Patent ID: 6626439
Filing Date: 2003-09-30
Classification: F16J

Abstract:
A gasket comprising:a base sheet of contiguous substantially porous gasket material having a predetermined thickness and two opposed substantially parallel and exposed faces for contacting respective flange surfaces between which said gasket is to be clamped; said base sheet being configured to define at least one aperture bounded by an interior edge of said base sheet; an edge coating disposed on said interior edge of said base sheet, said edge coating being formulated and configured to provide an enhanced seal when said gasket is compressed between a pair of flange surfaces, said edge coating penetrating said interior edge to form an intrusion zone of said base sheet surrounding said aperture, said intrusion zone having a width, said edge coating having a thickness in a direction transverse to said interior edge of said base sheet; said edge coating penetrating said interior edge a sufficient distance such that said width of said intrusion zone is at least twice said thickness of said edge coating, the region of said base sheet within said intrusion zone being denser as a result of said penetrating edge coating than regions of said base sheet outside said intrusion zone to enhance clamping pressure in said intrusion zone when said gasket is clamped between a pair of flange surfaces.