US PATENT SUBCLASS 264 / 905
.~ Having plural, distinct differential fluid pressure shaping steps

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}
905.~ Having plural, distinct differential fluid pressure shaping steps {1}
906  DF  .~.~> And heat-shrinking outside of mold including subsequent re-expanding of shrunken article using differential fluid pressure

DEFINITION

Classification: 264/905

Having plural, distinct differential fluid pressure shaping steps:

Process under cross-reference art collection 900 in which there are at least two separate shaping or reshaping steps caused by application of differential fluid pressure.