Patents by Inventor Tonny E. Bergqvist

Tonny E. Bergqvist has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for manufacturing a foamed plastic laminated panel
    Patent number: 5021108
    Abstract: An apparatus for manufacture of laminated panels having a foamed plastics core material includes an inclined press having a fixed platen surface and a movable platen surface hinged adjacent its lower edge. Panel thickness is adjustable by a mechanism which moves the hinge pivot relative to fixed platen surface. The platen surfaces are clamped at their upper edges by spaced clamps operable by lever and crank assemblies. A retractable seal spacer has liquid plastics injection nozzles and gas venting tubes in fluid communication with a hollow cavity in the press.
    Type: Grant
    Filed: May 22, 1989
    Date of Patent: June 4, 1991
    Assignee: Coral Irene Bergqvist
    Inventor: Tonny E. Bergqvist