Method of forming at ambient temperatures annular seals in the c

Details Method of forming at ambient temperatures annular seals in the c Method of forming at ambient temperatures annular seals in the c

1990-04-09

1991-10-01

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

1561281, 156909, B29D 3056

Patent

active

050530941

ABSTRACT:
A method of retreading a stitched tire having a cushion layer of uncured rubber between its buffed surface and the undersurface of it uncured rubber curable at temperatures above 200.degree. F. utilizes tensioned bands including its margins of the tread material. The bands are of a prestressed, long chain synthetic polymer which becomes elastic with reduced tensile strength at temperatures above 200.degree. F. The bands are tensioned to an extent such that the underlying margins of the cushion layer are forced into such intimate contact with the buffed surface of the tire and the undersurface of the tread material as to form temporary gas impermeable seals at the interfaces and at the same time insure that, while the cushion layer is being cured at tempeatures above 200.degree. F., the tread material is held in place by the bands with a compressive force inadequate to cause extrusion of the cushion layer rubber in excess of a bead which is approximately one half the thickness of the cushion layer.

REFERENCES:
patent: 3925129 (1975-12-01), Blankenship
patent: 3989563 (1976-11-01), Schelkmann
patent: 4098936 (1978-07-01), Rawls
patent: 4174239 (1979-11-01), Symmes

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