| 摘要 |
PROBLEM TO BE SOLVED: To provide an erectable curved packaging container made of paper capable of being stably placed in the state that the wide surface walls thereof are made vertical without losing the beneficial point of the packaging container for trout Sushi or the like. SOLUTION: In the erectable curved packaging container having edge folds corresponding to flatly folding operation formed both left and right ends thereof, bottom part turning in walls brought to a close contact state by folding are provided to the inner surfaces of the lower ends of both surfaces walls by providing horizontal turning-in lines to the lower ends of both surface walls and a bottom part wall coming into contact with both surface walls by curved folds is formed to the bottom part turning in walls and a middle fold is provided to the bottom part wall. This packaging container is constituted by assembling rigid cardboard. Since this packaging container can be stably erected in such a state that the curved surface walls made of paper thereof are made vertical, a space can be effectively utilized by arranging the packaging containers side by side in transport/keeping or display in the shopwindow, and since the taking in and out of content or folding is easy and the on-off operation of a lid piece at the lower end of the packaging container becomes unnecessary, the packaging container can be folded or unfolded by one-touch operation.
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