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Speaker edge, method of foam-molding the same,apparatus for foam-molding the same, speaker edge foam-molding system, and speaker employing the speaker edge

  • US 20030106740A1
  • Filed: 07/01/2002
  • Published: 06/12/2003
  • Est. Priority Date: 10/26/2000
  • Status: Active Grant
First Claim
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1. A speaker edge made of a thermosetting composition whose main ingredients are a polyurethane prepolymer and a latent hardener, and the latent hardener being an inactivated solid polyamine, wherein a gas is dispersed in the thermosetting composition, prior to feed thereof into a mold, so that the composition subsequently foams and solidifies itself in the mold to give the speaker edge.

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