US PATENT SUBCLASS 432 / 129
.~.~.~ Work moved to drop between shelf or trough-type chambers

Current as of: June, 1999
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432 /   HD   HEATING

120  DF  WORK CHAMBER HAVING HEATING MEANS {12}
121  DF  .~ Having means by which work is progressed or moved mechanically {9}
128  DF  .~.~ Plural distinct chambers {2}
129.~.~.~ Work moved to drop between shelf or trough-type chambers {2}
130  DF  .~.~.~.~> Combustion products generated in or fed to chamber {1}
132  DF  .~.~.~.~> Heated shelf or trough

DEFINITION

Classification: 432/129

(under subclass 128) Apparatus in which the chambers are formed by vertically spaced substantially horizontal shelves or troughs and the work follows a downward path, dropping from chamber to chamber.

SEE OR SEARCH CLASS

34, Drying and Gas Vapor Contact With Solids,

178, for a shelf or zigzag treated material flow type of drier.