| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a can lid capable of preventing a careless breaking from the starting end part of a score to the terminal end part of the score from being generated at the hinge part of an opening piece, and ensuring suitable can opening properties. <P>SOLUTION: A main score 4a and an auxiliary score 4b are connected with each other by a shifting section gradually changing from the main score 4a to the auxiliary score 4b at least at a starting end part 41, and the starting end part 41 is formed to be convex outward by a continuous body of a plurality of circular arcs. The shifting section starts at a position rotating 100°or above in the counter-clock direction around the center C of the circular arc by using a line B passing through the center C of the circular arc constituting the outward tip part mostly separated from the rivet 3 among these circular arcs and perpendicular to the tab in the longitudinal direction as a reference. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
