Apparatus for forming multilayer thermoplastic resin extrusions
US4611987A · kind A · utility
9Cited by
11References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1984 |
| Grant date | Sep 16, 1986 |
| Priority date | — |
| Expiry date | Jul 23, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/49
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injector device for use in forming multilayer extrusions of plastic resins and a method for forming such extrusions. The apparatus includes an injector member that divides the extrudate from the first extruder into two layers and receives at least one extrudate from an additional extruder that is interposed by the injector member between the divided layers of the extrudate from the first extruder. The process includes producing plasticized resin by a first extruder, dividing the extrudate into two layers, producing extrudate from a second extruder, and injecting such extrudate between the two layers of the first extrudate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.