US PATENT SUBCLASS 432 / 201
.~.~ Air flow-through type

Current as of: June, 1999
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432 /   HD   HEATING

120  DF  WORK CHAMBER HAVING HEATING MEANS {12}
200  DF  .~ Work chamber having gaseous material supply or removal structure {2}
201.~.~ Air flow-through type {3}
202  DF  .~.~.~> Having means heating work by radiation or conduction
203  DF  .~.~.~> Pump for atmosphere
204  DF  .~.~.~> Having a movable drawer or separable tray

DEFINITION

Classification: 432/201

(under subclass 200) Apparatus in which air drawn from the atmosphere enters, passes through or across the work in the work chamber and discharges as a flowing stream.

SEE OR SEARCH CLASS

34, Drying and Gas or Vapor Contact With Solids,

218+, for a gas-solid contact house, chamber or kiln having gas or vapor circulation. The gas or vapor may be heated by a nominal heater; however, a specific combustion type heater in this combination makes it classifiable in Class 432.