The Goodyear & Tire Rubber Company

Mathew Ray Cappelli

Frederick Forbes Vannan, Jr

William Allen Rex

Thomas Andrew Laurich

An improved tire,having precured tire tread,for mounting to an unvulcanized or a vulcanized tire casing,is disclosed. The improved precured tread,has a pair of circumferentially continuous projections,. One projection,extends axially outwardly from each of the lateral surfaces,of the tread. The rejection,provides a means for air tightly sealing the tread casing assembly at the lateral surfaces,during the vulcanization of the tread,to the casing,. The method of assembly includes placing the tread,and casing,in a smooth mold, closing the mold inflating a bladder expanding the casing,into the tread,, the tread,correspondingly expands effecting an air tight sealing of the tread,and the mold at the annular projections,of the tread,, applying heat and pressure causing a uniform flow of unvulcanized material radially outwardly along the tread edges. This invention provides uniform pressure distribution on the tire casing during curing. In this way belt package distortion is greatly minimized or eliminated. In another embodiment, a precured inner liner eliminates the need for an inflatable bladder.

Growing community of inventors

Canal Fulton, OH, United States of America

Mathew Ray Cappelli