| 摘要 |
A bead filler material having a generally toric shape is produced by winding and laminating a ribbon-like rubber strip. In conjunction with completing the production of the bead filler material, in order to form linear grooves radially extending on a surface of one side of the bead filler material in the thickness direction and contributing to smooth discharge of air, the ribbon-like rubber strip is helically winded and laminated around a bead core which is concentrically arranged on a rotatable base, thereby transferring radially extending linear projections provided on the rotatable base to a surface of the bead filler material contacting the rotatable base to form the linear grooves over the whole circumference of the bead filler material.
|
