| 摘要 |
Notches (21a, 21b) are formed at the corners of only one side edge (19a) of a metal jacket blank (19) of a rectangular metal strip. The blank (19) is rolled into a cylindrical shape so that its opposite sides (19a, 19b) are adjoined to each other forming an abutment joint (10) and a lower end (19c) of the blank (19) is inwardly curled and crimped to form a bottom, thus completing an outer metal jacket (18). After a cell member (26) is loaded into the metal jacket (18), the upper end (19d) of the blank (19) is inwardly curled and crimped to cause the notches (21a, 21b) to abut the other side edge (19b) of the blank (19), forming a curled abutment joint (20) along a direction (S) being different from the radial direction (R) of the metal jacket (18). This arrangement prevents any dents caused by the buckling of the outer metal jacket (18) while being crimped, and allows dry cells to be more efficiently produced. <IMAGE> |
