公开(公告)号：US12017877B2

公开(公告)日：2024-06-25

申请号：US17838188

申请日：2022-06-11

Applicant: Valmet Technologies Oy

Inventor： Jaakko Haapanen ,  Henry Virta ,  Kenneth Åkerlund

IPC: B29C65/00 ,  B65H19/18 ,  B65H19/20 ,  B65H21/00 ,  B29C65/56 ,  B29C65/60 ,  B29C65/74 ,  B29C65/78 ,  B29C65/80

CPC classification number: B65H19/1852 ,  B65H19/1857 ,  B65H19/1889 ,  B65H19/20 ,  B65H21/00 ,  B29C65/568 ,  B29C65/609 ,  B29C65/741 ,  B29C65/7435 ,  B29C65/7437 ,  B29C65/7832 ,  B29C65/7847 ,  B29C65/80 ,  B29C66/8145 ,  B65H2301/4148

Abstract: A method for joining ends of fiber webs with a device comprising a tool element with a gripping device and a traversing punching device. A run of the fiber web from the emptying parent roll is moved to a joining position at the tool element. The trailing end of the parent roll fiber web is cut upstream from the joining position and the fiber web is attached to the tool element by a gripping device of the tool element. An end of a new roll fiber web is guided to contact with and to an overlapping position with the trailing end of the parent roll fiber. The traversing punching device is moved across the width direction of the fiber webs and makes at least one joint cut and joins the fiber webs. The new fiber web is cut downstream from the joint, and then tension control is turned on.

公开(公告)号：US12006628B2

公开(公告)日：2024-06-11

申请号：US18084720

申请日：2022-12-20

Applicant: Valmet Technologies Oy

Inventor： Juha-Pekka Huhtanen ,  Tuomo Aho

IPC: D21F1/00 ,  D21F1/80 ,  D21F3/04 ,  D21F3/08 ,  D21F9/00 ,  D21G9/00 ,  D21H11/18

CPC classification number: D21F1/0009 ,  D21F1/80 ,  D21F3/04 ,  D21F3/08 ,  D21F9/003 ,  D21G9/0027 ,  D21H11/18

Abstract: The invention relates to a system of producing MFC (micro fibrillated cellulose) having a process device (30) of a pulper, a refiner or a screen configured to process MFC suspension to consistency of 0.5-5%. The system has a continuous pressing means (15; 25, 26) configured to dry the MFC suspension to a consistency of 6-60%. A method of producing MFC has at least one process stage (30) which processes a MFC suspension to a consistency of 0.5-5% by a process device (30). In the process stage the MFC suspension is pulped in a pulping stage in a pulper and/or refined in a refining stage by a refiner and/or screened in a screening stage by a screen. The MFC suspension having the consistency of 0.5-5% is dried in a drying stage of continuous pressing (15, 25, 26) by continuous a pressing device (15, 25, 26) to a consistency of 6-60%.

公开(公告)号：US11925884B2

公开(公告)日：2024-03-12

申请号：US16666258

申请日：2019-10-28

Applicant: Valmet Technologies Oy

Inventor： Peter Ohlenschlaeger

IPC: B01D21/00 ,  B01F23/232 ,  B01F25/312 ,  C02F1/24 ,  B01F101/00

CPC classification number: B01D21/0084 ,  B01F23/232 ,  B01F25/312 ,  C02F1/24 ,  B01F2101/305

Abstract: A flotation device having a flotation tank for receiving liquid to be purified, a saturator for receiving a pressurized liquid-gas mixture and at least one feeder. A line leads from the saturator to the feeder through which the pressurized liquid-gas mixture may be introduced into the flotation tank. The feeder includes a flow channel that has different flow cross sectional areas along the extension thereof. The flow channel may be a Venturi nozzle.

公开(公告)号：US11898310B2

公开(公告)日：2024-02-13

申请号：US17432458

申请日：2020-02-18

Applicant: Valmet Technologies Oy

Inventor： Petteri Vuorio ,  Håkan Sjöström

IPC: D21D1/30 ,  B02C7/12

CPC classification number: D21D1/306 ,  B02C7/12 ,  D21D1/30 ,  D21D1/303

Abstract: A processing plate (4, 12) for mechanically processing pulp. The plate has projecting parts (6, 7, 14, 15). The projecting parts (7, 15) have a radially inner part (28) having an inclined ascending wall (29) towards the outer periphery (23) of the plate and a radially outer part (30) having an inclined descending wall (31) towards the outer periphery (23) of the plate (4, 12). The inner and outer parts (28, 30) are radially coupled to each other by a ridge (32) along a coupling line (CL). The walls (29, 31) are mutually connected only partly so that they have in common only a crest section (40) of the ridge (32) which crest section (40) is less than a width of at least one of the wall (29) of the inner part (28) and the wall (31) of the outer part (30) at the coupling line (CL).

公开(公告)号：US11788229B2

公开(公告)日：2023-10-17

申请号：US16865324

申请日：2020-05-02

Applicant: Valmet Technologies Oy

Inventor： Lasse Kauppinen

IPC: D21D1/20 ,  D21D1/00 ,  D21H11/18 ,  D21H11/20

CPC classification number: D21D1/002 ,  D21D1/20 ,  D21H11/18 ,  D21H11/20

Abstract: The refining of a fibrous pulp is monitored and controlled by capturing at least one image of a pulp sample, determining the amount of all fibers or non-fibrillated fibers in the at least one image, determining the amount of fibrillated fibers in the at least one image, determining the relation between fibrillated fibers and all fibers or non-fibrillated fibers in the pulp on the basis of the amount of fibrillated fibers and the amount of all fibers or non-fibrillated fibers in the at least one image, generating a control parameter on the basis of the determined relation between fibrillated fibers and all fibers or non-fibrillated fibers in the pulp, and controlling fiber refining by at least one pulp refining device on the basis of the control parameter.

