Abstract: The present invention relates to a turbulence element for use with a rotor and a rotor featuring turbulence elements. The rotor is used in a screening apparatus of the pulp and paper industry. The turbulence element has a longitudinal centerline (CL); two longitudinal edges, a leading edge and a trailing edge; two opposite ends, a first end and a second end; and two surfaces, a top surface and a bottom surface arranged between the leading edge and the trailing edge. The top surface is divided into a leading surface having its origin at the leading edge, and a trailing surface having its origin at the trailing edge. The leading edge and the leading surface are provided with undulations (U).

Abstract: The present invention relates to a turbulence element for use with a rotor and a rotor featuring turbulence elements. The rotor is used in a screening apparatus of the pulp and paper industry. The turbulence element has a longitudinal centerline (CL); two longitudinal edges, a leading edge and a trailing edge; two opposite ends, a first end and a second end; and two surfaces, a top surface and a bottom surface arranged between the leading edge and the trailing edge. The top surface is divided into a leading surface having its origin at the leading edge, and a trailing surface having its origin at the trailing edge. The leading edge and the leading surface are provided with undulations (U).

Abstract: The present invention relates to a screen cylinder that is particularly suitable for screening, filtering, fractionating, or sorting cellulose pulp or fiber suspensions of the pulp and paper industry or other similar suspensions. The present invention relates more particularly to screening devices of the type comprising a plurality of screen wires positioned axially and at a small spacing parallel to each other, and a plurality of bar-wires arranged in a reverse orientation to the screen wires.

Abstract: The present invention relates to a method of manufacturing a screen cylinder, and a screen cylinder that is particularly suitable for screening, filtering, fractionating, or sorting cellulose pulp or fiber suspensions of the pulp and paper making industry, or other similar suspensions. The present invention relates more particularly to screening or filtering devices of the type comprising a plurality of screen wires (10) positioned at a small spacing parallel to each other, the screen wires (10) being fastened into notches in the support elements (20) by means of shrink fitting the screen wires (10) into the notches by heating the second rim area (26) of the support ring (20) after the screen wires (10) have been inserted into the notches.

Abstract: The present invention relates to a turbulence element for use with a rotor and a rotor featuring turbulence elements. The rotor is used in a screening apparatus of the pulp and paper industry. The turbulence element has a longitudinal centerline (CL); two longitudinal edges, a leading edge and a trailing edge; two opposite ends, a first end and a second end; and two surfaces, a top surface and a bottom surface arranged between the leading edge and the trailing edge. The top surface is divided into a leading surface having its origin at the leading edge, and a trailing surface having its origin at the trailing edge. The leading edge and the leading surface are provided with undulations (U).

Abstract: The present invention relates to a screen cylinder that is particularly suitable for screening, filtering, fractionating, or sorting cellulose pulp suspensions of the pulp and paper making industry, or other similar suspensions. The present invention relates more particularly to a screen cylinder formed from a plurality of screen wires leaving screening slots therebetween, and circular support elements. The support elements include openings/grooves for installation of the screen wires therein, so that at least one of the support rings is thermally deformed and clamps the screen wires in the openings/grooves of the rings.

Abstract: The present invention relates to a method of manufacturing a rotor for a screening apparatus and a rotor structure for a screening apparatus. The rotor structure is particularly suitable in screening fiber suspensions of the pulp and paper industry. The apparatus relates to a novel rotor construction, and especially to a novel means of fastening a turbulence element on the rotor surface. The rotor is provided with easily replaceable turbulence elements so that at least a part of the rotor has at least one area —having a surface configuration different from the remaining rotor surface, on which area the turbulence element is fastened.

Abstract: The present invention relates to a method of manufacturing a screen cylinder, and a screen cylinder that is particularly suitable for screening, filtering, fractionating, or sorting cellulose pulp or fiber suspensions of the pulp and paper making industry, or other similar suspensions. The present invention relates more particularly to screening or filtering devices of the type comprising a plurality of screen wires (10) positioned at a small spacing parallel to each other, the screen wires (10) being fastened into notches in the support elements (20) by means of shrink fitting the screen wires (10) into the notches by heating the second rim area (26) of the support ring (20) after the screen wires (10) have been inserted into the notches.

Abstract: The present invention relates to a method of manufacturing a screen cylinder, and a screen cylinder that is particularly suitable for screening, filtering, fractionating, or sorting cellulose pulp suspensions of the pulp and paper making industry, or other similar suspensions. The present invention discusses in particular the manufacture of end rings (48) of a screen cylinder, i.e. rings via which the screen cylinder (10) is connected to the surrounding screen cylinder housing. The end rings (48) of the screen cylinder (10) are formed of a combination of inner non-composite polymeric material (482) acting as glue and an outer massive metal ring (484) utilized as a mold during the manufacturing stage.

Abstract: The present invention relates to a rotor element for use with a rotor and a rotor featuring such rotor elements. The rotor is used in a screening apparatus of the pulp and paper industry. The rotor element (10) has two longitudinal edges, a leading edge (12) and a trailing edge (14); two opposite ends, a first end and a second end; and a surface (18) arranged between the first edge (12) and the second edge (14). The surface (18) is divided by a borderline (20) into a leading surface (22) having its origin at the first edge (12), and a trailing surface (24) having its origin at the second edge (14). A distance (W1) is provided between the borderline (20) and the first edge (12) that is smaller at the first end of the rotor element (10) than at the second end of the rotor element (10).

Abstract: The present invention relates to a rotor element for use with a rotor and a rotor featuring said elements. The rotor is used in a screening apparatus of the pulp and paper industry. The rotor element (10) has two longitudinal edges, a first, so-called leading edge (12) and a second, so-called trailing edge (14); two opposite ends, a first end and a second end; and a surface (18) arranged between said first edge (12) and said second edge (14), said surface (18) being divided by means of a borderline (20) into a first, so called leading surface (22) having its origin at said first edge (12), and a second, so called trailing surface (24) having its origin at said second edge (14), where a distance (W1) between said borderline (20) and said first edge (12) is smaller at said first end of said rotor element (10) than at the second end of said rotor element (10).