| 摘要 |
Two lateral flaps (7, 8) of the blank are folded through 90 DEG towards the inside of the box and above these there is folded an intermediate larger flap (9) whose internal surface is glued to the external surface of the two lateral flaps (7, 8) and covers them entirely. The two lateral flaps (7, 8) and the two sides of the intermediate flap (9) are cut out in such as way that they each have two portions of surface (11, 12, 13, 13') adapted to bear against each other in opposite pairs (12 and 13; 11 and 13') in the opposite direction when the folds (7, 8, 9) are folded in the closed position. <IMAGE>
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