Abstract: A shoe press belt, and a method for manufacturing and using it. The press belt comprises a base formed of heat-resistant elastomer, inside which base there is a support structure comprising a plurality of support yarns. At least some of the support yarns are heat-resistant polymer yarns, the polymer structure of the material of which comprises a naphthalene group.

Abstract: Foreign matter is removed from a digital hydraulic pressure controller having two portions connectable to each other and each including two valve arrays with a plurality of individually switchable valve means having different flow cross-sections and connected in parallel within a valve array. One valve array of each pressure controller portion can connect a supply line to a controller output line and the other valve array can connect the output line to a drain line. The two pressure controller portions are connected, the valve means having the largest flow cross-section of the valve array of the one portion on the supply line side is opened, the valve means having the largest flow cross-section of the valve array of the other portion on the drain line side is opened and the opened flow path is flushed through the pressure controller with pressurized working fluid, while the other valve means are closed.

Abstract: A device for treating a fiber web, especially a device for applying treatment substance for treating a moving fiber web, has at least one nozzle (10) comprising a channel (11) for the treatment substance, a frame part (12), a tip or end (13) of the nozzle (10) and a treatment substance opening (14) providing a treatment substance spray, which nozzle (10) has a tip groove area (20) adjacent to the treatment substance opening (14). The nozzle (10) has at least one opening next to or at the tip groove area (20) for providing a cleaning fluid flow comprising gas and/or liquid to the tip groove area.

Abstract: A rod-bed assembly has a holder (30) and an insert (20) removably and insertably supported in a groove (31) of the holder (30), the rod-bed assembly being for a rod (10) rotatably supported in a recess (21) on a front side of the insert (20). Longitudinal bending of the holder (30) in a cross-direction is under 0.5%, advantageously under 0.35%, of the longitudinal distance between two profiling loading points of the holder (30).

Abstract: A set changing device of a slitter-winder has a pusher device for pushing completed wound fiber web rolls (10) of partial webs cut with a slitter-winder and carried by carrier means (11, 18?) forward from the winding-up section (1). The pusher device has at least two press rolls. The position of at least one of the press rolls (2, 3) with respect to the body (17) of the pusher device (6) is arranged to change during pushing.

Abstract: An apparatus having a rod or a blade (21) for a device of a fiber web production line, especially a rod-bed or a blade holder or holder assembly for a rod or a blade (21) of a device for coating or sizing a fiber web, particularly a paper or a board web, which assembly comprises a holder (25), in which the rod or the blade (21) is supported on the front side of the holder (25), and which assembly has loading means (24). The assembly further comprises sensors, in particular piezo sensors (10) located between the rod or the blade (21) and the loading means (24) for measuring the loading pressure of the rod or the blade (21) locally.

Abstract: Apparatus for washing and dewatering pulp and a system for controlling this apparatus are provided. The apparatus includes a pair of rotatable press rolls installed in vats and including a press nip therebetween, an inlet for feeding the pulp to the press nip, with one of the press rolls being movable in relation to the other and in which the processing of the pulp is determined by the number of variable operating parameters. The system includes apparatus for utilizing the distance between the press rolls as a variable operating parameter, for setting a desired value for a specific control parameter, for measuring the specific control parameter, and for adjusting at least two of the variable operating parameters during operation to maintain the difference between the desired value and the measured value of the specific control parameter below a predetermined difference.

Abstract: A fiber web is reeled by a reeling drum of a reel-up onto a parent roll. When the parent roll has reached the desired diameter size, reeling is changed from the parent roll onto a new parent roll. The web is cut by jet cutting means and the beginning part of the cut web is directed onto a reeling shaft of a new parent roll. The jet cutting path has a main cutting path and at least one edge area cutting path. The length of the main cutting path is at least 60% of the whole cutting path length from one edge of the web (W) to the other edge of the web (W). A turn-up device for a reel-up has one cutting module (15) and at least one nozzle (11) for jet cutting, which is attached movably and turnably to the module (15) by a cutting arm (12).

