US PATENT SUBCLASS 425 / 546
.~ With means to evacuate mold or provide controlled environment

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

542  DF  FEMALE MOLD AND CHARGER TO SUPPLY FLUENT STOCK UNDER PRESSURE THERETO IN FLUID-TIGHT RELATIONSHIP (E.G., INJECTION MOLD, ETC.) {17}
546.~ With means to evacuate mold or provide controlled environment

DEFINITION

Classification: 425/546

(under subclass 542) Apparatus including means to assure the emptiness of the shaping cavity; or to regulate the atmosphere about the shaping cavity structure.

(1) Note. Included herein is means to clean the mold prior to operation and means to create a reduced atmosphere, i.e., vacuum of power vent means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

812, for an art collection of patents directed to mold venting in general.