| 摘要 |
<p>A dispenser of paste products, in particular toothpaste, is composed of a cylindrical container (2) provided with a headpiece (4) carrying paste product output means and with a bottom wall (5) fitting in an airtight manner therein for sliding movement one way toward the headpiece. The bottom wall (5) consists of a plunger body (6) having an axial cavity (7) which is open downwardly and communicates, through radial passages (13), with the interior (14) of the container (2), and of a dish-shaped body (15) provided with a lug (16) which fits snugly into the axial cavity (7). The outer surface of the lug (16) on the dish-shaped body is provided with ribs (21) which form, in co-operation with the inner wall of the axial cavity(7) in the plunger body (6), channels (23) extending along paths including at least one sharp change in direction. On completion of the container (2) filling operation, the bottom wall (5) is inserted and pushed against the toothpaste whilst trapped air is vented out through the channels (23,24). Once the air has been vented out, the flow of toothpaste which follows will stagnate inside the channels (23,24) and seal them off, without flowing out of the container (2). Thus, the advantage is secured of having a bottom wall (5) which automatically provides an airtight closure once the trapped air has been vented out.</p> |
