Abstract: A processing plate (4, 12) for mechanically processing pulp. The plate has projecting parts (6, 7, 14, 15). The projecting parts (7, 15) have a radially inner part (28) having an inclined ascending wall (29) towards the outer periphery (23) of the plate and a radially outer part (30) having an inclined descending wall (31) towards the outer periphery (23) of the plate (4, 12). The inner and outer parts (28, 30) are radially coupled to each other by a ridge (32) along a coupling line (CL). The walls (29, 31) are mutually connected only partly so that they have in common only a crest section (40) of the ridge (32) which crest section (40) is less than a width of at least one of the wall (29) of the inner part (28) and the wall (31) of the outer part (30) at the coupling line (CL).

Abstract: Arrangements for a frequency adjustable filter, which includes at least a housing, which includes one or more cavities closed by a lid above the housing are disclosed. In an arrangement, there is, per a cavity forming a resonator, a first resonator element extending from the lid, a second resonator element extending from the bottom, the second resonator element partially overlapping the first resonator element, an adjusting bar extending inside an area in which the first and the second resonator elements are overlapping, the adjusting bar being arranged to move within said area, a first hole either in the lid or in the bottom, a driving shaft, and an actuator arranged to move the adjusting bar through the first hole by means of the driving shaft. At least the first resonator element, the second resonator element and the adjusting bar are positioned to have a common vertical central axis.

Abstract: A processing plate (4, 12) for mechanically processing pulp. The plate has projecting parts (6, 7, 14, 15). The projecting parts (7, 15) comprise a radially inner part (28) having an inclined ascending wall (29) towards the outer periphery (23) of the plate and a radially outer part (30) having an inclined descending wall (31) towards the outer periphery (23) of the plate (4, 12). The inner and outer parts (28, 30) are radially coupled to each other by a ridge (32) along a coupling line (CL). The walls (29, 31) are mutually connected only partly so that they have in common only a crest section (40) of the ridge (32) which crest section (40) is less than a width of at least one of the wall (29) of the inner part (28) and the wall (31) of the outer part (30) at the coupling line (CL).

Abstract: A blade element (1) for a refiner for refining fibrous material comprises a refining surface (3) provided with blade bars (8, 10) and blade grooves (9, 11) there-between. The blade bars (8, 10) have side walls (8?, 8??) facing away from one another. The side walls (8?, 8??) of the at least one blade bar (8) comprise on both of its side walls (8?, 8??) steps (14?, 14??) which extend at least partly in the transversal direction relative to the side walls (8?, 8??) of the blade bar (8) and away from one another.

Abstract: A single-disc refiner (1) has a stationary refining element (2) and an opposed rotatable refining element (12), each of which has a radially inner blade element (4, 14) providing an inner refining surface area and a radially outer blade element providing an outer refining surface area. The inner and outer refining surface areas of each refining element together provide a refining surface of the refining element, the refining surfaces defining a feed zone (29) followed by a treatment zone (30) with a transition point therebetween located at a radial distance of 70-90% from the center of the refiner or at a radial distance of 50-80% from the innermost edge (25, 27) of the refining element or at a radial distance of 20-50% from the inner edge (34) of the outer blade element (8, 18, 33) towards the outermost edge (26, 28, 35) of the refining element.

Abstract: A blade element (1) for a refiner for refining fibrous material comprises a refining surface (3) provided with blade bars (8, 10) and blade grooves (9, 11) there-between. The blade bars (8, 10) have side walls (8?, 8??) facing away from one another. The side walls (8?, 8??) of the at least one blade bar (8) comprise on both of its side walls (8?, 8??) steps (14?, 14??) which extend at least partly in the transversal direction relative to the side walls (8?, 8??) of the blade bar (8) and away from one another.

Abstract: A refiner (1, 2, 3) for refining fibrous material. And a blade element (18) for a refiner (1, 2, 3) intended for refining fibrous material. The blade element (18) having a refining surface (18?), which has blade bars (21, 23) and blade grooves (22, 24) between them. The top surface of at least one blade bar (21, 23) is provided with refining grits (25). The blade element (18) has portions (29, 30) forming a protruding part extending away above the refining surface (26a, 26b) and above the blade bars (21, 23) or the refining grits (25) on the refining surface.

