Patent ID: 7976028

Claim:
A non-asbestos gasket having: a core layer which is made of a metal plate, which is formed into a concentric or substantially concentric corrugated shape, which cooperates with expanded graphite-made surface layers that are stacked on front and back faces of said core layer, respectively, to form a three-layer structured sealing portion, and which is protruded from said front and back surface layers toward an outer diameter side in an outer circumferential end of said sealing portion; and wherein: said surface layers which are made of expanded graphite, which are stacked on the front and back faces of said core layer, respectively, are configured to be protruded from said core layer toward an inner diameter side in an inner circumferential end of said sealing portion, thereby covering said core layer; the three-layer structured sealing portion has a corrugated portion having a corrugated shape; and said three-layer structured sealing portion has: an inner-circumferential flange portion which is formed continuously with an inner diameter side of said corrugated portion, in which an outer diameter side end is positioned on an identical or substantially identical plane with one end in a thickness direction of said corrugated portion; the inner circumference flange portion is formed into a tapered face in a state where the tapered face is closer to a side remote from another side in the thickness direction as more advancing toward an inner diameter side end of the inner-circumference flange portion and the inner diameter side end is positioned on a side more remote from the another side in the thickness direction than the outer diameter side end; a first portion of said tapered face is at a first angle with respect to a vertical line; an end portion of said tapered face is at a second angle with respect to a vertical line; said second angle is greater than said first angle; and an outer-circumferential flange portion which is formed continuously with an outer diameter side of said corrugated portion.