| 摘要 |
Contour of a storage section (13) of a three-sided bag (10-1) is formed of (1) two side inner lines (13a) in a longitudinal direction, (2) two tilt inner lines (13b) which tilt inside with forming an obtuse angle with each side inner line (13a) from a lower end of each side inner line (13a), and (3) one lower side inner line (13c) in a lateral direction which connects lower ends of respective tilt inner lines (13b). A longitudinal size 'a' of an intersection IPa of the side inner line (13a) and tilt inner line (13b) on the basis of an intersection BP of a side outer line (14a) or its extension, and a lower side outer line (14b) or its extension is preferably within a range of 0.08A to 0.71A, and a lateral size 'b' of an intersection IPb of the tilt inner line (13b) and lower side inner line (13c) on the basis of an intersection BP is preferably within a range of 0.12B to 0.48B. |
