Abrégé

The present invention relates to a screen cylinder (100) that is particularly suitable for screening, filtering, fractionating, or sorting cellulose pulp or fibre 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 (30) positioned axially and at a small spacing parallel to each other, and a plurality of bar-wires (32) arranged in a reverse orientation to the screen wires (30).

Classes IPC  ?

• D21D 5/16 - Cylindres et platines pour épurateurs

Abrégé

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.

Classes IPC  ?

• B01D 29/13 - Éléments filtrants avec des supports
• D21D 5/16 - Cylindres et platines pour épurateurs

Abrégé

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 a longitudinal centreline CL; two longitudinal edges, i.e. a leading edge (12) and a trailing edge (14); two opposite ends (22, 24), i.e. a first end and a second end; and two surfaces, i.e. a top surface and a bottom surface (20) arranged between the leading edge (12) and the trailing edge (14); the top surface being divided into a leading surface (18) having its origin at the leading edge (12), and a trailing surface (16) having its origin at the trailing edge (14), the leading edge (12) and the leading surface (18) being provided with undulations (U).

Classes IPC  ?

• D21D 5/02 - Épuration de la pâte
• D21D 5/06 - Tambours épurateurs rotatifs

Abrégé

The present invention relates to a screening apparatus for the pulp and paper industry. The screening apparatus includes a turbulence element has a longitudinal centerline, a leading edge and a trailing edge, a first end and a second end, and two surfaces, i.e. a top surface and a bottom surface. 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. The leading surface forms an acute angle with the bottom surface of the turbulence element for the entire length (L) thereof. The acute angle and undulations help to keep the screen surface clean and require less power to operate.

Classes IPC  ?

• D21D 5/02 - Épuration de la pâte
• D21D 5/06 - Tambours épurateurs rotatifs

Abrégé

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.

Classes IPC  ?

• D21D 5/16 - Cylindres et platines pour épurateurs
• B07B 1/00 - Criblage, tamisage ou triage des matériaux solides au moyen de treillis, grilles ou systèmes analogues

Abrégé

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) evenly and uniformly after the screen wires (10) have been inserted into the notches.

Classes IPC  ?

• D21D 5/16 - Cylindres et platines pour épurateurs

Abrégé

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) evenly and uniformly after the screen wires (10) have been inserted into the notches.

Classes IPC  ?

• D21D 5/16 - Cylindres et platines pour épurateurs

Abrégé

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.

Classes IPC  ?

• B23P 15/16 - Fabrication d'objets déterminés par des opérations non couvertes par une seule autre sous-classe ou un groupe de la présente sous-classe de plaques avec trous de très petit diamètre, p. ex. pour buses de filage ou de brûleurs

Abrégé

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 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.

Classes IPC  ?

• B23P 15/16 - Fabrication d'objets déterminés par des opérations non couvertes par une seule autre sous-classe ou un groupe de la présente sous-classe de plaques avec trous de très petit diamètre, p. ex. pour buses de filage ou de brûleurs

Abrégé

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 relates more particularly to a screen cylinder being formed of at least a number of screen wires (10) leaving a screening slot therebetween, and circular support elements (20), said support elements (20) having openings/ grooves for installation of said screen wires (10) therein, so that at least one of said support rings (20) is bent for clamping said screen wires (10) in said openings/grooves of said rings (20).

Classes IPC  ?

• D21D 5/16 - Cylindres et platines pour épurateurs