US PATENT SUBCLASS 425 / 437
.~ By differential gas pressure ejecting means

Current as of: June, 1999
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425 /   HD   PLASTIC ARTICLE OR EARTHENWARE SHAPING OR TREATING: APPARATUS

436 R  DF  SHAPING SURFACE INCLUDING MEANS TO RELEASE OR REMOVE PRODUCT FROM SHAPING SURFACE {7}
437.~ By differential gas pressure ejecting means

DEFINITION

Classification: 425/437

(under subclass 436) Apparatus wherein the means to separate the molded article from its shape imparting surface includes a gas pressure differential across article.