Patents by Inventor Darrell L. Burkeen

Darrell L. Burkeen 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).

  • Heat sealing member for making contoured heat seals
    Patent number: 5149943
    Abstract: The heat sealing wire of an impulse heat sealer is held against an operating face of a support bar by an insulating fabric which is draped over the wire and secured in a slot formed in the support bar. The securing drape of fabric allows unrestricted expansion and contraction of the hot wire. Also if the slot lies in a curved plane which extends perpendicular to the plane of the support bar operating face, the drape of insulating fabric and consequently the sealing wire follow the same curve so the heat sealer can make seals of a non-linear configuration.
    Type: Grant
    Filed: January 8, 1992
    Date of Patent: September 22, 1992
    Assignee: Viskase Corporation
    Inventors: Vytautas Kupcikevicius, Philip F. Cilia, Darrell L. Burkeen