| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a packaging vessel hardly causing a wrinkle in a wrap film and having improved strength of a circumferential wall part. <P>SOLUTION: The packaging vessel, obtained by thermoforming a foamed resin sheet or a sheet prepared by laminating an unfoamed resin film on at least one surface of the foamed resin sheet, includes a bottom surface 10, the circumferential wall 20 standing upward on the outer circumference of the bottom surface 10, and a flange 30 mounted at the upper end of the circumferential wall 20 and protruding outward. The flange 30 includes a protrusion 31 whose upper surface 31a is of an upward protruding curved surface shape, a horizontal end part 32 formed so as to be located at the outermost circumferential margin of the vessel, and a reinforcement part 33 adjoining the protrusion 31 and thicker than the protrusion 31. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
