(under the class definition) Apparatus in which (1) portions of the material are caused to move relatively with respect to other portions to effect comminution by attrition, or (2) portions of the material are subjected to pressure against other portions thereof, or (3) the material is subjected to the combined action of both attrition and compression.
SEE OR SEARCH THIS CLASS, SUBCLASS:
26, for corresponding processes.
39, for attrition devices in which the material is suspended in a fluid.
91, for rotary screen receptacles for tumbling material to comminute it by attrition.
170+, for attrition devices employing loose grinding bodies.
276, for devices in which a conveyor forces material against a stationary surface or material bed to effect the comminution.
SEE OR SEARCH CLASS
100, Presses, appropriate subclasses for presses not elsewhere provided for, and see especially
104+, for presses having drain means for expressed liquids.
451, Abrading,
32+, and 326+ for a process or apparatus for abrading articles by mutual attrition.
