Method for retreading a tire

Details Method for retreading a tire Method for retreading a tire

2006-10-31

2006-10-31

Knable, Geoffrey L. (Department: 1733)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S128100

Reexamination Certificate

active

07128794

ABSTRACT:
The invention is a method for retreading a tire comprising the step of using a supercritical fluid as a carrier to spray a gum cushion layer on the outer surface (radially outermost) of the carcass of a tire. In a preferred embodiment of the invention, the supercritical fluid is carbon dioxide. In one embodiment of the invention, the supercritical fluid is a mixture of a rubber product, a solvent, and a supercritical fluid carrier. In another embodiment of the invention, the gum cushion rubber delivered by the supercritical fluid forms a layer less than 300 microns thick between the new tread and the upper surface of the carcass of the tire after curing. In another embodiment of the invention, the gum cushion layer is delivered to the carcass by means of a supercritical fluid as a dual solution system, composed of one solution without sulfur, and one solution without accelerator.

REFERENCES:
patent: 1537866 (1925-05-01), Morton
patent: 1777960 (1930-10-01), Cadwell
patent: 2560040 (1951-07-01), Whipple
patent: 3198680 (1965-08-01), Iknayan
patent: 4051090 (1977-09-01), Horowitz et al.
patent: 5066522 (1991-11-01), Cole et al.
patent: 5279784 (1994-01-01), Bender et al.
patent: 5807918 (1998-09-01), Carter

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