Method of forming self-sealing tire body composite for tires
AssigneeThe Firestone Tire & Rubber Company
InventorGeorg G. A. Bohm
Life of this patent
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Abstract
A tubular and generally circular self-sealing tire body composite and method of making the same for use in the construction of tires (for example, radial) having at least a spliceless innerliner layer and a spliceless sealant layer. Desirably, the sealant layer is shorter than the innerliner layer and is centered with respect thereto. The tubular composite can be made by utilizing an innerliner stock and a sealant stock, forming layers therefrom and contiguously contacting said layers to form a contiguous, tubular and generally circular article for subsequent use in building a tire. Additionally, a ply stock may be used, formed into a layer with cord incorporated therein, and contiguously applied to said innerliner layer.
Claims17
A method for forming a self-sealing tire with a seamless tubular innerliner layer and a seamless sealant layer therein, comprising the steps of:
- extruding at least one seamless tubular innerliner layer,
- extruding at least one tacky seamless sealant layer of a finite length in a longitudinal direction,
- extruding said seamless sealant layer about the entire circumference of said tubular innerliner layer,
- simultaneously coextruding said tubular innerliner layer and said sealant layer,
- contiguously contacting said innerliner layer and said sealant layer, and
- extruding said contiguous sealant layer and said innerliner layer into a spliceless tubular self-sealing composite at a diameter so that a tire can be made therefrom.
A method for the manufacture of a pneumatic tire having a seamless self-sealing layer and a seamless innerliner layer, comprising the steps of:
- extruding at least one self-sealing tacky seamless layer of a finite length in a longitudinal direction,
- extruding at least one seamless tubular innerliner layer,
- extruding said seamless sealant layer about the entire circumference of said tubular innerliner layer,
- simultaneusly extruding said seamless tubular innerliner layer and said seamless sealant layer,
- contiguously contacting said innerliner layer with said sealant layer,
- extruding said contiguous sealant layer and said tubular innerliner layer into a spliceless tubular self-sealing composite at a diameter so that a tire can be made therefrom,
- assembling an unvulcanized tire in a toroid shape, said tire having self-sealing tubular composite therein, and
- vulcanizing said tire to form a tire.
Dependencies are inferred from the claim text.