US PATENT SUBCLASS 264 / 521
.~.~.~ Heating


Current as of: June, 1999
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264 /   HD   PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES

500  DF  DIRECT APPLICATION OF FLUID PRESSURE DIFFERENTIAL TO PERMANENTLY SHAPE, DISTORT, OR SUSTAIN WORK {14}
519  DF  .~ Differential temperature conditioning {2}
520  DF  .~.~ Including application of internal fluid pressure to hollow finite length preform to force same into conformity with female mold part {1}
521.~.~.~ Heating


DEFINITION

Classification: 264/521

Heating:

(under subclass 520) Processes in which the temperature differential is created by at least heating the workpiece.