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:
Jul. 06, 2004
Filed:
Apr. 17, 2002
Applicant:
Inventors:
Carleton L. Berk, Indianapolis, IN (US);
John D. Phillips, Pendleton, IN (US);
Diane E. Hageman, Fishers, IN (US);
Assignee:
Delphi Technologies, Inc., Troy, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29C 4/520 ; B29C 4/514 ; B29C 4/578 ;
U.S. Cl.
CPC ...
B29C 4/520 ; B29C 4/514 ; B29C 4/578 ;
Abstract
A system and method is disclosed that uses an empirically-derived thermal transfer function for an ignition coil taken with respect to an ambient temperature and responsive internal temperatures. The system combines the transfer function with a minimum cure-induced stress profile, in order to obtain a time-temperature profile for minimizing cure-induced residual stress in an epoxy resin impregnated ignition coil. An accelerated minimal-stress profile is obtained by increasing an initial gel isotherm temperature of the above-mentioned time-temperature profile.