公开(公告)号：US11725344B2

公开(公告)日：2023-08-15

申请号：US17325019

申请日：2021-05-19

Applicant: Valmet Technologies Oy

Inventor： Satu Hagfors ,  Vesa-Matti Riihioja

IPC: D21F3/02 ,  D21F1/40

CPC classification number: D21F3/0227 ,  D21F1/40

Abstract: A belt (10) for a sleeve roll forms a closed loop and has an inner surface (11), an outer surface (12), an elastic body (15), and a reinforcing structure (30). The reinforcing structure has first yarns (31a) arranged to a first direction (D1) of the belt, and second yarns (32a) arranged to a second direction (D2) of the belt which is parallel or substantially parallel to a travel direction of the belt, and/or perpendicular or substantially perpendicular to the first direction (D1). The belt (10) is configured to stretch elastically more in the second direction (D2) than in the first direction (D1) so that it will return to its original length after forces stretching the belt have been removed. This invention further relates to an arrangement including a belt and a sleeve roll. This invention further relates to a use of a belt.

公开(公告)号：US20230220624A1

公开(公告)日：2023-07-13

申请号：US18008625

申请日：2021-06-03

Applicant: Valmet Technologies Oy

Inventor： Marko Loijas ,  Tomi Iisakkila

IPC: D21D1/30

CPC classification number: D21D1/306

Abstract: A blade segment (4, 8) for a refiner (1) for refining fibrous material has a first (20) and a second (21) end edge and a first (22) and a second (23) side edge opposite to the first side edge (22) and a refining surface (5, 9) having blade bars (27, 27a, 27b) and grooves (28, 28a, 28b) therebetween on a front surface (25). At least one opening (14, 15) is on at least at one side edge (22, 23) which extends through the whole thickness of the blade segment body (24). There is at least one feed groove (29) on the refining surface, the feed groove (29) extending from the opening and crossing the blade bars and the blade grooves for feeding the material to be refined across the refining surface. The blade bars (27, 27a, 27b) of the blade segment are interlaced at the feed groove.

公开(公告)号：US20230211359A1

公开(公告)日：2023-07-06

申请号：US18000068

申请日：2020-07-03

Applicant: Valmet Technologies Oy

Inventor： Jan BACKMAN ,  Ralf BACKVIK ,  Roger BECKER ,  Allan CARLSSON ,  Valentina KUCHER ,  Morgan PERSSON ,  Felix SPEGEL ,  Jonas SUNDIN ,  Bengt ERIKSSON

IPC: B04C5/081

CPC classification number: B04C5/081 ,  B04C2009/008

Abstract: A hydrocyclone having a mid-section having a longitudinal axis and a radius, and a fluid injection member releasably connected to the mid-section. The fluid injection member has a dilution passage therethrough and two spaced apart dilution ports, at least one dilution port being at an angle between 15 and 75 degrees relative to the mid-section radius. The injection member comprises a nozzle housing releasably connected to the mid-section, the nozzle housing having a dilution passage therethrough, and a nozzle adapted to be connected to the nozzle housing, the nozzle being planar and having at least one dilution port therethrough, the nozzle being receivable within the dilution passage.

公开(公告)号：US20230118469A1

公开(公告)日：2023-04-20

申请号：US17911999

申请日：2021-05-07

Applicant: Valmet Technologies Oy

Inventor： Robert Mohr

IPC: D21H11/14 ,  D21C3/22 ,  D21C9/18 ,  D21D5/02

Abstract: Recycled fibers are produced from MDF or HDF containing material, for instance for use in MDF or HDF production by steaming (2) the MDF or HDF containing material for a predetermined time to obtain steamed material, subjecting the steamed material to a pulping process (3) to obtain a slurry, screening (4a, 4b) the slurry to remove oversize particles to obtain a screened slurry, dewatering (5) the screened slurry to obtain dewatered fibers and refining or fluffing (6) the dewatered fibers to obtain said recycled fibers. A method for producing MDF or HDF boards using such recycled fibers is also provided. Corresponding systems for producing recycled fibers and producing MDF or HDF boards are also provided.

公开(公告)号：US20230110055A1

公开(公告)日：2023-04-13

申请号：US17955965

申请日：2022-09-29

Applicant: Valmet Technologies Oy

Inventor： Karl Gabrielsson ,  Tony Ingemar Borkenius ,  Ramesh Naidu Penta ,  Sanjay Yallure ,  Shailesh Fulse ,  Robert B. Schiavi

IPC: B01D33/23 ,  B01D33/74

Abstract: A continuous disc filter device including a slurry containing bath, and a disc filter assembly comprising a rotor assembly supported to turn on a horizontal axis and having a filtrate outlet end, a plurality of filter discs spaced apart along the length of the rotor assembly horizontal axis, a plurality of spaced apart discharge conduits, and a plurality of disc filter section support and filtrate channel arms. Each disc filter section has a disc filter section filtrate outlet therein for filtrate to leave the disc filter section. A plurality of spaced apart discharge conduits each includes a discharge conduit housing extending along the rotor assembly horizontal axis and having a longitudinally extending discharge conduit filtrate passageway therein. Each discharge conduit is connected at one end to the rotor assembly filtrate outlet end and connected to respective disc filter section filtrate outlets, and each discharge conduit filtrate passageway is positioned between adjacent filter sections.