US PATENT SUBCLASS 425 / 420
.~.~ Including provision to remove entrained gas

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

406  DF  PRESS FORMING APPARATUS HAVING OPPOSED PRESS MEMBERS {6}
412  DF  .~ Male shaping member and female mold {11}
420.~.~ Including provision to remove entrained gas

DEFINITION

Classification: 425/420

(under subclass 412) Apparatus comprising means especially adapted to permit trapped gas to escape or be removed from within a mold cavity or the material being shaped.

SEE OR SEARCH THIS CLASS, SUBCLASS:

153+, for molding devices which including safety means to relieve gaseous pressure.

203, for molding devices which include a mixing chamber with a vent.

401, for devices for reshaping preforms including a sprue or vent.

405.1+, for molding devices including means to apply a vacuum within a press form mold. 812, for a collection of means to vent molding devices in general.