Patents by Inventor Karl H. Horn

Karl H. Horn 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).

  • Foil mask stretching apparatus and process
    Patent number: 4772238
    Abstract: An apparatus and a process is disclosed for use in the manufacture of a color cathode ray tube having a tensed foil shadow mask with a central apertured area and an unapertured border. The apparatus, which provides for thermally expanding an in-process shadow mask, includes a pair of heated platens for embracing a mask. At least one of the platens has a recess therein with width and length dimensions no less than the apertured area such that migrant particles trapped between the platens cannot damage the apertured area.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: September 20, 1988
    Assignee: Zenith Electronics Corporation
    Inventors: Karl H. Horn, Paul Strauss