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:
Apr. 15, 1980
Filed:
Apr. 28, 1978
Applicant:
Inventor:
John R Burrell, Chalfont, PA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
264142 ; 1561 / ; 156118 ; 156122 ; 264150 ; 2641 / ; 2642102 ; 264292 ; 425325 ; 425381 ; 425466 ; 425467 ;
Abstract
A retreading envelope is made by extruding a split tube of rubber which is passed over a rotating stretching wheel to stretch the split tube to a predetermined shape. The stretched split tube is removed from the stretching wheel after moving around a part of the circumference thereof and is turned inside out and placed on a table whereat it is formed and cut into an annular shape preparatory to completion of the retreading envelope.