Commingled waste separation apparatus and methods
US5344025A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1991 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Apr 24, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S209/93
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Separation apparatus and methods separate ferrous, glass, plastic and aluminum articles in kind from each other when all articles are presented in a commingled stream. Ferrous articles are first removed by magnetic apparatus. The remaining commingled stream of glass, plastic and aluminum articles are conveyed over a vibratory screen for removal or residue materials not first removed prior to ferrous article separation. Plastic and aluminum articles are lifted away from glass articles in a vertically moving air column of a closed loop air flow system. The glass is conveyed past the column for further separation and collection while the plastic and aluminum articles are discharged together from a centrifugal classifier portion of the closed air loop. Large plastic articles are first removed from the combined plastic and aluminum, then aluminum articles are separated from the remaining smaller plastic articles. Aluminum articles are collected while the larger and smaller plastic articles are recombined, compacted and collected. Plastic and aluminum are alternately separated by a trommel. Alternative component layouts are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.