Plastic resin multi-layer co-extrusion extruder with multi-port

Details Plastic resin multi-layer co-extrusion extruder with multi-port Plastic resin multi-layer co-extrusion extruder with multi-port

1990-07-11

1992-04-07

Thurlow, Jeffery

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

Extrusion shaping means

2641761, 264349, 4251311, 425190, 4253823, 425463, 425215, B29C 4706, B29C 4770

Patent

active

051023237

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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patent: 3389434 (1968-06-01), Cleereman et al.
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patent: 4094947 (1978-06-01), Alfrey, Jr. et al.
patent: 4316710 (1982-02-01), Greenwood
patent: 4336213 (1982-06-01), Fox
patent: 4403934 (1983-09-01), Rasmussen et al.
patent: 4761129 (1988-08-01), Aste et al.
patent: 4784815 (1988-11-01), Cloeren et al.
patent: 4832960 (1989-05-01), Compagnon

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