Abstract: A single-disc refiner (1) has a stationary refining element (2) and an opposed rotatable refining element (12), each of which has a radially inner blade element (4, 14) providing an inner refining surface area and a radially outer blade element providing an outer refining surface area. The inner and outer refining surface areas of each refining element together provide a refining surface of the refining element, the refining surfaces defining a feed zone (29) followed by a treatment zone (30) with a transition point therebetween located at a radial distance of 70-90% from the center of the refiner or at a radial distance of 50-80% from the innermost edge (25, 27) of the refining element or at a radial distance of 20-50% from the inner edge (34) of the outer blade element (8, 18, 33) towards the outermost edge (26, 28, 35) of the refining element.

Abstract: A blade element (20) for a conical portion (4) of a stator (2) of a refiner (1). The blade element (20) has a feed end (24), a discharge end (25), and a refining surface (21) which has a feed zone (26) at the feed end (24) of the blade element (20). The feed zone (26) of the blade element (20) has at least one guide groove (29) extending from the feed end (24) toward the discharge end (25) for guiding a flow of material to be refined from the feed end (24) toward the discharge end (25). The depth of the guide groove (29) is arranged to change in a direction transverse in relation to the extending direction of the guide groove (29).

Abstract: A refiner (1, 2, 3) for refining fibrous material. And a blade element (18) for a refiner (1, 2, 3) intended for refining fibrous material. The blade element (18) comprises a refining surface (18?), which comprises blade bars (21, 23) and blade grooves (22, 24) between them. The top surface of at least one blade bar (21, 23) is provided with refining grits (25). The blade element (18) has portions (29, 30) forming a protruding part extending away above the refining surface (26a, 26b) and above the blade bars (21, 23) or the refining grits (25) on the refining surface.

Abstract: A blade element (20) for a conical portion (4) of a stator (2) of a refiner (1). The blade element (20) has a feed end (24), a discharge end (25), and a refining surface (21) which has a feed zone (26) at the feed end (24) of the blade element (20). The feed zone (26) of the blade element (20) has at least one guide groove (29) extending from the feed end (24) toward the discharge end (25) for guiding a flow of material to be refined from the feed end (24) toward the discharge end (25). The depth of the guide groove (29) is arranged to change in a direction transverse in relation to the extending direction of the guide groove (29).

Abstract: A refiner (1) comprising a stator (2) and a rotor (4). The stator (2) and the rotor (4) comprise a flat portion (7, 9) and a conical portion (8, 10). The conical portion has a first end (17) of smaller diameter (D1) and a second end (18) of greater diameter (D2) such that the first end is directed towards the flat portion and the second end is directed away from the flat portion. The refining surface (12) of the conical portion of the stator comprises at least an outer zone (23) arranged at the second end of the conical portion and an inner zone (22) arranged relative to the outer zone on the side of the first end of the conical portion. A portion of the length of the blade bars (20) in the outer zone are arranged relative to the rotation direction (RD) of the rotor such that they have a retentive effect on the material to be refined. Also a blade segment (19) for a conical portion of a stator of a refiner.

Abstract: A refining surface (2) of a refiner stator (4) for a refiner for defibrating lignocellulose-containing material has a feed edge (17) oriented in the direction of the feed flow of the material to be refined, and a discharge edge (16) oriented in the direction of the discharge flow of the material refined. The surface (2) has blade bars (10) with grooves (11) therebetween, and at least one dam (12) in a groove (11). The dam has an upwardly rising guiding surface (13) from the blade groove bottom (15) for guiding the material to be refined and the material already refined out of the blade groove. The upward direction of the guiding surface (13) is from the direction of the discharge edge (16) of the refining surface (2) in the direction of the feed edge (17) of the refining surface (2).

