Abstract: The invention relates to a discharge screw arrangement (12) for discharging lignocellulosic material (7) from a lignocellulosic treatment reactor (1) and comprises a discharge screw (10), a feeder pipe (11) and a blow pipe (5), the discharge screw being accommodated in and rotatably arranged inside the feeder pipe and being configured to mechanically transport the lignocellulosic material in a longitudinal direction along a rotational axis of the discharge screw through the feeder pipe towards a downstream end (14) of the feeder pipe, which discharge screw arrangement is configured to allow steam to flow through the feeder pipe to help transporting the lignocellulosic material in the longitudinal direction along through the feeder pipe and out of the feeder pipe through an outlet nozzle (24) arranged in a side wall of the feeder pipe (11) at the downstream end of the feeder pipe and into the blow pipe, wherein the discharge screw arrangement further comprises a material spreader (20), which is rotatably arran

Abstract: Methods of cleaning papermaking fabrics are disclosed. Cleaning compositions for cleaning papermaking fabrics are also disclosed.

Abstract: A below-web dust hood for a papermaking system. The hood body has the general shape of a tapering trapezoidal pyramid, taller at one end than the other. The inlet of the hood body tapers inversely in height—broader where the hood body is shorter, and narrower where the hood body is taller in order to maintain uniform flow across the entire inlet.

Abstract: A dust hood for a papermaking system. The hood body has a roof and depending long sidewalls. An inlet extends substantially the entirety of each of the long sidewalls. The hood includes an outlet at one end. The roof is peaked and reaches a peak line. The hood may be positioned at or near floor level and used with air ramps that drive dust toward the inlets.

Abstract: An upper reel hood in dust control system for the “dry” side of a through-air drying (TAD) papermaking system. The hood body has the general shape of a tapering trapezoidal pyramid, taller at one end than the other. The inlet of the hood body tapers inversely in height—broader where the hood body is shorter, and narrower where the hood body is taller in order to maintain uniform flow across the entire inlet. The hood body may be over 5 meters wide.

Abstract: One aspect of the invention relates to a dust control system for the “dry” side of a through-air drying (TAD) papermaking system. A series of dust hoods are placed in specific locations, both above and below the web of paper or tissue that is being manufactured. Each hood spans at least a substantial portion of the width of the belt or web, and each hood is shaped and otherwise adapted for its particular position, both to accommodate the structure of the papermaking machine and to ensure that the airflow through the inlet of the hood is substantially uniform across its entire width. Baffles are provided between certain hoods in order to create dust-control zones around the hoods, and air ramps and other elements may be used to drive dust into the dust control zones and toward the hoods.

Abstract: Methods of cleaning papermaking fabrics are disclosed. Cleaning compositions for cleaning papermaking fabrics are also disclosed.

Abstract: A sealing strip for a positive or negative pressure zone of a suction or blower roller of a machine for processing and/or producing web material, in particular a paper, cardboard or tissue machine. The sealing strip has a sealing face to be set against and in frictional contact with the inner side of a roller shell for sealing the positive or negative pressure zone during a rotational movement of the roller shell. The sealing strip has a lubricant channel in the form of a cutout from the sealing strip. The lubricant channel is arranged in front of the sealing face. The sealing strip is formed with a first material section at the sealing face and with a second material section at the front wall. The first and second materials are different in at least one physical property, such as modulus of elasticity, abrasion resistance, hardness, brittleness.

Abstract: A system comprising: one or more deckle board that are configured to extend along a machine direction of a paper machine and wherein the deckle board includes a stock side and a non-stock side and the stock side includes a microstructure that generates turbulent flow along a face of the deckle board that breaks up a boundary layer when stock contacts the stock side of the deckle board.

Abstract: A roll cleaning apparatus for a paper making machine has a cleaning member that is mounted to a support member that extends lengthwise relative to a first roll. The cleaning member has a pad and is moveable between an engaged position against the roll during operation, and a disengaged position spaced away from the roll in a non-operating condition. The roll cleaning apparatus includes a drive connected to cause linear reciprocation of the cleaning member and a drive or actuator mounted to move the cleaning member between the engaged and disengaged positions, and operable to bias the cleaning member against the roll in use.

