US PATENT SUBCLASS 432 / 22
.~.~ Establishing strata, layer or curtain

Current as of: June, 1999
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432 /   HD   HEATING

1  DF  PROCESSES OF HEATING OR HEATER OPERATION {14}
19  DF  .~ Controlling flame position or work atmosphere {7}
22.~.~ Establishing strata, layer or curtain

DEFINITION

Classification: 432/22

(under subclass 19) Process in which a heating device is operated to establish a body of gas in the form of a sheet within or forming the boundary of a heating zone.

SEE OR SEARCH THIS CLASS, SUBCLASS:

64, for a furnace chamber port or work path having a fluid curtain.