Patents Assigned to Chave & Earley, Inc.
  • Filter medium
    Patent number: 4211661
    Abstract: A method and apparatus of producing a filter medium of a relatively strong substrate and a fibrous felt layer bonded to the substrate by needle punching the felt through the substrate and fusing the fibers protruding through the perforations to the substrate and each other.
    Type: Grant
    Filed: January 8, 1979
    Date of Patent: July 8, 1980
    Assignee: Chave & Earley, Inc.
    Inventor: Gerald N. Perry