| 摘要 |
A method of making a plurality of flexible containers ( 12/112/212 ) comprising the steps of manufacturing a plurality of bag structures ( 13/113/213 ), separately manufacturing a plurality of valves ( 10/110/210 ), aligning the valves ( 10/110/210 ) with openings ( 24/124/224 ) in the bag structures ( 13/113/213 ), and securing the aligned valves ( 10/110/210 ) to the bag structures ( 13/113/213 ). Each valve ( 10/110/210 ) comprises a vent layer ( 30/130/230 ) which is pervious with respect to expected gasses and a sealed passageway is formed between the vent layer ( 30/130/230 ) and the container ( 12/112/212 ) when the valve ( 10/110/210 ) is secured to the bag structure ( 13/113/213 ).
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