Process for upgrading plastic material
US6852256B2 · kind B2 · utility
46Cited by
17References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2001 |
| Grant date | Feb 8, 2005 |
| Priority date | — |
| Expiry date | Mar 11, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/92
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In a process for upgrading cleaned used plastic material to be reclaimed, all steps are performed in a continuous way so as to extrude continuously the plastic material to provide elongated strands thereof, cutting the strands continuously as they are supplied by extrusion to convert them into pellets. Then, the pellets are fed without any intermediate storage to a continuous crystallizer in a stream of hot gas to heat the pellets to crystallizing temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.