The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 1976
Filed:
Jul. 08, 1974
Applicant:
Inventors:
Eric Holroyd, High Legh Park, near Knutsford, EN;
Anthony Gerald Goodfellow, Maghull, near Liverpool, EN;
Assignee:
Dunlop Limited, London, EN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C / ; B29H / ;
U.S. Cl.
CPC ...
264 89 ; 156118 ; 156292 ; 264 93 ; 264 96 ; 264248 ; 264294 ; 264326 ; 425 45 ;
Abstract
A method of manufacturing tire inner tubes in which the tube is moulded in two annular parts from worked uncured rubber, and the parts are joined but before curing of the rubber is completed the tube is stretched to a larger internal diameter and inflated into a mould with the larger internal diameter.