Abstract: Increasingly higher requirements are imposed on the quality and the speed of the production process during the manufacture of nonwovens. It is therefore an object of the invention to provide a process belt for improved nonwoven manufacture. This object is achieved with a process belt for nonwoven or paper manufacture which comprises a device for electrical charging of the process belt. Such a device makes it possible to influence the deposition of nonwoven material on the belt and also to optimally configure the contact between belt and nonwoven material during nonwoven manufacture. In particular, during the transfer of nonwoven material from one belt to another or another installation part, the electrostatic charge assists by repulsion and attraction reactions between nonwoven material and belt.

Abstract: A paper machine includes a dryer and a reel; at least one blow box located between the dryer and the reel; and a blower supplying a source of dry air to the at least one blow box.

Abstract: A dryer fabric for a condensation drying apparatus in a machine which produces and/or processes a web material, such as paper, cardboard or tissue, includes a base structure which essentially provides the dimensional stability of the fabric and which consists of polyester and/or PCTA and/or PCT and/or PEEK and/or PPS and/or thread material which includes PA with high temperature stability; a fibrous nonwoven layer located on the basic structure, which essentially provides the water absorption capacity of the fabric and which provides the dryer fabric with a web material contact side on its outside, facing away from the basic structure, whereby the fibrous nonwovens layer comprises a first polymer material located at least in the area of the outside and whereby the fibrous nonwovens layer is compressed and smoothed in the area of the outside which provides the web material contact side through means of hot-calendering above the melting temperature of the first polymer material.

Abstract: Described herein is a new concept in air dried tissue (ADT). The wet tissue web is received from the wet end of a papermaking machine and dried by an air floatation dryer that uses an endless loop to transport and support the wet tissue web as it is dried.

Abstract: This invention relates to a device for transferring a material web, particularly a web made of paper, board, tissue, or other pulp. In order to transfer the material web and, preferably, a supporting belt from a first supporting surface to a subsequent supporting surface, a pick-up box with a pick-up zone to lift the material web off the first supporting surface and a stabilizer box with a stabilizing zone to stabilize the material web are arranged before the subsequent supporting surface. Suction can be applied to the pick-up zone and the stabilizing zone by means of a vacuum source. A further zone to separate the vacuum in the pick-up zone from the vacuum in the stabilizing zone is located between the pick-up zone and the stabilizing zone. This invention also relates to a process for transferring a material web performed with the device according to the invention.

Abstract: A device for transferring a material web, particularly a web made of paper, board, tissue, or other pulp. In order to transfer the material web and, preferably, a supporting belt from a first supporting surface to a subsequent supporting surface, a pick-up zone to lift the material web off the first supporting surface and a stabilizing zone to stabilize the material web are arranged before the subsequent supporting surface, where vacuum can be applied to the pick-up zone and the stabilizing zone from one vacuum source each. Here, the pick-up zone is sub-divided into at least two pick-up sub-zones across the material web running direction, where the vacuum can be switched on separately in at least one pick-up sub-zone. This invention also relates to a process for transferring a material web performed with the device according to the invention.

Abstract: A device for transferring a material web includes a transfer zone to which vacuum can be applied and at least one sealing mechanism with sealing lips. The sealing mechanism limits or divides the transfer zone, where suction can be applied to a space between the sealing lips.

Abstract: The invention relates to an apparatus used in the formation of paper. More specifically the present invention is directed to an apparatus for maintaining the hydrodynamic processes involved in the formation of a fiber mat or paper sheet. The performance of this apparatus is not affected by the velocity of the paper machine, the basis weight of the paper sheet and or the thickness of the mat being formed.

Abstract: A steam shower is provided for supplying steam to a web in a paper machine. The steam shower includes a diffuser assembly mounted to the cross-beam for movement in the direction of the longitudinal axis of the cross beam. The cross-beam defines an interior steam header for connection to a source of steam. The diffuser assembly includes a plurality of separated steam compartments. The diffuser assembly may be part of a steam provision assembly that is also mounted to the cross-beam for movement in the direction of the longitudinal axis of the cross beam. In addition to the diffuser assembly, the steam provision assembly includes a second steam header and steam valve modules.

