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:
Apr. 03, 2018
Filed:
Jul. 11, 2008
Shinichi Kaga, Hitachi, JP;
Noriaki Tominaga, Hiroshima, JP;
Takehiko Saito, Hiroshima, JP;
Mitsuru Onose, Tokyo, JP;
Yasutsugu Yoshimura, Kawasaki, JP;
Hirotoshi Tagata, Hiroshima, JP;
Yujiro Watanabe, Hiroshima, JP;
Satoru Zenitani, Hiroshima, JP;
Ikuo Wakamoto, Hatsukaichi, JP;
Shinichi Kaga, Hitachi, JP;
Noriaki Tominaga, Hiroshima, JP;
Takehiko Saito, Hiroshima, JP;
Mitsuru Onose, Tokyo, JP;
Yasutsugu Yoshimura, Kawasaki, JP;
Hirotoshi Tagata, Hiroshima, JP;
Yujiro Watanabe, Hiroshima, JP;
Satoru Zenitani, Hiroshima, JP;
Ikuo Wakamoto, Hatsukaichi, JP;
PRIMETALS TECHNOLOGIES JAPAN, LTD., Tokyo, JP;
Abstract
A pair of upper and lower pressure rollersis disposed so that their axesare tilted in a horizontal plane in respective directions opposite to each other with respect to a straight line perpendicular to a welding line of a joint portion J. The pressure rollersare positively driven by corresponding electric motorsto thereby roll the joint portion. Thus, steps defined at the joint portion can be smoothed and a step gradient can be reduced to ensure a high degree of joint strength. Thus, it is possible to prevent a step portion from being interfolded into the base material of the meal plates