| 摘要 |
It is formed from a tubular sheet 9 and comprises an opening 12 giving access to its inside and, optionally, a hermetic closure 5. It is characterized in that it comprises a strip 2 which closes said opening 12 so that it is necessary to separate the strip 2 from the bag 1 in order to be able to gain access to its inside. The process is characterized in that, before making a longitudinal cut 10 in the tubular sheet 9, a longitudinal portion of sheet 9 is removed in the area opposite the area where the cut 10 will be made, and two strips 2 are extruded at the open ends 11 of the sheet 9. The strip seals the bag and enables it to be opened easily. At the same time, the strip reinforces the upper part of the bag. This process makes it possible to produce sealed bags from each section of tube. <IMAGE>
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