| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To attach a cap favorably without making the cap attached to a capsule section of a bottle cap generate a bridge cut. <P>SOLUTION: The effective thread number of turns of a thread section 13 being prepared in a capsule section 12 of the bottle cap 11 is formed by 2.0 to 2.5 turns. That is, the thread section 13 is formed so that a space between a starting position 13a and an ending position 13b which functions effectively as the thread section 13 in the capsule section 12 may become 2.0 to 2.5 turns. The bottle cap 11 having such a thread section 13 shows a size of 28 to 38 mm in the maximum outer diameter of the thread section 13 formed in the capsule section 12 and 0.25 to 0.4 mm in the thickness of the capsule section 12, and the effective thread number of turns is formed in the thread section 13 of the 2.0 to 2.5 turns by eight screw pitches per inch to this. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
