US PATENT SUBCLASS 425 / 504
.~.~ Vacuum or suction

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

500  DF  PREFORM ASSEMBLY MEANS AND MEANS FOR BONDING OF PLURAL PREFORMS INVOLVING PREFORM RESHAPING OR VULCANIZING {8}
503  DF  .~ Reshaping means utilizing fluid pressure directly contacting work {1}
504.~.~ Vacuum or suction

DEFINITION

Classification: 425/504

(under subclass 503) Apparatus in which the reshaping is accomplished by means producing a reduced fluid pressure on at least one preform surface so as to provide a differential pressure utilized as a shaping force.