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:
Dec. 17, 2002
Filed:
Jun. 20, 2001
Jean-Louis Laveran, Asnieres S/Seine, FR;
Valeo Thermique Moteur, La Verriere, FR;
Abstract
A tube for a heat exchanger consists of a folded metal strip having an outer face covered with a plating of brazing alloy ( ) and including at least one folded border ( ) having a sheared edge bearing on an inner face ( ) of the metal strip. The metal strip is folded by passing through a series of successive rollers. The sheared edge is covered with a layer of brazing alloy ( ) which has advantageously been pushed back by the rollers from the outer surface towards the sheared edge. According to the method, the metal strip is made to pass between a series of rollers, each roller including a surface which exhibits an inclination with respect to the rotational axle of the rollers, the inclinations of the successive rollers continually increasing.