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. 06, 2005
Filed:
May. 01, 2001
Philip Stark, Concord, MA (US);
Guy A. Rossi, Hampton, NH (US);
Hamid R. Mojazza, Chelmsford, MA (US);
Ross Haghighat, Westford, MA (US);
Peter Schuler, Westwood, MA (US);
Philip Stark, Concord, MA (US);
Guy A. Rossi, Hampton, NH (US);
Hamid R. Mojazza, Chelmsford, MA (US);
Ross Haghighat, Westford, MA (US);
Peter Schuler, Westwood, MA (US);
Ashland, Inc., Columbus, OH (US);
Abstract
The present invention provides new polymer induction bonding technology. Induction heating technologies are utilized to weld, forge, bond or set polymer materials. The invention provides controlled-temperature induction heating of polymeric materials by mixing ferromagnetic particles in the polymer to be heated. Temperature control is obtained by selecting ferromagnetic particles with a specific Curie temperature. The ferromagnetic particles will heat up in an induction field, through hysteresis losses, until they reach their Curie temperature. At that point, heat generation through hysteresis loss ceases. This invention is applicable to bonding thermoplastic materials, wherein only the area to be heated has ferromagnetic particles in it; bonding of thermoset composites, which have been processed with a layer of thermoplastic material on one side; curing of thermoset adhesives or composite resins; or consolidating thermoplastic composites.