Abstract: A press felt (100) has a seam and a web-side and a machine-side. The press felt (100) has a first fiber layer (131) on the web-side, a second fiber layer (132) on the machine-side, and at least one woven base fabric (110) and at least one spiral fabric (120) between the fiber layers (131, 132).

Abstract: A measurement system for monitoring a gap adjustment mechanism of a processing device which has oppositely positioned processing elements with a gap between them. The measurement system has a first measuring device to measure information describing a position of that processing element which is moved by at least one actuating unit of the gap adjustment mechanism for adjusting the size of the gap, and at least one second measuring device to measure information describing a position of the at least one actuating unit. The measurement system has a data processing device configurable to determine the condition of the gap adjustment mechanism based on the information describing the position of the processing element and the information describing the position of the at least one actuating unit. Additionally, a method for monitoring a condition of a gap adjustment mechanism of a processing device.

Abstract: A slitter-winder for fiber webs has an unwinding section (10), a slitting section (20) and a winding section (30) and is configured to unwind, slit and wind a thick fiber web having a basic weight of at least 200 g/m2 to customer rolls (33). The unwinding section (10) has a first unwinder (11) and a second unwinder (12) for unwinding the thick fiber web from a parent roll of full-width thick fiber web (W11, W12), and a joining device (16, 17) for joining a beginning end of a thick fiber web (W11) coming from a parent roll in the first unwinder to an end of a thick fiber web (W12) coming from a parent roll in the second unwinder by forming a joint (J). The winding section (30) has a cutting device (35) for cutting and removing joint part(s) of the thick fiber web from the winding section (30).

Abstract: A plurality of studs mount a doctor blade holder to a doctor back in a fiber web machine for slidable extraction of the doctor blade holder in the cross machine direction. Each stud (15) has a body (16) with a cylindrical center segment with a protruding nonround flange (17) formed as a single piece with the center segment. Opposed flats of the nonround flange of the body (16) may be engaged by the opposed parallel jaws of a conventional wrench allowing ready attachment of the studs to the doctor blade holder and subsequent installing within the channel of a rail which is mounted to the doctor back. A slide bar may be fixed to the doctor blade holder to extend out of the rail for engagement and extraction of the doctor blade holder.

Abstract: A conical refining filling (80) for a conical refiner (10) for refining fibrous material has a first end (80a) of smaller diameter and a second end (80b) of larger diameter. The refining filling has an inner circumference with a refining surface (82) provided with refining bars (84) and refining grooves (86), and an outer circumference (80OC). The refining filing (80) has at least one projecting part (110, 115) projecting away from the outer circumference (80OC) and extending at least partly over the outer circumference (80OC) in at least a partly circumferential direction (CD) of the refining filling (80), and at least one open section extending through or past the at least one projecting part (110, 115).

Abstract: A pressure screen for use in a fiber web product process (10) has an inlet zone (12), a basket having an accept zone (14) and a reject zone (20). The pressure screen (10) has a housing (28) inside which a rotor (27) is located. The reject zone (20) of the pressure screen (10) has a cover (22) forming a rejects chamber (21) for the reject zone (20). The cover (22) of the rejects chamber (21) of the screen (10) is removable by a reopenable attachment means (25, 29) attached to the housing (28) of the screen (10).

Abstract: At least one infrared element arrangement having at least one infrared element (3) comprising a plurality of infrared radiators (4) is mounted on a frame moveable with respect to a synthetic filter fabric mounted to a filtering surface. The frame may have wheels or the like such that the infrared radiators may be moved along the length of the filtering surface to heat the synthetic filter fabric (6) to a temperature of 100 to 160° C. for shrinking the fabric (6) on the filtering surface (5).

Abstract: A refining segment (4) for a refiner (1) for refining lignocellulose-containing fibrous material has an inner end edge (20) and an outer end edge (21) opposite to the inner end edge. A refining surface (5) has refining bars (25) and refining grooves (26) therebetween and at least one recess (27, 27?, 27?) extending from the outer end edge of the refining segment at least partly towards the inner end edge for forming at least partly at least one backflow guide groove (28) extending from the outer end edge of the refining segment at least partly towards the inner end edge. A volume of the at least one recess is arranged to decrease towards the inner end edge for providing the volume of the at least one backflow guide groove to decrease towards the inner end edge.

Abstract: A slitter-winder for fiber webs has an unwinding section (10), a slitting section (20) and a winding section (30) and is configured to unwind, slit and wind a thick fiber web having a basic weight of at least 200 g/m2 to customer rolls (33). The unwinding section (10) has a first unwinder (11) and a second unwinder (12) for unwinding the thick fiber web from a parent roll of full-width thick fiber web (W11, W12), and a joining device (16, 17) for joining a beginning end of a thick fiber web (W11) coming from a parent roll in the first unwinder to an end of a thick fiber web (W12) coming from a parent roll in the second unwinder by forming a joint (J). The winding section (30) has a cutting device (35) for cutting and removing joint part(s) of the thick fiber web from the winding section (30).

Abstract: A belt (10) for a fiber web machine has an inner surface (11) and an outer surface (12). A plurality of parallel dewatering grooves are arranged in a first direction (D1) on the outer surface (12) of the belt (10), each dewatering groove having a width. A first dewatering groove (21) has shallow portions (30) having a first depth (32), and deep portions (40) having a second depth (42), which first and second depths (32, 42) are determined from the outer surface (12) of the belt (10) in a depth direction, wherein the first depth (32) is smaller than the second depth (42).

