Pneumatic tire and process for its manufacture
First Claim
1. A pneumatic tire comprising a tread surface and two separate side parts of an elastomeric synthetic resin, wherein the side parts not only form the side walls of the tire but each extends from a rim wire to the midline of the tire and therefore also forms the foundation for the tread surface of each side of the tire, characterized in that(a) the tread surface and a layer under the foundation of the tread surface consist of a tread surface elastomer and(b) the tread surface and layer under the foundation of the tread surface are joined through apertures in the foundation of the tread surface.
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Abstract
This invention relates to a pneumatic tire comprising a tread surface and two separate side parts of an elastomeric synthetic resin and optionally reinforcing elements, wherein the side part not only forms the side wall of the tire but extends from the rim wire to the mid-line of the tire and therefore also forms the foundation for the tread surface on one side, and to a process for the manufacture of such pneumatic tires.
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Citations
15 Claims
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1. A pneumatic tire comprising a tread surface and two separate side parts of an elastomeric synthetic resin, wherein the side parts not only form the side walls of the tire but each extends from a rim wire to the midline of the tire and therefore also forms the foundation for the tread surface of each side of the tire, characterized in that
(a) the tread surface and a layer under the foundation of the tread surface consist of a tread surface elastomer and (b) the tread surface and layer under the foundation of the tread surface are joined through apertures in the foundation of the tread surface.
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15. The process for the manufacture of pneumatic tires, characterized in that two separately produced side parts which may have armoring elements placed on the foundation of their tread surface, are positioned in a centrifugal mold and an elastomer is fed into the interior of the tire during rotation of the mold, which elastomer, due to apertures in the foundation of the tread surface formed by the side parts is also distributed in a cavity provided in the mold above the foundation for the tread surface, the said cavity having the shape of the tread surface which is to be formed.
Specification