US PATENT SUBCLASS 164 / 255
.~.~ Through porous mold body

Current as of: June, 1999
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164 /   HD   METAL FOUNDING

253  DF  MEANS TO APPLY VACUUM DIRECTLY TO WORK OR TO HOLD OR MANIPULATE SHAPING MEANS {1}
254  DF  .~ Means applying vacuum or suction directly to molten casting material {2}
255.~.~ Through porous mold body

DEFINITION

Classification: 164/255

(under subclass 254) Apparatus wherein the vacuum is applied to the casting material through a vent or minute openings in a mold wall.