Abstract: Apparatus for washing and dewatering pulp comprising rotatable press rolls including permeable outer surfaces and a casing comprising a vat in which the rolls are installed are disclosed. A feed for feeding the pulp through the gap between the vat and the outer surfaces of the press rolls is provided and the vat includes a vat segment providing at least one compartment between the vat segment and the casing, the at least one compartment extending along the longitudinal extension of one of the first and second rotatable press rolls and a pressure device to maintain the pressure in the at least one compartment corresponding to the pressure in the gap.

Abstract: A device is provided for distribution of 2-13% cellulose pulp to a movable processing surface in a pulp processing device to form a pulp web thereon. An inlet box has an inlet and an outlet defined therein. A rotatable distribution means is arranged for distributing pulp along an entire length of the outlet. The distribution means is placed so that a first distance (a1) between the distribution means and a first outlet wall is greater than a second distance (a2) between the distribution means and a movable processing surface.

Abstract: A forming section has a lower wire loop (11), which constitutes a single-wire section (T) following a breast roll (12). A first dewatering zone (Z1) has at least one stationary, first forming shoe (40) followed by a pulsating strip cover (50). The first forming shoe has leading and trailing edges and underpressure affecting through holes of the cover. The holes are openings or slots substantially in the longitudinal direction of the machine, whereby non-pulsating dewatering is applied on the stock travelling on top of the lower wire. A pulp suspension jet is fed from a headbox (30) at an impact point after the shoe leading edge. The cover is straight at least in the area between the impact point of the pulp suspension jet and the trailing edge. The impact of the pulp suspension jet on the forming wire is thus better controlled in a better way, increasing production speed.

Abstract: This invention relates to a rail for the compliant supporting of a mesh in the region of a double mesh zone of a double mesh section of a machine for producing a fibrous web, including a movable head rail, a movable bearer rail, a fixed guide rail, a compliant pressing apparatus, and a compliant return apparatus for moving the movable bearer rail together with the movable head rail from the operating position to the resting position and for holding the two rails in the resting position. The compliant return apparatus has, spread over the length of the movable bearer rail, several movable return hoops which at the one end can be made to engage at least temporarily with the movable bearer rail and at the other end can be loaded at least temporarily by at least one return element respectively arranged between the fixed guide rail and the movable return hoop.

Abstract: This invention relates to a method for producing a fibrous web from at least one fibrous suspension in a twin mesh former with a twin mesh zone which has a wedge-shaped intake nip and is formed at least in some sections by two rotating endless meshes, of which the first mesh, which is passed over a preferably positionable inlet roller, is passed in the double mesh zone over several rails rigidly arranged a distance from each other on a preferably movable dewatering box, and of which the second mesh is passed in the twin mesh zone over several rails which are arranged opposite the rails of the preferably movable dewatering box, are supported by way of compliant elements and are pressed with a selectable force against the second mesh.

Abstract: Methods for dewatering a fiber suspension in a twin-wire press, having a lower wire and an upper wire, and a first and a second dewatering table, which supports the wires such that a dewatering space is defined by the wires, are disclosed. The wires transport the fiber suspension under compression of the wires by the dewatering tables, such that the fiber suspension is dewatered and forms a fiber web between the wires. A separate pressing force is applied against one of the wires, such that this wire presses the formed fiber web via the second wire against one of the dewatering tables and further dewaters the fiber web. The separate pressing force is adjusted such that a desired dryness of the fiber web leaving the dewatering tables is achieved. A twin-wire press is also disclosed.

Abstract: A forming section for a gap blade former type papermaking machine having a headbox which delivers a jet of papermaking stock between a conveying forming fabric and a backing forming fabric is provided. The conveying fabric moves in sliding contact over an impingement shoe on which the jet of papermaking stock is delivered at a point of impingement. A forming shoe located immediately downstream of the impingement shoe over which the backing forming fabric slides. The impingement shoe is mounted for at least one of pivoting and transverse movement so that a position of the point of impingement of the jet of papermaking stock can be adjusted by at least one of rotating the impingement shoe about a first pivot point and transversely shifting the impingement shoe. The forming shoe can also be mounted for movement.

