US PATENT SUBCLASS 264 / 327
.~.~.~ Differential heating or cooling in mold

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

239  DF  MECHANICAL SHAPING OR MOLDING TO FORM OR REFORM SHAPED ARTICLE {10}
299  DF  .~ Shaping against forming surface (e.g., casting, die shaping, etc.) {10}
319  DF  .~.~ Applying heat or pressure {6}
327.~.~.~ Differential heating or cooling in mold

DEFINITION

Classification: 264/327

(under subclass 319) Processes wherein different degrees of heating or cooling are positively applied simultaneously to the article or molding material, or different portions thereof, while said article is still in the mold.

(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 cooler at the surface temporarily than at the core, is not sufficient to place a patent herein.

(2) Note. Maintaining a uniform temperature of the product by the nonuniform application or removal of product heat is classified herein.