| 摘要 |
Device for a bag valve, including an infolded corner edge (5), which together with infolded side edges (6,7) make up a valve opening, and an attached valve tongue consisting of two superimposed flaps (21,22) of different flexibility. The lower flap (21) is stiffer than the upper (22), which faces the valve opening. The lower flap is preferably made of paper and the upper one of plastic film.<IMAGE> |
