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. 02, 2017
Filed:
Aug. 20, 2009
Koji Hisayuki, Oyama, JP;
Shigeru Aoya, Oyama, JP;
Masaaki Oide, Oyama, JP;
SHOWA DENKO K.K., Minato-ku, Tokyo, JP;
Abstract
A devicefor drawing a tubular workpiece is provided with a drawing dieand a drawing plug. The drawing dieincludes a first curved surface sectionC from which the workpieceis detached while being reduced in diameter, a die bearing sectionB arranged radially inward of and downstream of a workpiece separation point K of the first curved surface sectionC, and a guide sectionD having a second curved surface sectionC which smoothly continues to an upstream end of the die bearing sectionB and configured to again come into contact with the workpiecedetached from the first curved bearing sectionC to guide the workpiece to the die bearing sectionB while reducing a diameter of the workpiece. The drawing plughas a plug bearing sectionB shorter than a length Lof the die bearing sectionB. The plug bearing sectionB is arranged at a position corresponding to the die bearing sectionB.