Patents by Inventor Pentti Virtanen
Pentti Virtanen 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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Patent number: 8906201Abstract: The present invention relates to a method of manufacturing paper or cardboard, wherein paper or board pulp is diluted with an aqueous composition, which is formed from colloidal-size particles of carbonate and bicarbonate, and other states of carbonate in an aqueous solution, so that the pH in the aqueous solution remains essentially at a value of 6.0-8.3 during the formation, and water is removed from the pulp by draining, pressing, and drying. The invention also relates to a method of manufacturing the aqueous composition used for this purpose.Type: GrantFiled: April 21, 2011Date of Patent: December 9, 2014Assignee: Nordkalk Oy AbInventors: Sakari Saastamoinen, Pentti Virtanen
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Patent number: 8758566Abstract: The present invention relates to a process for manufacturing paper or board, wherein paper or board pulp is diluted with acidic water and wherein the pH value of the pulp is raised with an alkali simultaneously with increasing the solids content of the pulp by filtration, compression and evaporation on the wire, press and drying sections, and, at the same time, filler is precipitated from the acidic water into the paper or board structure. The invention also relates to moistening of paper or board, with a dry matter content of over 40%, in acidic water, after which the pH value is raised with an alkali, and the paper or board is dried, or it is dried after the moistening without raising the pH value.Type: GrantFiled: June 3, 2011Date of Patent: June 24, 2014Assignee: Nordkalk Oy ABInventors: Pentti Virtanen, Sakari Saastamoinen
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Publication number: 20130199745Abstract: The present invention relates to a fibre product that contains pulp fibre or wood fibre, wherein filler particles are attached between the fibres and to the fibrils, part of the particles consisting of chemically structured kaolin agglomerates or granules, and a part consisting of carbonate that is formed from a corresponding oxide or hydroxide by means of carbon dioxide. The invention also relates to a manufacturing method of such a fibre product.Type: ApplicationFiled: November 4, 2011Publication date: August 8, 2013Applicant: NORDKALK OY ABInventors: Pentti Virtanen, Sakari Saastamoinen
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Patent number: 8480018Abstract: Method for the preparation of finely divided calcium hydroxide, where calcium oxide is comminuted in an impact disintegrator into which in addition to the calcium hydroxide a small amount of water is led to wet the particles obtained and to bind the dust. The calcium oxide powder is led to a conveyor being in connection with the impact disintegrator and operating as a pre-quencher, to which conveyer water is added and where the material is subjected to a kneading effect. The material which is a mixture of calcium oxide and calcium hydroxide is led from the conveyor to a cistern operating as post-quencher, to which cistern the remaining portion of the total water amount required for quenching is added. The amount of water added to the impact disintegrator and to the pre-quencher is altogether 20 . . . 50% of the total amount of water required for quenching, preferably about ? of the total amount of water required for quenching, and the amount of water added to the post-quencher is 80 . . .Type: GrantFiled: October 29, 2009Date of Patent: July 9, 2013Assignee: Fractivator OyInventor: Pentti Virtanen
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Patent number: 8474738Abstract: An impact mill equipped with transmission machinery (10) to rotate two coaxial rotors (16, 18) of a rotor apparatus (12) by one single driving apparatus (14). The transmission device includes, according to one alternative, a secondary shaft (32; 36b) equipped with a gear pair (28, 30) or a conic gear (29). The first gear (28) rotates a gear (24) at the shaft (20) of the first rotor (16), and the second gear (30) rotates a gear (26) at the shaft (22) of the second rotor (18), but in the opposite direction or at a different speed. The conic gear (29) rotates the gear (24a) at the shaft (20) of the first rotor (16) in one direction, and the gear (26a) at the shaft (22) of the second rotor (18) in the opposite direction.Type: GrantFiled: May 15, 2006Date of Patent: July 2, 2013Assignee: Fractivator OyInventor: Pentti Virtanen
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Publication number: 20130112360Abstract: The present invention relates to a process for manufacturing paper or board, wherein paper or board pulp is diluted with acidic water and wherein the pH value of the pulp is raised with an alkali simultaneously with increasing the solids content of the pulp by filtration, compression and evaporation on the wire, press and drying sections, and, at the same time, filler is precipitated from the acidic water into the paper or board structure. The invention also relates to moistening of paper or board, with a dry matter content of over 40%, in acidic water, after which the pH value is raised with an alkali, and the paper or board is dried, or it is dried after the moistening without raising the pH value.Type: ApplicationFiled: June 3, 2011Publication date: May 9, 2013Applicant: NORDKALK OY ABInventors: Pentti Virtanen, Sakari Saastamoinen
