Stitching ply edges into bead region
AssigneeSumitomo Rubber Industries, Ltd.
InventorEric Thomas Watson Fyfe
Life of this patent
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Abstract
A method of assembling a tire carcass comprising applying a cord reinforced rubber ply to a toroidal-shaped former such that the edges of the ply are located on radially inner portions of the former, placing a circular bead component adjacent to each edge and stitching each ply edge to its said circular bead component to secure the ply edge in the region of the tire bead.
Claims10
A method of forming a cured tire comprising tire components and a tire carcass, the method comprising assembling a tire carcass by (i) applying a cord reinforced rubber ply to a toroidal-shaped former such that the edges of the ply are located on radially inner portions of the former, (ii) placing a circular bead component comprising an inextensible bead hoop adjacent to each edge and (iii) stitching each ply edge of the cord reinforced rubber ply to its circular bead component by sewing or needling cord ends of the cord reinforced rubber ply to said inextensible bead hoop without forming a turn-up;
- and subsequently assembling tire components and the tire carcass to form a tire, and curing the tire.
A tire carcass comprising two spaced-apart bead regions, two sidewalls, a central tread region and a toroidal reinforcement ply comprising a rubber sheet reinforced by reinforcement cords wherein the reinforcement ply has in each bead region a ply edge which is located in its bead region by being attached by sewing or needling to a circular bead component adjacent to said edge without forming a turn-up, wherein the circular bead component is an inextensible bead hoop.
Dependencies are inferred from the claim text.