Abstract: An air stabilization system employing two parallel, opposite-facing Coanda nozzles, with each nozzle exhausting gas at opposite directions, subjects a moving flexible web to opposing forces effective to create local tension within the web. Each nozzle includes an elongated slot that is perpendicular to the path of the moving web. The nozzles serve as separate points along the machine direction for controlling the height of the web. The operative surface with the nozzles can exhibit a flush surface. The nozzles can be formed on elevated structures on the operative surface. The operative surface can be covered with a transparent substrate to minimize shape distortions on the moving web and to prevent debris from collecting around the sensor. By modulating the velocities of gases exiting the nozzles, the shape of the web can be manipulated to present a planar contour. The air stabilization system can be incorporated into a caliper scanner.

Abstract: A method for drying a fibrous web, particularly a paper, cardboard or tissue web whereby the moving fibrous web is treated with got air in the area of a pre-definable drying zone the fibrous web is treated, at leas in some areas inside the drying zone with steam.

Abstract: The invention relates to a fabric belt for a machine for the production of web material, particularly paper or cardboard, including a first fabric layer providing a web material contact side and formed by way of the interweaving of warps with wefts, and a second fabric layer positioned below the first fabric layer and formed by way of the interweaving of warps with wefts, wherein the ratio of the number of warps of the first fabric layer to the number of warps of the second fabric layer is greater than 1.

Abstract: A method and apparatus of manufacturing a web which is striped with add-on material, comprising: a first slurry supply which forms a sheet of base web and moves the sheet along a first path; a second slurry supply; and a moving orifice applicator operative so as to repetitively discharge the second slurry upon the moving sheet of base web. The moving orifice applicator includes a chamber box arranged to establish a reservoir of the second slurry across the first path, an endless belt having orifice groups, the endless belt received through the chamber box, and a drive arrangement operative upon the endless belt to continuously move the orifices along an endless-path and repetitively through the chamber box. The orifices communicate with the reservoir to discharge the second slurry as bands of add-on material to the base web. Orifices within the orifice groups can be spaced relative to one another to define bands of add-on material having a relative minimum in thickness or to define spaced apart bands.

Abstract: Raw rolls and/or sheets of flat sheet stock are charted by a processing system that generates charting patterns using constraint logic programming, that matches the charting patterns and available raw rolls and/or sheets of flat sheet stock, and that selects the optimal patterns from those matching charting patterns and available raw rolls and/or sheets using mixed integer linear programming.

Abstract: An air stabilization system employing two substantially parallel, codirectional Coanda nozzles, that are positioned adjacent a flexible moving web, with each nozzle exhausting gas at the same downstream machine direction, subjects the moving web to shear forces effective to stabilize the web. Each nozzle includes an elongated slot that is substantially perpendicular to the path of the moving web and a backstep located downstream of the direction of airflow extending from the Coanda slot. The two Coanda nozzles serve as separate points along the machine direction for controlling the height of the moving web. By modulating the velocities or other parameters of gases exiting the Coanda nozzles, the shape of the moving web between the nozzles can be manipulated to present a planar contour for measurements. The air stabilization system can be incorporated into a scanner head to measure the caliper of paper, plastic, and other flexible web products.

Abstract: An air stabilization system employing two parallel, opposite facing Coanda nozzles, that are positioned adjacent a flexible moving web, with each nozzle exhausting gas at opposite directions, subjects the moving web to opposing forces effective to stabilize the web. Each nozzle includes an elongated slot that is parallel to the path of the moving web. The two Coanda nozzles serve as separate points along the machine direction for controlling the height of the moving web. By modulating the flow, pressure and other parameters of gases exiting the Coanda nozzles, the shape of the moving web between the nozzles can be manipulated to present a planar contour for measurements. The air stabilization system can be incorporated into a scanner head to measure the caliper of paper, plastic, and other flexible web products.

