Method and apparatus for refining fibrous material
US4754935A · kind A · utility
12Cited by
2References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 10, 1987 |
| Grant date | Jul 5, 1988 |
| Priority date | — |
| Expiry date | Apr 10, 2007 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21D1/22
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A refiner has a frusto-conically shaped grinding zone located between an outer housing and an inner frusto-conical rotor. The rotor has suitable openings for removing steam from the grinding zone inwardly into an interior chamber within the rotor. Multiple separation stages are provided in the rotor and between it and the housing, respectively, whereby separation of the steam and any following fibrous material particles is effected. By removing the steam from the grinding zone, increased retention time of the fibrous material in the grinding zone and increased production is effected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.