CONTAINER WITH ROUND TYPE CEILING BOTTOM HAVING REINFORCED PROJECTION PART DISTRIBUTED IN COMPLICATED ANNULAR BAND

摘要

To provide a container having an excellent mechanical property while providing a proper blow moldability, a good stability both after filling and emptying, and further an improving design.SOLUTION: The present invention relates to a plastic container, comprising a body extending along a longitudinal axis between an opening and a bottom part, the bottom part has a seat part forming the mounting surface of the container, a concave type round ceiling part extending from the vicinity of the seat part to the central amorphous region, and a reinforced projection part (16, 17) projecting from the concave type round ceiling part and extending radially inward of the round ceiling part (15), the container is arranged such that the reinforcing projection part is angularly spaced from one another with a first projection part (16) and a second projection part (17) arranged alternately, these projection parts have a first annular band (19) from which the first projection part extends, and a third annular band (21) from which the second projection part extends.SELECTED DRAWING: Figure 4