Refiner segment in a fiber refiner
US10767309B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 2018 |
| Grant date | Sep 8, 2020 |
| Priority date | — |
| Expiry date | Nov 29, 2038 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21D1/306
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A refiner segment (4) for a refiner (1) intended for refining fibrous material (7) has a refining surface and is arrangeable to form a part of a refining surface of a refiner element (2; 3) in the refiner (1). The refiner segment (4) is provided with a pattern of bars (10) and intermediate grooves (11) extending along the refiner segment (4) in a substantially radial direction, and dams (12) extending between the bars (10) and protruding above the surface of the grooves (11). Steam channels (13) are arranged through the bars (10) adjacent to an intersection between a bar (10) and a dam (12), radially outside of a respective dam (12) with respect to an inner edge (41) of the refiner segment (4), and at a trailing end of the respective dam (12) with respect to a first circumferential direction corresponding to an intended travelling direction (20) of the refiner segment (4), where the steam channels (13) are configured to allow steam (8) flowing towards the inner edge (41) of the refiner segment (4) to pass through the steam channels (13) in a direction having a component directed opposite to the first circumferential direction (20).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.