Title:
PNEUMATIC TIRE AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2014/073303
Kind Code:
A1
Abstract:
A pneumatic tire that reduces separation of carcass ply from internal/external core pieces (5i, 5o), and improves handling stability. A carcass ply radial direction inner end section is sandwiched between the internal/external core pieces (5i, 5o) without being folded back by the rotation of a bead core. The internal/external core pieces (5i, 5o) comprise spiral bodies of bead cord (10i, 10o) that have wound up into a spiral shape as a result of the rotation of the tire shaft core. In the internal core piece (5i), the final twisting direction of the bead cord (10i) is in the same direction as the winding direction of the tire shaft core rotation for the bead cord (10i) in the side surface view from the outside in the tire shaft direction. In the outside core piece (5o), the final twisting direction of the bead cord (10o) is in the opposite direction to the winding direction of the bead cord (10o).
Inventors:
KOHARA KEI (JP)
Application Number:
PCT/JP2013/077132
Publication Date:
May 15, 2014
Filing Date:
October 04, 2013
Export Citation:
Assignee:
SUMITOMO RUBBER IND (JP)
International Classes:
B60C15/00; B29D30/10; B60C9/00; B60C15/04
Foreign References:
| JPH10305710A | 1998-11-17 | |||
| JP2006327318A | 2006-12-07 | |||
| JP2006044339A | 2006-02-16 | |||
| JP2006160236A | 2006-06-22 | |||
| JP2010115957A | 2010-05-27 | |||
| JP2012126299A | 2012-07-05 | |||
| JP2006160236A | 2006-06-22 |
Other References:
See also references of EP 2910390A4
Attorney, Agent or Firm:
SUMITOMO Shintaro (JP)
Shintaro Sumitomo (JP)
Shintaro Sumitomo (JP)
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