Abstract: The invention relates to a method and device for guiding a paper web, or corresponding web-like moving track, by using jets of compressed air as an aid. There are two jet directions, one essentially facing the arrival direction of the web (1) and the other essentially facing the departure direction of the web (1), in which case the jets form an area of vacuum between them. Compressed air is fed from one or more inlet ducts (3, 6).

Abstract: An apparatus and method for manufacturing a multi-layer web product. A long fiber stream is directed around a rotating carding cylinder. Two combing cylinders are disposed adjacent the carding cylinder to comb a first web of long fiber and a second web of long fiber, respectively, from the carding cylinder. A first conveyor receives the first web from the first combing cylinder and transports the first web toward a layering point. Similarly, a second conveyor receives the second web from the second combing cylinder and transports the second web toward the layering point. A short fiber deposition unit is disposed adjacent the second conveyor and deposits short fibers onto the second web. At the layering point, the first conveyor deposits the first web onto the second web, with the short fibers sandwiched therebetween, to form a layered web product.

Abstract: A device for feeding web material through a processing installation comprises a conveyor belt which has a first segment and a second segment. An opening roller and a guiding surface are adapted for unfolding the conveyor belt by means of separating the first and second segments. A spreader roll is adapted to keep the conveyor belt unfolded while a tail of said web material is placed on said first segment. A folding roll is adapted for folding said second segment over said first segment for to enclose the tail in the conveyor belt. The spreader roll comprises a first roll portion, a second roll portion and a circumferential guiding track separating the roll portions. The first roll portion, which is adapted for supporting said first segment, has a cylindrical outer surface.

Abstract: A clothing for supporting a wet paper web for dewatering is provided, comprising a dewatering fabric extending in a machine direction and formed only from a woven material to have a single, substantially consistent, permeability. A pair of laterally-spaced strip portions extend along the dewatering fabric in the machine direction, with each being substantially and consistently impermeable to air and forming a substantially and consistently smooth non-water-retaining surface. The strip portions define a permeable web-carrying portion of the dewatering fabric therebetween, wherein the paper web carried thereby extends over the entire width thereof. The permeable web-carrying portion allows air to flow therethrough, exclusively of the impermeable strip portions, such that the wet paper web carried only by the permeable web-carrying portion is dewatered. The width of the permeable web-carrying portion thereby defines the width of the wet paper web dried thereon. Associated systems and methods are also provided.

Abstract: An apparatus for handling a moving material web includes: a treatment unit including a rotating conveyor belt which forms a closed loop and carries the material web; a second treatment unit with a second conveyor belt which also forms a closed loop, both treatment units being connected parallel relative to each other; a first switch-over for the transfer of the web from the first to the second conveyor belt; and a second switch-over unit for the transfer of the web from the second to the first conveyor belt.

Abstract: A papermaking apparatus having a machine direction, cross machine direction, and a z-direction. The papermaking apparatus also has a web stabilization device. The web stabilization device has a plurality of surface features that have a feature depth of greater than about 0.02?.

Abstract: The invention relates to a forming screen for use in the forming section of a paper machine, comprising a paper and a machine side as well as longitudinal threads extending in the intended running direction and binding cross threads extending transversely thereto, wherein the longitudinal threads are divided in the ratio of the number of threads of 1:1 in a longitudinal thread layer on the machine side and a longitudinal thread layer on the paper side, and the binding cross threads bind in both longitudinal thread layers, which is characterized in that the forming screen has a fiber support index (FSI) which is in the range of 230 to 250 and has an air permeability which is in the range of 5700 to 10600 m3/m2/h.

Abstract: A press roll for washing pulp is disclosed, comprising a central drum and mantle section to which at least one perforated roll plate is attached, comprising a plurality of first and second chambers between the central drum and the roll plate. The chambers of each pair are separated from each other, the first chamber includes at least one inlet defining a radial flow path and the second chamber comprising at least one inlet defining a tangential flow path. At one end of the press roll, the first chamber includes a discharge and the second chamber is closed, and at the other end of the press roll, the second chamber includes an outlet and the first chamber is closed.

