Patents by Inventor Harald Blomgvist

Harald Blomgvist 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 of manufacturing shrinkable sleeves from a cross-linking plastics material
    Patent number: 4321292
    Abstract: The present invention discloses an improved heat shrinkable sleeve and method for making same in which an extruded sleeve piece is heated above the cross-linking temperature of the plastics material by immersing it in a heated bath while supporting its shape by fixed tubes and then expanding the sleeve piece while it is simultaneously cooled by means of a pair of rotating rolls which are movable away from each other.
    Type: Grant
    Filed: June 23, 1980
    Date of Patent: March 23, 1982
    Assignee: Oy Wiik & Hoglund AB
    Inventor: Harald Blomgvist