US PATENT SUBCLASS 264 / 901
.~ Heat-setting of stretched or molecularly oriented article formed from planar preform (e.g., sheet, film, etc.)

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}
901.~ Heat-setting of stretched or molecularly oriented article formed from planar preform (e.g., sheet, film, etc.)

DEFINITION

Classification: 264/901

Heat-setting of stretched or molecularly oriented article formed from planar preform (e.g., sheet, film, etc.):

Process under cross-reference art collection 900 wherein (a) differential fluid pressure is used to cause stretching or molecular orientation of at least a portion of a planar preform, and (b) at least part of the stretched or oriented portion is subjected to heat-setting.