Abstract: A heat pad for pressing against a curved surface of an annular tire to vulcanize a tire patch having a channel-shaped sheet member of resilient conductive rubber material with reinforcing electrodes adhered to the sheet member at the elongated side edges, a cover of insulating rubber material encasing the sheet member and an intermediate portion between the electrodes stretchable to conform to the curved surface of the tire under pressure from a pressing member urging the pad against the tire.

Abstract: A tool tip is inserted from the inside of the tire into a hole in a tire crown by turning the tool tip as it is pressed against the tire. The tool tip is mounted on a hollow tool having a cylindrical insert receiving chamber. An insert is pushed by a plunger out of the receiving chamber in the hollow tool through a tapered portion into a compression chamber in the tool tip. The compression chamber has a diameter smaller than the diameter of the insert so that when the insert is ejected from the hollow tool it will expand to fill the hole in the tire. The insert is also tapered to engage the tapered portion between the receiving and compression chambers. The plunger has a plunger head with a substantially flat pushing surface and knurled edges which the operator can manually grip and push.

Abstract: A tire repair patch having at least one ply package enveloped by an unvulcanized base cushion gum layer and an unvulcanized top cushion gum layer joined at the edges of the ply package. The overlapping plies of reinforcing cords in the ply package are coated with rubber and are at least partially vulcanized prior to assembly of the patch to increase the strength of the patch and decrease the curing time upon application to a tire.The patch is made by coating the plies with rubber, laying the plies one on top of the other to form the ply package, heating the package to cure the rubber coating and then positioning the ply package between the unvulcanized cushion gum layers. An unvulcanized intermediate cushion gum layer may be positioned between two ply packages where there is more than one ply package in the patch.

Abstract: A tire sidewall repair patch having overlapping plies of reinforcing cords positioned in the patch. An inner margin of the patch has a concave edge which conforms generally to the shape of a bead portion of a tire. The side edges are connected to a generally convex outer edge to reduce edge pulling. The reinforcing cords are concentrated in the central portion adapted to cover the tire injury. Flexibility of the side portions at the inner margin is provided by reducing the number of plies extending into the side portions.

Abstract: A tire repair patch having overlapping plies of reinforcing cords, a base cushion gum layer and an intermediate cushion gum layer positioned between at least two of the plies. The intermediate cushion gum layer has a thickness greater than the thickness of the plies and suspends some of the plies for distributing the forces transmitted through the patch at the injured portion of the tire.