| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent formation of a swell part on an inner surface side of a mountain-fold part of a lateral edge of a side face plate, or an outer surface side of a valley-fold part of a lateral edge of a second side face plate when the part of the fold part of the lateral edge of the side face plate at an upper face position of a container body and the part of the fold part of the lateral edge of the second side face plate at the upper face position of the container body are joined together, and to prevent a microscopic through-hole from being formed at a first assembly point so that melted contents may not leak out of the container through the through-hole. <P>SOLUTION: At least one of a line 20 provided at each of folding positions on both lateral edges of the side face plate 12, and a line 21 provided at each of folding positions on both lateral edges of the second side face plate has a positionally displaced line of which the center position of the line is displaced with respect to a folding position (a) at the part on the side of the upper face position of the container body. <P>COPYRIGHT: (C)2013,JPO&INPIT |
