Patents Assigned to The Fiber-Metal Products Company
  • Welding mask corona barrier
    Patent number: 4354279
    Abstract: A corona barrier insert for a welding mask having a shield section and a main frame defining a viewing port in the shield section and a lens assembly including an outer pane made of glass and an inner pane of tinted glass to block out harmful rays. The corona barrier insert is made of a semi-rigid opaque plastic material and is of a configuration to engage in the frame defining the viewing port in a manner to block or prevent a corona or halo effect about the periphery of the lens stack.
    Type: Grant
    Filed: January 14, 1980
    Date of Patent: October 19, 1982
    Assignee: The Fiber-Metal Products Company
    Inventors: Eugene G. Walters, Jr., Heinz E. Ruck