The Standard Products Company

James Frederick Keys

An elongated extruded strip with a wire core having a selectively positioned neutral bending axis is made by coextruding an elastomeric extrudate at an elevated temperature about a wire core having adjacent parallel transverse wire lengths joined by low temperature threads having a melting point lower than the said elevated temperature while simultaneously feeding at least one high temperature thread into the extruder in bonding relationship to the elastomeric extrudate and in selected position therewith.

Extrusion with variable neutral axis wire core

A tire tread that is applicable to retread a worn tire carcass. The tire tread includes a cured tread portion having a first shoulder and a second shoulder. A first uncured wing portion extends from the first shoulder and a second uncured wing portion extends from the second shoulder. Further, an end section at each end of the tire tread portion is uncured. When the tire tread is wrapped around the tire carcass to be formed to the tire carcass and form a tire retread, the first and second wing portions extend down the side walls of the tire carcass and the uncured end sections of the tire tread contact each other. The tire carcass is placed within an autoclave, and the autoclave is heated under pressure such that the tire tread is cross-linked to the tire carcass. During the autoclaving step, the uncured wing portions are cured and cross-linked to the side walls of the tire carcass, and the uncured end portions are cured and cross-linked to each other. A mold segment is positioned within the tire tread pattern where the end sections of the tire tread meet in order to prevent the tire tread pattern from being damaged at the uncured end sections during the autoclaving process.

Tire tread

Tire tread with cured portion and uncured end sections/wing portions

There is disclosed a sealing device (7) comprising an elongate sealing portion (8) secured substantially along its length to an adhesive means (10) having an outer adhesive surface (11) remote from the sealing portion. The device further comprises a plurality of protruding members (12) positioned at predetermined intervals along its length and having a protruding end (15) protruding from the outer adhesive surface (11) of the adhesive means (10). The protruding members (12) comprise a flat portion (13) of small thickness opposite the protruding end (15). Also disclosed is a sealable body in which the sealing device is used and methods for forming the sealing device.

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St. Neots, United Kingdom

James Frederick Keys