With Impermeable Belt Structure Or Impermeable Belt Composition Patents (Class 162/358.4)
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Patent number: 11718958Abstract: The object of the invention is to provide a shoe press belt which has an excellent strength while the variation in strength among its parts being suppressed, and to provide a method for producing such a shoe press belt. Provided is a shoe press belt for use in a papermaking machine comprising at least one resin layer, wherein the resin layer comprises a polyurethane resin formed by curing an urethane prepolymer having an isocyanate group with a curing agent having an active hydrogen group, wherein the curing agent comprises one or more polycarbonate diol(s) expressed by the following formulae (1) and (2).Type: GrantFiled: February 18, 2021Date of Patent: August 8, 2023Assignee: Ichikawa Co., Ltd.Inventors: Yuya Takamori, Manami Morinaga
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Patent number: 11686045Abstract: The object of the invention is to provide a shoe press belt which has an excellent strength while the variation in strength among its parts being suppressed, and to provide a method for producing such a shoe press belt.Type: GrantFiled: February 18, 2021Date of Patent: June 27, 2023Assignee: Ichikawa Co., Ltd.Inventors: Yuya Takamori, Manami Morinaga
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Patent number: 11603628Abstract: A shoe press belt for use in a papermaking machine including at least one resin layer, where the resin layer contains a polyurethane resin formed by curing an urethane prepolymer having an isocyanate group with a curing agent having an active hydrogen group, where the urethane prepolymer is obtained by reacting a polyisocyanate compound containing 4,4?-methylene bis(phenylisocyanate) with a polyol compound containing polytetramethylene ether glycol, and the curing agent contains polycarbonate diol(s).Type: GrantFiled: February 18, 2021Date of Patent: March 14, 2023Assignee: Ichikawa Co., Ltd.Inventors: Yuya Takamori, Manami Morinaga
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Patent number: 11377795Abstract: A shoe press belt (10) for a shoe press has an inner surface (11), an outer surface (12), an elastomer body and a support structure (20, 21, 22, 23) for the elastomer body. A plurality of parallel dewatering grooves (50, 50a, 50b) are on the outer surface (12) of the shoe press belt (10), with a ridges (53) provided between two adjacent dewatering grooves (50a, 50b). The dewatering grooves (50, 50a, 50b) have a first wall (60), a second wall (70), and a bottom (80) therebetween. At least the first wall (60) of the dewatering groove (50, 50a, 50b) has a plurality of parallel auxiliary grooves (100, 100a, 100b). A paper, board or pulp drying machine has said shoe press belt (10). A method for installing the shoe press belt (10) is provided.Type: GrantFiled: December 17, 2019Date of Patent: July 5, 2022Assignee: VALMET TECHNOLOGIES OYInventors: Jari Jännetyinen, Vesa-Matti Riihioja
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Patent number: 11306438Abstract: A press cover has at least one polymer layer in which a reinforcing structure is embedded. The reinforcing structure has at least one reinforcing thread as a longitudinal thread which runs in the longitudinal direction of the press cover. The at least one reinforcing thread itself is produced by interlacing a plurality of fibers or fiber bundles with one another. There is also described the use of such a press cover, as well as a press roll and a shoe press.Type: GrantFiled: June 13, 2019Date of Patent: April 19, 2022Assignee: Voith Patent GmbHInventors: Juanhao Zou, Richard Westerholz, Simon Ermert
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Patent number: 10889936Abstract: The invention relates to a press jacket comprising at least one polymer layer, where the polymer layer comprises, or has been produced from, a polyurethane, where the polyurethane has been formed from a prepolymer and a crosslinking agent, and the prepolymer is a reaction product of phenylene 1,4-diisocyanate and of a polyol, where the crosslinking agent comprises the following components: a first component comprising 1,4-butanediol or 1,4-hydroquinone bis(2-hydroxyethyl) ether (HQEE), a second component comprising at least one aliphatic diamine, a third component comprising at least one alkanolamine.Type: GrantFiled: December 20, 2016Date of Patent: January 12, 2021Assignee: Voith Patent GmbHInventors: Delphine Delmas, Hermann Reichert, Uwe Matuschczyk, Michael Wokurek
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Patent number: 10731294Abstract: A shoe press belt includes a polyurethane in which a reinforcement base member is embedded, the polyurethane being in one piece with the reinforcement base member. The polyurethane constituting at least an outer circumferential surface of the shoe press belt is a thermosetting polyurethane obtained by curing an urethane prepolymer using a curing agent. The urethane prepolymer includes a first urethane prepolymer (A) obtained by a reaction between an aromatic diisocyanate and a polyol component containing an aliphatic polycarbonatediol represented by a chemical formula (1). In the chemical formula (1), m is a combination of two or more of integers of not less than 2 and not more than 12, and n is not less than 3 and not more than 33.Type: GrantFiled: April 5, 2016Date of Patent: August 4, 2020Assignee: Yamauchi CorporationInventor: Takahisa Hikida
