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HEAT-INSULATING PANEL OR SHEET AND A METHOD OF AND APPARATUS FOR MAKING THE SAME

  • US 3,720,558 A
  • Filed: 06/16/1969
  • Issued: 03/13/1973
  • Est. Priority Date: 06/16/1969
  • Status: Expired due to Term
First Claim
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1. A method of heat insulating a panel or sheet comprised of superimposed laminates of thermoplastic film material and metal foil bonded to said panel comprising the steps of:

  • a. simultaneously applying, to a surface of a moving panel, layers of a metal foil and a film of clear or transparent thermoplastic material, with the film being interposed between said panel and said foil so as to maintain said foil continuously out of contact with said panel, b. positioning a flexible sheet over the entire exposed surface of said foil on said moving panel, said sheet being longitudinally non-movable and assuming the surface configuration of said moving panel and layers. c. applying a continuous mass of deformable weight on the surface of said flexible sheet contacting said sheet against said foil thereby firmly pressing the entire surface of said foil and film layers against said panel, and d. heating said moving laminated panel to cause said thermoplastic film to adhere both to said foil and to said surface of said panel during the weight applying step thereby firmly bonding said foil to said panel.

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