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:
May. 21, 2013
Filed:
Sep. 15, 2011
Koichi Hashizume, Kawasaki, JP;
Masakazu Yoshimoto, Kawasaki, JP;
Nobuyuki Washio, Kawasaki, JP;
Yoichiro Kimoto, Kawasaki, JP;
Hiroshi Sato, Kawasaki, JP;
Isao Izui, Kawasaki, JP;
Koichi Hashizume, Kawasaki, JP;
Masakazu Yoshimoto, Kawasaki, JP;
Nobuyuki Washio, Kawasaki, JP;
Yoichiro Kimoto, Kawasaki, JP;
Hiroshi Sato, Kawasaki, JP;
Isao Izui, Kawasaki, JP;
Oki Electric Cable Co,. Ltd., Kanagawa, JP;
Abstract
A wire material having a copper-zinc alloy layer, which is formed by action of thermal diffusion, and a zinc layer on its circumference surface is subjected to processes, including from a step of drawing the wire material to a step of reducing the diameter of the product, to reliably crash the copper-zinc alloy layer into particles. The particles are embedded in the circumference surface of a core to integrate the diffusion alloy layer and zinc layer with the core and prevent the diffusion alloy layer and zinc layer from falling off from the core. In addition, in order to cover cracks formed in the copper-zinc alloy layer during wire drawing with a zinc thin film, wire drawing is performed at temperatures appropriate for maintaining good malleability and ductility of zinc.