(under subclass 277) Apparatus in which the material is presented to a rotary comminuting surface that is generally curved about and faces the axis thereof.
(1) Note. The comminuting surface may comprise the inside of a rotary drum.
SEE OR SEARCH THIS CLASS, SUBCLASS:
91, for comminuting apparatus provided with a rotary comminuting surface having openings to permit discharge of material.
228, for comminuting apparatus in which material is comminuted between an internal comminuting surface and a cooperating rotary surface.
SEE OR SEARCH CLASS
451, Abrading,
259+, for an abrading machine in which a rotary tool presents an internal face to the material.
