Patents by Inventor Olli Tuovinen
Olli Tuovinen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240150962Abstract: 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).Type: ApplicationFiled: October 26, 2023Publication date: May 9, 2024Applicant: Valmet Technologies, Inc.Inventor: Olli Tuovinen
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Patent number: 9267234Abstract: A refiner (1, 2, 3) for refining fibrous material. And a blade element (18) for a refiner (1, 2, 3) intended for refining fibrous material. The blade element (18) having a refining surface (18?), which has blade bars (21, 23) and blade grooves (22, 24) between them. The top surface of at least one blade bar (21, 23) is provided with refining grits (25). The blade element (18) has portions (29, 30) forming a protruding part extending away above the refining surface (26a, 26b) and above the blade bars (21, 23) or the refining grits (25) on the refining surface.Type: GrantFiled: December 24, 2013Date of Patent: February 23, 2016Assignee: Valmet Technologies, Inc.Inventors: Juha-Pekka Huhtanen, Vesa Harju, Markku Partanen, Olli Tuovinen, Petteri Vuorio
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Publication number: 20140217218Abstract: A refiner (1, 2, 3) for refining fibrous material. And a blade element (18) for a refiner (1, 2, 3) intended for refining fibrous material. The blade element (18) comprises a refining surface (18?), which comprises blade bars (21, 23) and blade grooves (22, 24) between them. The top surface of at least one blade bar (21, 23) is provided with refining grits (25). The blade element (18) has portions (29, 30) forming a protruding part extending away above the refining surface (26a, 26b) and above the blade bars (21, 23) or the refining grits (25) on the refining surface.Type: ApplicationFiled: December 24, 2013Publication date: August 7, 2014Inventors: Juha-Pekka Huhtanen, Vesa Harju, Markku Partanen, Olli Tuovinen, Petteri Vuorio
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Patent number: 8172165Abstract: A device for mechanical defibration of wood comprises a defibration surface for processing of wood raw material and loosening of fibers, said defibration surface comprising grinding grits fastened on a metal base surface. The grits (1) fastened on the metal base surface (2) are positioned within a determined distance from each other on the base surface, so that they form a regular defibration surface.Type: GrantFiled: April 28, 2006Date of Patent: May 8, 2012Assignees: Metso Paper, Inc., Myllykoski Oyj, Stora Enso Oyj, M-Real Oyj, UPM-Kymmene OyjInventor: Olli Tuovinen
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Patent number: 7819149Abstract: The present invention provides a novel method and apparatus for producing pulp from lignocellulosic raw material, such as wood or annual or perennial plants, by mechanical defibration. According to the invention, fibers are peeled from the wood by means of grinding grits arranged on a defibration surface, wherein at least 90% of the protrusion difference distribution between adjacent or neighboring grits on the surface belongs to a value region maximally as wide as the average grit diameter. By means of the invention, a reduction in specific energy consumption of up to 50% or even more can be obtained.Type: GrantFiled: June 5, 2006Date of Patent: October 26, 2010Assignees: Metso Paper, Inc., M-real Oyj, Myllykoski Oyj, Stora Enso Oyj, UPM Kymmene OyjInventors: Mikael Lucander, Tomas Björkovist, Olli Tuovinen
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Publication number: 20090308549Abstract: A device for mechanical defibration of wood comprises a defibration surface for processing of wood raw material and loosening of fibers, said defibration surface comprising grinding grits fastened on a metal base surface. The grits (1) fastened on the metal base surface (2) are positioned within a determined distance from each other on the base surface, so that they form a regular defibration surface.Type: ApplicationFiled: April 28, 2006Publication date: December 17, 2009Inventor: Olli Tuovinen
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Patent number: 7564363Abstract: A method and a measuring arrangement for monitoring the condition of a grinder stone of a pulp grinder. A temperature profile for a grinding surface of the grinder stone is determined substantially along the entire length of the grinder stone, a variable representing at least one piece of temperature data of the grinding surface of the grinder stone is determined on the basis of said temperature profile, and the variable representing said temperature data is compared with a reference variable corresponding to said temperature data. If this variable differs from the reference variable in a predefined manner, the state relating to the condition of the grinder stone is identified as abnormal.Type: GrantFiled: May 27, 2005Date of Patent: July 21, 2009Assignee: Metso Paper, Inc.Inventors: Olli Tuovinen, Risto Karojärvi, Juhani Valli
