US PATENT SUBCLASS 264 / 45.5
.~.~ Autogenously formed surface layer or base supplies surface (e.g., skin forming, etc.)


Current as of: June, 1999
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264 /   HD   PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES

41  DF  PORE FORMING IN SITU (E.G., FOAMING, ETC.) {6}
45.1  DF  .~ Composite article making {7}
45.5.~.~ Autogenously formed surface layer or base supplies surface (e.g., skin forming, etc.) {1}
45.6  DF  .~.~.~> Foam surface layer produced by surface treatment of preformed base material


DEFINITION

Classification: 264/45.5

(under subclass 45.1) Processes wherein: (1) The surface of a preformed material is treated so as to form a foam or, (2) Wherein a foam from a single foamable material is formed and the density of the foam at its exterior surface is different from the density of the foam in the interior thereof.

(1) Note. Processes involving the preparation of different density foams found herein generally involve the collapsing or prevention of the expansion of foaming material in a closed mold.