Abstract: A method and device for moisture profiling of a fibrous material web to be dried in machines for manufacturing and/or refining this web that includes subjecting the fibrous material web to electromagnetic waves in the form of microwaves and/or high-frequency waves.

Abstract: Process and apparatus for degassing a flowing fibrous paper suspension. The process includes separating the suspension into partial streams, spraying the partial streams into a degassing chamber under vacuum, and exposing the suspension to the degassing vacuum for at least 10 seconds. In this manner, gas within the suspension is separated from the suspension. The process also includes suctioning the separated gas out of the degassing chamber. The apparatus includes a degassing chamber structured to subject the suspension to a vacuum sufficient for degassing, an element arranged at an inlet of said degassing chamber for dividing the suspension into a plurality of partial streams, and a suction device for removing separated gas from said degassing chamber. The apparatus is structured and arranged so that the suspension is subjected to the degassing vacuum for a duration of at least 10 seconds.

Abstract: A process of transporting at least a portion of a web from a first structure to a second structure via an apparatus that includes at least two pulleys located at spaced locations from each other, an air-pervious endless belt positioned to run from the first structure to the second structure, an underpressure source arranged to produce an underpressure adjacent to the run of the endless belt, a nose shoe disposed beyond the second pulley and spaced from the second pulley, thereby defining an opening. The nose shoe has an inlet and air jet outlet positioned adjacent the second pulley. A guiding tray is arranged beyond the nose shoe having an upstream section positioned adjacent the nose shoe, and the upstream section includes an air slot, which extends cross-wise to a web travel direction.

Abstract: Press device and process for treating a material web. The press device includes a first shoe press and a second shoe press. The first and the second shoe press are successively arranged in a web run direction. A transfer suction roll is positioned between the first shoe press and the second shoe press and is adapted to at least partially suction the material web and to guide the material web in a closed draw through at least one of the first and the second shoe presses. The process may includes at least partially suctioning the material web with the transfer suction roll, and guiding the material web in a closed draw through at least one of the first and the second shoe presses.

Abstract: A gravure paper and a method of manufacturing gravure paper having a maximal roughness depth of approximately 1.40 &mgr;m. The method utilizes a paper machine including a forming system, a first press section, and a drying section, and includes producing a stock suspension including a stock having a freeness of greater than or equal to approximately 50 ml CSF, forming an unfinished fibrous material web from the stock suspension, and applying at least one of a pigment and a filler slurry to the unfinished fibrous material web between a beginning of the forming system and a position at which the dry matter content of the unfinished fibrous material web is approximately ≦90%.

Abstract: Method for forming a continuous web on a forming fabric includes providing a pressurized chamber, processing the forming fabric through the pressurized chamber, and distributing a pressurized flow of a slurry having a first composition in the pressurized chamber across the width of the forming fabric to form the continuous web.

Abstract: The present invention provides a press jacket of a press device and a method for treating a material web, in particular a paper or cardboard web, in a nip, where the press jacket has an outer circumferential surface that is provided with grooves and/or blind bores. The grooves and/or bores include a side wall having an the opening region with a bevel and/or a rounded section that extends along a curved line, in order to counteract a volume reduction that occurs when the press device is loaded.

Abstract: An apparatus for processing a continuous web having a first side and a second side includes a plurality of rollers are arranged for cooperative rotation. The plurality of rollers are positioned to define a corresponding plurality of nips. The continuous web is processed through at least two of the plurality of nips. At least a first roller of the plurality of rollers has at least one void formed in the cylindrical middle surface. First and second sealing panels engage first and second circular ends of each of the plurality of rollers and define a chamber. A first pressure source is fluidly coupled to the chamber to pressurize the chamber. A membrane is positioned adjacent the first side of the continuous web to separate the continuous web from direct communication with the chamber.

Abstract: Process and device for the flotation of contaminates out of an aqueous fibrous suspension using a foam. The process includes creating the foam, introducing the fibrous suspension into the foam, transferring contaminates from the fibrous suspension to the foam, and removing some portion of the fibrous suspension from the foam as an accepted stock. The device includes a liquid containing area, a mechanism for introducing a gas into the liquid containing area, and a mechanism for introducing the fibrous suspension into a foam containing area arranged to be adjacent the liquid containing area.

Abstract: Process and device for fractioning a suspension containing paper fibers, in which the suspension is separated into at least two fractions by a wire with a scraper. The process includes moving the scraper in a substantially parallel relation to the wire so that the wire is kept clear, and a parallel current is created in the suspension with respect to an inlet side of the wire by a rough surface of the scraper, so that the suspension is dragged along the inlet side of the wire with the scraper with minimal slippage of the suspension. The device includes at least one wire having an inlet side with openings; and a scraper having a closed rough surface provided adjacent the at least one wire; wherein the scraper is movable substantially parallel to the inlet side of the at least one wire, whereby clogging of the openings of said wire is substantially prevented.

Abstract: Process and apparatus for removing fine impurities from a fibrous suspension. The process and apparatus each provide for conveying the fibrous suspension to at least one sorting device, separating the fibrous suspension using the at least one sorting device into an accepts portion and a rejects portion, finishing at least some of the accepts portion leaving the at least one sorting device using a finishing device, separating at least some portion of the rejects portion leaving the at least one sorting device using at least one last sorting device into an accepts portion and an rejects portion, separating at least some portion of the accepts portion leaving the at least one last sorting device into an accepts portion and a rejects portion using a flotation device, and finishing at least some portion of the accepts portion leaving the flotation device using the finishing device.