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Publication number: 20130062028Abstract: The present invention relates to a method of manufacturing paper or cardboard, wherein paper or board pulp is diluted with an aqueous composition, which is formed from colloidal-size particles of carbonate and bicarbonate, and other states of carbonate in an aqueous solution, so that the pH in the aqueous solution remains essentially at a value of 6.0-8.3 during the formation, and water is removed from the pulp by draining, pressing, and drying. The invention also relates to a method of manufacturing the aqueous composition used for this purpose.Type: ApplicationFiled: April 21, 2011Publication date: March 14, 2013Applicant: NORDKALK OY ABInventors: Sakari Saastamoinen, Pentti Virtanen
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Patent number: 8354003Abstract: The present invention relates to a porous fiber product, which contains chemical pulp or wood fibers, between which structural filler particles are attached, as well as to a method of manufacturing this product, wherein filler drops are produced in a spray dryer from the aqueous solution of the filler, the drops forming filler particles when the water evaporates, the particles being attached to the chemical pulp or wood fibers.Type: GrantFiled: February 20, 2009Date of Patent: January 15, 2013Assignee: Nordkalk Oy AbInventor: Pentti Virtanen
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Patent number: 8192542Abstract: Method for producing an aqueous suspension, which is based on a hydraulic binder, and a hardened binder product. According to the invention, a composition of blending agents is added in the aqueous phase into the binder, which composition comprises calcium carbonate particles having an average particle size of 2-200 nm, in order to generate an aqueous suspension and, if needed, mineral fillers are added into this suspension, in order to produce a hardening plaster or concrete mixture. Besides calcium carbonate, the composition of blending agents can comprise calcium hydrogen carbonate and meta-kaolin sinter, too.Type: GrantFiled: November 20, 2006Date of Patent: June 5, 2012Assignee: Nordkalk Oyj ABPInventor: Pentti Virtanen
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Publication number: 20110233124Abstract: The present invention relates to an aqueous composition, which has a pH value of 6.0-9.0 and which contains salts or esters or both of carbonic acid at a concentration, which is at least 0.01% calculated from the total weight of the aqueous composition, and flocculants, coagulants, or microparticles or a mixture thereof as retention agents, as well as to a method for manufacturing said composition and to the use of said composition for manufacturing paper, for separating water from solid material in filtration, for water treatment, for waste water treatment and for waste sludge treatment.Type: ApplicationFiled: October 15, 2009Publication date: September 29, 2011Inventor: Pentti Virtanen
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Publication number: 20110192921Abstract: Method for the preparation of finely divided calcium hydroxide, where calcium oxide is comminuted in an impact disintegrator into which in addition to the calcium hydroxide a small amount of water is led to wet the particles obtained and to bind the dust. The calcium oxide powder is led to a conveyor being in connection with the impact disintegrator and operating as a pre-quencher, to which conveyer water is added and where the material is subjected to a kneading effect. The material which is a mixture of calcium oxide and calcium hydroxide is led from the conveyor to a cistern operating as post-quencher, to which cistern the remaining portion of the total water amount required for quenching is added. The amount of water added to the impact disintegrator and to the pre-quencher is altogether 20 . . . 50% of the total amount of water required for quenching, preferably about ? of the total amount of water required for quenching, and the amount of water added to the post-quencher is 80 . . .Type: ApplicationFiled: October 29, 2009Publication date: August 11, 2011Inventor: Pentti Virtanen
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Publication number: 20110061827Abstract: The present invention relates to a porous fibre product, which contains chemical pulp or wood fibres, between which structural filler particles are attached, as well as to a method of manufacturing this product, wherein filler drops are produced in a spray dryer from the aqueous solution of the filler, the drops forming filler particles when the water evaporates, the particles being attached to the chemical pulp or wood fibres.Type: ApplicationFiled: February 20, 2009Publication date: March 17, 2011Applicant: Kautar OyInventor: Pentti Virtanen
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Patent number: 7575630Abstract: A binder mix containing a hydraulic binding agent and an admixture mixed therewith, a process for preparing a hydraulically hardened binder mass, a calcinated kaolin product and a process for preparing the same. A paste-like composition is formed from the hydraulically hardening binding agent, a pozzolanically reacting admixture and water, which, when so desired, contains stone aggregate or similar filler, the paste-like composition is worked and the worked composition is allowed to harden to form the binder mass. The admixture comprises spherical, porous metakaolin agglomerates, the size of which is 2-200 microns and which have an open pore structure. The invention can be used to improve the manufacturing methods of cast concrete products and shorten the manufacturing times, and to provide concrete with better mechanical and chemical properties, as well as improve the fire and frost resistance of concrete.Type: GrantFiled: November 1, 2002Date of Patent: August 18, 2009Assignee: Kautar OyInventor: Pentti Virtanen
