US Patent 6846444 Self-releasing curing bladders
Patent 6846444 was granted and assigned to The Goodyear Tire & Rubber Company on January, 2005 by the United States Patent and Trademark Office.
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Patent abstract
The invention relates to expandable butyl rubber bladders for use in curing presses for hydrocarbon rubbers such as pneumatic tires. The bladders are a crosslinked butyl rubber composition comprising isobutylene repeat units and the bladder composition contains ultra high molecular weight polyethylene, alone or in combination with graphite and/or fluorinated ethylene polymers, dispersed within the bladder composition. The bladder composition may also contain castor oil, corn oil and/or soya-bean oil. The invention also relates to a method of curing tires by utilizing such butyl rubber bladder.
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Patent Inventor Names
Paul Harry Sandstrom0
Roger Neil Beers0
Date of Patent
January 25, 2005
0Patent Application Number
103190650
Date Filed
December 13, 2002
0Patent Primary Examiner
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US Patent 6846444 Self-releasing curing bladders
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