Abstract: The present invention relates to a washing apparatus (2) for washing of cellulose pulp, comprising a rotatable drum (4), a stationary support (6), a discharge device (8) that has an outlet orifice (9), a casing that surround the drum and that forms a longitudinal discharge opening (10) and a conveyer worm (12) arranged below the outlet orifice for reception and removal of washed pulp. The conveyer worm (12) is movably arranged relatively the support (6) between a first position (P1), in which the conveyer worm receives washed pulp during operation, and a second position (P2), in which the outlet orifice (9) is exposed and access to the drum (4) via the outlet orifice is possible for carrying out service, maintenance and inspection of the washing apparatus (2).

Abstract: Dewatering system for dewatering a web. The system comprises a former, a belt press, and a structured fabric comprising a paper web facing side and being guided over a support surface and through the belt press. The structured fabric runs at a speed differential relative to a wire of the former. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.

Abstract: Twin-wire presses are disclosed for dewatering fiber suspensions comprising endless upper and lower wires defining a dewatering space, upper and lower wire guides for guiding the wires obliquely towards the inlet end of the dewatering space, and upper and lower wedge-shaped seals extending from an inlet box towards the dewatering space inlet to create a seal in the tapering space between the wires and the fiber suspension entering the dewatering space. The inner surfaces of the wedge-shaped seals define a passage for the fiber suspension and the outer surfaces extend at an acute angle towards the inner surfaces so that at least part of the seals are sealed against the wires and the distance between the inner surfaces of the seals is substantially equal to the distance between the wires at the dewatering space inlet.

Abstract: A machine for the manufacture of a fiber material web (12), in particular a paper or card web, having a forming zone including at least one circulating endless dewatering belt (16, 18) includes at least one pressing zone (14) combined with a suction system.

Abstract: A twin fabric gap former forming section for paper making machine is described in which: the pitch of the fabric support elements d decreases progressively in the machine direction; the level of vacuum applied to the forming fabrics through the dewatering boxes increases in the machine direction; the two forming fabrics together with the stock sandwiched between them traverse at least four separate and distinct vacuum zones within the forming section as they proceed in the machine direction; the level of vacuum applied to the last of the at least four separate and distinct vacuum zones is higher than the level of vacuum applied to the first of the separate and distinct vacuum zones; the level of vacuum applied to the at least four separate and distinct vacuum zones follows a preselected profile; and the dewatering boxes carrying the fabric support elements are arranged so that the fabric support elements are located in an alternating sequence on the machine sides of both of the forming fabrics.

Abstract: A twin fabric hybrid forming section for paper making machine is described in which: the pitch of the fabric support elements decreases progressively in the machine direction; the level of vacuum applied to the forming fabrics through the dewatering boxes increases in the machine direction; the two forming fabrics together with the stock sandwiched between them traverse at least four separate and distinct vacuum zones within the forming section as they proceed in the machine direction; the level of vacuum applied to the last of the at least four separate and distinct vacuum zones is higher than the level of vacuum applied to the first of the separate and distinct vacuum zones; the level of vacuum applied to the at least four separate and distinct vacuum zones follows a preselected profile; and the dewatering boxes carrying the fabric support elements are arranged so that the fabric support elements are located in an alternating sequence on the machine sides of both of the forming fabrics.

Abstract: A method for dewatering a fiber suspension in a twin-wire press is disclosed including feeding the fiber suspension to an inlet end of an elongated dewatering space, dewatering the fiber suspension during displacement of the endless lower and upper wires which form the elongated dewatering space by flowing filtrate through the endless lower and upper wires, collecting the filtrate in outlet boxes, and adjusting the pressure differential between the elongated dewatering space and each of the upper and lower outlet boxes by controlling the counter-pressure applied to the filtrate flow on both sides of the endless upper and lower wires directly adjacent the inlet end of the dewatering space. A twin-wire press is also disclosed therein.

