Pneumatic radial tire with zigzag organic fiber cored belt layer
AssigneeThe Yokohama Rubber Co., Ltd.
InventorsTuneo Morikawa, Kazuyuki Kabe, Shuji Takahashi
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Abstract
A pneumatic radial tire is formed by disposing a single steel cord belt layer on the outer side of a carcass layer in a tread, and providing a cylindrical organic fiber cord belt layer of a double structure on the outer side of the steel cord belt layer by winding a tape, which is obtained by burying one or a plurality of organic fiber cords in parallel with each other in a matrix, around the steel cord belt layer while bending the tape zigzag.
Claims9
A pneumatic radial tire characterized in that a single steel cord belt layer is disposed on the outer side of a carcass layer in a tread, a cylindrical organic fiber cord belt layer of a double structure being formed on the outer side of said steel cord belt layer by winding a tape, which is obtained by burying one or a plurality of organic fiber cords in parallel with each other in a matrix, around said steel cord belt layer while bending said tape zigzag, said tire satisfying the relation expression tan .theta.=n.times.D/2.pi.r wherein .theta. represents an angle of the cords in said organic fiber cord belt layer with respect to the circumferential direction of said tire, D a width of said organic fiber cord belt layer, r a radius of said cylinder of said organic fiber cord belt layer, and n the number of zigzag bends of said tape per round of said tire, said relation being 8.degree.<.theta.<32.degree..
Dependencies are inferred from the claim text.