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:
Jun. 05, 2001
Filed:
Feb. 04, 2000
Applicant:
Inventors:
Hiroyuki Kan, Niihama, JP;
Keizo Abe, Niihama, JP;
Assignee:
Sumitomo Heavy Industries, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B21D 1/05 ;
U.S. Cl.
CPC ...
B21D 1/05 ;
Abstract
A leveling technique that produces a high degree of flatness of strips and gives strips a characteristic such that parts cut from the strips by etching do not warp. Also, a method of leveling strips including the steps of rectifying a trip by tensioning and bending the strip with a tension leveler. The load acting on the strip by the tensioning and bending being 70% or more of the yield or proof stress of the strip. The method also including rectifying the strip by tensioning the strip with a roller leveler. The tension acting on the strip by the roller leveler being 50 N/mm,or less.