Abstract: A refiner (1) comprising a stator (2) and a rotor (6) that comprise a planar portion and a conical portion after the planar portion, which in turn comprise refining surfaces (4, 8) provided with blade bars (15, 18, 24) and blade grooves (16, 19, 25) therebetween, and the planar portions (4?, 81) of the refining surfaces (4, 8) of the stator (2) and the rotor (6) comprising at least two refining zones (14, 17, 23) in the direction of the radius (R) of the planar portion.

Abstract: A refining surface (2) of a refiner stator (4) for a refiner for defibrating lignocellulose-containing material has a feed edge (17) oriented in the direction of the feed flow of the material to be refined, and a discharge edge (16) oriented in the direction of the discharge flow of the material refined. The surface (2) has blade bars (10) with grooves (11) therebetween, and at least one dam (12) in a groove (11). The dam has an upwardly rising guiding surface (13) from the blade groove bottom (15) for guiding the material to be refined and the material already refined out of the blade groove. The upward direction of the guiding surface (13) is from the direction of the discharge edge (16) of the refining surface (2) in the direction of the feed edge (17) of the refining surface (2).

Abstract: A refiner (1) comprising a stator (2) and a rotor (4). The stator (2) and the rotor (4) comprise a flat portion (7, 9) and a conical portion (8, 10). The conical portion has a first end (17) of smaller diameter (D1) and a second end (18) of greater diameter (D2) such that the first end is directed towards the flat portion and the second end is directed away from the flat portion. The refining surface (12) of the conical portion of the stator comprises at least an outer zone (23) arranged at the second end of the conical portion and an inner zone (22) arranged relative to the outer zone on the side of the first end of the conical portion. A portion of the length of the blade bars (20) in the outer zone are arranged relative to the rotation direction (RD) of the rotor such that they have a retentive effect on the material to be refined. Also a blade segment (19) for a conical portion of a stator of a refiner.

Abstract: A refiner (1) comprising a stator (2) and a rotor (6) that comprise a planar portion and a conical portion after the planar portion, which in turn comprise refining surfaces (4, 8) provided with blade bars (15, 18, 24) and blade grooves (16, 19, 25) therebetween, and the planar portions (4?, 81) of the refining surfaces (4, 8) of the stator (2) and the rotor (6) comprising at least two refining zones (14, 17, 23) in the direction of the radius (R) of the planar portion.

Abstract: A refining surface of a refining member, adapted for use with a refiner for defibrating a lignocellulose-containing material, is provided. Such a refining surface comprises a plurality of first grooves, each first groove being defined between two adjacent first bar portions of the refining surface, and extending between opposing first and second radial edges of the refining surface. The refining surface further comprises a plurality of second grooves, each second groove being defined between two adjacent second bar portions of the refining surface forming each first bar portion, and extending between two adjacent second grooves. The first bar portions are wider than the second bar portions, and each second bar portion are between about 1 mm and about 3 mm wide. A blade segment of a refining member is also provided.

Abstract: A refining surface of a refining member, adapted for use with a refiner for defibrating a lignocellulose-containing material, is provided. Such a refining surface comprises a plurality of first grooves, each first groove being defined between two adjacent first bar portions of the refining surface, and extending between opposing first and second radial edges of the refining surface. The refining surface further comprises a plurality of second grooves, each second groove being defined between two adjacent second bar portions of the refining surface forming each first bar portion, and extending between two adjacent second grooves. The first bar portions are wider than the second bar portions, and each second bar portion are between about 1 mm and about 3 mm wide. A blade segment of a refining member is also provided.

Abstract: A refining surface for a refiner intended for defibrating lignocellulose-containing materials, the refiner having at least two refining surfaces arranged coaxially relative to each other, at least one of which rotates around a shaft, and between which the material to be defibrated is fed. The refining surfaces define grooves and between them ridges, at least part of the refining surface ridges being formed of at least two different ridge parts connected to each other in such a way that one ridge part is farther ahead in the rotation direction of the refining surface than the other ridge part. Further, at least in some ridge parts, the front wall in the rotation direction of the refining surface is over at least part of its length substantially inclined.