Abstract: The invention relates to an arrangement and a method of a paper machine or the like for saving energy in the drying section. According to the invention, in the drying section of a paper machine or the like in connection with a pocket space (9) between two drying cylinders (1, 2) and one turn roll (3), there are the following delimiting said pocket space (9): a first drying cylinder (1), a second drying cylinder (2), a turning suction roll (3) and a wire (5, 5a, 5b), which is arranged to travel from the first drying cylinder (1) to the turning suction roll (3) and from there on to the second drying cylinder (2). The arrangement further comprises a box-like runnability component (10) and a sealing element (19) arranged in the lower part of the runnability component (10), in the gap between the runnability component and the turning suction roll (3) in order to seal said gap and thereby to promote the operation of the turning suction roll (3).

Abstract: System for drying a tissue or hygiene web. The system includes a permeable structured fabric carrying the web over a drying apparatus. A permeable dewatering fabric contacts the web and is guided over the drying apparatus. A mechanism is used to apply pressure to the permeable structured fabric, the web, and the permeable dewatering fabric at the drying apparatus. 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 through-air dryer is disclosed. The through-air dryer includes a cylindrical deck made from a plurality of deck plates that support a throughdrying fabric. The deck plates are supported by opposing hubs. Each of the hubs is in communication with a bearing that is mounted to a stationary shaft for allowing the cylindrical deck and the hubs to rotate. The bearings are positioned so as to create a through-air dryer structure that remains stable during operation and allows for easy calculation of loads on the dryer.

Abstract: An apparatus for treating a fibrous web, in particular a paper, board or tissue web including a press section and a drying section. The press section includes a central roll around which an at least substantially impermeable belt wraps, the fibrous web being removed from this impermeable belt and fed to the drying section. In this case, as viewed in the web running direction, the first drying group of the drying section includes at most three drying cylinders. In the exit region of the first drying cylinder of the first drying group, in which the fibrous web runs off the drying cylinder together with a permeable circulating belt or is removed from the drying cylinder by such a permeable circulating belt, a removal zone to which vacuum is applied is provided on the side of the permeable circulating belt that faces away from the fibrous web.

Abstract: A dewatering fabric for an ATMOS system or a TAD machine that includes a caliper of between approximately 0.1 mm and approximately 15 mm, a permeability value of between approximately 1 cfm and approximately 500 cfm, an overall density of between approximately 0.2 g/cm3 and approximately 1.10 g/cm3, and a weight of between approximately 100 g/m2 and approximately 3000 g/m2. A belt press for a paper machine can utilize the dewatering fabric. 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 permeable belt, a belt press including a roll having an exterior surface and the permeable belt, and a method of drying or pressing a web with the permeable belt. The permeable belt has a paper web facing side and is guided over a support surface. The permeable belt can have a tension of between approximately 20 kN/m and approximately 100 KN/m, a permeability value of between approximately 100 cfm and approximately 1200 cfm, a surface contact area of the paper web side that being between approximately 0.5% and approximately 90% when not under tension, and an open area of between approximately 1.0% and approximately 85%. 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 forming fabric for an ATMOS system or a TAD machine. The forming fabric includes a permeability value of between approximately 100 cfm and approximately 1200 cfm, a paper surface contact area of between approximately 0.5% and approximately 90% when not under pressure and tension, and an open area of between approximately 1.0% and approximately 90%. A belt press for a paper machine can utilize the forming fabric. 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: System for drying a tissue or hygiene web. The system includes a permeable structured fabric carrying the web over a drying apparatus. A permeable dewatering fabric contacts the web and is guided over the drying apparatus. A mechanism is utilized for applying pressure to the permeable structured fabric, the web, and the permeable dewatering fabric at the drying apparatus. 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: The object of the invention is an arrangement for stabilizing a paper web (3) in a paper machine, which arrangement comprises at least three cylinders (4, 5, 6) which have been arranged so that a pocket space is formed between them, a blow box (7) arranged in the pocket space, which blow box has a blow nozzle (12), in which a nozzle slot (19) has been arranged, a separate wall (10), substantially in the direction of the blow box (7), which wall has a first edge and a second edge that are substantially parallel, which has been attached from its first edge to the blow box (7), whose height in the travelling direction of the paper web (3) is 25-300% of the height of the blow box (7) in the travelling direction of the paper web (3), in the second edge of which wall there has been arranged a boundary layer air doctor (15), which extends substantially unto the surface of the cylinder (4, 5, 6), and which wall (10) has been attached to the blow box (7) so that the blow box (7) and the wall (10) form a space in the a

