US PATENT SUBCLASS 162 / 21
.~ Defibration by projection or explosion

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

1  DF  PROCESSES OF CHEMICAL LIBERATION, RECOVERY OR PURIFICATION OF NATURAL CELLULOSE OR FIBROUS MATERIAL {33}
21.~ Defibration by projection or explosion {1}
22  DF  .~.~> With chemical other than water or steam

DEFINITION

Classification: 162/21

(under subclass 1) Processes combined with the separation of the fibers from each other (1) by subjecting them to a sudden and drastic release of pressure, or (2) by projecting the fiber clumps against a solid surface.

(1) Note. In view of the fact that steam and hot water are considered as chemicals for treating the fiber within the scope of subclass 1 explosion or projection in the presence of steam or hot water is classified herein, even though no other digestion chemical is present.

SEE OR SEARCH THIS CLASS, SUBCLASS:

247, for apparatus for use in explosion or impact type defibering operations.

SEE OR SEARCH CLASS

99, Foods and Beverages: Apparatus, 323.4+, apparatus for subjecting cereals to sudden changes in pressure to disrupt the same and produce a puffed food product.

241, Solid Material Comminution or Disintegration,

1, for processes for comminuting solid material by explosion and subclass 5 for processes utilizing kinetic energy of projected or suspended material.