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Patent number: 10196777Abstract: A shoe press belt with excellent mechanical properties, in particular excellent wear resistance is provided, and a method of manufacturing the shoe press belt for use in a papermaking machine is also provided. The belt is constituted by a resin layer and includes an outer circumferential layer surface contacting a felt. The outer circumferential layer surface is formed with a surface-treated layer, in which part of the resin layer is modified by coating a composition including an isocyanate compound onto a semi-finished outer circumferential layer and by performing a curing treatment.Type: GrantFiled: January 7, 2016Date of Patent: February 5, 2019Assignee: ICHIKAWA CO., LTD.Inventors: Chie Umehara, Shintaro Yamazaki, Yuya Takamori
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Patent number: 10036120Abstract: There is provided a shoe press belt for a papermaking machine, comprising one or more resin layers. At least a part of the resin layers comprises a polyurethane resin comprising polymeric MIDI as an ingredient. The polyurethane resin may be a resin obtainable by reacting one or more curing agent(s) having an active hydrogen group, polymeric MDI and one or more urethane prepolymer(s) having a terminal isocyanate group, the urethane prepolymer(s) being obtainable by reacting one or more isocyanate compound(s) with one or more polyol(s).Type: GrantFiled: January 25, 2017Date of Patent: July 31, 2018Assignee: Ichikawa Co., Ltd.Inventors: Yuya Takamori, Nobuharu Suzuki, Mitsuyoshi Matsuno, Chie Umehara, Yuji Mizoguchi, Taichi Sakai
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Patent number: 9732470Abstract: The purpose of the present invention is to provide a shoe press belt which exhibits improvement in mechanical characteristics such as crack resistance, wear resistance, delamination resistance and bending fatigue resistance, particularly in the surface wear resistance of the shoe press belt and the crack resistance of the bottom regions of water receiving parts. A shoe press belt which is produced by integrating a reinforcing substrate with a polyurethane layer including at least a felt-side layer and in which water-receiving parts are formed in the felt-side layer, wherein the polyurethane equivalent value of the second resin layer including the bottom regions of the water-receiving parts is adjusted so as to be larger than that of the first resin layer including a surface which is to be brought into contact with a felt.Type: GrantFiled: June 13, 2014Date of Patent: August 15, 2017Assignee: ICHIKAWA CO., LTD.Inventors: Shintaro Yamazaki, Yuya Takamori, Chie Umehara, Mitsuyoshi Matsuno, Nobuharu Suzuki
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Patent number: 9328460Abstract: The invention relates to a method and to a device for drying a fibrous web wherein the traveling fibrous web is acted upon by steam and hot, moist air in the region of a preceding drying zone and is then fed to the preceding drying zone of a downstream drying zone comprising a drying cylinder and a hood allocated thereto. Hot air is taken out of the hood allocated to the drying cylinder of the downstream drying zone. To create at least a portion of the steam for the preceding drying zone, condensate and/or fresh water occurring in the drying cylinder of the downstream drying zone is heated by the hot air taken out of the hood by means of a first heat exchanger. Alternatively or additionally for creating at least a portion of the hot, moist air for the preceding drying zone, the hot air taken out of the hood guided through the first heat exchanger is fed to the preceding drying zone.Type: GrantFiled: August 10, 2011Date of Patent: May 3, 2016Assignee: Voith Patent GmbHInventors: Thomas Scherb, Joao V. Boechat
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Patent number: 9169598Abstract: A clothing fabric for a paper machine has two or more endless strips, which are each formed by a film-like web spliced along a joint to form a film-like web that is endless in the direction of circulation of the fabric. The endless strips are connected to one another at the side edges with the joints of two endless strips that are connected to each other are arranged to be offset in relation to one another with respect to the direction of circulation of the fabric.Type: GrantFiled: July 20, 2012Date of Patent: October 27, 2015Assignee: Voith Patent GmbHInventors: Michael Straub, Matthias Hoehsl
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Patent number: 9096707Abstract: Embodiments of the invention provide for paper mill equipment that can better withstand the conditions of a paper mill. Embodiments encompass paper mill equipment that incorporate a polyurethane layer having a hysteresis value of less than 70% and a permanent set of less than 30%. The polyurethane layer includes a polyurethane produced by curing a mixed composition. The mixed composition includes at least a urethane prepolymer (A) and at least a curing agent (B) having an active hydrogen group (H). The urethane prepolymer (A) has at least one terminal isocyanate group and is obtained by reacting at least a polyisocyanate compound (a) with at least a polycarbonate diol compound (b) having a number average molecular weight of at least 1500 g/mol. The curing agent (B) includes at least an amine compound. The elastomer compositions are also useful to coat the acid pickling roller in the steel industry.Type: GrantFiled: February 7, 2013Date of Patent: August 4, 2015Assignee: Dow Global Technologies LLCInventors: Harpreet Singh, William H. Heath, Amarnath Singh, Asfar N. Chowdhury, Marcin Grigoriew, Kaoru Aou