Abstract: In a paper or board machine, an elastic roll cover for manufacturing or finishing of a fiber web material having at least one layer of rubber mixture, wherein the at least one layer of rubber mixture contains synthetic fiber polymer in powder form and less than 10 parts of weight of UHMWPE to 100 parts of weight of the elastomer matrix.

Abstract: A device (30) for applying adhesive is used in fiber web machine slitter-winder. The slitter-winder has an unwinder for a machine roll, slitter blades for slitting the unwound web into partial webs, and a winder forming them into rolls. The device (30) applies adhesive on ends of partial webs attaching the ends of the partial webs onto the web rolls. The device (30) has a support structure (31), a moving element (32) on the support structure and two adhesive nozzles (33, 34) on the moving element. The adhesive nozzles (33, 34) are attached to the moving element (32) such that the nozzles (33, 34) are spaced apart in the direction of travel of the moving element (32) so that a trailing nozzle can be accelerated to operating speed before traversing the partial webs, and a leading nozzle can extend further in the direction of travel than the moving element.

Abstract: The device is for cutting and removing wires from bales, such as pulp bales, paper bales and the like. The device has at least one cutting unit that has a cutting tool for cutting off a wire that is arranged around a bale, and at least one winding unit that has a winding tool for unwinding the cut wire from the bale. The cutting tool has an outer cutter and an inner cutter which are coaxially arranged and rotatable with respect to each other. Each cutter has a cutting edge which are arranged to be moved towards each other when the cutters are rotated towards each other in a certain direction, in order to cut off objects, preferably bale wires, between them.

Abstract: Methods for processing pulp in an apparatus for washing and dewatering pulp and a system for controlling this apparatus are provided. The apparatus includes a pair of rotatable press rolls installed in vats and including a press nip therebetween, an inlet for feeding the pulp to the press nip, with one of the press rolls being movable in relation to the other and in which the processing of the pulp is determined by the number of variable operating parameters. The method includes utilizing the distance between the press rolls as a variable operating parameter, setting a desired value for a specific control parameter, measuring the specific control parameter, and adjusting at least two of the variable operating parameters during operation to maintain the difference between the desired value and the measured value of the specific control parameter below a predetermined difference. Systems for controlling this apparatus are also disclosed.

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 movable support apparatus (10), supported on a floor and movable between at least two target stations, for receiving, moving and handing over rolls, winding shafts (1) and/or machine reels (4) intended for the handling of a fiber web. The movable support apparatus (10) has support members (12) for holding up the load being handled (1, 4) at both its support ends (2) and is adapted to be supported on a floor with at least one pressure medium cushion element (40). A handling system includes the movable support apparatus (10). Rolls, winding shafts (1) and/or machine reels (4) may be handled with the movable support apparatus (10). The movable support apparatus may be used as a movable winding stand for the winding of a fiber web (W).

Abstract: A digital hydraulic controller has a feed line, a drain line, an output line and a plurality of individually switchable on/off valves which selectively connect the feed line to the output line or which connect the output line to the drain line. A controlled quantity is detected which includes a pressure and/or a flow rate of a fluid in the output line. One of the valves is selected to be switched to control the amount and direction of fluid passing through the valve for controlling the controlled quantity to approach a target value. A test sequence is performed including calibration of the individual valves by alternately opening two of the valves, one of which connects the feed line to the output line and the other connects the output line to the drain line, and by calculating and setting calibration values for the individual valves.

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: An arrangement for treating a fiber web, in particular for sizing paper and board web (W), using a sizer (10) which has sizing equipment (3, 4) located on both sides of the web (W) and size press rolls (5, 6) located on both sides of the web (W) in between of which a size nip is formed. The web (W) when approaching the sizer (10) is first guided past the size nip of the sizer (10) in a process direction (D) and then is turned into an opposite direction (OD) in relation to the process direction (D) by at least one turning guide roll (15) such that the top side (TS) of the web (W) is sized by sizing equipment (4) located below the web (W).