| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a plastic cap which is less painful in a hand and hardly slippery from the hand, and easily openable by finding out that the causes of hardly opening a container for beverage are two factors of the pain in the hand and the slip from the hand. <P>SOLUTION: The plastic cap 10 comprises a top plate part 11 and a cylindrical barrel part 12 hanging from a circumferential edge of the top plate part 11. A knurl 14 composed of a plurality of projecting bars 13 extending in a direction from the top plate part 11 to a circumferential end 16 of the barrel part 12 is provided on the outer peripheral surface of the barrel part 12, and the plastic cap forms a lid of a container 30. Areas 21a, 21b, 21c in which the projecting bars 13 are installed circumferentially at equal spacings along the barrel part 12 are formed in the circumferential direction of the barrel part 12, and the spacing of the projecting bars 13 in the area 21a and the area 21b adjacent to each other and the spacing of the projecting bars in the area 21b and the area 21c are different from each other. <P>COPYRIGHT: (C)2008,JPO&INPIT |
