Extrusion process of polytetrafluoroethylene tubing materials and apparatus therefor
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United States of America Patent
Stats
-
Sep 30, 1980
Issued Date -
N/A
app pub date -
Sep 22, 1978
filing date -
Dec 15, 1975
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
This application relates to a paste extrusion process using a ram type extruder wherein at least one, preferably both, of the die and mandrel of the extruder are rotated, in opposite directions when both are rotated. In preferred embodiments, the material being extruded is polytetrafluoroethylene, the mandrel has a smooth surface and the end portion of the die is heated.
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Family
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- Non-US Classification not provided for expired patents
Cited Art Landscape
Patent Citation Ranking
- Citation Ranking not provided for expired patents
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