| 摘要 |
A method for sealing a plastic spout (150,170) between two foil walls of a pouch. The spout has a spout body, which forms a passage (153) for delivering a medium from the pouch and/or feeding a medium to the pouch. In a bottom part thereof, the spout, on opposite sides, forms a sealing zone for sealing to an adjoining foil wall. The sealing zones of the spout body are formed by thin, flexible sealing walls (158,159) which project downward from the spout body and between them delimit a substantially oval space. The sealing walls of the spout body each have a curvature over their entire length, such that each sealing wall is outwardly convex over its entire length with respect to an imaginary plane passing through the outermost ends, which adjoin one another, of the sealing walls. The sealing method comprises the step of pressing the foil walls onto the sealing walls using pressure-exerting means. The pressure-exerting means press the foil walls onto the sealing walls of the pouch without a support member internally supporting the sealing walls. |
