US PATENT SUBCLASS 162 / 261
.~ With beating, refining, and/or disintegrating means

Current as of: June, 1999
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162 /   HD   PAPER MAKING AND FIBER LIBERATION

232  DF  APPARATUS {22}
261.~ With beating, refining, and/or disintegrating means

DEFINITION

Classification: 162/261

(under subclass 232) Apparatus having means subjecting the stock material to an attrition step.

SEE OR SEARCH CLASS

241, Solid Material Comminution or Disintegration, appropriate subclasses for apparatus for performing an attrition step on fibrous material when not in combination with a chemical treatment.