US PATENT SUBCLASS 241 / 88.3
.~.~.~.~.~.~ Three or more serially acting alternate perforate and imperforate surfaces

Current as of: June, 1999
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241 /   HD   SOLID MATERIAL COMMINUTION OR DISINTEGRATION

*  DD  APPARATUS {41}
83  DF  .~ Comminuting surface provided with openings to permit discharge of material {4}
84  DF  .~.~ Cooperates with moving comminuting surface or member {6}
86  DF  .~.~.~ Cooperates with rotary comminuting member {10}
88  DF  .~.~.~.~ Provided with special comminuting surfaces or characteristics {3}
88.2  DF  .~.~.~.~.~ And auxiliary imperforate surface (e.g., breakerplate) {1}
88.3.~.~.~.~.~.~ Three or more serially acting alternate perforate and imperforate surfaces

DEFINITION

Classification: 241/88.3

(under subclass 88.2) Apparatus in which the material is subjected to a succession of at least three comminuting faces which are porous and nonporous by turns.

SEE OR SEARCH THIS CLASS, SUBCLASS:

152+, for devices in which the material is subjected to a series of comminuting operations.