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: Method and apparatus for determining characteristics of a running material web, the apparatus including at least one measuring device. The at least one measuring device is movable and has at least two degrees of freedom of movement. Each of the at least two degrees of freedom of movement is at least one of a rotary movement and a linear movement. The at least one measuring device is adapted to detect, at a plurality of measurement locations, data relating to at least one measured parameter. The at least one measuring device detects data about at least one of the following measured parameters: measured parameters which relate to a characteristic value of air in a region of the material web; measured parameters which relate to the material web; and other measured parameters. The method includes detecting, at a plurality of measurement locations and using the at least one measuring device, data relating to at least one measured parameter.

Abstract: The invention relates to an arrangement for threading a pulp web (W) from the press section (1) of a pulp machine to the dryer (2) of the pulp machine. The arrangement comprises a closing tail threading belt (3) or the like, which is arranged to convey the narrow tail end (Wh) formed on the pulp web (W) inside the dryer (2), where the tail threading cord travels outside the edge of the normal web line of the pulp web. The tail end (Wh) can subsequently be broadened into a normal-width pulp web (W). The arrangement further comprises means (7) for gripping the tail end (Wh) in order to bring the tail end inside/between a closing tail threading cord (3) or the like, whereby the gripping means (7) are arranged to function at the normal running speed of the pulp machine.

Abstract: A method and equipment for tail threading in a paper machine in which tail threading is carried out in stages:

Abstract: An improved system, apparatus and method is disclosed for transferring a running web from a first carrier fabric to a second carrier fabric in the manufacture of webbed products, such as tissue, paper toweling, and the like. A multi-stage vacuum process applies a vacuum to the running web. One or more auxiliary units apply a vacuum to one or more edge portions of the running web. The apparatus provides for a reliable and efficient transfer of the running web among carrier fabrics, in which the carrier fabrics may include topographical features upon their surface.

Abstract: Device for a drying section useful in the manufacture of paper or paperboard as a fibrous web. The drying section includes a drying drum rotatable about a first axis of rotation and arranged such that the fibrous web runs in contact with a surface of the drying drum, at least about a part of its circumference, and is dried thereby. The device includes at least one press roller rotatable about a second axis of rotation which is essentially parallel with the first axis of rotation, and is arranged, with a line load, to bear against the fibrous web, whereby the drying drum supports the at least one press roller. The at least one press roller is positioned at a corresponding longitudinal edge of the fibrous web, the least one press roller having a first cross-sectional diameter (D) at outer short ends in the device, and a second cross-sectional diameter (d) at inner short ends of the device, the first cross-sectional diameter (D) being larger than the second cross-sectional diameter (d).

Abstract: The invention relates to a method in a paper or board machine, in which method water is removed from a paper or board web (W) by pressing in a press section (30), in which pressing stage the web (W) is pressed in at least one press nip (35; 36), and in which method the web (W) is dried after pressing by impingement drying, in which method the web (W) is passed as a closed draw from the press section (30) to a dryer section (40), and the method applies full-width threading from the press section (30) to the dryer section (40). The web (W) is dried by impingement drying by means of impingement units (46) placed around at least one large-diameter impingement roll (45). In the method, the web (W) is passed after impingement drying as a closed draw through the dryer section (40) to a calender (60), and in the method threading is accomplished as of full width through the dryer section (40).

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 machine for producing a material web is provided having at least one smooth roll at least partially wrapped by the material web. The machine includes an air blowing device arranged for ventilating the material web with at least one discharge stream, wherein the at least one discharge stream is directed into a wedge-shaped opening formed between the at least one at least one roll and the material web leaving the roll.

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 vacuum belt conveyor includes an air-pervious endless belt, a first pulley positioned at the upstream end of the conveyor and a second pulley positioned at the downstream end of the conveyor, the pulleys guiding the belt when the belt is traveling. The endless belt comes into contact with a plate having openings which are connected to a source of negative pressure. The belt, in the area of the upstream end of the conveyor, is in contact with a curved and perforated guiding surface, with the perforations, being connected to a source of negative pressure.

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: 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: An apparatus for transferring a tail of a fibrous web through a press section of a machine for making the fibrous web is disclosed. The apparatus includes a threading device positioned between first and second press section transfer devices that is pivotable between an inoperable position and an operable position. The threading device includes a stationary upper surface defined by a plurality of tubes. The tubes discharge air over the upper surface of the threading device to form an air cushion having an underpressure between the tail of the fibrous web and the threading device. The tail of the web is urged by the air cushion to the second transfer device and is threaded thereinto.

