Method of producing a metal gasket
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United States of America Patent
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Jul 16, 1991
Issued Date -
N/A
app pub date -
Mar 16, 1990
filing date -
Nov 22, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of producing a metal gasket having at least a cooling water opening comprises steps of coating a surface treatment agent on an outer surface of the metal gasket, covering by a masking jig the outer surface of the metal gasket except a region surrounding the cooling water opening, and removing the surface treatment agent in the region by jetting superhigh pressure water at the region.
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