To make a side wall part surrounded by a rule and one of sides of an opening face easy to swell outward from a carton for improving safety and operativity in unpacking by providing the rule for making the side wall easy to bend outward on one or two or more side walls among four peripheral side walls.
In assembling a carton, first the carton is made to stand in a parallelopipe by endlessly connecting via a margin 12 for pasting applied at an end rim of a side wall 11a, then a lower flap 14 is folded in a right angle to overlay a lower flap 13b on a surface of the lower flap 14, and then both are joined via adhesive 17. Then after an object to be received is put in the carton, while upper flaps 13a, 14 are sequentially folded, both flaps are joined via the adhesive 11 for sealing. At the time of unpacking thereafter, the upper flap 13a is peeled off via a zipper 16 and the lower flap 14 is raised up to have the carton opened, and then a hand is put in along the side wall 11a which has been made easy to swell outward with a rule 15 provided slantly, thereby taking out the object.
MURAMATSU HARUHISA
SUGAWARA MASAYOSHI
OJI PAPER CO
Masayuki Asakura (1 outside)
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