Abstract: In the method for manufacturing surface-treated printing paper, a paper web is first dried down to a target moisture of the surface treatment, and it is wetted again to the target moisture before the surface treatment. The rewetting to the target moisture is conducted on the web running to the surface treatment before a device effecting the surface treatment of the web, as seen in the travel direction of the web. Before re-wetting, the moisture profile of the web is adjusted in the drying section by wetting the web at a point which is located before the area of the heavy shrinkage (cd shrinkage area) in the travel direction of the web.

Abstract: The invention relates to a method and device for reducing the volume or pressure of a fluid which is driven through an opening (3, 17) by moving surfaces. According to said method, the opening (3, 17) is divided in at least two flow channels (5, 6, 14) by means of one or more flexible separation members (4). Each separation member (4) is attached at its rear end relatively to the direction of displacement of said surfaces, and its front finishing end extends inside said opening (3, 17). The inventive method can be advantageously implemented during production and further transformation of strip-shaped materials (paper, cardboard strips, plastic material sheets) for bringing the strip which moves on an element (cylinder, roll, rigid guiding element, winding reel) into close contact with said element.

Abstract: An improved system, apparatus and method is disclosed for transferring a running web from a first carrier fabric to a second carrier fabric in the manufacture of webbed products, such as tissue, paper toweling, and the like. A multi-stage vacuum process applies a vacuum to the running web. One or more auxiliary units apply a vacuum to one or more edge portions of the running web. The apparatus provides for a reliable and efficient transfer of the running web among carrier fabrics, in which the carrier fabrics may include topographical features upon their surface.

Abstract: The invention relates to a device for conveying and guiding a lead-in strip in a paper machine, which device comprises a conveyor belt (20) which is permeable to air and in whose connection devices (15) are fitted by whose means a vacuum effect can be produced on the run (20A) of the conveyor belt (20) on which the lead-in strip is conveyed, by means of which vacuum effect the lead-in strip is made to adhere to and kept in contact with said run (20A) of the conveyor belt (20). On said conveying run (20A) of the conveyor belt (20), on the opposite side of the conveyor belt (20) in relation to the lead-in strip, a foil rib/ribs (15) is/are fitted, by whose means said vacuum effect is produced on the conveying run (20A) of the conveyor belt (20).

Abstract: The ventilator is used to ventilate an offset pocket in the drying section of a papermaking machine. The papermaking machine comprises a row of spaced-apart upper drying rolls and a row of spaced-apart lower drying rolls. It also comprises two rows of spaced-apart felt rolls disposed intermediate the upper drying rolls and the lower drying rolls, respectively, and a paper web intermittently carried by two felts entrained over the upper drying rolls and over the lower drying rolls, respectively. The ventilator comprises a ventral face and a dorsal face. The ventral face comprises at least one ventral orifice disposed adjacent to the felt and the dorsal face comprises at least one dorsal orifice disposed adjacent to a combined draw of felt and paper web.

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 cantilevered frame in a paper machine dryer group of a dryer section supports a drying wire loop to run by at least one impingement drying unit positioned outside the loop. The frame structure (60) supports devices and rolls situated inside the wire loop (13) of the dryer group (R) which guide and support the run of the wire (13) and the web (W). A dryer section may have multiple such dryer groups which overlap one another with closed draws therebetween.

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: Process and apparatus for drying a material web. The process includes guiding the material web to at least one heated area, maintaining the material web in uninterrupted contact with the at least one heated area at least until the material web achieves a firmness sufficient for detaching the material web from the heated area. The apparatus includes at least one heated area arranged to receive the material web. The at least one heated area includes a removal zone arranged for the removal of the material web from the at least one heated area. The at least one heated area has a length is sufficient to achieve a sufficient firmness of the material web to be removed in the removal zone.

Abstract: An apparatus transfers a lead strip of a paper web, in particular the beginning of a still wet lead strip or tail, from a press roll of a paper-making machine to a following section of that machine. An air jet device peels off the beginning of the tail from the press roll and transfers it across a paper roll to an infeed area of a felt which guides the web into the following section. On an infeed area of the felt, an air cushion is created by an air table having a plurality of tiny holes delivering air from a low pressure plenum to the air cushion.

