| 摘要 |
PROBLEM TO BE SOLVED: To improve box strength without degrading storage efficiency of a packaging box. SOLUTION: The packaging box 10 includes, over a full length of side rims, reinforcing pieces 41 to 44 connected with the side rims intersecting with upper rims of side plates 11 to 14 where lid plates 31 to 34 are connected. The reinforcing pieces 41 to 44 are stuck to external side faces of the side plates 13 and 14 while being folded in two or more plies. COPYRIGHT: (C)2004,JPO
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