| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bottle can capable of positively securing sealing characteristics of the bottle can with a cap, with its mouthpiece bonded with a cap. <P>SOLUTION: The bottle can 1 is provided with a curl part 5 at the mouthpiece, which is formed by folding the peripheral edge of the mouthpiece outward in the radial direction. The curl part 5 is provided with an outer surface side wall part 21 the outer surface 21a of which extends in a direction substantially in parallel with the can shaft direction of the bottle can 1, an outer surface side protrusively curved part 22 continuously provided to the upper end of the outer surface side wall part 21 and extending upward in the can shaft direction as it goes in the inward axial direction, and an inner surface side protrusively curved part 23 continuously provided at the end part of the outer surface side protrusively curved part 22 and extending downward in the can shaft direction as it goes in the inward axial direction. The outer surface side wall part 21 is formed by being extended in length to not less than 0.1 mm, and the distance A in the can shaft direction, between the part 25 connecting the external surface side wall part 21 with the outer surface side protrusively curved part 22 and the part 26 connecting the outer surface side protrusively curved part 22 with the inner surface side protrusively curved part 23, is greater than 0.3 mm and not greater than 1.3 mm. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
