| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a container which is molded of a resin such as polypropylene that is proof against bending, or molded of a soft resin, and can positively perforate an air hole inside by pushing down a projection. <P>SOLUTION: In formation of the packed food container, first, an annular groove 3 for opening the air hole is formed in a bottom portion 2 of the synthetic resin container 1, and the contents-dropping projection 4 projects from the bottom portion at a location inside the annular groove, followed by securing a minute interval between a lower edge of the projection or an extension of the lower edge and the annular groove. Further a thickness from the lower edge of the projection inside the annular groove to a rear surface of a bottom plate is set to a value equal to or thicker than the thickness of the bottom plate outside the annular groove. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
