Patents by Inventor Birger Edholm

Birger Edholm 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).

  • Process and an apparatus for die-cutting of packaging material
    Patent number: 5176613
    Abstract: A process and an apparatus for preventing a packaging material which is being die-cut and scored from developing cracks. A crack-reducing sheet material (17) is positioned between the cutting/scoring tools (9, 13) and the packaging material (5) to absorb impact energy from said tools and relieve the packaging material of crackproducing forces in the direction of its plane.
    Type: Grant
    Filed: July 5, 1991
    Date of Patent: January 5, 1993
    Inventors: Soren Cavlin, Birger Edholm