| 摘要 |
The metal core used for reinforcing tire beads is consti= tuted by a plurality of coils of wire (16), (17), (18), axially arranged side-by-side and radially superimposed, in which the wire has a straight section of modular shape with two equal and parallel opposite sides (1), (2), the profiles (15) connecting the corresponding ends of the opposite sides having a distance, from the axis of said pair of si?es, whose value varies from one side to the other, said variation comprising at least one inversion of value along the development of the profile. FIGURE 6
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