US PATENT SUBCLASS 34 / 574
.~.~.~ Controlled by weight

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

523  DF  APPARATUS {40}
524  DF  .~ With automatic control {11}
573  DF  .~.~ Of treated material feeding or discharging {2}
574.~.~.~ Controlled by weight

DEFINITION

Classification: 34/574

Controlled by weight:

(under subclass 573) Subject matter wherein the means for feeding or discharging is powered after an accumulation of a certain mass of the material being treated.