Invention Application
- Patent Title: PNEUMATIC TYRE AND MANUFACTURING METHOD THEREFOR
- Patent Title (中): 气动轮胎及其制造方法
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Application No.: US14356532Application Date: 2012-11-22
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Publication No.: US20150053326A1Publication Date: 2015-02-26
- Inventor: Naoki Sugiyama , Tomoharu Torii
- Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.
- Priority: JP2011-274779 20111215
- International Application: PCT/JP2012/080311 WO 20121122
- Main IPC: B60C15/04
- IPC: B60C15/04 ; B29D30/48

Abstract:
The present invention has an object of providing a pneumatic tire that exhibits better uniformity by improving the wire wound body for constituting the bead core. The pneumatic tire 1 comprises a bead core 5 comprising a wire wound body 10 in which one bead wire 10a is spirally wound in a continuous around a tire rotational axis CL so that a plurality of layers of the bead wire are formed in a radial direction of the tire. The wire wound body 10 comprises a first part 13 and a second part 14. The first part 13 comprises a plurality of layers of the bead wire 10a each circumferentially extending with a constant radius from the tire rotational axis CL. The second part comprises a plurality of layers of the bead wire 10a each circumferentially extending while changing its radius from the tire rotational axis CL.
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