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: An industrial fabric having improved sheet restraint and wear resistance along with acceptable permeability. The improvement is effected by coating only the high spots of the fabric with silicone material. The coating methods used in this invention may include kiss roll coating, gravure roll coating, rotogravure printing, rotary screen coating, screen-printing and/or flexography. The improvement is also applicable to corrugator fabrics.

Abstract: There are known drum jacket constructions that consist solely of perforated sheet metal. There are also known constructions, which, in order to increase the distance between the drum and the surrounding perforated sheet-metal wire gauze, consist of sheet metal with trusses configured e.g. as sheet-metal rings, or of honeycomb sheet-metal strips that are welded together, or of screwed constructions devoid of welding joints. The simplest solution for increasing said distance is a construction comprising a normal screen drum with struts bent into a U-shape that are screwed to the exterior, whereby the wire gauze lies on the external edges of said struts. Said drum however has a low buckling resistance, which is a required characteristic for the drying of tissue or paper. The novel drum jacket construction thus consists of an intersecting structure of sheet-metal strips, whose rings and strips are provided with corresponding insertion slots.

Abstract: A method of manufacturing and a papermaker's or industrial fabric, which includes the application of a polymeric resin material onto preselected discrete locations on a base substrate in a controlled manner in droplets having an average diameter of 10? (10 microns) to point bond yarns, bond spiral wound strips together or to bond layers of a fabric together.

Abstract: A method of manufacturing and a papermaker's or industrial fabric, such as a dryer fabric for the dryer section of a paper machine, includes the application of a polymeric resin material onto preselected locations on the backside of a base substrate using a piezojet array which deposits the polymeric resin material in droplets having an average diameter of 10? (10 microns) or more to build up discrete, discontinuous deposits of the polymeric resin material having a height of about 0.5 mm at the preselected locations. The preselected locations may be the knuckles formed by the interweaving of the yarns making up the fabric. The purpose of the deposits is to separate the backside of the dryer fabric from a surface, such as that of a dryer cylinder or turning roll, to enable air trapped between the dryer fabric and the surface to escape in lengthwise and crosswise directions parallel to the surface, instead of being forced through the fabric, possibly causing “drop off”.

Abstract: This invention relates to porous paper machine clothing (1, 11, 21) for de-watering a paper web in a paper machine, comprising a filament lay-up made of at least one layer (2, 12, 22) of longitudinal filaments (3, 13, 23) and at least one layer (4, 14, 24) of transverse filaments (5, 6, 7; 15; 25) which cross the longitudinal filaments (3, 13, 23), wherein the longitudinal and transverse filaments (3, 13, 23; 5, 6, 7; 15; 25) are single-component filaments, which is characterised in that the longitudinal and transverse filaments (3, 13, 23; 5, 6, 7; 15; 25) are fused at crossing points (8, 16, 27) to each other and/or to parts (17, 18, 19) joining them as a result of heating to the melting temperature which is restricted to said crossing points (8, 16, 27). The invention further relates to a method of producing porous paper machine clothing such as this.

Abstract: A through-air dryer is disclosed. The through-air dryer includes a cylindrical deck made from a plurality of deck plates that support a throughdrying fabric. The deck plates are supported by opposing hubs. Each of the hubs is in communication with the bearing that is mounted to a stationary shaft for allowing the cylindrical deck and the hubs to rotate. The bearings are positioned so as to create a through-air dryer structure that remains stable during operation and allows for easy calculation of loads on the dryer.

