Wood chip classifying system
US4789068A · kind A · utility
16Cited by
14References
7Claims
0Family size
Inventor
Key dates
| Filing date | May 14, 1986 |
| Grant date | Dec 6, 1988 |
| Priority date | — |
| Expiry date | May 14, 2006 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21B1/023
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A multi-stage apparatus and process for separating wood chips of a desired size range for pulp production, from an intermixture of materials e.g. from a log chipper. A disc screen screens out the chips and other materials having a size larger than the designated size range. The chips are deposited on an air separating screen through which a vacuum is drawn to draw out the smaller size materials, e.g. sawdust, and to deposit the desired pulp chips for collection and conveyence to the paper processing station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.