| 摘要 |
The invention concerns a method for making packaging bags (1) with a double wall (31; 31), characterized in that it comprises steps which consist in: unwinding a first packaging sheet (31) wherein a window is cut out or precut; unwinding a second packaging sheet (32) wherein another window is cut out or precut; applying a closure assembly (5) on the moving packaging sheet, perpendicular to a window; fixing the closure assembly on the packaging sheet; fixing the two packaging sheets one on the other to form a double wall, said sheet being then formed into a packaging bags (1). |
