US PATENT SUBCLASS 264 / 904
.~ Maintaining article in fixed shape during heat-setting

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

900  DF  DIRECT APPLICATION OF FLUID PRESSURE DIFFERENTIAL TO SHAPE, RESHAPE (I.E., DISTORT), OR SUSTAIN AN ARTICLE OR PREFORM AND HEAT-SETTING (I.E., CRYSTALLIZING OF STRETCHED OR MOLECULARLY ORIENTED PORTION) THEREOF {5}
904.~ Maintaining article in fixed shape during heat-setting

DEFINITION

Classification: 264/904

Maintaining article in fixed shape during heat-setting:

Process under cross-reference art collection 900 wherein the shape of a previously stretched or molecularly oriented workpiece is sustained by application of a positive or negative fluid pressure differential while the workpiece undergoes heat-setting.