US PATENT SUBCLASS 264 / 2.2
.~ Changing mold size or shape during molding or with shrinkage compensation

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

1.1  DF  OPTICAL ARTICLE SHAPING OR TREATING {11}
2.2.~ Changing mold size or shape during molding or with shrinkage compensation {2}
2.3  DF  .~.~> With mold adherence or release
2.4  DF  .~.~> Preform

DEFINITION

Classification: 264/2.2

Changing mold size or shape during molding or with shrinkage compensation:

(under subclass 1.1) Processes in which the volume or morphology of the mold cavity is altered during the molding process or in which some expedient is utilized which is claimed or disclosed as compensating for the shrinkage of the material to be shaped.