US PATENT SUBCLASS 34 / 114
.~.~.~.~ Gas or vapor circulation for contact with treated material

Current as of: June, 1999
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34 /   HD   DRYING AND GAS OR VAPOR CONTACT WITH SOLIDS

523  DF  APPARATUS {40}
108  DF  .~ Rotary drums or receptacles {7}
110  DF  .~.~ External {6}
113  DF  .~.~.~ Plural {5}
114.~.~.~.~ Gas or vapor circulation for contact with treated material {1}
115  DF  .~.~.~.~.~> Through material or introduction through drum

DEFINITION

Classification: 34/114

(under subclass 113) Apparatus including means to contact the solids undergoing treatment with a gas or vapor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

117, where the sheet web or strand is fed through the drum assembly by fluid (usually air) blasts.

122, for single drums having this combination.