Voith Patent Gmbh

J. M. Voith Gmbh

Voith Sulzer Papiermaschinen Gmbh

Voith Sulzer Papiertechnik Patent Gmbh

Voith Sulzer Stoffaufbereitung Gmbh

Thomas Martin

Martin Kemper

Zygmunt Madrzak

Wolfgang Ruf

Herbert Holik

Michael Trefz

Matthias Wohlfahrt

Hans-Dieter Dorflinger

Harald Selder

Herbert Britz

Roland Thomas

Anton Selbherr

Heiko Held

José Luiz Campos Souza

Cordts Monteiro Wagner

Michael Jerabek

Dominik Marusa

The invention relates to a roller for producing a fibrous web, in particular a paper web including a rotationally symmetrical base body which is rotatable about a longitudinal axis and has a shell surface on which there are arranged at least two elastically deformable and/or deflectable ring-shaped lamellas which extend away from the shell surface in the radial direction and which surround the base body in the circumferential direction, wherein the lamellas are arranged at least in sections at an angle relative to a center plane of the roller aligned perpendicular to the longitudinal axis of the roller, thus forming an angle of inclination.

Roller

A device and a method for the production of a fiber mat is suitable in particular for use in the production of packaging board or fibrous construction elements, from a fibrous source material. The method includes providing the fibrous source material, low-water processing of the fibrous source material in an airflow into raw material including individual fibers and/or fiber bundles, forming of the individual fibers and/or fiber bundles in the airflow by a dry forming method into a fiber mat in such a way that a spatial or three-dimensional structure is formed by the fiber mat and consolidation of the formed fiber mat. The specific volume of the fiber mat is greater than 1.6 cm/g, in particular greater than 2 cm/g, preferably greater than 3 cm/g, and the fiber mat thickness &#x2265;1 mm, in particular &#x2265;1.5 mm, preferably &#x2265;2 mm.

Method and device for the production of a fibrous material web in a papermaking machine

The process targets the removal of interfering materials from an aqueous fibrous material suspension, especially if this is produced from recycled paper. Thereby interfering materials, such as printing ink particles, small synthetic particles, or sticky contamination, are eliminated by flotation in a particularly advantageous manner. In accordance with the invention, the combination of low-intensity and high-intensity flotation is undertaken, whereby the low-intensity flotation generally works in the gravitational field and the high-intensity flotation in a centrifugal field.

Process for treating a fibrous material suspension using combination of low-intensity and high-intensity flotation

A reeling machine for winding a web, in particular a paper or cardboard web, for the formation of a wound web roll on a reel-spool, with a reeling drum, which forms a winding nip with the wound web roll and with at least one separating mechanism, which separates the web in a separating area. In the reeling machine, the separating mechanism is advanced before the separating process--as seen in vertical direction--from above to the separating area, which lies at a short distance to the outer periphery of the new reel-spool and/or--as seen in run direction of the web--to the winding nip between the reeling drum and the new reel-spool.

Reeling machine and a process to reel a web

An apparatus for selective particle flotation includes a static mixer connected to a flotation section in lieu thereof of the apparatus. The static mixer is disposed upstream of the flotation section in lieu thereof with respect to a direction of fluid flow through the apparatus. The static mixer mixes sludge with small gas bubbles. A flotation cyclone is disposed in an upstream portion of the flotation section in lieu thereof with respect to the direction of fluid flow through the apparatus. The flotation cyclone is the initial separation device through which the sludge flows.

Flotation apparatus

A wet cyclone having a slender body with a truncated cone at an end thereof includes a heavy fraction outlet at an apex of the truncated cone and an immersion tube on the other end of the body. The immersion tube is cylindrical for withdrawal of a light non-gaseous fraction. A diffuser within the immersion tube deflects the flow within the tube for recovery of pressure head. The diffuser is disposed at a distance from the inlet end of the immersion tube of at least about half the inside diameter of the immersion tube.

Cyclone including an inlet diffuser tube

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Langenau, Germany

Thomas Martin