| 摘要 |
<p>The closure device has a guarantee ring (4) of which the inner (5) and outer (6) walls are so formed as to be easily separated from the injection mold. The inner wall (5) forms an angle (α) with the inner wall (8) of the cylindrical closure, respectively with its longitudinal axis (A). The outer wall (6) has a rounded profile (11) directly at the limit of the strips (3) to provide the wall with the desired thickness (d) at a determined location (12). Said rounded profile (11) facilitates the extraction of the closure (1), with the strips (3) and the guarantee ring (4), from the funnel-like upper plunger (10), after withdrawal of the lower plunger (9).</p> |