Abstract: A set for maintenance of a doctor blade (10) positioned within a doctor blade holder (11) in a fiber web machine has a portable device (14) for moving the doctor blade (10) out from the doctor blade holder (11). A prolonged doctor blade holder (11) extends outwardly from the doctor blade holder, and a safety cage (15) is positioned in the area of an end of the doctor blade holder (11). The invention also relates to a doctor arrangement for a fiber web machine.

Abstract: A filter sector assembly for a disc filter, which disc filter has a fiber suspension containing bath and a core assembly adapted to rotate on a horizontal axis. The filter sector assemblies are rotatably supported with relation to the bath on the core assembly. The filter sector assemblies are spaced along the core assembly and supported on the core assembly. Each filter sector assembly (50) has two adjacent filter sectors (10A; 10B) releasably fixed to a bent support plate (30). The two adjacent filter sectors (10A; 10B) are attached as a pair of filter sectors (10A; 10B) by fastening the support plate (30) to the core assembly (21; 21A, 21B) of the disc filter.

Abstract: To minimize the cost of a fiber web due to the web, particularly a board web, being manufactured overly thick to compensate for loss of caliper in the reel-up, the web is made thicker just for the inner layers of what will become a parent roll. The caliper of the web is measured as or after it is unwound. A caliper curve of the parent roll as a function of the diameter of the parent roll is calculated as a function of the diameter of the parent roll and/or the customer roll. The fiber web is adjusted by changing running parameters of the production line: web speed i.e. production speed, headbox-flow, head-box consistency, coating weight of the coating paste or calender nip load.

Abstract: A press felt (100) has a seam and a web-side and a machine-side. The press felt (100) has a first fiber layer (131) on the web-side, a second fiber layer (132) on the machine-side, and at least one woven base fabric (110) and at least one spiral fabric (120) between the fiber layers (131, 132).

Abstract: A monofilament yarn (10) has a polygon cross-section having a width and a height, which width is greater than the height, and four corners (11, 12, 13, 14) of which the first two opposite corners (11, 13) have angles of over 90 degrees, and the second two opposite corners (12, 14) have angles under 90 degrees, said width being 0.1 to 3 mm. The rounded first two opposite corners have a radius of 0.1 to 0.15 mm, and the rounded second two opposite corners have a radius of 0.075 to 0.1 mm. The yarn may be used to fabricate an industrial textile, which may be a papermaking fabric such as a dryer fabric or a forming fabric, or a filter fabric, such as a disc filter, a horizontal vacuum belt filter, a belt filter press, a twin wire press, a drum filter, a pan filter, a gravity table or a filter press.

Abstract: A refining segment (4, 8) for refining fibrous material, and a refining segment (4, 8) for a refiner (1) for refining fibrous material is formed by arranging at least one set of profiled wires (22) next to each other and substantially immovable with respect to each other, wherein a width (Wa) of a bottom (22a) of the profiled wire (22) is different from a width (Wb) of a top (22b) of the profiled wire (22), to form at least one refining bar element (24), and fastening the at least one refining bar element (24) onto a back plate (19), wherein said back plate forms a body of the refining segment (4, 8), by applying at least one solidifying substance (25) between the at least one refining bar element (24) and the back plate (19).

Abstract: An industrial textile has a double warp. Yarns (111, 112) of a first warp and yarns (131, 132, 133, 134) of a weft are bonded to each other according to a first predetermined pattern, and yarns (121, 122) of a second warp and the yarns (131, 132, 133, 134) of the weft are bonded to each other according to a second predetermined pattern. The first predetermined pattern and the second predetermined pattern form a textile structure, which includes the yarns (131, 132) of the weft on a first level (L1) and the yarns (133, 134) of the weft on a second level (L2). The yarns of the weft having smaller diameter are configured to alternate with yarns of the weft having a larger diameter on the first level (L1).

Abstract: A plurality of studs mount a doctor blade holder to a doctor back in a fiber web machine for slidable extraction of the doctor blade holder in the cross machine direction. Each stud (15) has a body (16) with a cylindrical center segment with a protruding nonround flange (17) formed as a single piece with the center segment. Opposed flats of the nonround flange of the body (16) may be engaged by the opposed parallel jaws of a conventional wrench allowing ready attachment of the studs to the doctor blade holder and subsequent installing within the channel of a rail which is mounted to the doctor back. A slide bar may be fixed to the doctor blade holder to extend out of the rail for engagement and extraction of the doctor blade holder.

Abstract: A press felt for use in paper, cardboard or tissue machines has at least one base fabric (110), and fiber layers (120, 121) attached to the base fabric (110). The press felt fiber layers (120, 121) include thermoplastic elastomer fibers of thermoplastic elastomer originating from bio-based raw material and/or carbon-dioxide based raw material.

Abstract: A pressure screen for use in a fiber web product process (10) has an inlet zone (12), a basket having an accept zone (14) and a reject zone (20). The pressure screen (10) has a housing (28) inside which a rotor (27) is located. The reject zone (20) of the pressure screen (10) has a cover (22) forming a rejects chamber (21) for the reject zone (20). The cover (22) of the rejects chamber (21) of the screen (10) is removable by a reopenable attachment means (25, 29) attached to the housing (28) of the screen (10).