Abstract: In an exemplary embodiment, the disclosed drying and dewatering system comprises an air knife and a vacuum slot, wherein the air knife is positioned over the vacuum slot and fibrous nonwoven material is passed under the air knife and over the vacuum slot. The embodiments of the present disclosure may be used to achieve greater water removal and more uniform binding agent distribution across the nonwoven fibrous material.

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: A roll cleaning apparatus for a paper making machine has a cleaning member that is mounted to a support member that extends lengthwise relative to a first roll. The cleaning member has a pad and is moveable between an engaged position against the roll during operation, and a disengaged position spaced away from the roll in a non-operating condition. The roll cleaning apparatus includes a drive connected to cause linear reciprocation of the cleaning member and a drive or actuator mounted to move the cleaning member between the engaged and disengaged positions, and operable to bias the cleaning member against the roll in use.

Abstract: A cleaning apparatus includes at least one cleaning nozzle that generates and directs a high-pressure liquid jet towards a point of impact on a surface, such as a conveyor belt having a drying screen. A cleaning head has a main opening that faces towards the surface, a discharge opening and a wall with at least one inlet opening defined therein. The at least one cleaning nozzle is disposed outside of the cleaning head and is oriented such that the high-pressure liquid jet passes through the at least one inlet opening before striking the surface. At least one first compressed air supplying device is disposed outside of the cleaning head and is configured to steer liquid from the at least one cleaning nozzle, after it has struck the surface, towards the main opening of the cleaning head.

Abstract: A doctor blade for a fiber web machine (10) includes a blade section (11) and a fastening detent section (12). In the cross-sectional plane, the blade section (11) is asymmetric while the fastening detent section (12) is substantially symmetric so that the doctor blade (10) can be installed in two opposite positions for providing two different functions. The invention also relates to a doctor arrangement in a fiber web machine.

Abstract: The invention relates to a method in a fiber web machine. In the method, a fabric (12) included in the fiber web machine is used for supporting a web (14) produced by the fiber web machine. Moreover, in the method the location of the fabric (12) is changed in the cross direction (CD) of the fiber web machine. The location is changed by means of oscillation, the amplitude (19) of which is kept so high that the area of impact (20) of the web (14) on the fabric (12) is wider than the width (21) of the web (14) throughout the lifetime of the fabric (12). The invention also relates to an arrangement in a fiber web machine, and to a software product.

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: There is described an apparatus (1) for coating a cylinder (C), in particular a wiping cylinder of an intaglio printing press, with a plastic composition comprising inter alia a blade mechanism (4) comprising a single substantially planar blade (40) with a straight edge (40a) extending along the full length of the cylinder to be coated and which is mounted rotatably about an axis parallel to the axis of rotation of the cylinder to be coated. The blade comprises, at its terminal end proximate to the cylinder, an inclined end portion (4a) having an inverted-V shape rising from the upper side of the blade, the top edge of the inclined end portion forming the straight edge of the blade. The blade is adapted to be rotated so that the straight edge of the blade undergoes an upward movement substantially tangential to the periphery of the cylinder in order to discontinue the application of the plastic composition onto the surface of the cylinder.

Abstract: An apparatus for removing particulate-carrying air from a moving web. The moving web has a first side and a second side. The apparatus includes a NACA duct positioned in a non-contacting relationship on a first side of the moving web, and at least partially submerged in a particulate-carrying boundary layer of the moving web. The NACA duct can have an intake opening and an exhaust opening such that when the intake opening is submerged in the boundary layer at least a portion of the particulate-carrying air from the boundary layer enters the intake opening and exits the exhaust opening, thereby scavenging particulate-carrying air from said boundary layer.

Abstract: A roll cleaning apparatus for a paper making machine has a cleaning member that is mounted to a support member that extends lengthwise relative to a first roll. The cleaning member has a pad and is moveable between an engaged position against the roll during operation, and a disengaged position spaced away from the roll in a non-operating condition. The roll cleaning apparatus includes a drive connected to cause linear reciprocation of the cleaning member and a drive or actuator mounted to move the cleaning member between the engaged and disengaged positions, and operable to bias the cleaning member against the roll in use.

Abstract: An apparatus (24) for inserting an endless, flexible clothing (15) in or removing such a clothing from an industrial machine in which the clothing is arranged to run in an endless loop, comprising first and second units (25, 26) between which the clothing is to be fed in an advancement direction (F) essentially transversal to the run direction of the clothing in the machine.

Abstract: A doctor blade for a fiber web machine (10) includes a blade section (11) and a fastening detent section (12). In the cross-sectional plane, the blade section (11) is asymmetric while the fastening detent section (12) is substantially symmetric so that the doctor blade (10) can be installed in two opposite positions for providing two different functions. The invention also relates to a doctor arrangement in a fiber web machine.

Abstract: A planar element for use in a papermaking machine comprising a synthetic construction incorporating nanoparticles in a polymeric resin matrix.

Abstract: A cleaning apparatus is disclosed for processing a moving surface. The cleaning apparatus includes at least one pad that is coupled to a support shoe. The support shoe is attached to a first end of a plate element, and the plate element includes a second end that is adapted to be received by a doctor blade holder.

Abstract: A doctoring system is disclosed for cleaning a moving surface in a papermaking machine, and the doctoring system includes a doctor blade and fluid assist system. The doctor blade is coupled to a doctor blade holder, and the doctor blade holder is coupled to a doctor-back. The fluid assist system is for providing a fluid under positive pressure that is higher than atmospheric pressure. The fluid is directed in a direction generally opposite a direction of movement of the moving surface such that fluid of high momentum is provided to impinge on water resident within the moving surface and adjacent a leading edge of the doctor blade during movement of the moving surface.

Abstract: A doctoring system is disclosed for a papermaking machine wherein the doctoring system includes a doctor blade and a fluid assist means. The doctor blade is coupled to a doctor blade holder, and is for cleaning a moving surface. The doctor blade holder is coupled to a doctor-back. The fluid assist means is for providing a fluid under positive pressure that is higher than atmospheric pressure and is directed in a direction generally along a direction of movement of the moving surface such that a negative pressure that is lower than atmospheric pressure develops in a negative pressure zone adjacent the moving surface and a following surface of the doctor blade during movement of the moving surface.

Abstract: A cleaning apparatus includes at least one cleaning nozzle that generates and directs a high-pressure liquid jet towards a point of impact on a surface, such as a conveyor belt having a drying screen. A cleaning head has a main opening that faces towards the surface, a discharge opening and a wall with at least one inlet opening defined therein. The at least one cleaning nozzle is disposed outside of the cleaning head and is oriented such that the high-pressure liquid jet passes through the at least one inlet opening before striking the surface. At least one first compressed air supplying device is disposed outside of the cleaning head and is configured to steer liquid from the at least one cleaning nozzle, after it has struck the surface, towards the main opening of the cleaning head.

Abstract: A cleaning apparatus is disclosed for processing a moving surface. The cleaning apparatus includes at least one pad that is coupled to a support shoe. The support shoe is attached to a first end of a plate element, and the plate element includes a second end that is adapted to be received by a doctor blade holder.

Abstract: An apparatus (24) for inserting an endless, flexible clothing (15) in or removing such a clothing from an industrial machine in which the clothing is arranged to run in an endless loop, comprising first and second units (25, 26) between which the clothing is to be fed in an advancement direction (F) essentially transversal to the run direction of the clothing in the machine.

Abstract: A roll cleaning apparatus for a paper making machine has a cleaning member that is mounted to a support member that extends lengthwise relative to a first roll. The cleaning member has a pad and is moveable between an engaged position against the roll during operation, and a disengaged position spaced away from the roll in a non-operating condition. The roll cleaning apparatus includes a drive connected to cause linear reciprocation of the cleaning member and a drive or actuator mounted to move the cleaning member between the engaged and disengaged positions, and operable to bias the cleaning member against the roll in use.

