PNEUMATIC TYRE AND MANUFACTURING METHOD THEREFOR

Title:

PNEUMATIC TYRE AND MANUFACTURING METHOD THEREFOR

Document Type and Number:

WIPO Patent Application WO/2013/088936

Kind Code:

A1

Abstract:

The uniformity of a tyre is enhanced by improving the shape of the wire winding forming the bead core. The bead core (5) of a pneumatic tyre (1) comprises a wire winding (10) having a plurality of bead wire (10a) layers formed in the radial direction of the tyre by winding a single bead wire (10a) several times around the rotational axis (CL) of the tyre in a spiraling fashion. The wire winding (10) has a first portion (13) and a second portion (14). The first portion (13) has a plurality of bead wire (10a) layers extending in the circumferential direction of the tyre at a fixed radius (R) from the rotational axis (CL) of the tyre. The second portion (14) has a plurality of bead wire (10a) layers extending in the circumferential direction of the tyre at radii (R) which vary in distance from the rotational axis (CL) of the tyre.

Inventors:

SUGIYAMA NAOKI (JP)
TORII TOMOHARU (JP)

Application Number:

PCT/JP2012/080311

Publication Date:

June 20, 2013

Filing Date:

November 22, 2012

Export Citation:

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Assignee:

SUMITOMO RUBBER IND (JP)

International Classes:

B60C15/04; B60C15/00

Foreign References:

JP2003146027A	2003-05-21
JPH0367709A	1991-03-22
JPH06156024A	1994-06-03
JPH0616018A	1994-01-25
JP2005335081A	2005-12-08
JP2006160236A	2006-06-22

Other References: