Abstract: The invention relates to an arrangement arranged to introduce a three-dimensional structure in a paper during production of said paper in a paper making machine (1). The arrangement comprises a heat roll (14) arranged to dry a wet paper web and an extended nip roll (12) arranged to form a transfer nip (TN) with said heat roll (14). The extended nip roll (12) is provided with a flexible jacket (17) arranged around the circumferential area of said extended nip roll (12). An external surface of said flexible jacket (17) is provided with a textured portion (15) and when the wet paper web passes the transfer nip between said extended nip roll (12) and said heat roll (14), said textured portion (15) of the external surface of the flexible jacket (17) will impart a three-dimensional texture to the paper web.

Abstract: The present invention relates to a press device (1) that comprises an extended nip roll (2) and a counter roll (3). The extended nip roll (2) has a flexible jacket (4) and a support body (5) inside the flexible jacket (4). The extended nip (2) roll also has internal means for causing the support body (5) to move or expand radially towards an inner surface (6) of the flexible jacket (4) to form a nip with the counter roll. The rolls (2, 3) have axial ends (7, 8, 10, 11) that are supported in bearing housings (9, 12). One or several actuators (13) such as hydraulic cylinders connects bearing housings (9, 12) to each other and the actuator or actuators (13) are arranged to act on the bearing housings (9, 12) to cause them to move to each other in a closing movement. A mechanical stop (14) which is separate from the rolls (2,3) is arranged to halt the closing movement. The invention also relates to a machine that uses the press device and to a method of operating the press device.

Abstract: Calender (1) for calendering a paper or board web (2), having at least one nip (3), which is formed between a heatable roll (4) and a mating element (5), a device (6) for producing a predetermined pressure in the nip (3), and a web treatment device (7) arranged upstream of the nip (3) and having two contact surfaces (9, 10) forming a treatment nip (8), one of which is a circulating contact surface (9) which is formed by a belt (14) circulating on guide rolls (11, 12, 13), the other contact surface (10) is formed by the circulating surface of the heatable roll (4), and the treatment nip (8) extends along an angle (15) of the wrap of the heatable roll (4), wherein, in order to increase the thermal efficiency of the transfer of heat, the circulating belt (14) uses a resilient surface to press the paper or board web (2) onto the heatable roll (4), and the guide rolls (11, 12, 13) control sectional forces of the circulating belt (14) in the treatment nip (8).

Abstract: The invention relates to an arrangement in connection with the press section of a web-forming machine. The arrangement includes at least one press nip for dewatering the web manufactured on a web-forming machine. The arrangement also includes a smoothing press including a smoothing roll arranged after the press nip. The smoothing press includes smooth heat carrying devices arranged as a loop around at least two guide rolls. The smoothing roll is arranged into contact with the devices between two guide rolls. The smoothing roll and/or at least one of the guide rolls is a steam heated drying cylinder or a steam heated roll modified thereof. The invention also relates to a board or paper produced in such arrangement.

Abstract: The object of the invention is an apparatus and a method for improving the detachment of paper (1) from the cylinder of a paper machine in a drying section implemented with a single wire transfer, which drying section comprises means for heating the paper on the drying cylinder (3) and for transporting it onwards on the wire (2) via a hitch roll (8) to the next drying cylinder such that the paper together with the wire in the section between the cylinders is sucked against the wire by means of low pressure. What is essential to the invention is that in order to improve the detachment of the paper (1) an apparatus is installed on the opposite side of the drying wire (2) at the detachment point (7), which apparatus comprises a nozzle (14), with which an air jet (11) is blown against the direction of travel (15) of the drying wire, and a carrying surface (9) such that the air jet (11) ejects secondary air (17) along with it causing an air flow (18) between the planar carrying surface (9) and the drying wire (2).

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 least in some areas inside the drying zone with steam.

Abstract: Calender (1) for calendering a paper or board web (2), having at least one nip (3), which is formed between a heatable roll (4) and a mating element (5), a device (6) for producing a predetermined pressure in the nip (3), and a web treatment device (7) arranged upstream of the nip (3) and having two contact surfaces (9, 10) forming a treatment nip (8), one of which is a circulating contact surface (9) which is formed by a belt (14) circulating on guide rolls (11, 12, 13), the other contact surface (10) is formed by the circulating surface of the heatable roll (4), and the treatment nip (8) extends along an angle (15) of the wrap of the heatable roll (4), wherein, in order to increase the thermal efficiency of the transfer of heat, the circulating belt (14) uses a resilient surface to press the paper or board web (2) onto the heatable roll (4), and the guide rolls (11, 12, 13) control sectional forces of the circulating belt (14) in the treatment nip (8).

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 paper machine having a forming fabric with a paper side plurality of weft and warp yarns interwoven to form a layer contacting a paper web. A plurality of weft and warp yarns are interwoven to form a machine side layer for the forming fabric. A plurality of warp binder yarns are interlaced with the paper side and machine side yarns to form a multiple layered forming fabric. The weft yarns in the machine side layer are greater in diameter than the warp yarns for maintaining width stability of the fabric. The fabric is characterized by high permeability, high void volume and a high Beran's Fiber Support Index.

Abstract: A system for drying one of a tissue and a hygiene web including a drying apparatus, a permeable structured fabric, a permeable dewatering fabric and a mechanism for applying pressure. The permeable structured fabric carries the web over the drying apparatus. The permeable dewatering fabric contacts the web and is guided over the drying apparatus. The mechanism for applying pressure, applies pressure to the permeable structured fabric, the web, and the permeable dewatering fabric at the drying apparatus.

Abstract: A device for producing a fibrous web and, in particular, a web of tissue including a press zone through which the fibrous web together with an endless permeable structured band and an unstructured permeable supporting band is fed while lying between the structure band and the supporting band, a press nip provided on a drying cylinder through which the fibrous web together with the structured band is fed while lying between the structured band and the drying cylinder, and after which the fibrous web is led from the drying cylinder through a calender.

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: A pressure hood with a pressure hood body to be used in conjunction with especially a heated cylinder in a machine for the production and/or conversion of a fibrous web, especially a paper-, cardboard- or tissue web, and a seal assembly to seal said pressure hood body against the cylinder, provides that the seal assembly can be inserted into or removed from the pressure hood body—particularly when the pressure hood is installed on the cylinder—through a movement in axial direction relative to the pressure hood body.

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: This invention relates to an arrangement for sealing off a fluid-filled, stationary pressurized compartment from an endlessly circulating, impermeable belt of a machine for producing and/or refining a paper, paperboard, tissue or other fibrous web with the help of at least one seal of the pressurized compartment, whose contact pressure toward the belt is variable, wherein the belt is pressed by the pressurized compartment against a co-driven support element and the fibrous web runs alone or jointly with one or more function belts between the belt and the support element. The sealing is improved in this case, while producing as little leakage and wear as possible, in that the contact pressure of the seal is controlled as a factor of the drive power and/or the drive torque channeled into the belt and/or as a factor of the leakage of fluid through the gap between the seal and the belt and/or as a factor of the pressure of the fluid in the pressurized compartment.

Abstract: A dewatering system in a paper machine includes a dewatering fabric and a press. The dewatering fabric includes a woven permeable fabric and a polymeric layer having openings therethrough, the polymeric layer is connected to the permeable fabric. The press applying pressure to a portion of the dewatering fabric.

Abstract: Machine and process for the manufacture of a paper web, in particular, a tissue paper or hygienic paper web. At least one pressing gap or nip is formed between a shoe pressing unit and a Yankee drying cylinder, through which a water absorbent carrier band, a water-impermeable pressing band and the web are passed. The pressing gap length is greater than approximately 80 mm, with the maximum pressing pressure of less than or equal to approximately 2 MPa. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Abstract: A drying section of a machine for the manufacture of a material web, in particular of a paper or of a board web, comprises a smoothing nip which is extended in the web running direction and is formed between two pressing areas lying opposite one another of which at least one is formed by a shoe roll, with at least 70%, and preferably at least 90%, of the outer shoe roll diameter lying above the machine base.

Abstract: Wide nip calender arrangement and process for glazing a paper or cardboard web that includes a back pressure surface, a support shoe arrangement, and a circulating jacket loaded by the support shoe arrangement in a direction of the back pressure surface to form a wide nip. A moistening device is arranged before, relative to a web travel direction, an intake to the wide nip, and a calibration nip is arranged behind, relative to a web travel direction, a discharge from the wide nip. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Abstract: Press device and method of using the same for treating a fibrous material web that includes a shoe press unit that includes a flexible press belt that revolves around a non-rotating carrier, a counter roll that includes a deflection compensation roll with a roll jacket revolving around a second non-rotating carrier, a third roll, a roll nip formed between the counter roll and the third roll, a press nip elongated in a web travel direction and formed between the shoe press unit and the counter roll, at least one first support element where the flexible press belt is supported on the non-rotating carrier by the at least one first support element in the region of the elongated press nip, at least one second support element where the roll jacket is supported on the second non-rotating carrier by the at least one second support element in the region of the elongated press nip.

Abstract: The press device for a paper web, such as a calendar, contains a flexible moving element (1a) forming an endless structure, said element forming the shell (1) of a roll, the press device including further a counter roll. Inside the moving element (1a) there is a shoe element (3) that is arranged to support the shell (1a) against the counter roll to form a nip (N). The width and/or the surface contour of the supporting surface of the shoe element (3) guiding the shell of the roll in the nip contact varies in the machine direction and the shoe element is positionable in the machine direction to adjust the nip width and/or length.

Abstract: Machine and process for the production of a tissue web that includes a drying cylinder and a press shoe arrangement. The press shoe arrangement and the drying cylinder are arranged to form a nip with lateral edge areas. A plurality of contact pressing elements are arranged to exert pressing pressures across the nip, a measuring device is structured and arranged to measure pressing pressures resulting in at least the lateral edge areas, and at least one of a control and regulating device is structured and arranged to locally adjust the pressing pressures in the lateral edge areas by adjusting pressing pressures exerted by contact pressing elements assigned to the lateral edge areas. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Abstract: Press section and process for dewatering a fibrous material web that includes a plurality of rolls arranged to form at least three nips and at least one endlessly circulating dewatering belt associated with each nip. Each at least one endlessly circulating dewatering belt is structured and arranged to guide the fibrous material web through its respective nip and to receive water squeezed out of the fibrous material web in the respective nip. The plurality of rolls include at least one press roll having a smooth surface arranged to contact a surface of the fibrous material web and an endlessly circulating, smooth transfer belt is structured and arranged to contact a surface of the fibrous material web opposite the surface contacting the smooth surface of the at least one press roll and to support the fibrous material web through at least one of the at least three nips.

Abstract: A method for controlling the temperature of a heated roll in a calender is provided. The calender comprises at least one heated roll or thermoroll and at least one backing roll, between which is formed a nip through which the material web is conveyed. To the heated roll is supplied internal thermal power by internal heating means of the roll, and external thermal power by external heating means of the roll. Before changing the heated roll, internal thermal power is minimized within a specific period by control means provided in conjunction with the internal heating means; external thermal power is maximized within a specific period by control means provided in conjunction with the external heating means; and the surface temperature of and/or the thermal power released by the heated roll, which corresponds to the surface temperature and/or thermal power desired for the grade of the material web, is maintained within a specific period.

Abstract: A supercalender for calendering a paper web and a calendering arrangement for producing matte-quality paper web has a multiple-nip calender in which at least one of the calendering nips of the multiple-nip calender is an extended nip (N9) formed between a polymer roll (18) and either a shoe roll (30) or a calendering belt.

Abstract: A former for producing a tissue web and a process of making a tissue web using the former. The former includes a forming element, an inner dewatering belt, and an outer dewatering belt. The inner and outer belts converge to form a stock inlet nip. The inner and outer belts are guided over the forming element and thereafter separating from one another in the area of a separation point. At least one suction element is positioned adjacent the inner belt on a side which is opposite the outer belt. Alternatively, a conditioning device is positioned adjacent the outer belt. The process includes forming the tissue web in the area of the forming element, guiding the inner and outer belts around the forming element, and separating the inner and outer belts in the area of the separation point. Alternatively, the process includes conditioning the outer belt.

Abstract: A method and apparatus for calendering paper or board in the manufacture of coated grades of paper or board. At least one of the surfaces of an uncoated base material web is calendered, at least one layer of coating mix being applied onto said surface, and at least the coated surface of the base web is calendered again. The uncoated surface of the base web is calendered by means of a shoe calender having a nip length of at least 50 mm, and the coated surface of the base web is calendered by means of a calender having a nip length of 50 mm at the most.

Abstract: Machine for the manufacture of fiber material web with shoe pressing unit and drying or tissue cylinder arranged to form at least one press nip. Water absorbent carrier band and water-impermeable pressing band being guided through the at least one press nip, and fiber material web is adapted to pass through the at least one press nip with the water absorbent carrier band and the water-impermeable pressing band. The at least one press nip has a length in web travel direction of less than or equal to approximately 60 mm. Pressure profile results over press nip length having maximum pressing pressure greater than or equal to approximately 3.3 MPa. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Abstract: A method and an arrangement for surface treatment of a paper and/or board web (W) formed of a yankee cylinder (2) and a calendering unit (5) placed one after the other in the machine direction, by means of which the web (W) is first glazed and dried and after that immediately calendered.

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: Machine for the manufacture of a fiber material web that includes a shoe pressing unit, a cylinder including one of a drying and tissue cylinder, in which shoe pressing unit and the cylinder are arranged to form at least one press nip, and a water absorbent carrier band. A water-impermeable pressing band is provided, in which the water absorbent carrier band and the water-impermeable pressing band are guided through the at least one press nip, and the fiber material web is adapted to pass through the at least one press nip with the water absorbent carrier band and the water-impermeable pressing band. The at least one press nip has a length in a web travel direction of less than or equal to approximately 60 mm. A pressure profile which results over the press nip length has a maximum pressing pressure which is greater than or equal to approximately 3.3 Mpa.

Abstract: An air impingement arrangement and method for compensating for the curling tendency of a paper or board web which is being treated. Air impingement is disposed in connection with a paper or board process or with its finishing process and extends across the width of the web (10) running in the vicinity thereof, forming a contact-free web treatment zone, in which process the web is dried in at least one dryer unit (3, 5, 7) that applies single-wire draw. In accordance with the invention, air impingement directed at the web (10) is produced by the air impingement arrangement (20) in the web treatment zone, said air impingement including, one following after the other, at least one hot blowing with air and at least one cold blowing with air. The invention also relates to a paper or board machine provided with this kind of air impingement arrangement.

Abstract: Apparatus for forming an extended nip between a heated mating roll and a shoe roll for treating a product web, especially a paper web, the shoe roll having a stationary support and a flexible belt which can rotate about the support and, in the area of the extended nip, is supported on a shoe which is guided on the support, forms a press section and has an effective shoe width, and the belt having end sections which are fixed to end walls that are rotatably mounted on the support, in each case at the ends and axially adjacent to but at a distance from a mating face located opposite the effective shoe width of the shoe, the mating roll having a radially protruding support ring, which forms an opposing bearing for the direct support of an outer belt section on the mating roll and consists of a thermally insulating material.

Abstract: A method is disclosed for setting the position of the shoe in an extended-nip press, whereby the extended-nip press used in the method comprises a press roll (2) and a backing roll (1), said press roll (1) comprising a rotating endless-loop blanket (3) of a flexible, liquid-impervious material, a rigid and advantageously stationary roll support beam (4) that extends axially through the interior of the endless blanket (3), at least one shoe element (8) resting on the roll support beam (4) and having a concave top face, and a loading element (6) for loading the shoe element (8) by way of pressing the concave top face thereof against the flexible endless-loop blanket (3) so as to make the blanket (3) form a press nip zone (N) in cooperation with the backing roll (1).

Abstract: The invention relates to an assembly for positioning a heater in relation to a roll, wherein the roll (101) has a substantially cylindrical shape with a shall surface (103), rotatable around a shell axis (102), at a first distance (104) from the shell axis (102). The heater (105) comprises at least one heater section (106, 106′, 106″) intended for heating the shell surface (103), and is supported via a suspension attachment (107) by means of a supporting means (108) on a variable, second distance (109) from the shell axis (102). Thereby, the heater section (106, 106′, 106″) is furnished with at least one distance control means (110, 110′) arranged for being in contact with the shell surface (103) during the heating and for automatically regulating the second distance (109) by means of a self-regulating mechanism.

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: The invention relates to a method and arrangement for moistening a substantially dry fiber web and subjecting the moistened web to heat and compression.

Abstract: Device for producing a paper having a three dimensional pattern which has been given the paper web in connection with drying the paper web. The device comprises at least one press nip (12) comprising a rotatable heated roll (13) and a counter means (11, 14), at which either the heated roll (13) along its periphery alternatively a member surrounding the roll or a patterned wire, band or belt is provided with said three dimensional pattern, and wherein the wet paper web (10) is intended to pass through said press nip (12) and is given said pattern. A detaching roll (16) is arranged at a certain distance from the press nip (12) for taking off the paper web from the heated roll (13), and creping means (17) are arranged for creping the paper from said detaching roll (16).

Abstract: A paper processing roll for use in a calender of a paper-making machine which during operation can be exposed to increased temperatures is provided with a heat-treated surface which is produced by hot-grinding or hot-balancing or both.

Abstract: A press for imprinting and drying a fibrous web includes a press device and a roll body, and a heat transferring device that heats the web in the press nip in the form of a sleeve that encircles the roll body and is heated by at least one heating apparatus. The external mantle surface of the sleeve that presses against the web has imprinting elements for imparting a desired imprinted pattern in the web. The sleeve can be substantially rigid such that it is stable in form and does not substantially deform under the loads imposed on it by the press device and roll body. Alternatively, the sleeve can be a flexible and deformable sleeve. The connection between the roll body and the sleeve is such that the sleeve can freely expand and contract axially and radially relative to the roll body as the sleeve is heated by the heating apparatus. The sleeve can be either permeable or impermeable.

Abstract: Method of producing a paper having a three-dimensional pattern of alternating raised and recessed portions, which has been provided in connection with impulse drying, at which the wet paper web (10) is passed through at least one press nip (12) comprising a rotatable roll (13) which is heated and that the paper web during the passage through the press nip is given a three-dimensional pattern of alternating raised and recessed portions either by means of a patterned wire, band or belt and/or by a pattern on the heated roll (13) and where said pattern is pressed into the paper web against a counter means (11, 14). The wet paper web before said press nip is exerted to a creping- or other compacting procedure which foreshortens the length of the paper web. The invention also refers to a paper produced by the method, said paper having a high extensibility.

Abstract: A method and apparatus for drying a fiber web, in which the fiber web is dried between two tight bands moving in the same direction and turning around turning rolls. The first band is heated and the second band is cooled by a cooling chamber. The cooling chamber includes at least one cooling element and the cooling element includes at least one inlet chamber and at least one outlet chamber. The fiber web is arranged to run through a drying zone, with at least one felt or wire, such that the fiber web is in contact with the surface of the first, heated band and the felt or wire is between the fiber web and the second, cooled band. The pressure of the cooling element is balanced by a pressure balancing means, and the second band is provided with a hydraulic bearing for allowing the band to slide evenly and with little friction on the cooling chamber.

Abstract: An endless belt in which a fibrous material is dispersed in a substantially uniform manner all over an endless elastic body layer is provided. A non-woven tape is impregnated with a polyurethane elastomer material liquid and wound and layered on a supporting belt, and then, after curing the polyurethane elastomer material liquid to form an elastic body, it is removed from supporting belt.

Abstract: A press section in a machine for manufacturing a web of fibrous material, comprising a shoe press with extended press nip, the shoe press having a counter roll with a cylindrical press body; a press shoe with a concave surface for cooperation with the press body; an impermeable belt running through the press nip in sliding contact with the press shoe; a clothing running in a loop around guide rolls and through the press nip in contact with the web, and being capable of receiving and carrying liquid along with it; a movable heat transfer means for continuous transfer of heat to the web in the extended press nip; and a heat source for heating the heat transfer means. According to the invention the counter roll comprises a sleeve that forms the heat transfer means and encloses the press body. The invention also relates to a shoe press, a press section with a roll press, and treatment sections with roll and shoe calendars with sleeves of the type described.

Abstract: Dewatering device and process of a machine for at least one of production and processing of a material web, as well as a glazing device an process. The dewatering device includes a circulating flexible continuous belt and an opposite surface. The circulating flexible continuous belt and the opposite surface are arranged to form a nip elongated in a web travel direction, and at least one screen is adapted to guide the material web through the nip. A saddle, which is arranged to support the circulating flexible continuous belt, is segmented in the web travel direction into saddle segments connected to each other. The saddle segments are at least partially separately pressurized. The dewatering process includes guiding the material web through the nip, and at least partially separately pressurizing the saddle segments against the opposite surface.

Abstract: Method to reduce adhesion of a damp fibrous material web, e.g., a paper or material web, to a rotating roll. The method includes producing a steam cushion between the rotating roll and the fibrous material web.

Abstract: Machine and process for producing a fiber material web that includes at least one press device having a shoe press unit and a drying drum, such that the shoe press unit and the drying drum are positioned to form an elongated press nip. The machine also includes at least one belt that is water-permeable and water-absorbent and that is adapted to guide the fiber material web through the press nip, and at least one suction device located ahead of the elongated press nip, relative to a belt travel direction. The at least one belt is guided over the at least one suction device. The process includes guiding the at least one belt over the at least one suction device and suctioning the at least one belt, such that moisture is removed from the at least one belt, and guiding the fiber material web and the suctioned at least one belt through the extended press nip.