Abstract: In order to prevent the formation and subsequent breaking off of large agglomerations of dirt particles on the cover of a paper machine, at least one surface located opposite of the paper web and pertaining to at least one part of the elements forming a contact surface is provided, at least partially, with an average surface roughness of between 5 &mgr;m and 100 &mgr;m. (FIG.

Abstract: A paper machine for stable high-speed papermaking without slackness of wet web, the paper machine including the most downstream press unit along the transfer path of the wet web in the press part, and the most upstream dryer unit and the second upstream dryer unit along the transfer path of the wet web in the dryer part are associated with three different belt mechanisms, respectively, so that the driving units of the three driving units associated with the most downstream press unit and the first and second upstream dryer units are individually controlled so that a transfer speed of the wet web along each of the most downstream press unit and the first and second upstream dryer units is individually set.

Abstract: A web treatment device is disclosed capable of heating and creping a fibrous web with control systems for uniform operation. The web is pressed between two belts in a compression zone, where is it also subject to a temperature gradient that can assist in water removal. Durable coatings on the press belts can assist in maintaining good performance. The system can be used to apply texture to a fibrous web or drive chemical reactions or other physical changes in the web.

Abstract: In a drying section of a machine for producing a material web such as, in particular, a paper or cardboard web, a pick-up suction roll, in particular a larger pick-up suction roll, is provided between the last pressing nip of a pressing section and a subsequent impingement drying unit, which suction roll removes the material web from a pressing felt guided through the pressing nip or from a transfer belt and transfers it to the impingement drying unit.

Abstract: A transversely stretched nonwoven fabric is manufactured by transversely stretching a nonwoven fabric. First, an original web comprising a plurality of un-oriented filaments is heated to a temperature higher than its stretch suitable temperature by 5° C. or more. Next, the heated original web is stretched at a rate of 1.2 to 3 in its transverse direction to stretch the filaments of the original web with almost no molecular orientation involved. Then, the original web stretched transversely at a rate of 1.2 to 3 is heated to the stretch suitable temperature and the original web is further stretched transversely at the stretch suitable temperature. With these steps, a transversely stretched nonwoven fabric in which the original web is stretched transversely at a rate of 7 times or more in total as compared with the state of the stretch thereof is manufactured with a high tensile strength of 132.5 mN/tex (1.5 g/d) in the transverse direction.

Abstract: The blowing device comprises a blow box (30) which is arranged at the opening nip (22) between the wire and the cylinder and which is provided with at least two nozzles (36; 44, 46) or the like arranged close to the wire or the like. The first nozzle (36) is arranged at the opening nip (22) between the wire and the cylinder, for blowing air away from the gap (34) between the wire and the blowing device. The second nozzle (44, 46) is arranged at a distance from said opening nip, in the wire travel direction. The air jets discharged from the nozzles maintain a negative pressure in the space between the blowing device and the wire.

Abstract: The energy efficiency of a throughdrying papermaking process is improved by recycling exhaust air from one or more throughdryers to further heat the web at various places in the process.

Abstract: The energy efficiency of a throughdrying papermaking process is improved by recycling exhaust air from one or more throughdryers to further heat the web at various places in the process.

Abstract: Drying section of a machine for producing a material web. The drying section includes at least one web guidance device and at least one wire arranged to guide the material web through the at least one web guidance device. The at least one web guidance device is structured and arranged to direct pressurized gas at the material web so that, in a web travel direction, the material web is alternately lifted from the at least one wire and resting against the at least one wire.

Abstract: A drying section for drying a web in a papermaking machine has a pre-drying section and a final drying section, wherein the pre-drying section includes a hot press formed by a first press member and a rotatable counter roll in engagement with each other so as to form a nip therebetween through which the web passes. The hot press further includes a heating device disposed in heat-transfer relation to the counter roll and operable to heat a surface region of the counter roll which then passes through the nip so as to heat the web therein, and an imprinting fabric arranged in an endless loop, the imprinting fabric defining an imprinting surface for imprinting the web and being arranged to pass through the nip of the hot press with the web against the imprinting surface such that the web is imprinted. The imprinting fabric continues to support the imprinted web downstream of the hot press at least up to the final drying section.