Abstract: To present a paper machine for a used paper recycling apparatus small enough to be installed in a room of small shop or the like, friendly to the environment, low in running cost, and high in confidentiality. The paper machine includes a paper making process unit for manufacturing wet paper from slurry pulp suspension sent from the pulp making section in preceding process, a drying process unit for drying and regenerating the wet paper manufactured in the paper making process unit, and a calender roll unit for calendering the dry paper dried in the drying process unit, in which the calender roll unit is disposed adjacently to the downstream side position of the drying process unit, and calenders the dry paper discharged from the drying process unit by rolling and pressing from both face and back sides.

Abstract: Fibrous stock is supplied by a paper or board machine headbox (1) between looped forming wires (11, 12). Water is removed in a first dewatering zone (Z1) formed with a fixed forming shoe (3) having a curved surface against which a wire (12) is supported while the opposite wire (11) is unsupported in the area of the shoe (3). Water is removed in a second dewatering zone (Z2) formed by fixed dewatering blades (21) on the other side of the wires (11, 12) and supported against the stock therebetween (21) and on the opposite side of the wires (11, 12) by dewatering blades (24), loaded in a controlled manner against the fixed dewatering blades (21) at gaps (22) between these so that pulsating dewatering is caused in the second zone (Z2). The wires (11, 12) are guided so the shoe (3) causes essentially non-pulsating dewatering in the stock.

Abstract: Twin-wire former for producing a fibrous web. The former includes two endless wire belts arranged to form a twin-wire zone, a dewatering element, and a headbox positioned at an angle relative to an imaginary first horizontal plane. The twin-wire zone includes a first section in which the two wire belts are arranged to run over the dewatering element. The two wire belts are further positioned to form a wedge-like inlet gap that is structured and arranged to receive a fibrous stock suspension directly from the headbox. Additional dewatering elements are utilized. The twin-wire zone includes a second section in which the two wire belts along with the fibrous web formed between the two wire belts are arranged to run downward over the additional dewatering elements. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.

Abstract: A web is formed between two wire loops (13, 14), in a wire section of a paper or board machine, in connection with which dewatering elements (12, 17, 15, 28) are placed and in which water is drained from a stock suspension from between the two wires (13, 14). In the region of a twin-wire zone, a suction roll (15) is placed within one wire loop and a suction box (16) having a curved surface is situated in opposed relationship with the suction roll (15) on the wire loop. After the suction box (16), the web is guided, due to the effect of a vacuum of the suction roll (15), forwards on the surface of the wire loop of the suction roll (15).

Abstract: The method is for distributing cellulose pulp that has a 2-12% consistency. A manifoid housing is in fluid communication with distributor housing. The distributor housing has holes that are distributed along a generatrix of the distribution housing. The cellulose pulp is fed into an inlet of the manifold housing. The feed screw is rotated to convey the cellulose pulp in the transverse direction through the distributor housing. The feed screw sweeps across the holes in the distributor housing to urge the cellulose pulp through the holes. The cellulose pulp is uniformly fed through the holes and then through an inlet to dewatering drums. The cellulose pulp is run between the dewatering drums and a trough to form a pulp web. The pulp web is dewatered in a press nip formed between the dewatering drums. The dewatered pulp web is collected by a feed screw.

Abstract: An apparatus for forming a paper or cardboard web from a fibrous suspension, said apparatus having a twin wire section consisting of a first wire loop formed by a first wire, a second wire loop formed by a second wire and at least one headbox, from which headbox the fibrous suspension can be fed into the space between the wire loops, said first wire loop being provided with a dewatering box placed above the wire and arranged to drain water from the fibrous suspension between the wire loops via the bottom of the dewatering box and through the first wire, said apparatus having two successive dewatering zones provided in the area of the dewatering box, where the direction of web movement in the area of the first dewatering zone is away from the dewatering box and the runs of each wire loop are substantially straight while in the area of the second dewatering zone the direction of web movement is towards the dewatering box and water drainage from the fibrous suspension is arranged to take place substantially in a

Abstract: The invention relates to a method of draining a fiber pulp suspension, where the fiber pulp suspension is applied to a convergent dewatering space arranged between two wires travelling in the same direction. In the dewatering space, water and powdery substance are removed from the fiber pulp suspension through the wires. Pressure pulses are generated in the fiber pulp suspension along the length of the dewatering space with pressure pulse elements that are on opposite sides of the wires relative to the fiber pulp suspension and in contact with or at a distance from the wires. The invention also relates to an apparatus according to the method.

