Process for the vulcanization of innertubes, and innertubes vulc

Details Process for the vulcanization of innertubes, and innertubes vulc Process for the vulcanization of innertubes, and innertubes vulc

1975-07-03

1977-05-10

Thurlow, Jeffery R.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

152349, 264100, 264236, 264345, 264347, B29H 501

Patent

active

040226450

ABSTRACT:
Process for open vulcanization of innertubes wherein the completed green tube with valve and valve stem installed is folded and arranged on a surface with rods from about 13 to about 25 mm in diameter inserted in the folded ends. Air amounting to from about 7.5% to about 12.5% of the nominal fully inflated volume of the tube is injected and the thus-arranged and partially-inflated tube is exposed to open air or open steam curing at a temperature in the range of from about 150.degree. to about 190.degree. C. The resulting tube has edges and end folds of increased radius of curvature minimizing subsequent fatigue or flex cracking in service.

REFERENCES:
patent: 545118 (1895-08-01), Young
patent: 596819 (1898-01-01), Moseley
patent: 1340704 (1920-05-01), Dech
patent: 1597658 (1926-08-01), Fairchild
patent: 1852085 (1932-04-01), Maynard
patent: 2214903 (1940-09-01), Ickes
patent: 2294621 (1942-09-01), Kraft
patent: 2592724 (1952-04-01), O'Neil
patent: 2690592 (1954-10-01), Schanz

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