Patents by Inventor Karl Dean Knight

Karl Dean Knight 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).

  • Manufacture of valves for inflatable articles
    Patent number: 5733406
    Abstract: Valve making apparatus heat seals valve films together, and cools the resulting product web. Valves are preferably formed in two side-by-side serial arrays, with each operation of a valve die forming multiple balloon valves, including a portion of a balloon valve to be completed on a subsequent operation of the sealing die. A tension control and web conveyor are also disclosed.
    Type: Grant
    Filed: October 2, 1995
    Date of Patent: March 31, 1998
    Assignee: M & D Balloons, Inc.
    Inventor: Karl Dean Knight