Abstract: The invention relates to an arrangement for controlling the edge of pulp mass in a web former, the web former comprising a space formed by two wires or the like, into which space the pulp mass is fed. The wires or the like are supported on a chamber units, which each time include at least one chamber for receiving the water removed from the pulp mass. In conjunction with the side edge of the said web former are arranged pulp mass edge control means, which include an edge sealing part. The edge sealing part extends, in the lateral direction of the web former, by a distance between the chamber units in such a way that it will prevent the pulp mass edge from passing and/or spreading in the lateral direction of the web former into the area of the said edge of the web former. The invention also relates to a method for controlling the pulp mass edge in a web former.

Abstract: A process and apparatus for removing water from a mechanical pulp, chemical pulp or paper sheet, carried between top and bottom wires running through a dewatering machine having a first dewatering zone. The apparatus includes at least one suction box positioned downstream of the first dewatering zone. The process includes generating an air current in at least one of the wires downstream of the first dewatering zone with the suction box. The air current removes water from the wire and directs it into an inner chamber of the suction box. The invention also refers to a device for implementing the process.

Abstract: A process for producing paper webs having a pattern formed into the web is disclosed. The pattern is formed during formation of the web and is made by varying the basis weight of the web. The paper web is produced by depositing an aqueous suspension of fibers between two forming surfaces. One or both of the forming surfaces include lower permeability areas that create lower basis weight areas in the web. The lower permeability areas are contained in the forming surface according to a particular pattern. For instance, the lower permeability areas can be formed into a drainage roll sleeve contained on a drainage roll which contacts a forming surface. The drainage roll can be a forming roll or a breast roll.

Abstract: The present invention relates to a twin wire former in a machine for the production of a fiber web, especially a paper or cardboard web from at least one fiber stock suspension, including a vertical twin wire segment having two wires running over a peripheral area of a turning element, especially a guide roll whose surface is preferably not equipped with suction and is smooth or substantially smooth; and in that at least one separation element, such as a transfer suction box is provided indirectly or immediately following the guide roll that separates the top wire from the bottom wire on which the fibrous web is supported.

Abstract: A twin-wire belt press is disclosed for dewatering a fiber suspension and forming a continuous web of the fiber suspension. The twin wire belt includes a plurality of upper and lower rolls, a perforated roll and endless upper and lower wire belts. Dewatering tables are used to support the endless upper and lower wire belts and form a wedge-shaped pressure space between the endless upper and lower wire belts for initially pressing and dewatering the fiber suspension and forming a web therebetween. Roll members, including at least two press rolls which form press roll nips with the perforated roll and another roll, press and dewater the web between the endless upper and lower wire belts.

Abstract: A wire section in a machine for the production of a fiber web including at least one twin wire former including a revolving continuous inner wire and a revolving continuous outer wire that converge in the area of a forming roll. After the forming roll, viewed in the direction of web travel, and inside the loop of the inner wire and inside the loop of the outer wire at least one additional strip element is located.

Abstract: The invention relates to a device for detaching a paper web 9 from a wire 4, where the pulp suspension is fed in between a wire 4 and a felt 5 by a headbox 2, the wire 4 and felt 5 are guided together over a forming roll 3, and are separated from one another after the web 9 has formed. It is especially characterised by the separation point 10 of wire 4 and felt 5 being located at a distance from the forming roll 3.

