Patents by Inventor Ai Tamura
Ai Tamura 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: 9920477Abstract: The object of the present invention is to reduce the wear of the doctor blade applied to the wet paper web transfer belt and the wear of the guide rolls supporting the wet paper web transfer belt while maintaining the wear resistance of the wet paper web contacting surface and the machine contacting surface of the wet paper web transfer belt together with the adhesive and releasing properties of the wet paper web on the wet paper web contacting surface of conventional wet paper web transfer belts. This is achieved by a wet paper web transfer belt in which a polyurethane is integrated with a reinforcing base material comprising a wet paper web-side surface and a machine-side surface, at least the wet paper web-side surface of the reinforcing base material is embedded in the polyurethane, an outer circumferential layer comprising a wet paper web contacting surface is constituted by some of the polyurethane; wherein, at least the outer circumferential layer comprises a spherical filler.Type: GrantFiled: January 29, 2015Date of Patent: March 20, 2018Assignee: Ichikawa Co., Ltd.Inventors: Kenji Inoue, Ryo Umehara, Ai Tamura, Yuta Sugawara
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Patent number: 9771683Abstract: The object of the present invention is to provide a wet paper web transfer belt wherein the adhesive properties and releasing properties of the wet paper web with the wet paper web contacting surface of conventional wet paper web transfer belts have been further improved and paper robbing and floating edges do not occur. This is achieved by a wet paper web transfer belt in which a polyurethane is integrated with a reinforcing base material comprising a wet paper web-side surface and a machine-side surface, at least the wet paper web-side surface of the reinforcing base material is embedded in the polyurethane, an outer circumferential layer comprising a wet paper web contacting surface is constituted by some of the polyurethane; wherein, at least the outer circumferential layer comprises two different types of fillers including a high-roundness filler with a relatively high roundness and a low-roundness filler with a relatively low roundness.Type: GrantFiled: January 29, 2015Date of Patent: September 26, 2017Assignee: Ichikawa Co., Ltd.Inventors: Kenji Inoue, Ryo Umehara, Ai Tamura, Yuta Sugawara
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Patent number: 9725850Abstract: A wet paper web transfer belt for transferring a wet paper web. The belt has a wet paper web carrying surface carrying a wet paper web which is made of a resin layer. The skewness Rsk of the roughness curve of the wet paper web carrying surface is ?0.5 or less.Type: GrantFiled: September 9, 2015Date of Patent: August 8, 2017Assignee: Ichikawa Co., Ltd.Inventor: Ai Tamura
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Patent number: 9683330Abstract: There is provided a wet paper web transfer belt for transferring a wet paper web, comprising: a wet paper web carrying side resin layer having a wet paper web carrying surface for carrying the wet paper web; and a roll side resin layer having a roll contacting surface. A water swelling rate of a resin material constituting the wet paper web carrying side resin layer and a water swelling rate of a resin material constituting the roll side resin layer are different, and the water swelling rate of the resin material constituting the wet paper web carrying side resin layer is 2.0% or more and the water swelling rate of the resin material constituting the roll side resin layer is 10.0% or less.Type: GrantFiled: May 18, 2016Date of Patent: June 20, 2017Assignee: Ichikawa Co., LtdInventors: Kenji Inoue, Ryo Umehara, Ai Tamura, Yuta Sugawara, Tomoyo Ogishima
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Publication number: 20160348311Abstract: There is provided a wet paper web transfer belt for transferring a wet paper web, comprising: a wet paper web carrying side resin layer having a wet paper web carrying surface for carrying the wet paper web; and a roll side resin layer having a roll contacting surface. A water swelling rate of a resin material constituting the wet paper web carrying side resin layer and a water swelling rate of a resin material constituting the roll side resin layer are different, and the water swelling rate of the resin material constituting the wet paper web carrying side resin layer is 2.0% or more and the water swelling rate of the resin material constituting the roll side resin layer is 10.0% or less.Type: ApplicationFiled: May 18, 2016Publication date: December 1, 2016Applicant: ICHIKAWA CO., LTD.Inventors: KENJI INOUE, RYO UMEHARA, AI TAMURA, YUTA SUGAWARA, TOMOYO OGISHIMA
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Publication number: 20160097159Abstract: The object of the present invention is to provide a wet paper web transfer belt having excellent wet paper web transfer properties wherein the paper robbing phenomenon in the press part is prevented, a papermaking system having excellent operational stability comprising said wet paper web transfer belt, a papermaking method having excellent operational stability using said wet paper web transfer belt, and a method for producing said wet paper web transfer belt. This is achieved by a wet paper web transfer belt 1 for transferring a wet paper web; wherein it comprises a wet paper web carrying surface 221 carrying a wet paper web W, which is made of a resin layer 22, and wherein the skewness Rsk of the roughness curve of the wet paper web carrying surface 221 is ?0.5 or less.Type: ApplicationFiled: September 9, 2015Publication date: April 7, 2016Applicant: Ichikawa Co., Ltd.Inventor: Ai TAMURA
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Patent number: 9157185Abstract: A wet paper web transfer belt for transferring a wet paper web includes a wet paper web contacting surface for carrying the wet paper web. The wet paper web contacting surface is constituted by a resin layer. The wet paper web contacting surface includes, in the width direction, sheet edge regions for carrying the edge parts of the wet paper web and a center region for carrying the center vicinity of the wet paper web. The arithmetic average roughness Ra1 (?m) of the wet paper web contacting surface in the sheet edge regions is smaller than the arithmetic average roughness Ra2 (?m) of the wet paper web contacting surface in the center region, and prescribed roughness related equations are fulfilled.Type: GrantFiled: September 20, 2013Date of Patent: October 13, 2015Assignee: ICHIKAWA CO., LTD.Inventors: Kenji Inoue, Masatoshi Kono, Ryo Umehara, Ai Tamura, Toshihiro Tsuji
