Method for pelletizing wood particulate matter
US4260573A · kind A · utility
Inventor
Key dates
| Filing date | Feb 7, 1980 |
| Grant date | Apr 7, 1981 |
| Priority date | — |
| Expiry date | Feb 7, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB27N3/24
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for forming pellets from wood particulate material: The apparatus comprises one or more parallel aligned, elongated dies formed by first and second aligned and mating continuous belts comprising a plurality of pads linked together. At least one of the belts has pads that contains a plurality of parallel longitudinal grooves in their free surface and the pads of the other belt are confrontingly aligned with the free surface of the pads of the first-mentioned continuous belt, to form the elongated dies. The wood particulate material, containing from 12 to 20% water, is cut, compacted, extruded and autogenously heated in the elongated dies by simultaneously rotating one of the belts counterclockwise and the other belt clockwise at respectively rotational speeds such that the linear speed of one of the belts is greater than the linear speed of the other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.