Abstract: A method and machine for the manufacture of a fiber web, in particular of a tissue web or of a hygienic web, in which the fiber web is formed on a soft clothing with fine pores and the clothing is guided over a surface subject to suction and in which the fiber web is transferred from a soft clothing with fine pores directly onto a TAD wire of a TAD drying apparatus. An optimum quality of the respective final product is achieved with an energy effort which is as low as possible, in particular, the energy effort required with vacuum generation in the dewatering of the fiber web is reduced.

Abstract: At the end of the twin wire zone of a paper machine former, a suction box (17) inside the upper wire loop (11) has a curved lid (17?) opposite a roll (18) within the lower wire loop (10). The lid is curved in a run situation so the tension of the upper wire (11) reduces the normal force between the wire (11) and the lid (17?) caused by the underpressure of the suction box. The underpressure keeps the web mainly off from the roll (18) and the lower wire (10) while being adhered to the underside of the upper wire (11) and conforming to the curved shape of the lids. Members (17a, 18?) are provided for making the web follow the lower wire (10) in a break situation for conducting it to the broke handling system.

Abstract: A tissue sheet is made using a modified wet pressed tissue machine employing an integrally sealed air press. The apparatus includes: a forming roll; a drying cylinder positioned downstream of the forming roll; an air press positioned between the forming roll and the drying cylinder; a molding fabric adjacent a first fabric such that both fabrics travel through the air press, and wherein the air press is installed to direct a pressurized fluid through the molding fabric first and then through the first fabric; and a pressure roll adjacent the drying cylinder for pressing the molding fabric against the drying cylinder.

Abstract: A paper former comprises two wires which converge for defining a paper production gap and a plurality of dewatering blades arranged in the paper production gap in a paper producing direction and brought into sliding contact with one of the two wires so that a stock is dehydrated while being conveyed in a state put in the paper production gap. Each of the plurality of dewatering blades is shaped into a convexly curved surface configuration bent along a traveling direction of the wires and equipped with a wire sliding contact surface brought into sliding contact with said wire for guiding the traveling of said wire, and grooves are made in said wire sliding contact surfaces as a moisture run-off opening for running off moisture developing through the dewatering from the wire side. This paper former thus constructed can suppress the occurrence of paper defects stemming from the landing of a material jet or paper defects stemming from the dewatering property, thus improving the paper quality.

Abstract: The invention relates to a twin wire former (1) for producing a fibrous web (4), in particular a paper, cardboard or tissue web, from a fibrous suspension according to the generic terms of claim 1. The twin wire former (1) is characterized in that, the two wire belts (2, 3) run upwards after a passing a first deviation device (10), forming an angle (?) relative to an imaginary second horizontal plane (H2), in such a way that the upper vertex (15.SO) of the second deviation device (15) lies above the lower vertex (10.SU) of the first deviation device (10), and that the angle (?) relative to the imaginary first plane (H1) runs downwards.

Abstract: In a paper or board machine, the cross-direction profile of a flow channel defined between a first dewatering element (52, 53) situated inside a first forming wire loop (50) and a second dewatering element (64, 65) situated inside a second forming wire loop (60) is measured, and the location and/or the position of the blade element (64, 65) is adjusted based on the measurement result in order to regulate the thickness profile of a stock flow. The measurement can be by passing an alternating current of low frequency to a current rail situated in the second dewatering element (64, 65) and by measuring the strength of the magnetic field created by it by at least two measuring devices which have been placed either in the first dewatering element (53) or, when the first dewatering element is a forming roll (52), in the same dewatering element (64) as the current rail.

Abstract: A machine for producing a tissue web is provided, including a former having a forming region which includes at least one circulating, continuous dewatering wire having zonally variable wire permeability. Furthermore, a process for producing the tissue web in a tissue machine is provided. The process includes forming the tissue web in a forming region of a former, wherein the forming region includes at least one circulating, continuous dewatering wire having zonally variable wire permeability.

