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:
Sep. 22, 1987
Filed:
Nov. 08, 1985
Applicant:
Inventor:
Lucian H Lyall, Woodland Hills, CA (US);
Assignee:
R. W. Lyall & Company, Inc., Santa Fe Springs, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
156 64 ; 138155 ; 1562742 ; 1563042 ; 156359 ; 156378 ; 1563797 ; 219535 ; 285292 ;
Abstract
A method and apparatus for thermal fusion of thermoplastic pipes. Heat is applied to a joint interface between thermoplastic pipes and a thermoplastic coupling at a slow rate to raise the temperature of the interface to a predetermined preheat temperature, and then at a rapid rate to quickly raise the temperature to the fusion point, resulting in proper localized fusion heating at the joint interface.