Polymer diverter system for metal pipe having an integrally formed polymer liner
US5607530A · kind A · utility
8Cited by
17References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1995 |
| Grant date | Mar 4, 1997 |
| Priority date | — |
| Expiry date | Aug 9, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/24
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for applying polymer to metal pipe during the pipe forming process has a pump for pumping the polymer, a first extruder die receiving polymer from the pump and configured to apply polymer to metal pipe as the metal pipe is being formed from metal stock, and a second extruder die for forming pipe couplers. A valve effects diversion of the polymer from the first extruder die to the second extruder die when a stoppage of the pipe forming process occurs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.