Abstract: Machine for the production/processing of a material web, in particular a fibrous web, for example of paper or board, which comprises at least one treatment section in which the material web can have a treatment fluid applied to it, the treatment section being connected or able to be connected to a treatment fluid source via at least one line connection, an elastically deformable compensating material arranged in a fluid holding chamber of the treatment fluid source or of the treatment section. Alternatively, a damping device may be connected to the line connection or arranged in the latter and/or delimits such a fluid holding chamber, and/or elastically deformable compensating material which, in at least one section of the line connection, defines or co-defines an effective line cross section.

Abstract: The invention relates to a procedure and an apparatus in dry formation of a fibre layer, in which procedure fibre-containing air is passed through a forming wire (7) moving via a former (2) or an equivalent distributor unit and further through a suction box (8) or equivalent placed below the forming wire, and which air is circulated back to the upper part of the same or another former. In the solution of the invention, the air circulated through the suction box (8) is passed to the upper part of the former via channels (17) with an adjustable flow rate.

Abstract: Rope guide arrangement, deflection device, and method for guiding a leader strip of a material web through a device. The arrangement includes at least two ropes being arranged offset relative to one another in a first plane defined by a machine direction and a transverse machine direction. Further, the at least two ropes are arranged offset relative to one another in a second plane oriented at a non-zero angle from the first plane.

Abstract: Equipment for leading a web threading tail in a paper machine has at least two sequential surfaces (11) in the direction of travel of the web threading tail (10), between which a nozzle (12) is arranged to form a directed air blast and thus to transport the web threading tail (10). The equipment has an element (13) in which an exhaust zone (20) is arranged in the surface (11) before the nozzle (12) in the direction of travel of the web threading tail (10), for leading air away from the element (13) between the web threading tail (10) and the surface (11).

Abstract: To present a paper manufacturing apparatus for 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 manufacturing apparatus includes a paper making process unit for manufacturing wet paper from pulp suspension sent from a pulp making section in preceding process, the paper making process unit includes a paper making conveyor for manufacturing and conveying the pulp suspension, the paper making conveyor is composed of a mesh belt of paper making mesh structure of numerous mesh cells for filtering and dewatering the pulp suspension disposed so as to run straightly toward its running direction, and the paper making process length in the mesh belt is set in a range of straight running direction length of the mesh belt in the apparatus case of furniture size. As a result, a used paper recycling apparatus of small size and simple structure is realized.

Abstract: An apparatus and method for manufacturing a multi-layer web product. A long fiber stream is directed around a rotating carding cylinder. Two combing cylinders are disposed adjacent the carding cylinder to comb a first web of long fiber and a second web of long fiber, respectively, from the carding cylinder. A first conveyor receives the first web from the first combing cylinder and transports the first web toward a layering point. Similarly, a second conveyor receives the second web from the second combing cylinder and transports the second web toward the layering point. A short fiber deposition unit is disposed adjacent the second conveyor and deposits short fibers onto the second web. At the layering point, the first conveyor deposits the first web onto the second web, with the short fibers sandwiched therebetween, to form a layered web product.

Abstract: A device for supporting a wire or felt in a paper production plant or the paper web produced in the plant. The supporting device includes at least one rotatably mounted supporting roll or the like. The at least one supporting roll or the like is mounted in a bearing shell and, on the side facing away from the wire, the felt or the paper web, can have applied to it a medium capable of flowing, specifically a liquid or a gas, by which means it is kept at a distance from the bearing surface.

Abstract: Paper machine for manufacturing a fibre web of paper without through air drying (TAD) or pressing, comprising: a wet end, having a wire section with at least one forming wire, a clothing, being air and water permeable, and a dewatering unit for dewatering the fibre web; and a drying section, comprising a drying surface for the fibre web; and also a transfer roll for transferring the fibre web to the drying section, wherein the fibre web is supported by said clothing from the wire section all the way to and over the transfer roll. The clothing has a three dimensional structure for structuring the fibre web.

