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:
Nov. 08, 1977
Filed:
May. 21, 1975
Applicant:
Inventor:
Anthony Gerald Goodfellow, Maghull, near Liverpool, EN;
Assignee:
Dunlop Limited, London, EN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29H / ;
U.S. Cl.
CPC ...
1561 / ; 156125 ; 156414 ; 264326 ; 425 51 ;
Abstract
In the moulding of the tread portion of a pneumatic tire the radially inner surface of the mould cavity is defined by the radially outer surface of an annular former of elastomeric material. The former is contracted, a breaker assembly is built onto it and it is allowed to expand to stress the breaker. In the mould the former is further expanded and is held in compression between mould parts and the breaker to withstand moulding pressure. The former may have inflatable pockets to throw the breaker edges into contact with tire sidewall reinforcements.