Reinforcing And Aggregate Patents (Class 425/DIG122)
  • Patent number: 3999929
    Abstract: The discharge device of this invention serves to receive axially compressed radially self-sustaining tubular duct in a cartridge form substantially shorter than the fully extended length of the duct and has a restraining collar on an exit end of the discharge device which effects a hoop tension on the compressed core during its passage from the exit end of the device to apply a controlled frictional drag ensuring that the core upon discharge is in a fully extended condition.
    Type: Grant
    Filed: November 13, 1974
    Date of Patent: December 28, 1976
    Assignee: The Wiremold Company
    Inventor: Norman J. Perusse