| 发明名称 |
METHOD OF, AND A DEVICE FOR FORMING A BELL END ON A PIPE, AND PIPE COMPRISING A BELL END WHEN MANUFACTURED BY THE OD |
| 摘要 |
<p>A bell end on a pipe of thermoplastic material has variable wall thickness in the axial direction, the maximum being where the inner wall acts as a sealing face. The bell end can be formed by upsetting the pipe wall into the cavity between a mandril and a shaping sleeve.</p> |
| 申请公布号 |
CA1032201(A) |
申请公布日期 |
1978.05.30 |
| 申请号 |
CA19760246518 |
申请日期 |
1976.02.25 |
| 申请人 |
POLVA NEDERLAND B.V. |
发明人 |
ACDA, PETRUS M.;KARREMAN, JACOB |
| 分类号 |
B21D41/02;B21D19/00;B29C57/02;F16L9/00;F16L9/12;F16L21/02;F16L47/10 |
主分类号 |
B21D41/02 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
