Patents by Inventor Karl O. Dassler

Karl O. Dassler 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).

  • Environmental retained tab ends
    Patent number: 4579495
    Abstract: This invention relates in general to new and useful improvements to easy opening container ends. More particularly, it relates to a new improved method of forming a hinged connection between a tab and an end panel.
    Type: Grant
    Filed: January 8, 1982
    Date of Patent: April 1, 1986
    Assignee: American Can Company
    Inventors: Karl O. Dassler, Neal E. Langseder
  • Retained ring tab
    Patent number: 4372462
    Abstract: A retained ring type lever tab for easy open containers. The tab is provided with two dog leg levers which join at the forward end to form a triangular nose. These levers which in cross section are made up of a pair of parallel flanges 0.050" in width connected by an outer curl of radius 0.030" are particularly effective in transferring the opening force to the displaceable panel in the end. The tab is characterized by a low weight and a high mechanical advantage.
    Type: Grant
    Filed: May 12, 1981
    Date of Patent: February 8, 1983
    Assignee: American Can Company
    Inventors: Karl O. Dassler, Neal E. Langseder