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:
Jul. 07, 1992
Filed:
Aug. 05, 1991
Applicant:
Inventor:
Toshio Nagata, Tokyo, JP;
Assignee:
Kahan Sendan Kikai Kabushiki Kaisha, Chiba, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72165 ; 72163 ;
Abstract
A roller leveler comprises a raisable upper work roll group, and a lower work roll group, the upper and lower work roll groups being arranged in a zigzag form so that the axes of three work rolls adjacent to each other at upper and lower sides and three points of intersection with the plane crossing these axes may make three vertexes of an isosceles triangle, with alternate lower work rolls in the lower work roll group being raisable to act as upper work rolls when a relatively thick hoop is leveled.