Abstract: A swing paper machine configured to manufacture both wet crepe paper web having a moisture content of at least 20% and dry crepe paper web having a moisture content less than about 15%. The paper machine includes a Yankee dryer having a paper web positioned thereon, a creping doctor blade configured to remove the paper web from the Yankee dryer as either the wet crepe paper web or the dry crepe paper web, a first reel, at least one carrier web, and at least one dryer. The wet crepe paper web is carried by the at least one carrier web to the at least one dryer for reducing a moisture content of the wet crepe paper web. The wet crepe paper web bypasses engagement with the first reel. The dry crepe paper web engages the first reel and is wound into a parent roll. The paper machine is changeable between manufacture of wet and dry crepe paper web without altering a position of the first reel and the at least one carrier web relative to the Yankee dryer.

Abstract: The present invention is a method for maximizing water removal from an absorbent web in a press nip. The present invention uses a pressing unit having a blanket with a void volume and with a pressure profile that maximizes water removal in the press section or on the Yankee dryer of a paper machine. The pressure profile of the pressing unit according to the present invention has a very steep pressure drop at and/or following the exit of a pressure distribution curve in order to maximize water removal by minimizing rewet of the web. The improved pressure profile according to the present invention results in increased water removal and/or improved line speed. The void volume further increases water removal and/or improves line speed.

Abstract: An apparatus for dewatering a fiber web in a paper machine includes a heated drying surface, a permeable fabric carrying the fiber web, and a condensing region adjacent a portion of the permeable fabric on a side opposite the fiber web. The fiber web is interposed between and contacts each of the heated drying surface and the permeable fabric. The condensation region has: a) a temperature which is less than a temperature of the permeable fabric; and/or b) a pressure which is greater than an ambient pressure.

Abstract: Machine for producing a fibrous material web and process for guiding the web through the machine. The machine includes a wire section, a drying section, arranged downstream of the wire section with regard to a web travel direction, having at least one free web draw, a first and second shoe press separated in the web travel direction, and an upper felt and a lower transfer belt arranged to guide the fibrous material web through the second shoe press. The lower transfer belt is structured and arranged to transfer the fibrous material web to the drying section, and the material web is guided in a closed draw from the wire section to a first free web draw, with regard to the web travel direction, in the drying section. At least one high-performance drying device is positioned before the first free web draw.

Abstract: A water jet cutter for separation of a trim strip from a moving paper, cardboard, tissue or other type of fiber web, in a machine for the production and/or conversion of the fiber web, including at least one nozzle whose water jet is directed onto the fiber web. An advantage of the present invention is to simplify the construction of the device while maintaining at least equal operational reliability, and to enable installation above a pulper in order to eliminate the necessity for removal and extraction systems.

Abstract: A soft crepe paper machine comprises a wet section with a press section having a press defined by first and second press elements forming a press nip through which a press felt runs with a paper web. A suction roll is arranged in the loop of the press felt before the press nip at a distance from the second press element, and the felt with the web thereon runs around the suction roll with a large wrap angle. A drying cylinder forms the second press element. The first press element is either a solid press roll, a suction press roll, or a variable crown press roll.

Abstract: Equipment for fabric guiding in a paper machine has a fabric (10) and rolls (12–18) adapted to support it. In connection with the roll (17) end there is arranged equipment comprising a stand (19) and a nip guard (26). The stand (19) includes a transfer base (20) as well as transfer equipment (22) for moving the transfer base (20). The equipment further comprises an edge detector (23) for the roll (17) arranged on the opposite side of the fabric (10), for which edge detector there is a vertical bracket (25) arranged in the stand (19). The vertical bracket (25) and the nip guard (26) form an integrated sheet-metal construction.

Abstract: The invention relates to a method for conveying and guiding a lead-in strip in a paper machine, in which method a lead-in strip is directed over a run of a conveyor in the paper machine and a longitudinal vacuum effect is produced across the run of the conveyor in the direction of moment of the run of the conveyor.

