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. 19, 2012
Filed:
Jan. 22, 2009
Toshiki Ishikawa, Osaka, JP;
Yoshio Goda, Osaka, JP;
Tadahiro Tokumoto, Osaka, JP;
Masaji Moriwaki, Osaka, JP;
Seiichi Kato, Osaka, JP;
Toshiki Ishikawa, Osaka, JP;
Yoshio Goda, Osaka, JP;
Tadahiro Tokumoto, Osaka, JP;
Masaji Moriwaki, Osaka, JP;
Seiichi Kato, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A battery case is made by cutting from a blank case of a bottomed cylindrical battery case having an unwanted portion at an opening portion the unwanted portion from the case wall in the circumferential direction by a blade. The cutting of the case wall is performed so as to render a cutting-end portion higher than a cutting-start portion. Thus, re-cutting of the cutting-start portion by the blade after it has already completed one rotation can be avoided. As a result, the generation of thread-like chips from re-cutting of the cut surface can be avoided.