US PATENT SUBCLASS 264 / 520
.~.~ Including application of internal fluid pressure to hollow finite length preform to force same into conformity with female mold part

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.~.~ Including application of internal fluid pressure to hollow finite length preform to force same into conformity with female mold part {1}
521  DF  .~.~.~> Heating

DEFINITION

Classification: 264/520

Including application of internal fluid pressure to hollow finite length preform to force same into conformity with female mold part:

(under subclass 519) Processes in which a finite length preform is forced into conformity with a female mold.

(1) Note. Finite length parison includes a hollow cylindrical body of plastic which is usually sealed at one end either in its preformed state or as part of the ongoing process. The finite length parison may be a preform or the process herein may include the molding of the parison.