| 摘要 |
<p>The head (1) has a neck (2) comprising an opening (6) at an end (21) for removing product from a tube. A shoulder (3) is connected to another end (22) of the neck opposite the former end. An air anti-return unit (4) i.e. grating, is placed in the neck and avoids return of air from the former end to the latter end, where the head is a single block element and formed from a plastic material. The grating is placed at an intermediate position between ends of the neck, so that distance (L) between the anti-return unit and the former end ranges between 1/2 of height (H) of the neck and the height. An independent claim is also included for a method for manufacturing a tube head.</p> |
