Refiner plate segment with pre-dam
AssigneeValmet Corporation
InventorThommy Lindblom
Life of this patent
Estimating the term…
Abstract
The invention relates to a refiner plate segment in a refiner plate for mechanically refining of lignocellulosic material in a refiner, said refiner plate segment comprising at least a first, generally radially extending bar, a second, generally radially extending bar, a groove arranged and defined between said first, generally radially extending bar and said second, generally radially extending bar, and a main dam, which has a height H and is arranged in the groove, wherein a pre-dam is arranged in front of the main dam, said pre-dam has a height h which is less than the height H of the main dam.
Claims8
A refiner plate segment in a refiner plate for mechanically refining of lignocellulosic material in a refiner, said refiner plate segment comprising at least:
- a first, generally radially extending bar,
- a second, generally radially extending bar
- a groove arranged and defined between said first, generally radially extending bar and said second, generally radially extending bar,
- a main dam, which has a height H and is arranged in the groove, and a pre-dam arranged in front of the main dam, said pre-dam having a height h which is less than the height H of the main dam, the pre-dam being arranged a distance L in front of the main dam, where L is measured from a leading edge of the pre-dam to a leading edge of the main dam and where (H−h)≤L≤3(H−h).
A refiner plate for mechanically refining of lignocellulosic material in a refiner, said refiner plate comprising at least:
- a first, generally radially extending bar,
- a second, generally radially extending bar
- a groove arranged and defined between said first, generally radially extending bar and said second, generally radially extending bar,
- a main dam, which has a height H and is arranged in the groove and a pre-dam arranged in front of the main dam, said pre-dam having a height h which is less than the height H of the main dam, and the pre-dam is arranged a distance L in front of the main dam where L is measured from a leading edge of the pre-dam to a leading edge of the main dam and where (H−h)≤L≤3(H−h).
Dependencies are inferred from the claim text.