Tri-injection of hollow articles
US4808101A · kind A · utility
51Cited by
3References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 1987 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | May 18, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/1656
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Apparatus for tri-injecting a plurality of thermoplastic materials to mold an article having a layered wall structure using thermoplastic materials having different optimum processing temperatures including the maintenance of the optimum temperatures in flow paths individual to each material from its source at least to the injection nozzle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.