Patents Assigned to Wickeder Westgalenstahl GmbH
  • Composite shadow mask
    Patent number: 5863681
    Abstract: A shadow mask of two different metals which are cold rolled into adhesion with the shadow mask made from a first metal having a coefficient of thermal expansion on the order of glass and a second metal having a coefficient of thermal expansion substantially greater than glass with the first metal forming a framework for holding the second metal in position even though the temperature of the first and second metals is elevated.
    Type: Grant
    Filed: September 19, 1996
    Date of Patent: January 26, 1999
    Assignee: Wickeder Westgalenstahl GmbH
    Inventor: Klaus-Peter Helmetag