Plastic resin multi-layer co-extrusion extruder with multi-port plug for selecting order of layers
US5102323A · kind A · utility
8Cited by
11References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1990 |
| Grant date | Apr 7, 1992 |
| Priority date | — |
| Expiry date | Jul 11, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/10
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.