Patents Assigned to Racal Filter Technologies, Ltd.
  • Method for sealing the edge of a filter medium to a filter assembly and the filter assembly produced thereby
    Patent number: 5512172
    Abstract: Improved filter assemblies are provided having a pleated filter medium attached to a support frame utilizing an improved manufacturing method employing a welding process to seal the pleated edges of the filter medium to an inwardly protruding sealing means provided on the frame around the inside perimeter thereof, forming a final filter assembly exhibiting an essentially leak-proof edge seal.
    Type: Grant
    Filed: June 10, 1994
    Date of Patent: April 30, 1996
    Assignee: Racal Filter Technologies, Ltd.
    Inventor: Keith S. Marble