Plastic resin multi-layer co-extrusion extruder with multi-port plug for selecting order of layers
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United States of America Patent
Stats
-
Apr 7, 1992
Issued Date -
N/A
app pub date -
Jul 11, 1990
filing date -
Aug 31, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A plastic resin extruder to co-extrude a multi-layer melt-laminate film including a multi-port diverter plug which selects the orders of the layers by changing the alignment of the plug channels with different pairs of exit and entrance ports. The walls of the plug and its barrel are tapered and the plug is rotatable about its axis. The plug has interconnected indentations which lie between its surface channels with the indentations leading to a weep hole. Resin which leaks from the channels to the indentations is led out the weep hole so that leakage of resin from one surface to another is prevented.
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Cited Art Landscape
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