| 摘要 |
PROBLEM TO BE SOLVED: To provide a food packaging bag which can be accurately opened so that a packaged sandwich can be properly taken out, is excellent in productivity, and prevents the packaged sandwich from deforming. SOLUTION: The food packaging bag consists of overlapped trapezoidal front 10 and rear 20 films with their side rims 11 and 21 sealed, while a narrow end is sealed by a seal 1 and the other wide end can be opened wide by an opening 2, and a portion of the rear film 20 to be torn off from the side of the seal 1 toward the opening 2 serves as a tear-open part 25. A pair of guide sheets 4 and 4 for regulating the width of the tear-open part 25 are provided on both sides of the part 25 of the rear film 20 across lines 26 and 26 to be folded of respective side rims of the rear film 20 to reinforce the film 20. COPYRIGHT: (C)2004,JPO
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