Refiner segment in a fiber refiner
US10927499B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 12, 2018 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | May 28, 2039 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21D1/306
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A refiner segment for a refiner comprising refining zones provided with a pattern of bars arranged at a respective pumping feeding angle within a respective refining zone, and intermediate grooves between the bars, and dams extending between the bars and protruding above the surface of the grooves. The dams are arranged at least at the ends of at least some of the bars at the borders between the refining zones. Openings are formed at the borders between the refining zones, radially outside of the dams, where the openings are arranged such that a respective angle is formed between an imaginary line connecting the openings and a line which is perpendicular to a radius of the refiner segment, where the angle is directed towards the inner edge of the refiner segment, thereby allowing steam to pass through the openings and flow towards an inner edge of the refiner segment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.