Rotating disc wood chip refiner
US4712745A · kind A · utility
27Cited by
2References
9Claims
0Family size
Inventor
Key dates
| Filing date | Aug 19, 1985 |
| Grant date | Dec 15, 1987 |
| Priority date | — |
| Expiry date | Aug 19, 2005 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21D1/30
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
In a rotating disc wood chip refiner having a number of refiner plates with a grid of radial bars and slots with a multiplicity of dams in the slots, the dams are spaced in outwards decreasing increments forming a continuous series of resonant cavities, and the radial bars are radially and uniformly skewed backwards at a radial angle of about 1.5 degrees to disc rotation. These improvements provide a reduced energy input by means of a resonating cavity flow regime, together with a low fluid-dynamic drag radial bar profile and a pressure recovery radial slot profile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.