

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}
320  DF  .~.~.~.~ With agitators and conveyors {3}
321.~.~.~.~.~ Pneumatic

DEFINITION

Classification: 209/321

(under subclass 320) Flat reciprocating sifters associating with pneumatic agitating means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

26, through 29, for combinations of sifting with gaseous suspension type separations.

318, for plural superposed plane sifters with pneumatic agitating means.