| 摘要 |
PROBLEM TO BE SOLVED: To effectively remove air from a corner part as an air reservoir without excessively increasing the interval of unsealed part which is a passage for deaeration as to a packaging bag having a deaeration function by a discontinuous seal line. SOLUTION: A seal structure 1 of this packaging bag comprises an inside seal line 2 and an outside seal line 3. The seal lines 2 and 3 are discontinuous lines formed alternatively with sealed parts 2a and 3a and unsealed parts 2b and 3b. As to the seal line 2 and 3, the interval between both seal lines 2 and 3 is formed gradually larger toward both ends from the center inclining the inside seal line 2 roughly in an ark shape. COPYRIGHT: (C)2004,JPO
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