Abstract: Highly textured tissue sheets, particularly suitable for use as bath tissue, are produced by throughdrying and have a low number and/or low amount of pinholes. The low number or amount of pinholes is provided by using a throughdrying fabric having parallel wide ridges with a height suited to the particular tissue sheet being produced.

Abstract: A pulp former's sealing blades extend between the headbox slice and twin forming wires and are bonded and/or pinned to blade supports which mount the blades to the slice. The blade supports have flat mounting surfaces which extend in the machine and cross machine directions and which overlie or underlie the blades supports. The blades may be affixed to the supports with an adhesive film. The supports are in turn mounted to the upper and lower sides of a pulp former headbox slice. After the adhesive bond is formed, holes are drilled through the flexible blades and into the blade supports. The holes are filled with pins which are mounted flush to the pulp side surfaces of the flexible blades. The holes through the flexible blades may be tapered, and the corresponding tapered portions of the pins may be used to clamp the flexible blades to the blade supports.

Abstract: Machine and process for producing a fibrous material web. The machine includes at least one shoe press having at least one drying cylinder and a shoe press unit which are arranged to form a pressing nip elongated in a web travel direction. At least one suctioned apparatus is arranged before the at least one shoe press relative to the web travel direction, and a water-permeable continuous carrying belt is arranged to guide the fibrous material web over the at least one suctioned apparatus and through the elongated pressing nip. A hood subjected to an overpressure is assigned to the suctioned apparatus and is arranged to support an underpressure effect of the at least one suctioned apparatus. The process includes guiding the fibrous material web and the carrying belt through the elongated pressing nip, and supporting an underpressure effect of the suctioned apparatus by creating an overpressure in the hood.

Abstract: The invention relates to a twin wire former for the production of a fiber web specifically a paper, cardboard or tissue web, from a fiber suspension. The invention is characterized in that the rotating forming roll has an open volume and is a non-suction type; the rotating forming roll has a forming roll diameter of less than 1,400 mm; the rotating forming roll has a forming roll angle of wrap of less than 70°; a forming suction box is located immediately downstream from the rotating forming roll as viewed in direction of wire travel; and in the area of the wedge-shaped inlet nip, the fiber stock suspension has a stock density of between 0.4% and 2.0%, preferably between 0.6% and 1.5%. These characteristics result in an improved forming quality and web quality.

Abstract: The invention relates to an arrangement for controlling the edge of pulp mass in a web former, the web former comprising a space formed by two wires or the like, into which space the pulp mass is fed. The wires or the like are supported on a chamber units, which each time include at least one chamber for receiving the water removed from the pulp mass. In conjunction with the side edge of the said web former are arranged pulp mass edge control means, which include an edge sealing part. The edge sealing part extends, in the lateral direction of the web former, by a distance between the chamber units in such a way that it will prevent the pulp mass edge from passing and/or spreading in the lateral direction of the web former into the area of the said edge of the web former. The invention also relates to a method for controlling the pulp mass edge in a web former.

Abstract: The invention relates to a device for detaching a paper web 9 from a wire 4, where the pulp suspension is fed in between a wire 4 and a felt 5 by a headbox 2, the wire 4 and felt 5 are guided together over a forming roll 3, and are separated from one another after the web 9 has formed. It is especially characterised by the separation point 10 of wire 4 and felt 5 being located at a distance from the forming roll 3.

Abstract: The invention relates to a twin wire former (1) for producing a fibrous web (4), in particular a paper, cardboard or tissue web, from a fibrous suspension according to the generic terms claim 1. The twin wire former (1) is characterized in that, the two wire belts (2, 3) run upwards after a passing a first deviation device (10), forming an angle (&bgr;) relative to an imaginary second horizontal plane (H2), in such a way that the upper vertex (15.SO) of the second deviation device (15) lies above the lower vertex (10.SU) of the first deviation device (10), and that the angle (&dgr;) relative to the imaginary first horizontal plane (H1) runs downwards.

