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. 25, 2018
Filed:
Jan. 26, 2009
Koji Matsuyama, Tokyo, JP;
Koji Matsuyama, Tokyo, JP;
Kabushiki Kaisha Bridgestone, Chuo-ku, Tokyo, JP;
Abstract
A wire drawing apparatus () is used in a final drawing process to ensure adequate initial performance of adhesion between brass-plated steel wire and rubber without a drop in productivity. At least one of the die () disposed in the most downstream position, the die () disposed in the second most downstream position, and the die () disposed in the third most downstream position is a drawing die having a friction coefficient μ of 0.12 to 0.41 with the brass-plated steel wire. The other dies () are drawing dies each having a friction coefficient μ of 0.1 or below. By using these drawing dies, brass-plated steel wire () is drawn, and a noncrystalline portion of high lattice defect density is formed on the surface of the crystalline portion of the brass-plating layer of the brass-plated steel wire ().