| 摘要 |
A method of forming a ply member such as a carcass ply for a radial tire, wherein the ply member is formed from a plurality of belt-shaped members (6) having a width obtained by multiplying pi inches by an integral number (1, 2, 3, ...) and a constant length. These belt-shaped members are successively attached one by one onto a forming drum (1) having an outer circumferential length obtained by multiplying pi inches by an integral number so that the side edges of the belt-shaped members are arranged in parallel with the axis of the forming drum. The adjacent side edges of the belt-shaped members in circumferential directions of the forming drum are forced closer together to butt-join the faces of the side edges with each other. In the case that the forming drum (1) is a polygonal cylindrical forming drum whose one side of the polygon has a length obtained by multiplying pi inches by an integral number, the belt-shaped members are more easily attached to the forming drum. <IMAGE> |
