Patents by Inventor Edward E. Sweeney

Edward E. Sweeney 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).

  • Automatic control of bubble size in blown film
    Patent number: 4355966
    Abstract: A system of automatically controlling the size of thermoplastic blown film to minimize scrap generation by guiding the bubble at an elevation above the melting point of the bubble, to keep it centered above the extrusion die, sensing when the bubble is too wide or too narrow and automatically actuating a means to selectively remove or deliver gas or air to or from the bubble to return the bubble to the predetermined desired diameter of width and sensing when the predetermined diameter or width is obtained.
    Type: Grant
    Filed: May 4, 1981
    Date of Patent: October 26, 1982
    Assignee: E. B. Westlake, Jr.
    Inventors: Edward E. Sweeney, Paul N. Magowan