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Patent number: 8986506Abstract: 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.Type: GrantFiled: January 30, 2012Date of Patent: March 24, 2015Assignee: Valmet Technologies, Inc.Inventor: Vesa-Matti Riihioja
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Patent number: 8980062Abstract: An industrial fabric, belt or sleeve and a method of making the fabric, belt or sleeve are disclosed. The industrial fabric, belt or sleeve is produced by spirally winding strips of polymeric material, such as an industrial strapping or ribbon material, around two rolls in a side-to-side manner in which a gap between adjacent edges is formed. A second material, for example a gap filler material, is placed between the adjacent edges, and the adjoining edges are joined by melting the filler material, strips of polymeric material, or both. The gap filler material can have a specific cross-sectional shape corresponding to the gap.Type: GrantFiled: December 26, 2012Date of Patent: March 17, 2015Assignee: Albany International Corp.Inventors: Jonas Karlsson, Anders Nilsson, Mikael Danielsson, Marcus Backstrom
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Patent number: 8764943Abstract: An industrial fabric, belt or sleeve and a method of making the fabric, belt or sleeve are disclosed. The industrial fabric, belt or sleeve is produced by spirally winding strips of polymeric material, such as an industrial strapping or ribbon material, and joining the adjoining sides of the strips of material using ultrasonic welding or laser welding techniques. The fabric, belt or sleeve may then be perforated using a suitable technique to make it permeable to air and/or water.Type: GrantFiled: May 11, 2012Date of Patent: July 1, 2014Assignee: Albany International Corp.Inventors: Dana Eagles, Robert Hansen, Jonas Karlsson
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Patent number: 8608909Abstract: A permeable belt for use in a system for dewatering and/or drying a fibrous web. The permeable belt capable of being subjected to a tension of at least approximately 30 kN/m, the permeable belt having at least one side having an open area of at least approximately 25% and a contact area of at least approximately 10%.Type: GrantFiled: November 23, 2011Date of Patent: December 17, 2013Assignee: Voith Patent GmbHInventors: Thomas ThorĂśe Scherb, Hubert Walkenhaus, Jeffrey Herman, Luiz Carlos Silva
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Patent number: 8568567Abstract: The invention relates to a shoe press belt comprising polyurethane polymer prepared of a urethane prepolymer containing isocyanate groups and a chain extender, the urethane prepolymer being prepared using 1,4-phenylene-diisocyanate (PPDI) and the chain extender comprising methyl-bis(3-chloro-2,6-diethylaniline) (MCDEA).Type: GrantFiled: December 10, 2009Date of Patent: October 29, 2013Assignee: Metso Fabrics Inc.Inventors: Satu Hagfors, Vesa-Matti Riihioja, Marja Ojanen
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Patent number: 8500958Abstract: The invention relates to a transport or processing belt for a machine for the production or treatment of a fiber web, particularly a paper, cardboard or tissue machine, having a paper side and a conveying side and comprising a polymer coating and a textile load-bearing fabric, wherein the textile fabric has a first side facing the paper side and a second side facing the conveying side. The textile fabric is permeable with a permeability of at least 300 cfm, preferably of at least 500 cfm, and the polymer coating extends in one piece from the first side of the textile fabric though the openings of the textile fabric to the second side of the textile fabric.Type: GrantFiled: June 18, 2010Date of Patent: August 6, 2013Assignee: Voith Patent GmbHInventors: John Jeffrey, Michael Spence, Andrew Allum, Paul Rydin
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Publication number: 20130192788Abstract: A paper making shoe press belt includes a reinforcing fiber substrate and a polyurethane laminate. The reinforcing fiber substrate is embedded in at least one layer of the polyurethane laminate. At least one layer of the polyurethane laminate includes a polyurethane obtained by heat-curing a urethane prepolymer together with a mixed curing agent. The urethane prepolymer includes a terminal isocyanate group and is obtained by reacting a diisocyanate compound and a long-chain polyol. The diisocyanate compound includes at least one of toluene-diisocyanate, diphenylmethane-diisocyanate, and paraphenylene-diisocyanate. The mixed curing agent includes 70-99.5 mol % of dimethylthiotoluenediamine and 0.5-30 mol % of a curing agent. The curing agent includes at least one of diethyltoluenediamine and hydroquinone bis (?-hydroxyethyl) ether. An equivalent ratio of active hydrogen groups of the mixed curing agent to isocyanate groups of the urethane prepolymer is from 1.02 to 1.15.Type: ApplicationFiled: July 5, 2012Publication date: August 1, 2013Applicant: ICHIKAWA CO., LTD.Inventors: Takao Yazaki, Shintaro Yamazaki, Yuya Takamori
