(under subclass 224) Apparatus wherein the means to drive off the moisture includes a barrel-like receptacle which is mounted to revolve about its longitudinal axis while the material is being dried.
SEE OR SEARCH THIS CLASS, SUBCLASS:
246, for incinerating apparatus employing rotary drum-type structure.
SEE OR SEARCH CLASS
34, Drying and Gas or Vapor Contact With Solids,
130+, for rotary drum-type driers.
266, Metallurgical Apparatus,
173, for rotary drum preheating or drying apparatus.
