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:
May. 08, 2001
Filed:
Apr. 08, 1999
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
Notches (,) are formed at the corners of only one side edge (,) of a metal jacket blank (,) of a rectangular metal strip. The blank (,) is rolled into a cylindrical shape so that its opposite sides (,) are adjoined to each other forming an abutment joint (,) and a lower end (,) of the blank (,) is inwardly curled and crimped to form a bottom, thus completing an outer metal jacket (,). After a cell member (,) is loaded into the metal jacket (,), the upper end (,) of the blank (,) is inwardly curled and crimped to cause the notches (,) to abut the other side edge (,) of the blank (,), forming a curled abutment joint (,) along a direction (S) which is different from the radial direction (R) of the metal jacket (,). This arrangement prevents any dents caused by the buckling of the outer metal jacket (,) while being crimped, and allows dry cells to be more efficiently produced.