Friction washer that cleans plastic for recycling
US9968971B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2014 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | Dec 5, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02W30/62
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of cleaning plastic chips includes introducing a mixture of plastic chips and water to an in-feed of a housing. The mixture of plastic chips and water is impelled from the in-feed within the housing and agitated so that debris on the plastic chips is abraded by adjacent chips and agitators until substantially all debris has been removed from the plastic chips. Water and debris are discharged through a screen to a debris discharge. Cleaned plastic chips are discharged to a plastic chip discharge that is further from the in-feed than the debris discharge. Chip discharge takes place when the pressure of the plastic chips at the plastic chip discharge exceeds a threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.