Polymer diverter system for metal pipe having an integrally formed polymer liner
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United States of America Patent
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-
Mar 4, 1997
Grant Date -
N/A
app pub date -
Aug 9, 1995
filing date -
Aug 9, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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