Patents Assigned to Ronald D. Erwin
  • Process for manufacturing foam-filled extruded products
    Patent number: 5665284
    Abstract: A process for fabricating an article having a rigid foam core and a resilient outer plastic shell by extruding heated thermoplastic material to form the shell, partially hardening the extruded a plastic shell, injecting a liquid foam material into the interior of the partially hardened plastic shell, and cooling the shell and the liquid foam material to fully harden the plastic shell and the foam under conditions which cause the article to have a predetermined shape and size.
    Type: Grant
    Filed: April 26, 1995
    Date of Patent: September 9, 1997
    Assignee: Ronald D. Erwin
    Inventors: Ronald Dean Erwin, Marvin Ray Whitley