Patents Assigned to Awa Paper Mfg. Co., Ltd.
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Patent number: 10080995Abstract: A membrane support material is support material for adhering a membrane to a membrane attachment surface. A plurality of non-woven fiber sheets, which are three-dimensional fiber aggregates, are layered together and thermal and pressure processed to bond fibers of the non-woven fiber sheets and form a single sheet of support material. Each layer of non-woven fiber sheet has a different longitudinal-to-lateral tensile strength ratio (k), which is the ratio (f2/f1) of the tensile strength in the lengthwise direction (f2) to the tensile strength in the width direction (f1), and in the thermal and pressure processed state, the support material membrane attachment surface has curvature in the lateral (width) direction with an outward protruding (convex) center region.Type: GrantFiled: December 23, 2011Date of Patent: September 25, 2018Assignee: AWA PAPER MFG. CO., LTD.Inventors: Katsumi Osaka, Akihiro Okubo, Daisuke Fujieda
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Patent number: 9889393Abstract: A plurality of hollow filter sheets have a suction pipe inserted therethrough to be stacked with a ring-shaped packing clamped therebetween. Therefore, a gap between the hollow filter sheet and the suction pipe is watertightly sealed. In the hollow filter sheet, a hollow portion is provided between two filters, and then a spacer with a surface having pits and projections is provided in the hollow portion. A narrow passage space allowing liquid to pass through is provided between the filter and the spacer by pressing the two filters against surfaces of the spacer with the packings and causing the filters to be deformed into a shape according to the surfaces of the spacer. The narrow passage space is smaller than a drainage space between the filters and the spacer that are not clamped by the packings.Type: GrantFiled: January 14, 2011Date of Patent: February 13, 2018Assignee: AWA PAPER MFG. CO., LTD.Inventors: Koichi Nakagawa, Kosuke Tsuda
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Patent number: 8778183Abstract: A filtering apparatus that sucks liquid in hollow portions (10) of the filtering elements (1) via suction pipes (3) so that liquid passes the filtering elements and is filtered. Each suction pipe has suction holes (4) connected to the hollow portions. The suction pipes are inserted into through holes (2) of the filtering elements. The filtering elements are arranged side by side and connected to the suction pipes. A ring-shaped packing is interposed between the filtering elements, and water-tightly seals the clearance between the filtering element and the suction pipe. The through holes are arranged at peripheral locations of each filtering element. The suction pipes are inserted into the through holes of each filtering element. The filtering elements are held at the peripheral locations by the suction pipes.Type: GrantFiled: January 26, 2010Date of Patent: July 15, 2014Assignee: AWA Paper Mfg. Co., Ltd.Inventors: Koichi Nakagawa, Yoshifumi Kusaka, Daisuke Nii, Daisuke Fujieda
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Patent number: 7987996Abstract: A filter medium comprises a modified cross-section fiber (A) having a fiber diameter between 40 and 70 ?m, an extremely fine fiber (B) having a fiber diameter of more than 5 ?m and no more than 10 ?m and a modified cross-section fiber (C) having a fiber diameter between 15 and 30 ?m, the content of the extremely fine fiber (B) is between 3 and 10% by mass, and the content of the modified cross-section fiber (C) is between 5 and 15% by mass based on 100% by mass of total the fibers in the filter medium.Type: GrantFiled: June 9, 2008Date of Patent: August 2, 2011Assignees: Toyota Boshoku Kabushiki Kaisha, Awa Paper Mfg. Co., Ltd.Inventors: Yoshihiro Ohashi, Shin Bando, Masahumi Suzuki
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Publication number: 20080314821Abstract: A filter medium comprises a modified cross-section fiber (A) having a fiber diameter between 40 and 70 ?m, an extremely fine fiber (B) having a fiber diameter of more than 5 ?m and no more than 10 ?m and a modified cross-section fiber (C) having a fiber diameter between 15 and 30 ?m, the content of the extremely fine fiber (B) is between 3 and 10% by mass, and the content of the modified cross-section fiber (C) is between 5 and 15% by mass based on 100% by mass of total the fibers in the filter medium.Type: ApplicationFiled: June 9, 2008Publication date: December 25, 2008Applicants: TOYOTA BOSHOKU KABUSHIKI KAISHA, AWA PAPER MFG. CO., LTD.Inventors: Yoshihiro OHASHI, Shin BANDO, Masahumi SUZUKI
