Semperit Aktiengesellschaft

Erich Kresta

Werner Gorter

Horst Stumpf

The present invention relates to a pneumatic tire blank adapted to be vulcanized in a vulcanizing device of the kind not employing a bellows arrangement, but having a clamping system which acts upon the interior of the bead.

Pneumatic tire blanks and process

A tire blank for a vehicle tire provided at its bead region or surface with a pre-vulcanized ply or a ply formed of a harder rubber mixture than the rubber mixture generally employed at the bead region. Each bead region of the tire blank possesses one such ply at its inner surface, and both plies are arranged at a spacing from one another.

Tire blank for a vehicle tire with tire bead ply means and improved

A method of fabricating molded articles composed of elastomeric material having embedded therein essentially oriented fibers, comprising the steps of fabricating a molded article with oriented fibers therein, positioning the molded article within a mold having two portions, a first mold portion defining the shape of the final molded article and a second mold portion arranged separately of said first mold portion and in communication therewith, said molded article being positioned partly in said first mold portion and partly in said second mold portion, subjecting the part of the molded article positioned in said second mold portion to a directed flow operation into said first mold portion and reorienting by said directed flow operation the fibers subjected to flow into a second fiber orientation direction differing from the fiber orientation direction of the part of said molded article positioned in said first mold portion.

Method of making a molded article with oriented fiber reinforcements

A molded article, especially a tire, comprising an elastomeric material and essentially oriented fibers embedded in said elastomeric material, said molded article including at least two sections containing such fibers, wherein said fibers of said sections, with said sections viewed projected into substantially a common plane, possess respective orientation directions differing from one another, and wherein said sections possess respectively different strength characteristics owing to the respective different fiber orientation directions of said two sections. There is also disclosed a method and apparatus for forming such molded articles wherein there is provided a hollow mold having a mold compartment, and means define at least one auxiliary compartment provided for said hollow mold. The hollow mold includes at least one mold section constructed to be movable to displace molding material containing the fibers and use for forming the article into a part of the hollow compartment of said mold which is initially free of molding material.

Growing community of inventors

Perchtoldsdorf, undefined

Erich Kresta