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  • The process of claim 21, wherein in step (c) the supporting mold is a second mold which is different from that used in molding the outer shell component, and the premolded shell component is removed from its mold prior to introducing the polystyrene composition into its cavity. 32 References Cited UNITED STATES PATENTS 3,091,946 6/1963 Kesling 264- X 2,753,642 7/1956 Sullivan 264-45 X 3,283,386 11
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