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Publication number: 20130192787Abstract: A paper making shoe press belt includes a reinforcing fiber substrate and a polyurethane laminate. The reinforcing fiber substrate is embedded in at least one layer of the polyurethane laminate. At least one layer of the polyurethane laminate includes a polyurethane obtained by heat-curing a urethane prepolymer together with a mixed curing agent. The urethane prepolymer includes a terminal isocyanate group and is obtained by reacting a diisocyanate compound and a long-chain polyol. The diisocyanate compound includes at least one of toluene-diisocyanate, diphenylmethane-diisocyanate, and paraphenylene-diisocyanate. The mixed curing agent includes 70-99.5 mol % of dimethylthiotoluenediamine and 0.5-30 mol % of a curing agent. The curing agent includes at least one of 4,4?-methylenebis(2,6-diethyl-3-chloroaniline), 4,4?-methylenedianiline, and 1,4-butanediol. An equivalent ratio of active hydrogen groups of the mixed curing agent to isocyanate groups of the urethane prepolymer is from 1.02 to 1.15.Type: ApplicationFiled: July 5, 2012Publication date: August 1, 2013Applicant: ICHIKAWA CO., LTD.Inventors: Takao YAZAKI, Shintaro YAMAZAKI, Yuya TAKAMORI
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Patent number: 8486230Abstract: A belt (shoe press belt) for papermaking machines having good wet paper web water squeezing capability, and wherein damage, cracks, and abrasion of the outer circumferential belt surface during use is small, and due to the reduced abrasion between the cutting chips, the cutter and the groove walls, the cutter life is long and the surface roughness is small. The cross-section in the cross-machine direction of the water draining grooves is provided in the machine direction in the felt-side surface of the shoe press belt and the groove corner parts formed by the groove sidewalls and the groove bottom part of the water draining grooves are chamfered in the shape of a trapezoid or a rectangle.Type: GrantFiled: April 9, 2010Date of Patent: July 16, 2013Assignee: Ichikawa Co., Ltd.Inventors: Hideo Inoue, Tomoyuki Kawamata
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Patent number: 8480858Abstract: The invention relates to an arrangement in connection with the press section of a web-forming machine. The arrangement includes at least one press nip for dewatering the web manufactured on a web-forming machine. The arrangement also includes a smoothing press including a smoothing roll arranged after the press nip. The smoothing press includes smooth heat carrying devices arranged as a loop around at least two guide rolls. The smoothing roll is arranged into contact with the devices between two guide rolls. The smoothing roll and/or at least one of the guide rolls is a steam heated drying cylinder or a steam heated roll modified thereof. The invention also relates to a board or paper produced in such arrangement.Type: GrantFiled: September 21, 2012Date of Patent: July 9, 2013Assignees: Stora Enso Oyj, Metso Paper, Inc.Inventors: Pekka Kylliainen, Kari Raisanen
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Patent number: 8449723Abstract: A shoe press belt includes a substrate, a wet paper web-side layer provided on the outer side of the substrate; and a shoe-side layer on the inner side; the wet paper web-side layer and the shoe-side layer are made from a high-polymer elastic material. The surface layer of the wet paper web-side layer includes concave water catching parts and land parts which are projecting parts occurring due to formation of the water catching parts. The occurrence of cracks in the surface part of the land part and the bottom part and corner parts of the water catching part of the shoe press belt is suppressed by setting the hardness of the surface part of the land part at a relatively higher value than the hardness of the bottom part of the water catching part. Thereby, occurrence of cracks in the surface part of the land parts and the bottom part of the water catching part in a shoe press belt having water catching parts and land parts in the surface layer of the wet paper web-side layer can be suppressed.Type: GrantFiled: February 25, 2010Date of Patent: May 28, 2013Assignee: Ichikawa Co., Ltd.Inventor: Shintaro Yamazaki
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Patent number: 8394239Abstract: An industrial fabric, belt or sleeve and a method of making the fabric, belt or sleeve are disclosed. The industrial fabric, belt or sleeve is produced by spirally winding strips of polymeric material, such as an industrial strapping or ribbon material, and joining the adjoining sides of the strips of material using ultrasonic welding or laser welding techniques. The fabric, belt or sleeve may then be perforated using a suitable technique to make it permeable to air and/or water.Type: GrantFiled: December 10, 2009Date of Patent: March 12, 2013Assignee: Albany International Corp.Inventors: Dana Eagles, Jonas Karlsson, Bruce Stowe, Joseph Botelho, Sabri Mourad, Jerry O'Connor, Jon Montcrieff, Robert Hansen