Abstract: The invention relates to a roll, including a roll tube that is supported exclusively, at least in radial direction, in an axially central area on a continuous roll support, whereby outside of the central area the roll tube is positioned at a distance A from the roll support, thereby permitting a deflection of the roll tube relative to the roll support. The invention is further characterized in that the roll tube is equipped with increased weights on both ends in order to create a deflection component in the respective ends due to the respective effective additional weight.

Abstract: A device for non-contact support of a continuous moving web of material employs an air clamp stabilizer that includes a Coanda slot and a backstep that is located downstream of the direction of the airflow extending from the Coanda slot. This configuration permits a Coanda jet to expand and to create an additional suction force. Vortex formation may also occur which further contributes to the strength of the suction force. As the web passes the stabilizer, an area of the web material rides on an air bearing that is maintained above the stabilizer surface and downstream of the backstep.

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 system for making a paper web has at least one endless wire which is moved over load bearing and guide rolls. A pulp supply apparatus applies pulp to the wire. Suction devices and ceramic scrapers are arranged along the wire. There may also be present devices for the application, controlled by valves, of a coolant, in particular water, to the wire and the scrapers. At least some of the scrapers are constructed with at least one temperature sensor, whose output is connected to a display device or to a control unit.

Abstract: An apparatus for a paper-making installation with at least one wire supports the wire wipes off the water emerging from the paper pulp or paper web on the wire and passing through the wire. The apparatus is formed with a plurality of supporting and wiping elements of ceramic material located at intervals from one another in the direction of movement of the wire. The upper surfaces of the elements come into contact with the wire. A large number of supporting and wiping elements is provided, and they are located in a plurality of rows that extend over the width of the wire. Each row has a plurality of elements.

Abstract: A method of dewatering a fiber web in a paper machine, includes the steps of: dewatering the fiber web in a forming section to a solids content of greater than approximately 10%; displacement pressing the fiber web in an air press assembly to a solids content of greater than approximately 40%; and through air drying the fiber web in at least one air press assembly to a higher solids content.

Abstract: A trim hold down box apparatus is disclosed for assisting in the separation of trim cut from an edge of a sheet by a cutter prior to the sheet being transferred from a forming wire of a forming section to a press section of a paper making machine. The apparatus includes a frame which is adjustably secured to the former and is disposed downstream relative to the cutter. A box cradle is secured to the frame and a trim box is movably connected to the box cradle such that floating of the trim box with the forming wire is permitted. The arrangement is such that the forming wire is disposed between the trim and the trim box. A biasing arrangement extends between the trim box and the box cradle so that biasing of the trim box relative to the forming wire is permitted. The trim box has a first and a second end and the first end of the trim box is connected to a source of partial vacuum. The second end of the trim box cooperates with the forming wire and is disposed in a vicinity of the trim.

Abstract: A cellulose dewatering machine for producing paper has a sieve dewatering device, a pressing device, a drying device and a subsequent transverse cutter, and the dewatering device has a round sieve cylinder unit.

Abstract: A paper web (w) is passed from the press section (10) to the drying section in a paper machine. The drying section has at least one transfer suction roll (16) for passing the web in a closed draw from the transport belt (12) of the press section to the drying wire (F) of the first cylinder drying group (14). The cylinder drying group has at least one vacuum box (30) stabilising the travel of the web. A high negative pressure is maintained in the transfer suction roll, this pressure being between −35 kPa and −80 kPa in order to attach the web to the drying wire.

Abstract: To accomplish a web transfer, which in reliability is comparable to the one obtained with a closed draw, in any operating environment, but especially where it is desirable to transfer a fast running tissue web (4) from the drying section of a tissue machine, e.g., a Yankee dryer (2), to a reel-up (3), a web support device (10) extends across the width of the web (4) and along a predetermined run of the web support device has a support surface (11) formed by a series of plate member assemblies (23) having means for creating a flow of air in the direction of the web run. Between the web (4) and the support surface (11) the flow of air forms an air layer (15) of reduced static pressure, so as to stabilize the web (4) against flutter. The predetermined run may extend through a calender (7) and past scanner equipment (8). Pneumatic tail threading capabilities may be included.