Patents Assigned to Selene Trust
  • Method for molding expanded plastic material articles
    Patent number: 4260571
    Abstract: According to the method of the invention an article of thermoplastic material is partially expanded and preformed in a heated mold. The preformed article is withdrawn from the heated mold to further expand at atmospheric pressure and is transferred still malleable into a cooled mold having the final size and configuration of the article.
    Type: Grant
    Filed: April 11, 1978
    Date of Patent: April 7, 1981
    Assignee: Selene Trust
    Inventor: Albert E. Ritter