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. 12, 1985
Filed:
May. 08, 1984
Shigeo Masuda, Aichi, JP;
Morihiko Katsuda, Aichi, JP;
Abstract
A process for producing an insulated rectangular wire adapted for edgewise winding. A round wire of copper, copper alloy, aluminum or aluminum alloy is drawn through a die in a tandem-extrusion apparatus. The drawn wire is then electrolytically cleaned, following which an insulating coating is applied to the cleaned surface. The insulating coating is baked, and finally the insulated wire is subjected to at least one cycle of rolling. Preferably, the drawing is done with a single die and capstan to thereby remove any surface defects in the conductor having a size of 3 .mu.m or greater. The capstan should be made of a material softer than the material of the conductor. Further, it is preferred that fresh lubricating oil containing no metal dust be applied to the surface of the conductor during the drawing process.