Abstract: In the dryer section of a paper machine, the paper web is pressed against the dryer cylinders by means of an air-permeable endless dryer fabric. A ventilator apparatus extends transversely across the paper machine located outside the pocket above and below the fabric turning rolls. Air from the ventilator is forced into the pocket through the fabric in the nips formed by the fabric and the fabric turning roll. This air dilutes the moisture driven from the sheet by the dryer can. The ventilator apparatus also creates a negative pressure region to exhaust air from the pocket. This exhaust air is used to scour the boundary layer of moisture laden air from the incoming fabric. The two-pass ventilator apparatus has two individual chambers separated by an induction chamber. The primary chamber contains multiple air jet nozzles. The blowing directions of the two longitudinal nozzles may be at different angles with respect to the running direction of the dryer fabric.

Abstract: The invention concerns a method and a device in the dryer section of a paper/board machine. In the dryer section a normal single-wire draw is applied at least partly, in which method the web (W) is passed through the dryer group on support of a drying wire (H). The drying wire (H) presses the web (W) on the drying cylinders (Kn, Kn+1 . . . ) against the heated cylinder faces, and on the reversing cylinders or rolls (Sn, Sn+1 . . . ) between the drying cylinders (10) the web (W) remains at the side of the outside curve. There is one integrated device, through which a support suction and/or blowing is produced in order to improve the runability of the web (W) and to keep the web (W) in contact with the face of the wire, and through which same device, additionally, impingement blowing is produced in order to dry the web (W) and/or to control its tendency of curling.

Abstract: In a method at the end of the drying section of a paper machine, drying cylinders (1, 2) are arranged in two substantially horizontal cylinder rows, wherein the first drying cylinders (1) are placed substantially higher than the second drying cylinders (2). In the method, the web (W) to be dried is conveyed alternately between the cylinder rows of the drying cylinders (1, 2). Further in the method, the transfer of the web (W) between the drying cylinders (1, 2) is supported by a wire run arrangement, and the web is guided after the last drying cylinder (1, 2) of the drying section (A) by a transfer arrangement in between the rolls of a pair of rolls in the calender section (B) of the paper machine.

Abstract: Process and apparatus for transferring a traveling material web into a target region. The process includes positioning at least two cutting mechanisms at one of a same and different width positions between web edges of a traveling material web. The at least two cutting mechanisms are movable relative to the traveling material web in a plane approximately parallel to the material web. The process also includes cutting the traveling material web at the one of the same and different width positions, thereby forming at least one resulting cut that extends approximately parallel to a web travel direction, and forming a substantially pointed beginning of a transfer strip by moving at least one of the at least two cutting mechanisms in a direction toward one of the web edges from its respective width position. In this manner, the resulting cuts of the at least two cutting mechanisms occur at one of a same and a substantially close proximity to a same width position.

Abstract: The ventilator is used to ventilate an offset pocket in the drying section of a papermaking machine. The papermaking machine comprises a row of spaced-apart upper drying rolls and a row of spaced-apart lower drying rolls. It also comprises two rows of spaced-apart felt rolls disposed intermediate the upper drying rolls and the lower drying rolls, respectively, and a paper web intermittently carried by two felts entrained over the upper drying rolls and over the lower drying rolls, respectively. The ventilator comprises a ventral face and a dorsal face. The ventral face comprises at least one ventral orifice disposed adjacent to the felt and the dorsal face comprises at least one dorsal orifice disposed adjacent to a combined draw of felt and paper web.

Abstract: Dryer section and process for drying a fibrous web. Dryer section includes a plurality of dryer groups with at least one heated dryer cylinder and at least one belt to press the fibrous web against a surface of the at least one heated dryer cylinder. Transfer elements, i.e., a delivery transfer element and an accepting transfer element, are arranged to form at least one transfer point. Accepting transfer element has a greater speed than the delivering transfer element, and the transfer elements are arranged not to press against each other at the transfer point and to have a distance from one another of less than about 70 mm. Process includes guiding fibrous web to a first dryer group, pressing, with the at least one belt, fibrous web against surfaces of the at least one heated dryer cylinders of each dryer group, and transferring, without pressing, fibrous web between transfer elements.