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Patent number: 7169021Abstract: A method for controlling the water jet sharpening sequence of a pulp grinder is provided, wherein a high-pressure sharpening water jet is directed toward a surface of a pulpstone with a water sharpening apparatus. An actual quality value of the fiber pulp is determined for at least one variable, and a target quality value is defined for each of the at least one variable. The actual quality values and corresponding target quality values are transmitted to a control unit that includes an adjustment strategy set for controlling water sharpening of the pulpstone. According to the adjustment strategy, the treatment pressure and/or the treatment interval of the sharpening water jet is controlled relative to an error value between the target quality value and the actual quality value of the fiber pulp. An associated apparatus is also provided.Type: GrantFiled: April 17, 2003Date of Patent: January 30, 2007Assignee: Metso Paper Inc.Inventor: Olli Tuovinen
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Publication number: 20060283990Abstract: The present invention provides a novel method and apparatus for producing pulp from lignocellulosic raw material, such as wood or annual or perennial plants, by mechanical defibration. According to the invention, fibers are peeled from the wood by means of grinding grits arranged on a defibration surface, wherein at least 90% of the protrusion difference distribution between adjacent or neighboring grits on the surface belongs to a value region maximally as wide as the average grit diameter. By means of the invention, a reduction in specific energy consumption of up to 50% or even more can be obtained.Type: ApplicationFiled: June 5, 2006Publication date: December 21, 2006Inventors: Mikael Lucander, Tomas Bjorkovist, Olli Tuovinen
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Patent number: 7086938Abstract: The invention relates to a grinding segment comprising a ceramic part manufactured of grinding ceramic material and provided with a fastening hole, through which the grinding segment is attached to a frame of a grinder stone by means of a fastening bolt. A fastening sleeve is arranged in the fastening hole, and the fastening bolt is supplied through the sleeve. The fastening sleeve is pressed against the frame of the grinder stone due to the fastening force. A space filled with bonding agent is formed between the ceramic part of the fastening sleeve to join them together. The invention further relates to a grinder stone comprising a cylindrical frame and grinding segments according to the invention.Type: GrantFiled: March 15, 2002Date of Patent: August 8, 2006Assignee: Metso Paper Inc.Inventor: Olli Tuovinen
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Patent number: 7000859Abstract: The invention relates to a grinding element, which comprises a substantially planar fastening frame, and where two or more grinding segments made of grinding ceramic material are fastened to the outer surface of the frame by means of bonding agent. The fastening frame preferably comprises at least one fastening hole, and a fastening bolt is supplied through the hole to fasten the grinding element to the frame of the grinder stone. The invention further relates to a grinder stone, where a grinding surface is formed by arranging a required number of grinding elements according to the invention on the outer circumference of the stone's frame.Type: GrantFiled: September 15, 2003Date of Patent: February 21, 2006Assignee: Metso Paper Inc.Inventor: Olli Tuovinen
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Publication number: 20050276305Abstract: A method and a measuring arrangement for monitoring the condition of a grinder stone of a pulp grinder. A temperature profile for a grinding surface of the grinder stone is determined substantially along the entire length of the grinder stone, a variable representing at least one piece of temperature data of the grinding surface of the grinder stone is determined on the basis of said temperature profile, and the variable representing said temperature data is compared with a reference variable corresponding to said temperature data. If this variable differs from the reference variable in a predefined manner, the state relating to the condition of the grinder stone is identified as abnormal.Type: ApplicationFiled: May 27, 2005Publication date: December 15, 2005Inventors: Olli Tuovinen, Risto Karojarvi, Juhani Valli
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Publication number: 20050116072Abstract: A method for controlling the water jet sharpening sequence of a pulp grinder is provided, wherein a high-pressure sharpening water jet is directed toward a surface of a pulpstone with a water sharpening apparatus. An actual quality value of the fiber pulp is determined for at least one variable, and a target quality value is defined for each of the at least one variable. The actual quality values and corresponding target quality values are transmitted to a control unit that includes an adjustment strategy set for controlling water sharpening of the pulpstone. According to the adjustment strategy, the treatment pressure and/or the treatment interval of the sharpening water jet is controlled relative to an error value between the target quality value and the actual quality value of the fiber pulp. An associated apparatus is also provided.Type: ApplicationFiled: April 17, 2003Publication date: June 2, 2005Inventor: Olli Tuovinen
