IMPROVED METHOD FOR SEALING THE EDGE OF A FILTER MEDIUM TO A FILTER ASSEMBLY AND THE FILTER ASSEMBLY PRODUCED THEREBY

摘要

Improved filter assemblies are provided having a pleated filter medium (23) attached to a support frame (20) utilizing an improved manufacturing method employing a welding process to seal the pleated edges of the filter medium to an inwardly protruding sealing means (22) provided on the frame (20) around the inside perimeter thereof, forming a final filter assembly exhibiting an essentially leak-proof edge seal.