| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a sealable can in which the hammering frequency does not generate any 'beat tone'. SOLUTION: In the sealable can having a bottom panel part on an inner side of a circumferential landing part formed on the outer circumference of a bottom part, the shape of the bottom panel part is curved so that the difference in the hammering frequency when the internal pressure of the can is 50 kPa and 0 becomes 100-2,000 Hz in order to avoid the frequency band in which the frequency of the hammering frequency generates the 'beat tone' by changing the riser point (the riser frequency) and/or the inclination of a frequency curve in the characteristic between the internal pressure of the can and the frequency during the hammering. More specifically, the diameter of the can is set 40-160 mm, and the radius of curvature of the bottom panel part is set 200-2,000 mm.</p> |