Abstract: A press assembly for use in a paper-making machine includes a roll, a first air press backing assembly and a second air press backing assembly. The first air press backing assembly and the second air press backing assembly each include an inner wall, an outer support structure and a plurality of inflatable hoses interposed between the inner wall and the outer support structure. The inner wall is positioned adjacent to and defines an air chamber with the roll.

Abstract: A compact multilevel paper making machine is provided comprising a web-receiving region where a web of paper is received on a fabric forming a continuous loop, a reel-up for winding the paper web onto a roll, and a web transfer point disposed between the web-receiving region and the reel-up. The fabric receives the web at the web-receiving region and then supports and transports the web from the web-receiving region to the web transfer point in a first direction on a first defined vertical level. At the web transfer point, the web is separated from the fabric. The fabric loop further includes a return run from the web transfer point to the web-receiving region over which the fabric then travels. A cleaning section is also disposed along the return run of the fabric loop for cleaning the fabric.

Abstract: Drying end of a machine for the production of a material web such as paper or cardboard. The drying end includes at least one impact flow drier configured to bombard at least one surface of the material web with hot air or hot steam impact flow. Also provided is a method for drying a material web including bombarding the material web on at least one surface with hot air or hot steam impact flow, via at least one impact flow drier.

Abstract: A dry end of a machine for manufacturing a material web, in particular a paper or cardboard web, includes at least one convection drier, having at least one drying section. The material web passes through the at least one drying section, and is guided between two air-permeable wire belts.

Abstract: A continuous process for the dewatering of a wide variety of solid-liquid matrices, including primary and secondary sludge, involves the simultaneous application of pressure and heat to solid-liquid matrices.

Abstract: The invention concerns a blow-suction box or equivalent for a paper machine or board machine, which box comprises at least a pressure chamber and which box is placed in the vicinity of a cylinder, roll, or equivalent, from which cylinder, roll or equivalent, a web and/or a wire is/are fitted to run past the box. In connection with the pressure chamber, a nozzle slot has been arranged, out of which a sealing blowing is fitted to be applied towards the cylinder, roll or equivalent and/or towards the web and/or wire running on its face in order to disintegrate the boundary-layer air flow carried along with the web and/or wire. In connection with the nozzle slot, an air guide made of a resilient material has been fitted in order to direct the sealing blowing and to enhance the sealing further.

Abstract: A method and device effect controlled uniform temperature drying of a wet web, such as a paper web substantially immediately after formation in a paper machine, without damaging the supporting fabric carrying the web. The web has a central region and first and second border regions. The wet web to be dried is conveyed on a conventional supporting fabric/wire in a first direction generally parallel to the web border regions, and in a hood drying air is blown against the web from the opposite side thereof as the supporting fabric so that the drying air picks up moisture and becomes moistened air. The moistened air is discharged from the volume adjacent the hood, for example is discharged from at least one hood positioned at and encompassing an impingement surface over which the web and supporting fabric pass. Air supplied for blowing against the web is heated to raise its ability to retain moisture.

Abstract: Apparatus for controlling widthwise contraction of a conveyed web has opposing first web carrier belts and opposing second web carrier belts forming a generally serpentine transport path for supporting opposite lateral edges of the conveyed web.

Abstract: The invention describes a device for through-flow continuous processing of textiles, nonwovens, or paper in web form with a gaseous processing medium circulated in the device. The material rests on the outside of a permeable drum subjected to suction, said drum having bottoms on the ends, namely a sieve-type or perforated covering that rests on the drum structure. For this purpose, sheet metal strips firmly connected with the bottoms extend from one bottom to the other between the bottoms of the drum, with the widths of the strips extending in the radial direction. These sheet metal strips are secured over their entire radially aligned height firmly but releasably to the corresponding bottoms by means of the clamping structure.

