Extrusion die apparatus and process for producing tubular film from thermoplastic molten material
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United States of America Patent
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Jun 5, 1990
Grant Date -
N/A
app pub date -
Jan 23, 1989
filing date -
Jan 23, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and process for producing tubular film from thermoplastic molten material including a tubular housing having an axially-aligned interior defined inner surface, an elongated member including an outer surface disposed within the inner surface of the housing and spaced therefrom providing a passageway, and an alignment member having a plurality of annularly-spaced feed ports defining an inside surface, the alignment member securely connecting the elongated member to the housing, wherein the inner surface of the housing, the outer surface of the elongated member and the plurality of annularly-spaced feed ports define an annular-axially aligned passageway for allowing a balanced flow of thermoplastic material therethrough.
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