초록 ▼

A gasket which is compression-failure resistant, even at operating flange pressures in the range of from about 3,000 to about 15,000 PSI and also has a good sealing ability, comprises a soft gasket material having two opposed, facial surfaces and an aperture with an edge perpendicular to the facial

A gasket which is compression-failure resistant, even at operating flange pressures in the range of from about 3,000 to about 15,000 PSI and also has a good sealing ability, comprises a soft gasket material having two opposed, facial surfaces and an aperture with an edge perpendicular to the facial surfaces, wherein the edge of the aperture has a polymer coating (coating A) on the edge for a good sealing ability. In this embodiment, except for coating A, the gasket is otherwise not coated which makes the gasket compression-failure resistant. In embodiments which need even better sealing ability, at least one of the opposed, facial surfaces has polymer coating B, which may abut both the edge and polymer coating A, wherein polymer coating B on the facial, opposed surface leaves the gasket uncoated for sealing ability in an amount effective to give the gasket compression failure resistance.

대표청구항 ▼

[ We claim:] [1.]1. A gasket comprising:a base sheet of substantially planar contiguous gasket material having a predetermined thickness and two opposed substantially parallel faces;said base sheet being configured to define at least one interior aperture bounded by a relatively porous edge of said

[ We claim:] [1.]1. A gasket comprising:a base sheet of substantially planar contiguous gasket material having a predetermined thickness and two opposed substantially parallel faces;said base sheet being configured to define at least one interior aperture bounded by a relatively porous edge of said base sheet;an edge coating disposed on said relatively porous edge of said base sheet, said edge coating at least partially penetrating said relatively porous edge and being formulated and configured to provide an enhanced seal when said gasket is compressed between a pair of flange surfaces;said opposed faces of said base sheet lying in respective spaced apart facial planes and said edge coating having edge portions adjacent said facial planes, a central portion intermediate said facial planes, a thickness in a direction substantially parallel to said facial planes, and a width in a direction substantially perpendicular to said facial planes;a face coating on a portion of at least one face of said base sheet, said face coating extending in a strip around said aperture and having a thickness and a width;said face coating covering less than about 30% of said face.