Patent ID: 7641751
Filing Date: 2010-01-05
Classification: B29D

Abstract:
1. A producing method of a pneumatic tire in which at least one side of a sidewall portion is formed with a second color portion of second color that is different from that of a main body rubber of first color, the producing method comprising steps of: winding a rubber ribbon of the first color along a circumferential direction of the tire a plurality of times, thereby forming a first color sidewall rubber; providing a concave groove extending in the circumferential direction of the tire in a region where the second color portion is formed in the first color sidewall rubber; fitting a second color rubber extrudate of the second color which is monolithically extruded such that said extrudate fits into the concave groove and winding the same along the circumferential direction of the tire once; winding a rubber sheet of the first color along the circumferential direction of the tire once to cover the second color rubber extrudate with the rubber sheet, and partially cutting down the rubber sheet to expose the second color rubber extrudate to form the second color portion, wherein when the second color rubber extrudate is covered with the rubber sheet, projections provided on a covered surface of the rubber sheet are opposed to edges of the concave groove.