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Patent number: 7071130Abstract: Segregating membrane supporting material is a three-dimensional assembly of fibers thermo-compressed into non-woven fabric, and the non-woven fabric fibers are joined together in sheet form. This segregating membrane supporting material is non-woven fabric, including at least 10 weight % polyacrylonitrile-based synthetic fibers, which is thermo-compressed to give an overall bulk density 40% to 75% of the density of the fibers which make up the non-woven fabric.Type: GrantFiled: July 21, 2003Date of Patent: July 4, 2006Assignees: Awa Paper Mfg. Co., Ltd., Japan Exlan Company LimitedInventors: Yoshitsugu Hama, Hideo Naka, Yoshifumi Kusaka, Akihiro Okubo
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Patent number: 6937459Abstract: The present invention is mainly configured of a separator for an electric double-layer capacitor that comprises an aramid fiber, a polyester fiber, a glass fiber, and a silica (inorganic compound for forming hydrosol) containing a particulate silica (particulate inorganic compound) of not less than 1 nm and not more than 500 nm, wherein total of the silica and the glass fiber is not less than 10 mass percent and not more than 50 mass percent; the electric double-layer capacitor comprising the separator; and a manufacturing method of the separator for the electric double-layer capacitor which method comprises a mixing process for mixing the aramid fiber, the polyester fiber, the glass fiber, and the silica sol and a paper making process for making paper from the mixture.Type: GrantFiled: May 20, 2004Date of Patent: August 30, 2005Assignees: Mahle Tennex Corporation, Honda Motor Co., Ltd., AWA Paper Mfg. Co., Ltd.Inventors: Kouji Yamazaki, Mitsutoshi Suzuki, Kazuhiko Yanagi, Minoru Noguchi, Eisuke Komazawa, Hiroshi Nagao, Michio Matsuda
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Patent number: 6919026Abstract: A semipermeable membrane support includes, a non-woven fabric including main fiber and binder fiber, both of which are formed of synthetic resin fine fiber, the non-woven fabric being manufactured by heating and pressing after paper making, wherein the semipermeable membrane support has a ratio of a tensile strength in a paper feeding direction to that in a width direction of 2:1 to 1:1.Type: GrantFiled: September 20, 2001Date of Patent: July 19, 2005Assignees: Awa Paper Mfg. Co., Ltd., Nitto Denko CorporationInventors: Yoshitsugu Hama, Yoshifumi Kusaka, Akihiro Okubo
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Patent number: 6843819Abstract: There is provided an air filter, which has a long lifetime and permits to capture effectively carbon particles and reduce costs. The air filter has the first filter layer 11 impregnated with oil and the second filter layer 12, which is provided on the downstream side of the first filter layer 11 and serves as a lipophobic layer having an oil-repellent property. The filter material of the first filter layer 11 has a higher density than the filter material of the second filter material 12.Type: GrantFiled: May 21, 2001Date of Patent: January 18, 2005Assignees: Toyo Roki Seizo Kabushiki Kaisha, Awa Paper Mfg. Co., Ltd.Inventors: Atsushi Suzuki, Toshinori Oba, Norihiko Matsushita, Katsumi Suzuki, Takeo Jo
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Patent number: 6336947Abstract: The object of the present invention is to provide an air filter where the lifetime of the air filter is long and a carbon dust can be efficiently caught with keeping the cost low. The air filter of the present invention comprises a first filter layer 11 impregnated with oil; an oil repellent layer 11a disposed in the downstream side of the first filter layer 11, having the property of repelling the oil; and a second filter layer 12 disposed in the downstream side of the oil repellent layer 11a, impregnated with no oil. The transfer of the oil to the second filter layer 12 is controlled by the oil repellent layer 11a.Type: GrantFiled: May 1, 2000Date of Patent: January 8, 2002Assignees: Toyo Roki Seizo Kabushiki Kaisha, Awa Paper Mfg. Co., Ltd.Inventors: Yutaka Atsumi, Jun Suzuki, Takeo Jo, Katsumi Osaka