| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress the dispersion of inner pressure releasing values or the like by securing adequate falling strength and further suppressing the deformation of a weakened part during capping in a cap and a bottle. <P>SOLUTION: The cap 1 is provided with a top face part 4 arranged at an upper part and a cylindrical part 5 formed by generally vertically downwardly extending from the peripheral edge of the top face part 4, and seals the mouthpiece part of the bottle body. The cylindrical part 5 has a plurality of knurl recess parts 12 which are formed in the vicinity of the top face part 4 in a circumferential direction except a partial non-formation region, knurl slits 12a which are respectively opened and formed at the knurl recess parts 12 to release inner pressure when opening a bottle and a weakened line 13a which is formed at the non-formation region and arranged at the lower side than the knurl slits 12a and opens with the mouthpiece part of the bottle body sealed when rising to a predetermined inner pressure. <P>COPYRIGHT: (C)2008,JPO&INPIT |