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Patent number: 8349138Abstract: A process and apparatus for treating a pulp web (9) in a paper or board machine in a pressing unit (29) with one press roll (24) that has a rotating press shell (25) and one opposing roll (23), where the pulp web (9) is dewatered in an extended press nip (26) between the opposing roll (23) and the pressing shell (25) of the press roll (24). The pulp web (9) is carried on the rotating pressing shell (25) of the press roll (24) to a transfer zone (30), where the pulp web (9) is passed from the pressing shell (25) onto a transfer element (31, 27) after leaving the extended press nip (26).Type: GrantFiled: May 18, 2010Date of Patent: January 8, 2013Assignee: Andritz AGInventors: Wilhelm Mausser, Andreas Anzel, Harald Weigant, David V. Lange
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Patent number: 8303776Abstract: The invention relates to a shoe press belt comprising an elastomer polymer having nanoparticles attached therewith through covalent bonds.Type: GrantFiled: July 3, 2008Date of Patent: November 6, 2012Assignee: Tamfelt PMC OyInventor: Ville Lahdensuo
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Patent number: 8282782Abstract: A wet paper web transfer belt (1) has a wet paper web-side layer (31) including a resin and a hydrophilic fibrous body (30) and a machine-side layer (32). A basic fabric (33) disposed in the belt comprises a first woven fabric (34) disposed on a wet paper web (W) side and a second woven fabric (35) disposed on a press roll (10) side. The first woven fabric (34) and the second woven fabric (35) are stacked together. At least a portion of the hydrophilic fibrous body (30) is exposed on a surface (37) of the wet paper web-side layer (31). The basis weight of the first woven fabric (34) is greater than the basis weight of the second woven fabric (35). The structure is effective to improve a first function to cause the wet paper web (W) to stick thereon and to transfer the wet paper web (W), and a second function to allow the wet paper web (W) to be smoothly released from the belt for transferring the wet paper web (W) to a next process.Type: GrantFiled: January 31, 2008Date of Patent: October 9, 2012Assignee: Ichikawa Co., Ltd.Inventors: Takeshi Sawada, Kenji Inoue
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Patent number: 8282784Abstract: Provided is a paper-making machine belt (or a paper-making shoe-press belt), which is excellent in a wet-web water-squeezing property, which is stable in a paper quality (e.g., wet-web smoothness or marking property), and which has little damage (e.g., cracking or wear) of the outer circumference of the belt being used. The paper-making shoe-press belt carries a felt for accepting the squeezed water from the wet-web and has draining grooves extended in the felt-side surface. The paper-making shoe-press belt is characterized in that the draining grooves extended in the felt-side surface have at least two kinds of different groove shapes in the transverse direction (or the CMD direction) of the paper-making machine. The groove shape enables the grooves of two continuous and discontinuous kinds to share the functions thereby to satisfy the improvements in the drainage and in the paper quality and the wet-web surface smoothness at the same time.Type: GrantFiled: March 14, 2008Date of Patent: October 9, 2012Assignee: Ichikawa Co., Ltd.Inventors: Satoshi Takano, Hiroyuki Takamura
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Patent number: 8236140Abstract: A belt press for a paper machine, the belt press including a roll having an exterior surface and a permeable belt. The permeable belt including a first side being guided over a portion of the exterior surface of the roll. The permeable belt having a tension of at least approximately 30 kN/m. The first side of the belt having an open area of at least approximately 25% and a contact area of at least approximately 10%. A web travels between the permeable belt and the exterior surface of the roll.Type: GrantFiled: March 25, 2010Date of Patent: August 7, 2012Assignee: Voith Patent GmbHInventors: Thomas ThorĂśe Scherb, Hubert Walkenhaus, Jeffrey Herman, Luiz Carlos Silva
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Patent number: 8192585Abstract: A press belt 20 includes a multiplicity of drain grooves 21 extending along a belt travel direction, lands 22 located between adjacent drain grooves 21, and auxiliary grooves 23 located on the lands 22 and extending along the belt travel direction. A transverse sectional area of each auxiliary groove 23 is smaller than that of each drain groove 21.Type: GrantFiled: December 12, 2007Date of Patent: June 5, 2012Assignee: Yamauchi CorporationInventors: Keiji Nakagawa, Tetsuya Murakami
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Patent number: 8192583Abstract: A process belt for papermaking with a long operational life including an integrated structure of a reinforcing fibrous base material and a polyurethane layer is disclosed. The reinforcing fibrous base material is embedded in the polyurethane and the outer peripheral surface and the inner peripheral surface are made of the polyurethane. Nanoparticles including, as a main component, a silicon oxide component, the surface of which is treated with an organic silane coupling agent, are homogeneously dispersed in one part or all of the polyurethane.Type: GrantFiled: February 18, 2011Date of Patent: June 5, 2012Assignee: Ichikawa Co., Ltd.Inventors: Takao Yazaki, Atsushi Ishino, Kenji Inoue, Ai Tamura
