US PATENT SUBCLASS 264 / 519
.~ Differential temperature conditioning

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.~ 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}
522  DF  .~.~> Starting material is nonhollow planar finite length preform or product is planar and of finite length

DEFINITION

Classification: 264/519

Differential temperature conditioning:

(under subclass 500) Processs in which different degrees of heating or cooling are positively applied to the workpiece to cause one part to be a higher temperature than another.

(1) Note. To be placed herein, a patent should recite a positively applied temperature differential. Normal heating or cooling to ambient temperatures, for example, wherein an article may be cooled at the surface temporarily more than at the core, is not sufficient to place a patent herein.

(2) Note. This subclass does not include heating for stress relief after forming, such processes will be found with the molding process.