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US 5,380,384 AGranted
Method of forming green tire
AssigneeBridgestone Corporation
InventorsToshio Tokunaga, Naomichi Soga, Haruo Kawashima
Life of this patent
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Abstract
Bead wires 4 are set at both ends of a carcass ply 2, to form bead portions 5 and 5. Then, a carcass body 6a incorporated with a toroidal BT band 9 around the outer periphery portion is mounted on a forming drum 13 around which side rubbers 20 are mounted through bladders 16 and 17 at the positions corresponding to the bead portions 5 and 5. Thus, by expansion of the bladders 16 and 17, the side rubbers 20 are press-contacted with both the sides of the carcass body 6a.
Claims3
A method of forming a green tire comprising:
- setting bead wires at both ends of a cylindrical carcass ply on a first forming drum, and forming a carcass body having bead portions;
- positioning a BT band formed in a separate process over an outer peripheral portion of said carcass body on said first forming drum, and deforming said carcass body into a toroidal shape, and incorporating said carcass body with said BT band;
- mounting said carcass body incorporated with said BT band onto a second forming drum around which side rubbers are wound through bladders at positions corresponding to said bead portions at both the ends of said carcass ply while keeping the shape of said carcass body;
- and
- expanding said bladders for press-bonding said side rubbers on both the ends of said carcass body.
2 more elements
Dependencies are inferred from the claim text.