US PATENT SUBCLASS 432 / 53
.~.~ And of furnace closure or heating element operator

Current as of: June, 1999
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432 /   HD   HEATING

51  DF  HAVING TIMING, PROGRAMMING OR CYCLING CONTROL MEANS {1}
52  DF  .~ Of handling or treatment of discrete work batch or unit {1}
53.~.~ And of furnace closure or heating element operator

DEFINITION

Classification: 432/53

(under subclass 52) Apparatus ... in which the means controls (1) a heating chamber access closure or a heater and (2) a work unit advancer or manipulator.