Abstract: A paper machine doctor assembly includes a doctor blade and a blade holder holding the same and a support member mounted on the paper machine frame. An essential feature of the assembly is that a separate pivot mount is provided between the blade holder and the support member, the separate pivot mount enabling the blade holder and the pivot mount to be disconnected from the support member by pulling the pivot mount outwardly and away from the support member.

Abstract: The invention is related to a method for emptying a furnace floor in a soda recovery boiler when the soda recovery boiler is being shut down. The emptying may be started while smelt is still flowing in smelt spouts. The floor is emptied by sucking smelt from the furnace with a smelt eductor. The invention is also related to a device for removing smelt and wash water from a furnace of a soda recovery boiler by means of suction. Negative pressure is generated in the device by conducting pressurized gas into a suction pipe of the eductor so that the pressurized gas is discharged in the discharge direction of smelt and wash water.

Abstract: A belt conditioning method, apparatus and paper machine employing the method and apparatus are provided. The belt method and apparatus include multiple conditioning devices using chemicals to condition water impermeable surfaces of paper machine belts, such as transfer belts and prevent deposits from accumulating on the belts. In one embodiment, the belt supports a web at a first portion of the belt's loop and is separated from the web at a second portion. The conditioning apparatuses are placed in the second portion.

Abstract: An electrode mixture paste (5) is applied on both sides of a strip of core material (1) as it runs along its lengthwise direction, and the coating thickness of the paste (5) is adjusted as the core material (1) coated with the paste (5) passes through a gap between a pair of scraper tools (16a, 16b). Tips (18) provided to the scraper tools (16a, 16b) scrape off the paste (5) to form a paste-coated portion of a predetermined width. The electrode mixture paste (5) scraped off with the tips (18) is returned through recesses (19) on the upstream side of the tips (18) in the running direction of the core material, so as to prevent the phenomenon where the coating thickness is increased at both side edges of the paste-coated portion. Thus, a method for applying electrode mixture paste is realized that can prevent the phenomenon where the coating thickness is increased at both side edges of the paste-coated portion and prevent process failures such as deformation of paste-coated sheet.

Abstract: The present invention relates to a method and apparatus for filling and cleaning a pulp tower. The invention is most suitable for filling and cleaning high-consistency pulp towers, bleaching towers, storage tanks and similar towers containing fiber suspensions, of the wood-processing industry. The apparatus and method according to the invention for filling and cleaning a pulp tower, in which method pulp is fed into the pulp tower either through its cover (10) or at least feed devices (24) arranged at its top, are characterized in that the space surrounding the feed device (24) is washable at the same time as the pulp is fed into the tower by means of washing devices (28, 30, 32) arranged in connection with the feed devices.

Abstract: The invention relates to an arrangement and a method for sealing of a pocket space between drying cylinders (2, 3) in a paper machine or similar. In the method for sealing of the pocket space: a wire (5) is moved supported by the first and the second cylinder (2, 3, 4), a gap between the pocket space (15) and the space outside (24) it is sealed by a runnability component (6), which comprises at least a sealing surface (19, 22) and a blow nozzle (21) provided with a nozzle slot (26) of a size of 0.5-3.5 mm and elongated in the cross direction, the sealing surface (19, 22) is kept at a distance of 5-15 mm from the moving wire (5), air is blown with the blow nozzle (21) from a blow point (27) and along the sealing surface (22) towards a sealing point (16) and further via the sealing point (16) away (24) from the pocket space. The invention comprises also a runnability component (6) and a method for manufacturing the same.

Abstract: The invention relates to a device (11) for stabilising the transport of a material web (12) on the upper face of an air-permeable machine clothing (10), in particular a fibrous web. The device is located on the underside of the machine clothing directly upstream of an intake nip in the direction of travel (17) of the web, said nip being formed by a roll (5) and the machine clothing, and comprises a first negative-pressure zone (19) and at least one vacuum opening (20) that faces essentially in the opposite direction to the direction of travel of the web, communicating with the first negative-pressure zone of the device. This permits the boundary layer (23) of air that is carried along by the underside of the machine clothing to be at least partially sucked from said clothing into the first negative-pressure zone.

