| 摘要 |
PROBLEM TO BE SOLVED: To improve the unsealability by forming a projecting part from a center part to a circumferential part of a can lid, forming an opening piece to be demarcated by a score line on a recessed part formed on the projecting part, and fixing a tab to the recessed part to easily hook a finger to a rear end part for lifting the tab. SOLUTION: In opening a can lid 1, a rear end part 20 for lifting a tab 15 is hooked by a finger and lifted. Since the tab 15 is lifted by a projecting part 14, the rear end part 20 is sufficiently separated from a bottom surface of a recessed part 9, the recessed part 9 is located above a seaming flange part 2, and a recessed part 16 for hooking a finger is formed, the rear end part 20 is easily hooked by a finger. By lifting the tab 15, the leverage effect is generated with a pressing tip part 19 of the tab 15 as a supporting point, and a tongue-like fixed part 17 fixed by a rivet 18 as a point of application, and the breakage is advanced along a main score line 10a to form an opening part. |