Abstract: A screen drum design is known whose drum jacket consists of sheet metal strips running axially and whose width extends in the radial direction. These sheet metal strips must be permanently connected with the endwise bottoms to produce the drum jacket. According to the invention, this connection is made movable. For this purpose, an articulated ring (32) is used that consists of a number of connecting arms (13) mounted pivotably, said arms being connected with articulation at their free ends either with sheet metal strip structure (13, 14) or with bottoms (11, 12) that are located at a distance from the ends of sheet metal strips (13). In this way, movement is always possible between the drum jacket and bottoms (11, 12) to compensate for dimensional changes as a result of temperature fluctuations.

Abstract: A method and device for enhancing the run of a web in a paper machine in which water is removed from the web by pressing the web in at least one press nip and after pressing, the web is dried in at least one dryer group applying impingement drying. The web is guided along a substantially linear path or by using a large curve radius in the dryer group applying impingement drying. In the drying stage, after the impingement drying, the web is dried in at least one dryer group having normal single-wire draw. The web is passed from the pressing stage to the drying stage as a closed draw and more particularly, from the pressing stage to the area with single-wire draw in the drying stage so that the web is constantly supported against at least one support face.

Abstract: Machine for producing a material web, e.g., paper or cardboard, that may include a dryer section with at least one dryer group and the at least one dryer group may have at least one dryer cylinder, a dryer screen, and a metal belt. The machine may also include a cooling device associated with the metal belt. The material web, the dryer screen and the metal belt may be guided in a meandering path around an outside of the at least one dryer cylinder, and the dryer screen may be positioned between the material web and the metal belt. Further, at least one of the metal belt and the dryer screen may be intensely prestressed.

Abstract: Apparatus and method for drying a wet web and modifying the moisture profile of the web. A plurality of gas burners are located within the interior of a through air dryer hood to variably heat air passing through the hood interior before it contacts a wet web on a through air dryer web support. The flowing air within the hood interior is divided into air flow portions directed toward different incremental width portions of the wet web. The burners are separately controlled to vary the heat of the individual flowing air portions to provide a uniform web moisture profile.

Abstract: A method and device for enhancing the run of a web in a paper machine in which water is removed from the web by pressing the web in at least one press nip and after pressing, the web is dried in at least one dryer group applying impingement drying. The web is guided along a substantially linear path or by using a large curve radius in the dryer group applying impingement drying. In the drying stage, after the impingement drying, the web is dried in at least one dryer group having normal single-wire draw. The web is passed from the pressing stage to the drying stage as a closed draw and more particularly, from the pressing stage to the area with single-wire draw in the drying stage so that the web is constantly supported against at least one support face.

Abstract: Device for producing a material web in a dryer part that includes at least one dryer section having a plurality of cylinders including heated cylinders and cooled cylinders. The device may also include a porous dryer screen and a metal belt that may be guided with the material web in a meandering path alternatingly around the heated and cooled cylinders. At least one of the metal belt and the dryer screen being highly prestressed and the device may also include at least one of a heating installation and a cooling installation assigned to act on an area of a circumference of the plurality of cylinders in which the material web may be supported by the dryer screen and the metal belt.

Abstract: A method and device for contact drying a paper web, wherein the paper web is dried initially in a number of successive groups with single-wire draw by pressing the paper web via drying wires of each groups against the heated faces of the drying cylinders and by guiding the paper web on support of the same drying wire from one drying cylinder onto the next drying cylinder over the reversing suction cylinders or rolls in each group with single-wire draw. In the groups with single-wire draw, the paper web is dried to a first dry solids content, after which the paper web is dried directly further by a single group with twin-wire draw to a second dry solids content, after which the paper web is dried further to its final dry solids content by a single normal group with single-wire draw. The limits of the first and second dry solids contents are selected so that, in the middle or in the beginning of the range, the tear strength index and the breaking strength index of the web are at their maximum.

