| 摘要 |
<p>PURPOSE:To suppress greatly a can bottom central panel from expanding outside due to a content, and improve pressure resistant strength of the can bottom drastically by providing ridges on the central panel part which forms a can bottom of a can which is integrally formed and has a can body part and a can bottom part. CONSTITUTION:A central panel part 1 on the bottom of a can consists of a dome panel part 2 which is indented to the inside of the can and a ring-shaped bottom part 4 which connected the dome panel part 2 and a can body part 3, and protrude to the outside of the can and supports the can. At parts which continue from the dome panel parts 2 to the king-shaped bottom part 4, ridges 5 to suppress mainly the dome panel 2 from expanding to the outside of the can due to pressure of a content are provided to improve the pressure resistant strength. A plurality of ridges 5 are provided radially toward the center of the can at the part which continues from the dome panel part 2 to the ring-shaped bottom part 4. Or, the ridges 5 are provided into a linear shape which connects several spots on the ring-shaped bottom part 4 or apolygon-shape. The cross sectional shape of the ridge 5 is formed into a V-shape, U-shape or trapezoid.</p> |
