| 摘要 |
PROBLEM TO BE SOLVED: To provide an exterior carton capable of stably discharging steam exhausted from a packaging bag during heating cooking by a microwave oven to the outside and stably holding the packaging bag.SOLUTION: The exterior carton is an outer layer carton comprising a rear surface plate, a surface plate, a front surface plate, and a second side surface plate. A blank is assembled where a perforation line extending from one point at a peripheral edge biased from the central part of the front surface plate to one side to the other point of the facing peripheral edge is formed in the front surface plate, the vicinity of the central part of the perforation line has a convex shape toward the central part direction of the front surface plate, the perforation line is perforated so as to vertically cross the side surface plate and the second side surface plate to divide each of them into two, a convex cut part is divided and formed on the rear surface plate by a second perforation line at a position facing the convex shape, and a vertical second folding line (B) is formed so that a front end and a terminal end of the second perforation line connect the cut line dividing a gluing margin piece into two and the perforation line of the side surface plate, respectively. |
