Patents Examined by Nanda L. Millard
  • Filter apparatus having a bag with a gasket
    Patent number: 5039410
    Abstract: A filter apparatus having a bag filter subassembly for collecting contaminating material. The bag filter subassembly includes a bag filter having a top end portion and a gasket ring having a groove receiving the top end portion. The gasket ring is a molded article, composed of a polyurethane composition. The groove has opposite sidewalls with molded protrusions caused by recesses in the top end portion. The recesses can be microscopically small, depending upon the fabric of the filter bag.
    Type: Grant
    Filed: April 2, 1990
    Date of Patent: August 13, 1991
    Assignee: GAF Chemicals Corporation
    Inventor: Moshe Gershenson