| 摘要 |
<P>PROBLEM TO BE SOLVED: To stably exhibit bottle's absorption performance of in-bottle pressure reduction. <P>SOLUTION: A bottle includes a bottom 14, which has a bottom wall 19. The bottom wall is formed of: a grounding part 18 located at an outer peripheral edge thereof; a standing peripheral wall 21 continuing the grounding part from an inside in the direction of the bottle diameter, and extending upward; an annular movable wall 22 protruding downward from an upper end of the standing peripheral wall to its more inner side in the direction of the bottle diameter; and a depression peripheral wall 23 extending upward from an inner edge in the direction of the bottle diameter, of the movable wall. Here, the movable wall is disposed such that it can turn around connections 25 between the standing peripheral wall and itself thereby shifting the depression peripheral wall upward, and the depression peripheral wall is formed with a plurality of swelling parts 23d toward an inside of the bottle and toward an inner side in the direction of the bottle diameter which are consecutively arranged in a bottom circumferential direction. In a horizontal sectional view of the swelling parts, there is formed a polygonal prismatic tubular part 23f having: an interruption 23e between the adjoining swelling parts in the bottle circumferential direction at each of corners; and sides as the swelling parts. <P>COPYRIGHT: (C)2012,JPO&INPIT |
