| 摘要 |
A bag having a closeable flap portion, and a method of manufacturing same, are disclosed. The bag includes first and second panel portions, and a top flap portion extending from and integral to the second panel portion along a fold line adjacent to an opening between the first and second panel portions. The inner surfaces of the first and second panel portions have surface characteristics rendering them capable of being firmly heat sealed together along the side edges thereof, while the outer surfaces of at least the second panel portion and of the flap portion along the side edges have surface characteristics rendering them capable of only being weakly heat sealed together. The flap portion is initially folded onto the outer surface of the second panel portion and is held thereinplace along the side edges by means of a weakened seam achieved by virtue of heat sealing of the side edges of the first and second panel portions and the flap portion. The end of the flap portion remote from the fold line is adapted to be pulled away from the outer surface of the second panel portion to break the weakened seal between the flap portion and the second panel portion while maintaining the integrity of the side edge seams along the inner surfaces of the first and second panel portions.
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