Abstract: A static dewatering element (10) for a web forming machine has a thermally sprayed coating (26) manufactured of powder particles (34). The powder particles (34) are agglomerates composed of primary particles (36). The average size of the primary particles (36) is smaller than 0.5 ?m. The invention also relates to a method for covering a static dewatering element designed for a web forming machine.

Abstract: An apparatus for cleaning and cooling a liquor nozzle, the nozzle including at least a liquor tube for feeding liquor and chemicals into a furnace of a recovery boiler. The apparatus includes an outer casing tube, which defines a space whereto conduits are provided for introducing water and steam to generate an emulsion or a conduit for introducing emulsion generated by the water and steam and the surface of which is provided with openings, such as pores or holes, for discharging the emulsion formed by water and steam through the outer casing.

Abstract: An apparatus to produce a fibrous web having a three-dimensional surface structure, especially a paper, cardboard or tissue web, includes a headbox, a forming element, especially a forming roll, a structured fabric and a dewatering fabric, whereby the structured fabric and the dewatering fabric run together and form a stock infeed nip and are carried over the forming element whereby the structured fabric is the inside fabric and the dewatering fabric is the outside fabric and whereby fibrous suspension is fed into the stock infeed nip by way of the headbox. At least one catch pan is provided in the area of the outfeed nip which is formed between the forming element and the structured fabric coming off it for water, fibers, fines and/or similar substances accumulating in the area of this outfeed nip.

Abstract: A pulp washer including: a cylindrical assembly of trays to receive pulp, wherein the assembly rotates the trays through at least one wash stage; a housing having a header to direct pulp to the trays and the at least one wash stage, wherein the housing has at least one access port aligned with one or more of the trays; a screen plate in each tray of the assembly, wherein the screen plate has apertures sized to retain pulp fibers and allow liquid to pass through the plate, and a screen hinge attached to a side edge of the screen plate and to the tray, wherein the screen plate pivots about the hinge to allow a cleaning spray to be applied to an outer screen plate surface and a back screen plate surface.

Abstract: Scraping apparatus for the paper industry, of the type which consists of a scraping blade (l), a support (s) for the scraping blade (l) with a pivot swivel pin (e) with respect to a tray (4), said tray being supported (4) on the frame (b) of the apparatus, characterized because magnetic means are used to exert magnetic forces between the tray (4) or from the fixed element to it and the frame (b), and there are means of action on said magnetic means to activate/deactivate the magnetic forces between the tray (4) and the frame (b). The magnetic means consist of at least one zone (z) of ferromagnetic material and several permanent magnets or electromagnets (1) placed on the tray (4)-frame (b) in a conjugate/corresponding manner.

Abstract: The invention relates to an apparatus and a method for removing a broken pulp web from a pulp dryer. The apparatus includes a maintenance platform arranged at the first or the second end of the pulp dryer, outside the walls of the pulp dryer; a device for shifting the maintenance platform in a substantially vertical direction to a desired height with respect to the pulp dryer, and an extraction device fixed to the edge of the maintenance platform facing the dryer for pulling a broken pulp web out of the pulp dryer.

Abstract: Doctor blade for the paper industry, comprising a scraping plate (1) and holding means (p) for the scraping plate which in turn are held by a frame (a) the ends of which are securely fastened (2) by two fastening points (pf) to a stationary structure (f), characterized in that it comprises: a) mechanical means for adjustable fastening (3) between at least one end (2) of the frame and the stationary structure (f) in such a way that the distance (d) between the two fastening points (pf) can be varied by the user; and b) means for incorporating an additional mass (5) in adjustable quantities.

