| 摘要 |
<p>The one-piece elastic plastic sealing cap is for bottles, etc., having a concentric internal annular spigot with annular sealing lip extending outwards. At the root (9) of this lip (8) a second annular sealing lip (10) is formed, concentric to the first one, and so arranged that the centre lines (8a, 10a) through the lip cross-sections diverge roughly at right angles. Between the common root for the lips and the spigot (5) the wall thickness can be reduced (6) to form an annular bending zone.</p> |
