Manufacturing method of pneumatic tire
AssigneeToyo Tire & Rubber Co., Ltd.
InventorKazuma Nishitani
Life of this patent
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Abstract
A double-layer rubber ribbon in which at least one surface of an outer surface is configured by a sheet-like thin rubber ribbon is formed by co-extruding a different color rubber ribbon having a second color different from a side rubber of a first color and the thin rubber ribbon. Further, the double-layer rubber ribbon is wound for one or more turns along a tire circumferential direction in such a manner that the thin rubber ribbon is positioned close to a carcass side. Thereafter, the wound double-layer rubber ribbon is covered by a cover rubber having the first color, and the different color rubber ribbon is exposed by scraping off a portion corresponding to a letter or a line of the cover rubber.
Claims4
A manufacturing method of a pneumatic tire in which a letter or a line of a second color different from a side rubber of a first color is formed in a side wall portion in at least one side, the method comprising the steps of:
- forming a double-layer rubber ribbon in which at least one surface of an outer surface is configured by a sheet-like thin rubber ribbon, by co-extruding a different color rubber ribbon having the second color and the thin rubber ribbon;
- winding the double-layer rubber ribbon for one or more turns along a tire circumferential direction in such a manner that the thin rubber ribbon is positioned close to a carcass side;
- and
- covering the wound double-layer rubber ribbon by a cover rubber having the first color, and exposing the different color rubber ribbon by scraping off a portion corresponding to the letter or the line of the cover rubber.
Dependencies are inferred from the claim text.