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Patent number: 8192584Abstract: A papermaking belt 10 includes: a base material layer 11 including longitudinal and lateral yarns; a back-surface-side resin layer 12 which is provided on a back surface side of the base material layer, and at least a part of which has impregnated into the base material layer from the back surface side of the base material layer; a first resin layer 13 which has a relatively low viscosity, and has impregnated into the base material layer 11 from a front surface side of the base material layer 11; and a second resin layer 14 which contains chopped fibers 15 in a dispersed state, has a higher viscosity than that of the first resin layer 13, and is provided on a front surface side of the first resin layer 13.Type: GrantFiled: December 12, 2007Date of Patent: June 5, 2012Assignee: Yamauchi CorporationInventor: Tetsuya Murakami
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Publication number: 20120103550Abstract: An apparatus for transferring a wet paper web from a press nip to a drying cylinder of a papermaking machine, and for structuring the web, includes an impermeable transfer belt that passes through the press nip along with the paper web, and a permeable structuring fabric for transfer of the web onto the drying cylinder, the structuring fabric being arranged in a loop within which a suction transfer device is disposed. A web-contacting surface of the belt has a non-uniform distribution of microscopic-scale depressions, and a suction zone of the transfer device includes a transfer point spaced a distance D from the press nip. The belt is arranged to bring the web into contact with the structuring fabric in the suction zone for a length L, such that suction is exerted on the paper web to transfer the paper web from the belt onto the structuring fabric at the transfer point.Type: ApplicationFiled: November 4, 2011Publication date: May 3, 2012Inventors: Paul Douglas Beuther, Frank Stephen Hada, Jeffrey Dean Holz, Hans Ivarsson, Ingvar Berndt Erik Klerelid, Johan Ulf Ragard
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Publication number: 20120090801Abstract: Calender (1) for calendering a paper or board web (2), having at least one nip (3), which is formed between a heatable roll (4) and a mating element (5), a device (6) for producing a predetermined pressure in the nip (3), and a web treatment device (7) arranged upstream of the nip (3) and having two contact surfaces (9, 10) forming a treatment nip (8), one of which is a circulating contact surface (9) which is formed by a belt (14) circulating on guide rolls (11, 12, 13), the other contact surface (10) is formed by the circulating surface of the heatable roll (4), and the treatment nip (8) extends along an angle (15) of the wrap of the heatable roll (4), wherein, in order to increase the thermal efficiency of the transfer of heat, the circulating belt (14) uses a resilient surface to press the paper or board web (2) onto the heatable roll (4), and the guide rolls (11, 12, 13) control sectional forces of the circulating belt (14) in the treatment nip (8).Type: ApplicationFiled: June 25, 2010Publication date: April 19, 2012Applicant: Andritz Kusters GmbHInventors: Peter Svenka, Bernhard Brendel, Eduard Davydenko
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Patent number: 8137507Abstract: A shoe press belt for paper-making machine that reduces belt damages attributed to the friction between belt and shoe. The shoe press belt for paper-making machine having a wet paper contact surface and a shoe contact surface, is characterized in that the shoe press belt for paper-making machine has a base member and at least a polymer elastic part constituting the shoe contact surface and that the shoe contact surface of the polymer elastic part has a surface roughness (Ra) of 1.0 to 3.5 ?m.Type: GrantFiled: June 24, 2008Date of Patent: March 20, 2012Assignee: Ichikawa Co., Ltd.Inventors: Atsushi Ishino, Nobuharu Suzuki, Shintaro Yamazaki, Takeshi Sawada, Tomoyuki Kawamata
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Publication number: 20120055644Abstract: The invention relates to an apparatus and a method for treating a fibrous material web (9) in a paper or cardboard machine in a long nip press unit (29) comprising a press roll (24), which has a rotating press jacket (25) and a mating roll (23), wherein the fibrous material web (9) is dewatered in an extended press nip (26) between the mating roll (23) and the press jacket (25) of the press roll (24). According to the invention, the fibrous material web (9) is guided after the extended press nip (26) on a special rotating press jacket (25) of the press roll (24) to a transfer region (30), in which the fibrous material web (9) is transferred from the press jacket (25) to a transfer element (31, 27).Type: ApplicationFiled: April 9, 2010Publication date: March 8, 2012Inventors: Wilhelm Mausser, Andreas Anzel
