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Ball

  • US 4,463,951 A
  • Filed: 03/09/1982
  • Issued: 08/07/1984
  • Est. Priority Date: 03/17/1981
  • Status: Expired due to Term
First Claim
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1. A ball comprising:

  • a spherical body of polyurethane foam having open cells, anda surface layer of foamed polyvinyl chloride having closed cells integrally formed on the surface of said spherical body of polyurethane foam;

    said ball having been produced by forming said surface layer by rotational casting in a mold to form a hollow foamed polyvinyl chloride body having closed cells and a central cavity therein and charging a foamable polyurethane composition into said cavity and foaming said composition to integrally form a spherical body of polyurethane foam having open cells integral with said surface layer of foamed polyvinyl chloride having closed cells.

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