Abstract: A device for protecting a spraying equipment and surroundings in a paper or board machine, for applying a treatment medium onto a moving surface, comprises a protecting cover forming a single chamber having the spraying equipment located therein and which is open towards the moving surface in connection with an application zone. Two wall elements of the protecting cover extend in the cross-machine direction on either side of the application zone, and define machine-wide gaps with the moving surface. The protecting cover includes a sealing arrangement arranged in connection with the gaps to control and restrict passage of air and contaminants through the gaps; a system for a controlled supply of capture air for capturing contaminants within the space; and an evacuating system for a controlled, continuous evacuation of the capture air with contaminants from the chamber. An associated method of using such a device is also provided.

Abstract: An apparatus is described for cleaning papermaking felt by applying a low concentration of a cleaning solution through the oscillating needle nozzles. The detergent is applied intermittently while paper is being manufactured. Each cleaning period lasts for at least the length of time required for the nozzles to cover the entire surface of the felt, and preferably twice that period of time. The application of cleaning solution is then discontinued for a period of time. This cycle is repeated continuously as the paper is being manufactured. The apparatus includes a first cleaning chemical reservoir, a second cleaning chemical reservoir, a high pressure pump coupled to the first and second reservoirs, and a control unit having programming for selectively injecting the chemicals.

Abstract: Tissue products are described that have been topically treated with a chemical additive, such as a softener. The softener may be, for instance, a polysiloxane. The polysiloxane is topically applied to a tissue sheet, such as a single ply sheet, so as to form a Z-directional gradient in the sheet. Particular, most of the polysiloxane remains on the surface of the tissue product as opposed to migrating to the center of the sheet. In this manner, tissue sheets are formed with improved softness at lower levels of polysiloxane and without the need for applying any surfactants to the sheet. A system for applying chemical additives to tissue sheets is also described. The system includes a chemical additive applicator, such as a meltblown die that emits the chemical additive through a plurality of orifices. In one embodiment, the system includes a device for periodically cleaning the orifices during application of the chemical additive.

Abstract: A washer for washing and dewatering cellulosic pulp is disclosed, comprising a rotary drum with a plurality of external compartments defined by axial compartment walls distributed along the drum's circumference, a stationary cylindrical casing enclosing the drum, whereby a ring-shaped space is defined between the casing and the drum and where longitudinal seals divide the ring-shaped space into a forming zone for forming the pulp, at least one washing zone for washing the pulp at overpressure, and a discharge zone for feeding out the washed pulp, and the filtrates from different washing stages are collected in a peripheral valve located at the drum's end wall, the filtrate stages are separated by seals in the valve, and at least some of the valve seals are displaced in relation to the corresponding longitudinal seal, as seen in the direction of rotation of the drum.

Abstract: A device for removing a liquid, dusty or solid substance from a moving fabric or web. A roll is placed transversely in relation to the moving fabric or web and arranged to rotate around a rotation axis. The roll includes an outer mantle through which a liquid or air flow can enter the inside of the roll. The rotating roll is placed inside a chamber. The chamber includes an opening in a direction of the rotating axis. The opening is arranged to expose at least a part of the outer mantle such that the moving fabric or web tangential to the chamber can be supported against the outer mantle. At least a spiral, screw or threaded structure is arranged inside the rotating roll at a distance from the outer mantle, and is arranged to rotate around a rotating axis and to transfer liquid or air that has entered the roll in the direction of the rotation axis.

Abstract: A doctor assembly is disclosed for use in a paper-making machine. The doctor assembly includes a doctor blade holder into which a doctor blade may be inserted and the doctor blade holder includes a pressure plate, pressure adjustment system, a support tray, and a bracket in accordance with an embodiment. The pressure plate is for supporting and aligning the doctor blade in a cross machine direction for application to a machine roll. The pressure adjustment system is for adjusting the pressure applied to the machine roll by the doctor blade, said pressure adjustment means including at least one fluid reservoir having a wall that contacts the pressure plate. The support tray for supporting the at least one fluid reservoir, and the support tray includes at least one bracket alignment feature. The bracket is attached to the support tray for pivotal attachment to the pressure plate.