| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of forming a rivet of a tabbed can-lid by which the material of the can-lid is highly strengthened, thinned in thickness and, in its turn, the manufacturing cost of a can is reducible without degrading the bonding strength between a panel and a tab.SOLUTION: In a method of forming a rivet a tabbed can-lid by which a nipple 3 is formed on the panel 1 of a can-lid, the nipple 3 is inserted into a rivet hole 5a formed on the inner lance 5 of a tab 4, the nipple 3 is formed into a rivet and the tab 4 is connected to the panel 1. When forming the nipple 3, the rivet is formed by caulking the nipple 3 after forming a nipple level difference 3b on the sidewall 3a of the nipple 3. |