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Publication number: 20120012270Abstract: A belt (shoe press belt) for papermaking machines having good wet paper web water squeezing capability, and wherein damage, cracks, and abrasion of the outer circumferential belt surface during use is small, and due to the reduced abrasion between the cutting chips, the cutter and the groove walls, the cutter life is long and the surface roughness is small. The cross-section in the cross-machine direction of the water draining grooves is provided in the machine direction in the felt-side surface of the shoe press belt and the groove corner parts formed by the groove sidewalls and the groove bottom part of the water draining grooves are chamfered in the shape of a trapezoid or a rectangle.Type: ApplicationFiled: April 9, 2010Publication date: January 19, 2012Applicant: Ichikawa Co., Ltd.Inventors: Hideo Inoue, Tomoyuki Kawamata
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Patent number: 8092654Abstract: A process belt for papermaking with a long operational life comprises an integrated structure of a reinforcing fibrous base material 6 and a polyurethane layer, the reinforcing fibrous base material being embedded in the polyurethane, wherein an inorganic filler selected from calcined kaolin clay, fused silica and zeolite is homogeneously dispersed in the polyurethane.Type: GrantFiled: November 26, 2010Date of Patent: January 10, 2012Assignee: Ichikawa Co., Ltd.Inventors: Takao Yazaki, Atsushi Ishino, Kenji Inoue, Ai Tamura
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Publication number: 20120000622Abstract: A belt conditioning method, apparatus and paper machine employing the method and apparatus are provided. The belt method and apparatus include multiple conditioning devices using chemicals to condition water impermeable surfaces of paper machine belts, such as transfer belts and prevent deposits from accumulating on the belts. In one embodiment, the belt supports a web at a first portion of the belt's loop and is separated from the web at a second portion. The conditioning apparatuses are placed in the second portion.Type: ApplicationFiled: September 21, 2010Publication date: January 5, 2012Inventors: David I. Weinstein, Peter E. Perry, James P. Rivard, Pawel Cirocki
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Patent number: 8083899Abstract: A belt (4) for a shoe press is disposed for rotational movement between a press roll (2) and a shoe (3). The belt (4) includes a shoe-side layer (21), a base layer (22) disposed on an outer circumferential surface of the shoe-side layer (21), and a wet paper web-side layer (25) disposed on an outer circumferential surface of the base layer (22). The base layer (22) has a pair of reinforcing bases (11). The reinforcing layers (11) are disposed circumferentially in a warpwise direction in given regions (E1) corresponding respectively to shoe edges (10) on the opposite sides in a widthwise direction of the shoe (3). The rigidity of belt portions of shoe edge abutment regions (E1) on opposite sides in the widthwise direction of the shoe (3) is partially increased to increase bending stresses and crack resistance of the belt.Type: GrantFiled: June 4, 2007Date of Patent: December 27, 2011Assignee: Ichikawa Co., Ltd.Inventor: Tomoyuki Kawamata
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Patent number: 8080137Abstract: A belt for use in a long nip press having an arcuate pressure shoe. The belt has at least one layer having a polymer resin coating on at least one surface thereof. The resin coating has a plurality of grooves arranged therein and wherein a number of the grooves has a length less than a length of the arcuate pressure shoe to reduce ingoing nip spray.Type: GrantFiled: May 27, 2008Date of Patent: December 20, 2011Assignee: Albany International Corp.Inventors: Keith Fitzpatrick, Bo-Christer Aberg, Michael G. Moriarty, Paul Turner
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Publication number: 20110303383Abstract: A shoe press belt includes a substrate, a wet paper web-side layer provided on the outer side of the substrate; and a shoe-side layer on the inner side; the wet paper web-side layer and the shoe-side layer are made from a high-polymer elastic material. The surface layer of the wet paper web-side layer includes concave water catching parts and land parts which are projecting parts occurring due to formation of the water catching parts. The occurrence of cracks in the surface part of the land part and the bottom part and corner parts of the water catching part of the shoe press belt is suppressed by setting the hardness of the surface part of the land part at a relatively higher value than the hardness of the bottom part of the water catching part. Thereby, occurrence of cracks in the surface part of the land parts and the bottom part of the water catching part in a shoe press belt having water catching parts and land parts in the surface layer of the wet paper web-side layer can be suppressed.Type: ApplicationFiled: February 25, 2010Publication date: December 15, 2011Applicant: ICHIKAWA CO., LTD.Inventor: Shintaro Yamazaki
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Patent number: 8034216Abstract: The invention relates to a roll cover for treating a paper, cardboard, tissue or other fibrous web in a machine for manufacturing and/or converting them, comprising one or more plastic layers, of which at least one is of compressible configuration, and at least one carrier element in the form of a woven fabric, laid scrim or the like. Here, the loading of the support structure is intended to be reduced by at least one carrier element being embedded into a compressible plastic layer.Type: GrantFiled: November 8, 2006Date of Patent: October 11, 2011Assignee: Voith Patent GmbHInventor: Uwe Matuschczyk