Abstract: A paper forming device of a paper machine enables a change-over between a thin paper high velocity forming and a thick paper forming. In the paper forming device, stock liquor S is discharged from a headbox 1 onto a wire 2 and, while being transferred on the wire 2, is dewatered by a dewatering equipment and further by a suction box 6. A forming roll 13, wound with an extended felt 7, is arranged movably up and down above the wire 2 near the headbox 1. When a thin paper is to be formed, the forming roll 13 is moved down so that a nip of the stock liquor is formed between the wire 2 and the felt 7. Thereby, the stock liquor S discharged from the headbox 1, can be comparatively immediately nipped between the wire 2 and the felt 7.

Abstract: The present invention relates to a twin wire former in a machine for the production of a fiber web, especially a paper or cardboard web from at least one fiber stock suspension, including a vertical twin wire segment having two wires running over a peripheral area of a turning element, especially a guide roll whose surface is preferably not equipped with suction and is smooth or substantially smooth; and in that at least one separation element, such as a transfer suction box is provided indirectly or immediately following the guide roll that separates the top wire from the bottom wire on which the fibrous web is supported.

Abstract: A twin-wire former in a paper machine has two forming wire loops (10, 20), which define between themselves a twin-wire zone. At least one dewatering box (30) is located inside one of the wire loops (10, 20) to remove water through the wire from a web (W) being formed. At least one loading blade (40) is located opposite the dewatering box (30) inside the other wire loop (20; 10) in contact with the other wire. The dewatering box (30) includes at least three successive dewatering zones (30a, 30b) in which every second zone (30a) has a vacuum (p) and every second zone (30b) is vacuum-free. The at least one loading blade (40) is placed inside one of the wire loops (20; 10) at a location where it is opposed by a respective vacuum-free zone (30b), which is preceded and followed by a vacuum zone (30a).

Abstract: A device for dewatering a pulp web having a dewatering section comprising top and bottom wires forming a wedge-shaped dewatering zone which can be adjusted and/or pressure-loaded at the downstream end, and with a pair of press rolls mounted at the end of the bottom wire. The top roll of the pair of press rolls is a shoe press roll.

Abstract: An apparatus for forming a paper or cardboard web from a fibrous suspension, said apparatus having a double wire section consisting of a first wire loop formed by a first wire (v1), a second wire loop formed by a second wire (v2) and at least one headbox, from which headbox the fibrous suspension can be fed into the space between the wire loops, said first wire loop being provided with a dewatering box placed above the wire and arranged to drain water from the fibrous suspension between the wire loops via the bottom of the dewatering box and through the first wire, said apparatus having two successive dewatering zones (L0, L1-Li) provided in the area of the dewatering box, where the direction of web movement in the area of the first dewatering zone is away from the dewatering box and the runs of each wire loop are substantially straight while in the area of the second dewatering zone the direction of web movement is towards the dewatering box and water drainage from the fibrous suspension is arranged to take

Abstract: A wire section in a machine for the production of a fiber web including at least one twin wire former including a revolving continuous inner wire and a revolving continuous outer wire that converge in the area of a forming roll. After the forming roll, viewed in the direction of web travel, and inside the loop of the inner wire and inside the loop of the outer wire at least one additional strip element is located.

Abstract: A process for producing paper webs having a pattern formed into the web is disclosed. The pattern is formed during formation of the web and is made by varying the basis weight of the web. The paper web is produced by depositing an aqueous suspension of fibers between two forming surfaces. One or both of the forming surfaces include lower permeability areas that create lower basis weight areas in the web. The lower permeability areas are contained in the forming surface according to a particular pattern. For instance, the lower permeability areas can be formed into a drainage roll sleeve contained on a drainage roll which contacts a forming surface. The drainage roll can be a forming roll or a breast roll.

Abstract: A tissue paper making machine, a tissue paper product, and a method for producing such a tissue paper product. According to the invention, a dewatering and sheet-forming wire (13;14) is deposited in the pulp flow area by a texturing wire (16;17) that is provided with a texture comprised of closed wire zones. This results in the production of a tissue paper product having improved optical and haptic properties.