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Patent number: 9145643Abstract: A wet paper web transfer belt for transferring a wet paper web includes a wet paper web contacting surface for carrying the wet paper web. The wet paper web contacting surface is constituted by a resin layer, and the wet paper web contacting surface includes a wet paper web carrying region for carrying the wet paper web. A prescribed relation of the swelling rate in water of the resin layer and the surface roughness of the wet paper web contacting surface is fulfilled in accordance with the basis weight of the base paper of the wet paper web.Type: GrantFiled: September 20, 2013Date of Patent: September 29, 2015Assignee: ICHIKAWA CO., LTD.Inventors: Kenji Inoue, Masatoshi Kono, Ryo Umehara, Ai Tamura, Toshihiro Tsuji
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Publication number: 20150218752Abstract: The object of the present invention is to provide a wet paper web transfer belt wherein the adhesive properties and releasing properties of the wet paper web with the wet paper web contacting surface of conventional wet paper web transfer belts have been further improved and paper robbing and floating edges do not occur. This is achieved by a wet paper web transfer belt in which a polyurethane is integrated with a reinforcing base material comprising a wet paper web-side surface and a machine-side surface, at least the wet paper web-side surface of the reinforcing base material is embedded in the polyurethane, an outer circumferential layer comprising a wet paper web contacting surface is constituted by some of the polyurethane; wherein, at least the outer circumferential layer comprises two different types of fillers including a high-roundness filler with a relatively high roundness and a low-roundness filler with a relatively low roundness.Type: ApplicationFiled: January 29, 2015Publication date: August 6, 2015Applicant: Ichikawa Co., Ltd.Inventors: Kenji INOUE, Ryo Umehara, Ai Tamura, Yuta Sugawara
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Publication number: 20150218751Abstract: The object of the present invention is to reduce the wear of the doctor blade applied to the wet paper web transfer belt and the wear of the guide rolls supporting the wet paper web transfer belt while maintaining the wear resistance of the wet paper web contacting surface and the machine contacting surface of the wet paper web transfer belt together with the adhesive and releasing properties of the wet paper web on the wet paper web contacting surface of conventional wet paper web transfer belts. This is achieved by a wet paper web transfer belt in which a polyurethane is integrated with a reinforcing base material comprising a wet paper web-side surface and a machine-side surface, at least the wet paper web-side surface of the reinforcing base material is embedded in the polyurethane, an outer circumferential layer comprising a wet paper web contacting surface is constituted by some of the polyurethane; wherein, at least the outer circumferential layer comprises a spherical filler.Type: ApplicationFiled: January 29, 2015Publication date: August 6, 2015Applicant: Ichikawa Co., Ltd.Inventors: Kenji INOUE, Ryo UMEHARA, Ai TAMURA, Yuta SUGAWARA
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Patent number: 8709214Abstract: Provided is a belt for transferring a wet web, wherein any water mark does not appear on made paper even when a rate of feeding the belt for transferring a wet web by a roll is high. The roll side layer surface of the belt for transferring a wet web has the surface structure in which the percentage of a contact area with the roll per unit area is 10% to 75% and a surface roughness Ra is 50-150 ?m.Type: GrantFiled: October 12, 2012Date of Patent: April 29, 2014Assignee: Ichikawa Co., Ltd.Inventors: Kenji Inoue, Ryo Umehara, Ai Tamura, Toshihiro Tsuji
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Publication number: 20140076511Abstract: A wet paper web transfer belt for transferring a wet paper web includes a wet paper web contacting surface for carrying the wet paper web. The wet paper web contacting surface is constituted by a resin layer. The wet paper web contacting surface includes, in the width direction, sheet edge regions for carrying the edge parts of the wet paper web and a center region for carrying the center vicinity of the wet paper web. The arithmetic average roughness Ra1 (?m) of the wet paper web contacting surface in the sheet edge regions is smaller than the arithmetic average roughness Ra2 (?m) of the wet paper web contacting surface in the center region, and prescribed roughness related equations are fulfilled.Type: ApplicationFiled: September 20, 2013Publication date: March 20, 2014Applicant: Ichikawa Co., Ltd.Inventors: Kenji INOUE, Masatoshi Kono, Ryo Umehara, Ai Tamura, Toshihiro Tsuji
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Publication number: 20140076510Abstract: A wet paper web transfer belt for transferring a wet paper web includes a wet paper web contacting surface for carrying the wet paper web. The wet paper web contacting surface is constituted by a resin layer, and the wet paper web contacting surface includes a wet paper web carrying region for carrying the wet paper web. A prescribed relation of the swelling rate in water of the resin layer and the surface roughness of the wet paper web contacting surface is fulfilled in accordance with the basis weight of the base paper of the wet paper web.Type: ApplicationFiled: September 20, 2013Publication date: March 20, 2014Applicant: Ichikawa Co., Ltd.Inventors: Kenji INOUE, Masatoshi KONO, Ryo UMEHARA, Ai TAMURA, Toshihiro TSUJI
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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: 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: 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: 20110127000Abstract: 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: ApplicationFiled: November 26, 2010Publication date: June 2, 2011Applicant: ICHIKAWA CO., LTD.Inventors: Takao Yazaki, Atsushi Ishino, Kenji Inoue, Ai Tamura
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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
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Publication number: 20100314067Abstract: 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: ApplicationFiled: February 4, 2009Publication date: December 16, 2010Applicant: ICHIKAWA CO., LTD.Inventors: Takao Yazaki, Nobuharu Suzuki, Shintaro Yamazaki, Atsushi Ishino, Yuya Takamori, Ryo Umehara, Ai Tamura