| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a cap which is prevented from coming off from a bottle when the inner pressure in the bottle increases to endure an increase in the inner pressure of the bottle. <P>SOLUTION: The cap C comprises a cup-shaped cap body having a top board 11 on the outer peripheral part of which a peripheral wall part 11a is formed, and a liner 20 formed on the inner surface side of the cap body. The top board 11 of the cap body has an easy-to-break lines 13, which can be broken when receiving a pressure of a given intensity from the inside of the top board 11, exhaust boards 22, which are outlined by the easy-to-break lines 13 and have hinges 25 each formed between both ends of the easy-to-break line 13, and a draw-molding preparation part 12 on the peripheral part of the top board 11. The top part 22a of each exhaust board 22 is formed to project from the hinge 25 in one direction, and the exhaust boards 22 are formed to be further inside in the radial direction of the cap body than the draw-molding preparation part 12 is. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
