| 摘要 |
A connector (10') for corrugated pipe (20) comprises a sleeve, ledges (16) in the sleeve to engage with corrugations on the pipe to prevent pull-out of the pipe from the sleeve, and a seal (22'/22") moulded into said sleeve and being long enough to span at least two corrugations, whereby the seal will always contact a peak (30, 32) of said corrugations. Alternatively, at least two seals (22") are moulded into the sleeve at spaced positions so that when the pipe is inserted into the connector one or other seal contacts a peak of said corrugations. A method of making such a seal comprises the steps of moulding said sleeve in a mould (100) comprising a sleeve core (54, 56) and an openable cavity (52), an aperture (66) being formed in the sleeve so moulded, and subsequently moulding said seal by injection of thermoplastic elastomer through said aperture into an annular space (80) defined between said sleeve and a seal core (54', 56') said space coinciding with said aperture.
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