Stock material or miscellaneous articles – Composite – Of natural rubber
Patent
1978-03-20
1979-09-04
Kittle, John E.
Stock material or miscellaneous articles
Composite
Of natural rubber
152330R, 152349, 152374, 156272, 156123R, 20415918, B29H 500
Patent
active
041668839
ABSTRACT:
The inner surface of a green tire provided with an air-sealing liner, is cured or partially cured to produce a steam- and water-resistant surface, and the tire after such treatment is cured in a usual press without an air-bag or bladder.
One or more plies of a tire, usually the outer fabric plies, are partially cured before assembly in the tire, to insure that plies so located are cured, without over-curing inner and outer portions of the tire.
New tires are made by placing a carcass, whether green or partially cured, in a mold and extruding rubber over the outer surface of this carcass to fill the mold, and then giving the final cure to the resulting tire.
Tires are retreaded by applying ribbons of tread stock over the carcass prepared in any conventional manner, and then completing the cure without the use of a mold.
Retreaded tires are cured by placing a carcass prepared in any conventional manner, in a mold, extruding tread stock into the mold around the carcass, and then curing.
A tire, the inner surface of which is provided with a non-cured liner reinforced with a non-wicking fabric is cured without an air-bag or bladder.
Curing or partial curing may be effected by electron irradiation. Progressive irradiation is disclosed by which an object is repeatedly irradiated to attain a desired cure. Other methods of curing may be preferable in some operations.
REFERENCES:
patent: 1289771 (1918-12-01), Hopkinson
patent: 1906402 (1933-05-01), Newton
patent: 2645265 (1953-07-01), O'Neil
patent: 2776699 (1957-01-01), Kindle et al.
patent: 2933441 (1960-04-01), Mallon
patent: 3027289 (1962-03-01), Gitzinger
patent: 3372078 (1968-03-01), Fausti et al.
patent: 3372078 (1958-03-01), Fausti et al.
patent: 3933553 (1976-01-01), Seiberling
patent: 3933566 (1976-01-01), Seiberling
"Atomic Radiation and Polymers", Charlesby, pp. 25, 278-289, Pergamon Press, 1960.
"Vanderbilt Rubber Handbook", pp. 374-375, 1958.
"Rubber Chemistry and Technology", 1963, vol. 36, pp. 248-249, 256, 257 and 1965 edition, vol. 38, pp. 94-95, 102.
"Laboratory Tests for Studing Factors Attecting Cord Strike-Through in Tubeless Tires", by Hubbard, et al., Exxon Chemicals, Toronto, Ontario, May 10, 1974.
"Rubber and Plastics News", Nov. 28, 1977, pp. 14-17, Robert C. Becker.
Kittle John E.
Meyer Harold S.
Seiberling Mildred Kelley
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