Tread for the recapping of tires and method of making the same
AssigneeVakuum Vulk Holdings Ltd.
InventorWilhelm Schelkmann
Life of this patent
Estimating the term…
Abstract
A tread for the recapping of tires is provided with a roughened internal surface simultaneously with the shaping of profile on its external surface in a vulcanizing form. The internal surface can be roughened by placing against the body of raw rubber in the form of a latticework, a plate with regularly or irregularly distributed projections or a composite deforming structure. The internal surface of the prefabricated tread can be sealed from the atmosphere by a foil which is applied to the internal surface directly in the form or subsequent to removal of tread from the form.
Claims17
As a novel article of manufacture, a prefabricated tread for use in tire-recapping methods of the type wherein a bonding layer of unvulcanized rubber is inserted intermediate and pressed between the inner surface of a prefabricated tread and the outer surface of a tire carcass at a temperature high enough to cause the unvulcanized rubber of the bonding layer to flow into intimate contact with said surfaces and become vulcanized to effect permanent bonding of the prefabricated tread to the carcass, the novel prefabricated tread being a molded one-piece structure having a profiled external road-engaging surface and having an internal surface substantially completely covered with a crowded network of molded projections and recesses presenting to the unvulcanized rubber of such a bonding layer a large contact surface and a multitude of cavities into which the unvulcanized rubber of such a bonding layer can flow during the performance of such permanent-bonding method.
Dependencies are inferred from the claim text.