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. 05, 1985
Filed:
Mar. 05, 1984
Applicant:
Inventors:
Larry F Diehl, Jr, Fort Worth, TX (US);
Robert M Gibbon, Fort Worth, TX (US);
Assignee:
Jamak, Inc., Weatherford, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29H / ;
U.S. Cl.
CPC ...
264150 ; 264526 ; 264531 ; 264230 ; 264236 ; 264294 ; 264D / ; 4253261 ; 4253871 ; 425393 ;
Abstract
A method of forming a spark plug boot which utilizes an extrusion process. An elastomeric tube is extruded, then heated to a partially cured condition. The tube is then cut into individual pieces. The individual pieces are stretched over a pin which has at least one external shoulder. The pin and tube are then heated to a temperature and for a time to provide a final cure. The tube is stripped from the pin. The compression set and shrinkage results in an internal shoulder in the tube, allowing it to serve as a spark plug boot.