| 摘要 |
<p>A composite gasket for forming a seal between a pipe bell (52) and a spigot (58) comprises a major portion (12) of non-elastomeric plastic material and a minor portion (14) of elastomeric material. The minor portion is axially encased by the major portion. The minor portion includes a sealing lip (16) extending radially inwardly from the major portion. The compositie gasket can be manually inserted within a preformed grooved bell or the grooved bell can be formed over the gasket while the gasket is mounted on a mandrel. The composite gasket is particularly useful with relatively large diameter pipe systems.</p> |
