US PATENT SUBCLASS 209 / 270
.~.~.~ Drum


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

233  DF  SIFTING {16}
268  DF  .~ With liquid treatment {3}
*  DD  .~.~ Rotating sifters {3}
270.~.~.~ Drum


DEFINITION

Classification: 209/270

(under subclass 268) Means and methods wherein rotating cylindrical or drum sifters are employed to sift material suspended in liquid or liquid-supply means are associated therewith to promote sifting.

SEE OR SEARCH THIS CLASS, SUBCLASS:

12.1, 13, 14, 17, 42, and 44, for combinations of sifting and fluid suspension or stratifying type separations.

SEE OR SEARCH CLASS

162, Paper Making and Fiber Liberation,

323+, and 357 for paper making machines employing a foraminous cylinder mold.