Toyo Tire Rubber Co., Ltd.

Kenji Nakakura

Kietsu Maeda

Mitsuru Hitotsuyanagi

Katsuhiro Nakatani

A pneumatic tire has two or more carcass layers for reinforcing between a pair of annular beads. The pneumatic tire includes: (i) a region including or near a position having a tire maximum width, which region includes a radial region where cords constituting the carcass layers are arranged at an angle of 90&#xb1;10&#xb0; with respect to a circumferential direction; (ii) a region between the radial region and one of the beads close thereto, which region includes a bias region where cords in an upper layer and cords in a lower layer constituting the carcass intersect and are both arranged at an angle of 10&#xb0; to 60&#xb0; with respect to the circumferential direction; and (iii) a region between the radial region and a tire equator line, which region includes another bias region.

Pneumatic tire using carcass ply

A pneumatic tire includes two or more carcass layers for reinforcing between a pair of annular beads, and a reinforcing layer having a cord arranged on an outer peripheral surface of the carcass layer below a tread surface in a circumferential direction of a tire. The pneumatic tire has a flattening of 70% or less. The cord constituting the carcass layers are arranged substantially in a radial direction in a region of the tire from the bead to a position near a tire maximum width, and from that position to a grounding end. The angle with respect to a circumferential direction of the tire is gradually changed between 20&#xb0; and 60&#xb0; in the vicinity of the grounding end, and between 20&#xb0; and 50&#xb0; at the tread surface.

A carcass ply producing apparatus for producing a carcass ply constituting a carcass layer of a tire comprises

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Osaka, Japan

Kenji Nakakura