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Patent number: 8012055Abstract: The invention relates to a press belt (1) made from an elastomer material and forming a closed loop, the belt having an inner surface (2) and an outer surface (3) and three layers of reinforcement yarns (7?, 5?, 6?) arranged inside the elastomer material. In the invention, an outermost yarn layer (7) is formed by longitudinal and transversely adjacent reinforcement yarns (7?) of the press belt (1), which absorb energy and are restored from deformation with delay in connection with deformation.Type: GrantFiled: February 2, 2005Date of Patent: September 6, 2011Assignee: Tamfelt PMC OyInventors: Satu Hagfors, Olli Jermo, Marita A. Leppimaki, legal representative
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Publication number: 20110203758Abstract: A process belt for papermaking with a long operational life comprises an integrated structure of a reinforcing fibrous base material 6 and a polyurethane layer. The reinforcing fibrous base material is embedded in the polyurethane and the outer peripheral surface 21 and the inner peripheral surface 22 are made of the polyurethane. Nanoparticles comprising, as main component, a silicon oxide component, the surface of which is treated with an organic silane coupling agent, are homogeneously dispersed in one part or all of the polyurethane.Type: ApplicationFiled: February 18, 2011Publication date: August 25, 2011Applicant: ICHIKAWA CO., LTD.Inventors: Takao Yazaki, Atsushi Ishino, Kenji Inoue, Ai Tamura
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Publication number: 20110180223Abstract: A tissue papermaking machine is described, comprising a wet section (2) and a press section (3) comprising a single press (11) with first and second press elements (12, 13) forming a press nip (N1), and with a press felt (17) running through the press nip in contact with the formed fibre web (1?), whereby the second press element is arranged inside the loop of the press M felt, and a smooth belt (14) runs through the press nip in contact with the formed fibre web, whereby the first press element is arranged inside the loop of the belt, and a transfer roll (16) arranged inside the loop of the belt forming a transfer nip (N2) with a drying surface (20), whereby the smooth belt carries the fibre web between the press nip and the transfer nip. Furthermore, the machine has a dry section (4) for final drying of the fibre web (1?).Type: ApplicationFiled: September 16, 2009Publication date: July 28, 2011Inventors: Ingvar Klerelid, Ola Thomasson
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Patent number: 7955475Abstract: A papermaking shoe press belt is formed of a reinforcing fiber base material and a polyurethane layer integrated with each other. The reinforcing fiber base material is embedded in the polyurethane layer. The papermaking shoe press belt includes, as the polyurethane layer, a polyurethane layer obtainable by curing a composition composed in combination of a urethane prepolymer and one or more curing agent. The urethane prepolymer is obtainable by reacting a p-phenylene diisocyanate compound with a long-chain polyol.Type: GrantFiled: March 5, 2010Date of Patent: June 7, 2011Assignee: Ichikawa Co., Ltd.Inventors: Takao Yazaki, Shintaro Yamazaki, Yuya Takamori
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Patent number: 7951269Abstract: System for drying a tissue or hygiene web. The system includes a permeable structured fabric carrying the web over a drying apparatus. A permeable dewatering fabric contacts the web and is guided over the drying apparatus. A mechanism is used to apply pressure to the permeable structured fabric, the web, and the permeable dewatering fabric at the drying apparatus. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.Type: GrantFiled: September 28, 2007Date of Patent: May 31, 2011Assignee: Voith Patent GmbHInventors: Jeffrey Herman, Thomas Thoroee Scherb, Luiz Carlos Silva, Hubert Walkenhaus
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Patent number: 7947154Abstract: A belt for papermaking shoe press is provided which comprises a reinforcing fibrous base (6) and a polyurethane layer (2) united therewith, the reinforcing fibrous base (6) having been embedded in the polyurethane layer (2). The belt includes a polyurethane layer obtained by curing a mixture comprising: a urethane prepolymer obtained by reacting a polyisocyanate compound selected among p-phenylene-diisocyanate, 4,4?-methylene-bis(phenyl isocyanate), and tolylene-diisocyanate with a polyol compound selected among polypropylene glycol, polytetramethylene glycol, and a polycarbonate diol; a hardener selected among an aliphatic diol compound, hydroquinone-bis-?-hydroxyethyl ether, and organic polyamine compound; and an aliphatic triol compound. Due to this layer, the shoe press belt for papermaking is excellent in wearing resistance and flexing fatigue resistance.Type: GrantFiled: February 4, 2009Date of Patent: May 24, 2011Assignee: Ichikawa Co., Ltd.Inventors: Takao Yazaki, Nobuharu Suzuki, Shintaro Yamazaki, Atsushi Ishino, Yuya Takamori, Ryo Umehara, Ai Tamura