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:
Jan. 17, 1989
Filed:
Dec. 31, 1986
Applicant:
Inventor:
Kusuo Furukawa, Tokyo, JP;
Assignee:
Kawasaki Steel Corporation, Kobe, JP;
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
428600 ; 428687 ; 428925 ; 72199 ;
Abstract
A painting steel sheet having an improved distinctness of image after painting has such a surface roughness profile that a center-line average roughness is within a range of 0.3-3.0 .mu.m and a microscopic shape is comprised of mountain portions, groove-like valley portions and middle flat portions satisfying particular dimension relations, and is produced by temper rolling a steel sheet at a draft of not less than 0.3% with work roll dulled to particular dimensions through a high density energy source.