Metal tire bead manufacturing method
AssigneeBridgestone Corporation
InventorKarl J. Siegenthaler
Life of this patent
Estimating the term…
Abstract
To form a metal bead for a tire, two integral portions of a single length of wire are wound in opposite directions about an axis to form a bundle; and the free ends of the two portions are positioned substantially coaxially and adjacent to each other along the outer periphery of the bundle, and are connected integrally to each other to form a bead with a substantially constant section along its whole length.
Claims11
A method of manufacturing a metal bead for a tire, the bead (1) comprising a bundle (2) in turn comprising a length (3) of wire wound substantially into a coil about an axis (4) to impart a toroidal shape to the bundle (2);
- and the method comprising the steps of determining an intermediate point (9) along said length (3) of wire, to define, on the length (3) of wire, two portions (5, 6), each of which comprises a first free end (7) and a second end (8) integral with the second end (8) of the other portion (6, 5) at said intermediate point (9);
- placing said intermediate point (9) on an outer periphery (21) of a substantially cylindrical forming core (17) coaxial with said axis (4);
- winding said two portions (5, 6) substantially into a coil and in opposite directions about said core (17) to define the bundle (2) and position said two first ends (7) at an outer periphery (10) of the bundle (2);
- and connecting said two first ends (7) integral with each other.
Dependencies are inferred from the claim text.