| 摘要 |
<p>A closure for the externally screw-threaded neck of a container such as a bottle is moulded in one piece from a plastics material and comprises a top 11 and a depending skirt 12 which has an internal screw-threaded ridge 13. A sealing rib 14 projects radially inward from the skirt above the screw thread-ridge and a flange 17 depends from the top of the closure and is thickened at or adjacent its lower end to form a radially outwardly projecting second sealing rib 18. Additional sealing ribs 20 project downward from the top into the channel formed jointly by the flange 17, skirt 12 and top 11.</p> |
