| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable to avoid any damage of a projecting rib of a container lid as much as possible even when a chuck (52) having a large number of locking projecting ribs (68) extending in the axial direction with the angular spacing of, for example, 2α° on a locking inner peripheral surface (66) by improving a container lid (2) in which a first area (38) having a large number of projecting ribs (42) extending in the axial direction with the angular spacing of α°, and a second area (40) having a large number of projecting ribs (44a and 44b) extending in the axial direction with the angular spacing of 2α° are alternately provided on an outer peripheral surface of a skirt wall (10). <P>SOLUTION: In the projecting rib formed in the second area on an outer peripheral surface of a skirt wall of a container lid, the projecting amount in the radial direction of the alternately located projecting ribs (44a) is the same as that of the projecting ribs formed in the first area, while the projecting amount in the radial direction of the remaining alternately located projecting rib (44b) is slightly reduced. <P>COPYRIGHT: (C)2010,JPO&INPIT |
