Method of manufacturing pneumatic tire and vulcanizing metal mold used for the method

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United States of America Patent

PATENT NO 6830722
APP PUB NO 20020185204A1
SERIAL NO

10089545

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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It is a method of manufacturing a pneumatic tire provided with a bead guard having an excellent appearance without forming spews and bare, wherein when a pneumatic tire (1) provided with a bead guard (5) of a trapezoidal shape at section is vulcanization-shaped in a split type mold (11) comprising a pair of annular side rings (13) and many divided segments (12) for the formation of a tread portion integrally united and engaged therewith, an edge (13-1 SE, 13-2iSE) of a dividing face (13-1S, 13-2iS) between mutually adjoining side ring pieces (13-1, 13-2) formed by annularly dividing a side ring (13) inward and outward in a radial direction with respect to a center axis line of the split type mold (11) and located at a side of a tire shaping face is positioned in a place corresponding to a depressing portion (15) forming a bead guard (5).

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Patent Owner(s)

  • BRIDGESTONE CORPORATION

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Matsunaga, Hiroo Kodaira, JP 7 23

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