Abstract: Sag (deflection) compensation roll and process for operating sag compensation roll. The sag compensation roll includes a rotatable roll jacket, a non-rotating carrier being located inside the roll jacket, and a hydraulic support element arrangement being located between the carrier and the roll jacket. A bearing ring is located at each end of the roll jacket, the bearing rings are movable relative to the carrier in a press plane, and a bearing arrangement is located between the bearing rings and the roll jacket. The bearing arrangement includes at least three support elements distributed in a circumferential direction. At least one of the at least three support elements is movable with respect to the bearing ring. The process includes supplying the bearing pockets with a constant volume flow of hydraulic fluid, and driving at least one support element into the bearing ring under load up to the fixed position.

Abstract: Vacuum conveyor and process for transporting at least a portion of a material web in a web travel direction. The vacuum conveyor includes a suction box is positioned within a loop having a conveyor run adapted to contact and guide the material web and a return run moving in a direction opposite the conveyor run. The suction box includes a suction opening positioned adjacent the conveyor run to suction the material web onto the conveyor belt and an exhaust opening positioned adjacent the return run. A vacuum source is coupled to the exhaust opening through the return run. The process includes creating a suction air flow through the return run of the conveyor belt and suctioning at least a portion of the material web onto the conveying run.

Abstract: Process and device for continuously winding a plurality of longitudinally cut paper webs at machine speed by using a device that includes support rollers and at least one pair of disks associated with each of the support rollers, such that the at least one pair of disks is arranged concentrically with and rotates independently of, its associated support roller. The at least one pair of disks includes a first winding device having a first cardboard tube disposed thereon and a second winding device having a second cardboard tube disposed thereon, such that each of the support rollers include at least one of the pair of disks, which are concentrically arranged with and which rotate independently of the support rollers.

Abstract: Roll press jacket and process for manufacturing a roll press jacket. The roll press jacket includes a hollow cylindrical sleeve made of an castable elastomeric material containing at least one crystallization component, the sleeve has an interior cylindrical surface and an exterior cylindrical surface. The internal surface and the external surface have different hardness characteristics.

Abstract: Vacuum conveyor and process for transporting at least a portion of a material web in a web travel direction. The vacuum conveyor includes two pulleys, a suction box positioned between the two pulleys, and an endless conveyor belt arranged around the two pulleys to form a loop. The suction box is positioned within the loop and the loop includes a conveyor run adapted to contact and guide the material web and a return run moving in a direction opposite the conveyor run. The suction box includes a suction opening positioned adjacent the conveyor run to suction the material web onto the conveyor belt and an exhaust opening positioned adjacent the return run. A vacuum source is coupled to the exhaust opening through the return run.

Abstract: Press roll, system and method for the treatment of a fibrous material web. The press roll forms at least one nip with a respective mating surface and comprises a non-rotatably mounted carrier, a press sleeve surrounding the carrier, and at least one outer support device disposed between the carrier and the press sleeve, the press sleeve being supported against the carrier at a respective press nip. The press roll additionally comprises a sagging control system to control the sagging of the carrier. The system additionally provides first and second mating rolls that form respective first and second nips with the press roll. A method of treating a material web comprises guiding the web along a felt through the press roll and mating rolls.

Abstract: Process and device for handling a material web. The process includes moving the material web, at least in stretches, along with at least one circulating endless belt in a circulation direction and monitoring the movement of the edge of the at least one circulating endless belt. The process further includes driving repeatedly the circulating endless belt in a direction generally transverse to the circulation direction. The device includes at least one circulating endless belt for moving the material web along, at least in stretches, in a circular direction, and a master control unit for determining the transverse movement of the circulating endless belt. Additionally, the device includes at least one belt travel sensor for monitoring the position of the at least one circulating endless belt and repeatedly moving, in cooperation with the master control unit, the at least one circulating endless belt generally transverse to the circulation direction, and an activation device, for moving the sensor.

Abstract: A web guidance device for a calender and a method of threading a web through a calender. The web guidance device is for a roll stack having several rolls which form a plurality of nips, and includes a movable web guidance device which is fixable in at least one insertion position and arranged on at least one side of the roll stack, wherein the web guidance device guides a beginning of the web through the roll stack. The method is for threading a material web through a calender which has a roll stack having at least a first nip and a second nip, and includes feeding a web beginning through a first nip from one side of the roll stack, engaging the web beginning on the other side of the roll stack with a web guidance device, and guiding the web beginning to a second nip with the web guidance device.

Abstract: Hydrocyclone and process for removing foreign substances from a liquid to be cleaned. The hydrocyclone includes at least one inlet for the liquid to be cleaned, at least one accepted stock outlet for the cleaned liquid, and at least one reject opening for foreign substances removed from the liquid to be cleaned. The at least one reject opening includes at least one stoppage-hazard zone, and a color layer is coupled to an exterior wall of the hydrocyclone. The color layer changes appearance in accordance with different temperatures. The process includes introducing the liquid to be cleaned into a hydrocyclone through at least one inlet, discharging cleaned liquid from the hydrocyclone through at least one accepted stock outlet, and discharging the foreign substances from the hydrocyclone through at least one reject opening.