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US 4,796,351 AGranted
Gaskets
AssigneeFlexitallic Limited
InventorColin Gee
Life of this patent
Estimating the term…
Abstract
An annealed, high tensile strength, heat hardenable metal strip is shaped into a spiral wound gasket profile prior to heat treating the strip to harden it and then winding it with a strip of sealing material into a spiral wound gasket.
Claims1
A method of making a spiral wound gasket having improved elastic recovery comprising the steps of:
- (1) profiling a strip of an annealed high tensile strength, precipitation hardening grade of alloy steel strip into a spiral wound gasket profile, followed by
- (2) heat treating the strip and thereafter
- (3) winding and interleaving it with a strip of a sealing material into a spiral wound gasket.
Dependencies are inferred from the claim text.