Break for the border structure of paper containers and paper products

摘要

PROBLEM TO BE SOLVED: To easily rupture a wall part with an excellent external appearance.;SOLUTION: A packing box 10 comprises an operation part 22 provided in first wall parts 11A and 11B, an auxiliary bending line 30 slantingly extending in the inside upper direction toward the operation part 22 from a side part in the lateral direction of the first wall parts 11A and 11B, a first rupture line 25 extending toward an outside end part in the lateral direction of the auxiliary bending line 30 from the operation part 22 and a second rupture line 26 extending over the tip edge of second wall parts 16A, 16B, 17A and 17B continuously provided in the first wall parts 11A and 11B from an end part of the first rupture line 25 or the upper edge of the first wall parts 11A and 11B.;COPYRIGHT: (C)2014,JPO&INPIT