Patent ID: 7857025
Filing Date: 2010-12-28
Classification: B29D,B60C,Y10T

Abstract:
1. A pneumatic tire provided with a belt layer composed of a plurality of strip pieces each of which is formed by pulling together and rubberizing a plurality of steel cords, wherein, when a width of the respective strip pieces, an applicable number of the strip pieces, a cord angle of the belt layer with respect to a circumferential direction of the tire, and a circumferential length of the belt layer are respectively denoted by A, N, θ, and L: an integer satisfying (N+1)×A/sin θ>L>N×A/sin θ is selected as the applicable number N; and the belt layer is completely formed by aligning the N strip pieces in the circumferential direction of the tire with equal spaces disposed between adjacent ones of these N strip pieces such that there is no overlap between adjacent strip pieces.