Method of manufacturing metallic gaskets

Details Method of manufacturing metallic gaskets Method of manufacturing metallic gaskets

1989-03-24

1990-10-23

Larson, Lowell A.

Metal deforming

Process

Deforming sheet metal

29446, 277213, B21K 300

Patent

active

049642936

ABSTRACT:
This invention discloses the method of manufacturing metallic gaskets which are properly prestressed by a load which is determined according to a stress calculation. In the process of applying prestresses to the gaskets, a die formed to a thickness smaller than the thickness of the metallic gasket material--which has a bead portion and is coated with resin such as a fluoroelastomer--is placed close to and surrounding the outer circumference of the metallic gasket material or inside the holes formed in the metallic gasket material. Then, the tension side of the bead portion of the metallic gasket material is prestressed by a stress greater than a specified stress that will occur when the metallic gasket is used.

REFERENCES:
patent: 3304761 (1967-02-01), Herzog
patent: 4203608 (1980-05-01), Nicholson et al.
patent: 4331336 (1982-05-01), Czernik et al.
patent: 4829799 (1989-05-01), Coe et al.

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