Plastic spout

摘要

A plastic spout (150,170) which is adapted to be sealed 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 a sealed connection to an adjoining foil wall. The sealing zones of the spout body are formed by sealing walls (158,159) which project downward from the spout body, each having 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 walls can preferably move flexibly transversely with respect to their plane and, on their inner side, are unsupported or are supported by one or more flexible supporting parts of the spout body.

主权项

1. A plastic spout which is adapted to be sealed between two foil walls of a pouch, comprising an injection moulded single part spout body comprising:
(a) a transverse wall; (b) two thin, flexible sealing walls forming a sealing zone for a sealed connection to an adjoining foil wall, that each have an upper edge adjoining the transverse wall, wherein the two sealing walls have a length and adjoin one another at the outermost ends, wherein the sealing walls freely project perpendicularly downwards over a height from said transverse wall, said flexible sealing walls between them delimiting an open, oval space having essentially the same cross-sectional dimension over the height of the sealing walls, the dimension of the transverse wall exceeding that of the cross-section of the oval space, and said flexible sealing walls each have a curvature over the entire length of the sealing walls as viewed from below the spout, such that each sealing wall is outwardly convex over the entire length of the sealing walls with respect to an imaginary plane passing through the outermost ends of the sealing walls; (c) thin lips, each formed at the location where the outermost ends of the sealing walls meet and projecting outwardly in said imaginary plane; and (d) an upwardly projecting cylindrical tubular part having a lower end adjoining the transverse wall, said tubular part projecting perpendicularly upwards from said transverse wall, the cross-section of the oval space exceeding that of the cross-section of the cylindrical tubular part, said tubular part forming at least a part of a passage that extends through the transverse wall and is in communication with said oval space for delivering a medium from the pouch or feeding a medium to the pouch, said tubular part including screw thread.