US Patent 10293531 Method for manufacturing sealing device
Patent 10293531 was granted and assigned to nok (retail company) on May, 2019 by the United States Patent and Trademark Office.
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The object of the present invention is to effectively prevent the rust generation on a flange portion and to prevent the deformation of the flange portion due to the filling pressure of a molding material in the manufacture of a sealing device whereby a seal main body comprising a rubber-like elastic material and having a portion that covers both surfaces of the flange portion of a metal reinforcing ring is integrally formed on the reinforcing ring by means of a metal mold. To this end, the flange portion of the reinforcing ring is formed in advance with a shape which is distributed unevenly in the direction opposite the direction in which the flange portion is deformed from its original shape by the filling pressure of the molding material.
US Patent 10293531 Method for manufacturing sealing device
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