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:
Dec. 26, 1995
Filed:
Aug. 10, 1994
Applicant:
Inventors:
Masayoshi Akiyama, Kobe, JP;
Tomio Yamakawa, Kawanishi, JP;
Assignee:
Sumitomo Metal Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21B / ;
U.S. Cl.
CPC ...
72 97 ;
Abstract
An inclined-rolling apparatus for piercing and rolling a tube material by the use of a pair of piercing rolls and a pair of disk rolls, wherein rolling operation is executed with the disk rolls being positioned such that a skew angle opposite to the revolving direction of the tube material is added to the outlet sides thereof and their shaft center lines are inclined. In order to get rid of the interference between the piercing rolls and the disk rolls, there is provided a circular groove at the periphery of a side face of each disk roll.