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Publication number: 20090158962Abstract: A binder mix containing a hydraulic binding agent and an admixture mixed therewith, a process for preparing a hydraulically hardened binder mass, a calcinated kaolin product and a process for preparing the same. A paste-like composition is formed from the hydraulically hardening binding agent, a pozzolanically reacting admixture and water, which, when so desired, contains stone aggregate or similar filler, the paste-like composition is worked and the worked composition is allowed to harden to form the binder mass. The admixture comprises spherical, porous metakaolin agglomerates, the size of which is 2-200 microns and which have an open pore structure. The invention can be used to improve the manufacturing methods of cast concrete products and shorten the manufacturing times, and to provide concrete with better mechanical and chemical properties, as well as improve the fire and frost resistance of concrete.Type: ApplicationFiled: December 19, 2008Publication date: June 25, 2009Applicant: Kautar OyInventor: Pentti Virtanen
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Publication number: 20090090278Abstract: Method for producing an aqueous suspension, which is based on a hydraulic binder, and a hardened binder product. According to the invention, a composition of blending agents is added in the aqueous phase into the binder, which composition comprises calcium carbonate particles having an average particle size of 2-200 nm, in order to generate an aqueous suspension and, if needed, mineral fillers are added into this suspension, in order to produce a hardening plaster or concrete mixture. Besides calcium carbonate, the composition of blending agents can comprise calcium hydrogen carbonate and meta-kaolin sinter, too.Type: ApplicationFiled: November 20, 2006Publication date: April 9, 2009Applicant: NORDKALK OYJ ABPInventor: Pentti Virtanen
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Publication number: 20090081112Abstract: Method for producing nanosized calcium hydroxide crystals or particles, according to which method the calcium oxide-bearing initial material is brought into contact with carbon dioxide in the aqueous phase. Calcium carbonate crystals or particles are produced in a mixture, the pH of which is below 7. Using the present invention, it is possible to combine the two stages of producing CaCO3 particles into one entity, in which case the overall processing time is shortened and the use of external energy is minimized.Type: ApplicationFiled: November 20, 2006Publication date: March 26, 2009Applicant: NORDKALK OYJ ABPInventor: Pentti Virtanen
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Patent number: 7198841Abstract: A paper, board or non-woven product containing a fiber layer containing cellulosic fibers, plant fibers or other material suitable for making a paper, board or non-woven product. One surface of the fiber layer is treated with pigment particles. The web is treated with microscopic particles whose average size is so small as to permit the particles to adhere to each other by van der Waals forces.Type: GrantFiled: November 4, 2003Date of Patent: April 3, 2007Assignee: Metso Paper OyInventors: Vilho Nissinen, Timo Nyberg, Pasi Rajala, Lars Grönroos, Pentti Virtanen, Veli Käsmä, Hannu Niemelä
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Patent number: 6981308Abstract: A rotating electric machine (1) has a rotor, a stator (2), and stator windings (3, 4). The windings (3, 4) include high voltage cable drawn through slots (5, 6) in the stator (2). Support members (8) are arranged inside the slots (5, 6) along and in contact with the windings (3, 4), said support members (8) comprising a hose (8?) with a substantially triangular cross-section. A wire (9) is extending through and being attached to each support member (8). When mounting the support members (8) air inside a support member (8) is evacuated in order to shrink the support member (8). Then the wire (9) extending through the support member (8) is used to pull the evacuated support member (8) into a slot (5, 6), whereupon the evacuated support member (8) is expanded by releasing the vacuum inside in order to make it clamp a cable inside a slot (5, 6) of the stator (2).Type: GrantFiled: August 11, 2003Date of Patent: January 3, 2006Assignee: ALSTOM Technology LTDInventors: Olof Lundeberg, Pentti Virtanen
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Publication number: 20050000393Abstract: A binder mix containing a hydraulic binding agent and an admixture mixed therewith, a process for preparing a hydraulically hardened binder mass, a calcinated kaolin product and a process for preparing the same. A paste-like composition is formed from the hydraulically hardening binding agent, a pozzolanically reacting admixture and water, which, when so desired, contains stone aggregate or similar filler, the paste-like composition is worked and the worked composition is allowed to harden to form the binder mass. The admixture comprises spherical, porous metakaolin agglomerates, the size of which is 2-200 microns and which have an open pore structure. The invention can be used to improve the manufacturing methods of cast concrete products and shorten the manufacturing times, and to provide concrete with better mechanical and chemical properties, as well as improve the fire and frost resistance of concrete.Type: ApplicationFiled: November 1, 2002Publication date: January 6, 2005Inventor: Pentti Virtanen
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Patent number: 6787196Abstract: Apparatus for forming a paper or board web made from fibers in which the web is treated with calcium hydroxide and then with carbon dioxide gas so as to form calcium carbonate.Type: GrantFiled: October 29, 2003Date of Patent: September 7, 2004Assignee: Metso Paper OyInventors: Vilho Nissinen, Timo Nyberg, Pasi Rajala, Lars Grönroos, Pentti Virtanen, Veli Käsmä, Hannu Niemelä