US PATENT SUBCLASS 209 / 318
.~.~.~.~.~.~ 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}
315  DF  .~.~.~.~.~ Superposed {4}
318.~.~.~.~.~.~ With pneumatic treatment

DEFINITION

Classification: 209/318

(under subclass 315) Pluralities of flat reciprocating sifters arranged one above another associated with special structures or means for pneumatically agitating the material being sifted.

SEE OR SEARCH THIS CLASS, SUBCLASS:

26, through 29, for combinations of gaseous suspension and sifting means.

276, and 280, for convex or concave sifters with agitating means.

321, for horizontal or inclined plane sifters with pneumatic agitator or conveyor.