Abstract: A method and apparatus effect drying of a paper web using a plurality of heated drying cylinders and at least one air impingement module having a hood. The paper web is brought into operative contact with the heated drying cylinders, and at least one of the final moisture content, quality, and cross-direction profile of the paper web is regulated. The regulation is effected by adjusting the efficiency of air impingement drying of the paper web, by adjusting at least one of the blowing velocity of the medium (typically air) blown against the paper web, the humidity of the blowing medium, and the distance of the hood of the impingement module from the paper web. At least one of the final moisture content of the paper web and its quality may also be regulated by adjusting the steam pressure of one or more drying cylinder groups.

Abstract: A system and method effectively threading the moist tail of a web through a pulp dryer. A tail threading belt in a closed loop passes the tail of the web through the dryer, and the most tail of the web is transferred from a support wire in the press section of a pulp machine to the tail threading belt. Transfer may be effected using a suction roll with a suction sector and a blower sector, or by using a suction chamber having a perforated escort belt which cooperates with it to engage the tail section on the wire and fully support it during transfer to the threading belt. The threading belt may be folded over to contain the tail web inside it while it passes through the dryer.

Abstract: An apparatus for drying, cooling, winding up and transverse cooling of a paper web. A lopping device is provided downstream of a conveyor segment lifting the web over the winder or sheet cutter, whichever is proximal to the cooler, the paper web then reaching a bifurcation from then which it may be directed to engagement with the mandrel in a winding readiness position of the coiler or to a conveyor segment for the transverse cutter.

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 sealing nozzle is positioned in a blow box used in the drying section of a paper machine. The blow box is mounted on that side of the supporting fabric, which is away from the web at the opening gap between the supporting fabric and the cylinder and at a distance “D” from the supporting fabric. A passage is formed between the blow box and the supporting fabric, the passage having a negative pressure region having a border with a region outside the negative pressure region. The sealing nozzle is positioned in a wall of the blow box facing the passage at a distance “d” from the supporting fabric. The sealing nozzle includes: a pivotal sealing member mounted at the border, and a transverse support element, the sealing member pivotal about the transverse support element; and a separate nozzle part having at least one nozzle opening (e. g.

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 sheet stabilizer is provided for a dryer section of a paper-making machine which conveys a wet sheet of paper by way of a felt or fabric, the dryer roller including a leading upper dryer roller, a lower dryer roller, and a trailing upper dryer roller. The sheet stabilizer comprises upper and lower Venturi boxes, which are disposed between the leading upper dryer roller and the lower drying roller. Each Venturi box provides a respective space defined by fixed parallel outer and inner plates. In use, the wet sheet of paper is in sliding contact with the upper outer plate. The upper and lower Venturi boxes cooperate to draw air from the nip between the wet sheet of paper and the lower dryer roller and into both the upper fixed space and the lower fixed space. The sliding contact between the supported wet sheet of paper and the upper outer plate assures that the air flow does not result in fluttering of the wet sheet of paper.

Abstract: A blow box used in the drying section of a papermaking machine and a method for sealing a pocket provided with a blow box, and a blow nozzle. The blow box is arranged to eject air away from the space between a wire and the blow box and/or maintain an underpressure zone in this space. In the interface between the desired underpressure zone and an outside volume, the blow box is provided with a sealing element, such as a blow nozzle, protruding towards the wire to a certain distance “d” seen from the wire, for forming a seal between the underpressure zone and the area remaining outside the underpressure zone. The sealing element is connected to the blow box so that the element may be moved away from the wire to a distance “D” by a push and/or by an actuator, the distance “D” being greater than the distance “d”.

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 method and apparatus achieve a more sustainable lift of a wet or heavy pulp web from a pulp machine to the topmost drying level of a pulp drying, allowing the speed of production to be increased and runnability problems to be minimized. The pulp web is lifted from the last press of the pulp machine to the topmost of the drying levels of the pulp dryer by supporting the web on a support wire. The pulp may be passed through the topmost drying level, and one or two other levels, also supported by a support wire, but in subsequent levels the pulp web is preferably supported only by an air cushion. In each level drying gas is blown toward the pulp web (preferably from both above and below the web) to effect drying, and the web passes around turning rolls between each drying level to enter the next, lower, drying level. The support wire may be of metal or plastic, and has a texture significantly coarser than the texture of wires commonly used in pulp machines.

Abstract: A gas stream directed at a velocity against a cellulosic web in a papermaking machine can act to transfer the web from a transport web moving at a first speed to a transport web moving at a second slower speed. The transport webs apply a linear velocity to each to the cellulosic web on the transport web. The gas stream in the form of an air knife can be directed through the first fabric against the web and can transfer the web from the first fabric to the second fabric. The difference in velocity between the first transport web and the second, increases bulk, introduces a surface finish or otherwise modifies the character of the cellulosic web.