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Publication number: 20040250897Abstract: The invention relates to a grinding element, which comprises a substantially planar fastening frame, and where two or more grinding segments made of grinding ceramic material are fastened to the outer surface of the frame by means of bonding agent. The fastening frame preferably comprises at least one fastening hole, and a fastening bolt is supplied through the hole to fasten the grinding element to the frame of the grinder stone. The invention further relates to a grinder stone, where a grinding surface is formed by arranging a required number of grinding elements according to the invention on the outer circumference of the stone's frame.Type: ApplicationFiled: September 15, 2003Publication date: December 16, 2004Applicant: Metso Paper Inc.Inventor: Olli Tuovinen
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Publication number: 20040166791Abstract: The invention relates to a grinding segment comprising a ceramic part (11) manufactured of grinding ceramic material and provided with a fastening hole (12), through which the grinding segment (10) is attached to a frame (9) of a grinder stone by means of a fastening bolt. A fastening sleeve (14) is arranged in the fastening hole, and the fastening bolt is supplied through the sleeve. The fastening sleeve is pressed against the frame of the grinder stone due to the fastening force. A space filled with bonding agent is formed between the ceramic part and the fastening sleeve to join them together. The invention further relates to a grinder stone comprising a cylindrical frame (9) and grinding segments (10) according to the invention.Type: ApplicationFiled: March 10, 2004Publication date: August 26, 2004Inventor: Olli Tuovinen
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Patent number: 6193180Abstract: An arrangement in a pulp grinder comprising a grindstone (1), a feed chute (2), and a piston to feed wood (3) against the grindstone (1). The arrangement comprises separate pushing members (6), which are arranged to push the wood (3) against the grindstone (1) at essentially the entire width of the feed chute when the percussion piston is moved back to the stroke position to allow the feed of a new batch of wood.Type: GrantFiled: July 12, 1999Date of Patent: February 27, 2001Assignee: Valmet CorporationInventors: Pekka Haikkala, Jouko Hautala, Heikki Liimatainen, Kari Pärssinen, Simo Setälä, Olli Tuovinen
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Patent number: 6109550Abstract: An arrangement for providing continuous grinding in a pulp grinder comprising a feed chute and a piston in the feed chute moving lengthwise of the feed chute for pressing the wood in the feed chute against a grindstone. The arrangement comprises rotary feed members between the piston and the grindstone on the sides of the feed chute for pushing the compressed wood further against the grindstone. Also, the arrangement comprises a closing member that can be pushed between the compressed wood and the piston to prevent the wood from moving backward with the piston as the piston is moved to the initial position, ready for the stroke, to allow the feed of a new batch of wood.Type: GrantFiled: July 22, 1999Date of Patent: August 29, 2000Assignee: Valmet CorporationInventors: Pekka Haikkala, Kari Parssinen, Jouko Hautala, Olli Tuovinen, Heikki Liimatainen, Simo Setala
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Patent number: 6095443Abstract: An arrangement in a pulp grinder comprising a grindstone, a feed chute extending to the grindstone, a piston moving in the feed chute, an auxiliary piston and closing members. In the arrangement, there are recesses on the front of the piston and apertures in the auxiliary piston so that the closing members can be pushed from both sides of the feed chute through the auxiliary piston to the recesses of the piston so that they settle behind the wood pressed by the piston.Type: GrantFiled: July 20, 1999Date of Patent: August 1, 2000Assignee: Valmet CorporationInventors: Pekka Haikkala, Jouko Hautala, Heikki Liimatainen, Kari Parssinen, Simo Setala, Olli Tuovinen
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Patent number: 5964421Abstract: A method and an arrangement for treatment of reject material separated at screening of fibre pulp prepared by grinding wood. In the method reject material is fed against the surface of a grindstone (3) of a pressure grinder immediately before a normal grinding zone (6). The arrangement comprises a reject feeding equipment (12) placed immediately before the normal grinding zone (6) through which the reject material is fed to be ground again.Type: GrantFiled: June 12, 1997Date of Patent: October 12, 1999Assignee: Valmet CorporationInventors: Jouko Hautala, Olli Tuovinen