Abstract: Methods and apparatus are disclosed for restrained paper drying in order to produce high performance paper with enhanced stiffness and, in the process, substantially improve paper properties and reduce fiber usage. The paper web is held in a restrained position on a fabric by air suction imposed from beneath the web and is of sufficient application to prevent shrinkage of the web. The web is simultaneously dried by high velocity, high temperature air or superheated steam. For improved finish properties, the wet paper web may be pressed onto a polished heated metal cylinder with restraint being imposed by gluing.

Abstract: A permeable drum for wet or dry treatment of textile material, paper or such permeable materials of a certain width comprises narrow sheet metal strips or narrow webs. The sheet metal strips extend in an axially parallel direction. Connector members between the sheet metal strips are aligned in the peripheral direction. The connector members, also serving as spacers, are of a one-piece design and connect to adjacent sheet metal strips. Secure connection of the spacers to the sheet metal strips is effected by screws. Radially inward beneath the inner edges of the strips is a sheet metal jacket, provided with apertures, having its axis arranged in parallel to a longitudinal axis of the permeable drum. This additional sheet metal jacket causes a certain dynamic pressure of the air flowing through the permeable drum, so that the treatment result is rendered more uniform. Furthermore, the precision of rotation of the permeable drum construction is increased.

Abstract: An apparatus for autoclave continuous decatizing of fabrics, having a rotating cylinder which closes the slot through which a backing cloth and the associated fabric pass to enter and exit the autoclave is provided. A foraminous hollow member, which is adapted to reduce the percentage of oxygen existing within the autoclave (1), is located adjacent to the backing material and the fabric where the backing material and the fabric enter the autoclave. Thin plates (14) are further preferably provided, movable closer to the inside of the fabric (4) immediately before it exits from the autoclave (1), under the external control, in order to be able to possibly continue the "sandwich" pressing action which takes place along the periphery of the foraminous cylinder (2), or to have in this area a free vaporizing stretch.

Abstract: A dryer section apparatus as disclosed for drying a web of paper. The apparatus includes a plurality of dryer groups disposed successively relative to one another, such that the web is progressively dried during movement thereof through the dryer groups. The plurality of groups include a first single-tier group for drying the first side of the web, and a second two-tier group disposed downstream relative to the first group. A second single-tier group is disposed downstream relative to the two-tier group for restraining the web against cross machine directional shrinkage.

Abstract: In a two-wire cylinder dryer, the wire guide rolls are so arranged that the web and wire proceed jointly from the first cylinder to the wire guide roll. An air carrier box is arranged in the shaft contained between two cylinders. The air carrier box has an air channel connecting the area of the leaving point A with an opposite pressure zone. Hot air flows into the air channel through a driver nozzle, so that in the area of the leaving point there is a vacuum zone created which is outwardly bounded by a sealing strip. The pressure zone is bounded by further sealing strips.

Abstract: Blistering of a wet paper web upon a yankee dryer drum is controlled by directing compressed dry air toward the wet paper web in the space between a pressure roll external of the yankee dryer hood and the entry opening between the dryer hood and the yankee dryer drum. The flow of compressed air is controlled so that air flow can be modified across the full width of the wet paper web.

Abstract: Apparatus for drying a wet paper web during manufacture of the paper web. The apparatus allows the moisture profile of the web to be carefully controlled and adjusted. The apparatus includes a rotatable dryer drum and a hood partially encompassing the rotatable dryer drum. A plurality of elongated heater nozzle boxes are disposed in the hood interior and extend across the dryer drum in the cross-machine direction, the elongated heater nozzle boxes being arrayed side-by-side in the machine direction. A plurality of gas burners is located in each of the nozzle box interiors and arranged side-by-side along the length of the nozzle box interiors for producing hot combustion gases within the nozzle box interiors of the heater nozzle boxes.

Abstract: A papermaker's fabric having a system of primary machine direction yarns which form seaming loops at each end of the fabric and a system of secondary machine direction yarns. A system of cross-machine direction yarns are interwoven with the primary and secondary systems of machine direction yarns in a weave pattern that provides adjacent balancing yarns that maintain the seam loops in substantially vertical alignment.