Abstract: A device for transferring a web of paper in the drying section of a paper making machine from one dryer to the next without any open draw. The device is a stationary vacuum bridge that is defined by a pair of walls, and includes rollers on one of the walls for the felt of the drying section to roll thereon.

Abstract: A calender hood for a paper machine having a dryer section and a calender section the hood extending along a portion of the paper path from the dryer section through the calender section to restrict movement of the ambient air into the region between the surface of the paper sheet and the calender hood and thereby reduce heat losses to the ambient air by the paper sheet.

Abstract: Suction roll for the formation or treatment of a material web that includes an outer suction roll jacket comprising a perforated rotating hollow cylinder, a non-perforated support body arranged to extend through the outer suction roll jacket and to support the outer suction roll jacket at at least one point of its axial extent, and sealing ribs arranged to extend radially between the support body and the suction roll jacket and axially over a full length of the suction roll jacket. In this manner, the support body is adapted to rotate at a same speed as the suction roll jacket. The support body can include an axially extending, through-going bore arranged concentrically with the outer suction roll surface. An axially extending, rotationally fixed yoke extends through the through-going bore, and the rotationally fixed yoke has two ends which are supported outside of the support body on a frame. At least one support element is arranged to support the support body on the yoke.

Abstract: An apparatus for drying a wet web of paper comprising at least one through-air dryer, each dryer including a rotatable cylinder having a porous cylindrical deck, at least one continuous drying fabric wrapped about a portion of the circumference of the deck, a plurality of fabric support members positioned relative to each cylinder so as to direct the fabric and the web onto and from each cylinder, and a hood and a plenum cooperating to form a substantially sealed enclosure containing each cylinder. The drying fabric is adapted to support and transport the paper web about a portion of the circumference of the cylinder of each dryer.

Abstract: This invention is directed to a paper-making machine utilizing rotating cylinders, especially dryer cylinders, with a drying felt intertwined about the dryer cylinders to compress the wet paper against the dryer cylinders as the wet paper travels therealong. A threading doctor assembly with a blowpipe air nozzle blowing system is associated with each dryer cylinder. When air is flowing into the blowpipe blowing system, the leading tail of the wet paper is directed from the preceding dryer cylinder to the next. A proximity sensor associated with each threading doctor assembly is in communication with a controller and is positioned to determine if the wet paper is within a detection area. Air valves or solenoids coupled between an air supply system and the blowpipes are also coupled to the controller.

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: Dryer section of a machine for at least one of producing and processing a web of material. The dryer section includes at least one heatable drying cylinder having a circumference, at least a part the circumference adapted to be surrounded by the material web, at least one support band arranged to surround the at least a part of the circumference, and a sealing band arranged to surround the at least a part of the circumference. An overpressure cap is arranged to receive one of a liquid and gaseous medium and is adapted to apply a pressurized one of the liquid and gaseous medium on the at least one drying cylinder. A temperature of the medium is lower than a temperature on an outside of the part of the circumference. At least one second support band is arranged around the at least one drying cylinder and is positioned between the at least one support band and the sealing band, wherein the at least one second support band has a coarser structure than the at least one support band.

Abstract: A continuous drying apparatus for a porous web including a porous web for traveling on a drying line, a heating cylinder for contacting the porous web at its circumferential surface and rotating in synchronization with the travel of the porous web to heat the porous web, a drying band for contacting and supporting a surface of the porous web which is out of contact with the heating cylinder and also for rotating in synchronization with the travel of the porous web, and a pressure rotating body disposed near the circumference of the heating cylinder and outside the drying band. The pressure rotating body is constructed of a rotating member for rotating and contacting an exterior surface of the drying band and a pressure device for pressurizing the rotating member toward the heating cylinder. With this, a porous web can be efficiently dried.

Abstract: Drying section of a machine for producing a material web, such as a paper or cardboard web, comprises at least one drying group having at least one drying cylinder and at least one web guidance device around which the material web is guided in a meandering manner. The shrinkage gradient that occurs in the material web transversely with respect to the direction in which the web travels is set or controlled by providing at least one, and preferably several, areas in which an at least mostly free, unhindered shrinkage of the material web is possible.