Patent ID: 6099948
Filing Date: 2000-08-08
Classification: B29C,B29K,B32B,B62D,Y10T

Abstract:
A capsule for filling a hollow substrate comprising a pre-expanded foam core, said foam core being in a compressed condition, a thermoplastic outer covering completely enveloping said foam core and maintaining said foam core in said compressed condition in a sealed chamber within said outer covering, said outer covering being made of a material which melts at a lower temperature than said foam core, said covering being made of a material which adheres to said foam cover upon melting, said outer covering permitting said foam core to return toward its expanded condition to fill the hollow space upon sufficient softening of said outer covering by the application of heat, and said outer covering including a peripheral margin providing more material of said outer covering around the peripheral edges of said foam core then along the intermediate sides to provide sufficient outer covering material to bond to said foam core and form a sealing layer upon melting of said covering.