| 摘要 |
A closure (2) comprising a solid colour spout (6) and a transparent overcap (4) is adapted to be sealed to a container neck (50) by means of a double-sided foil (8). The overcap (4) has a depending valve (24), which engages with the spout (6) to hold these components together prior to assembly to the container. The spout (6) has a flange (10) adapted to seat on a rim (54) of the container neck and an annular wall (28) that is received within the container neck (50). The foil (8) is welded to the flange (10) and is also used to weld the closure (2) to a rim (54) of a container neck of standard threaded design. The overcap (4) can screw to an external thread on the container neck. The primary ex-factory seal is provided by welding the assembled closure to the neck. The secondary seal is provided by the engagement of the overcap valve (24) with the spout (6). The invention discloses an improved method of assembly. |
