Patents by Inventor Takatoshi Mitsushima
Takatoshi Mitsushima 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: 10464003Abstract: There is provided a filter which includes a fiber layer and an adsorbent. The fiber layer includes fiber. The adsorbent is held in the fiber and adsorbs a chemical substance. The filter is divided into a plurality of sections by a fold. Each of the plurality of sections includes a first end portion positioned along the fold, a center portion adjacent to the first end portion, and a second end portion which counterposes the first end portion with the center portion interposed. The density of the adsorbent at the center portion is greater than the density of the adsorbent at the first end portion and at the second end portion.Type: GrantFiled: September 6, 2017Date of Patent: November 5, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Koji Motomura, Hiroto Sumida, Takahiko Murata, Takatoshi Mitsushima, Keiji Fujiwara
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Patent number: 10464285Abstract: A laminate includes a first sheet containing first fibers, a second sheet laminated on the first sheet and containing second fibers, and an adhesive disposed between the first sheet and the second sheet. At least a part of the adhesive is disposed in an end portion along the edge side of the laminate so as to form a linear first region, and the first sheet is adhered to the second sheet via the first region. Alternatively, a mass per unit area of the adhesive present in an end portion along an edge side of the laminate is larger than a mass per unit area of the adhesive present in a portion near a central part of the laminate rather than the end portion.Type: GrantFiled: December 9, 2016Date of Patent: November 5, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Kouji Ikeda, Koji Motomura, Takatoshi Mitsushima
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Patent number: 10232293Abstract: A fiber laminate includes a first fiber sheet containing first fibers, a second fiber sheet laminated on the first fiber sheet and containing second fibers, and an adhesive interposed between the first fiber sheet and the second fiber sheet. The adhesive is disposed to form a linear first region in the fiber laminate when viewed from a normal direction of a principal surface of the fiber laminate. The first fiber sheet and the second fiber sheet are adhered to each other via the first region. A gap is formed between the first fiber sheet and the second fiber sheet in a second region other than the first region.Type: GrantFiled: January 20, 2017Date of Patent: March 19, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Koji Motomura, Nobuhiro Nishizaki, Kouji Ikeda, Takahiko Murata, Takatoshi Mitsushima
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Patent number: 10220340Abstract: A laminated nonwoven fabric includes a first nonwoven fabric that comprises first fibers, and a second nonwoven fabric that comprises second fibers. The second nonwoven fabric is laminated on the first nonwoven fabric. An average fiber diameter D1 of the first fibers and an average fiber diameter D2 of the second fibers satisfy a relation of D1>D2. In viewed from a side of a principal surface of the second nonwoven fabric being not opposed to the first nonwoven fabric, a total area of first portions of the second fibers superimposed on the first fibers and existing on the nearer side than the first fibers is larger than a total area of second portions of the second fibers existing and superimposed on voids S of the first nonwoven fabric formed of the first fibers.Type: GrantFiled: September 30, 2015Date of Patent: March 5, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Koji Motomura, Takahiko Murata, Hiroto Sumida, Takahiro Kurokawa, Takatoshi Mitsushima
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Patent number: 10195556Abstract: A laminated nonwoven fabric includes a first nonwoven fabric containing first fibers, a second nonwoven fabric containing second fibers, a third nonwoven fabric containing third fibers, and an adhesive. The second nonwoven fabric is laminated on the first nonwoven fabric, and the third nonwoven fabric is laminated on the second nonwoven fabric on an opposite side with respect to the first nonwoven fabric. The adhesive is disposed between the first nonwoven fabric and the third nonwoven fabric. An average fiber diameter of the second fibers is equal to or less than 3 ?m, and is smaller than an average fiber diameter of the first fibers. The third nonwoven fabric has a protrusion including a part of the third fibers entangled with each other on a surface facing the second nonwoven fabric. At least a part of the adhesive is disposed between the protrusion and the first nonwoven fabric.Type: GrantFiled: June 23, 2016Date of Patent: February 5, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Koji Motomura, Takahiko Murata, Hiroto Sumida, Takatoshi Mitsushima, Keiji Fujiwara
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Patent number: 10174441Abstract: A laminated nonwoven fabric (NF) includes a first NF containing first fibers and a second NF containing second fibers and laminated on the first NF, and has a cut-off edge at an end thereof. An average diameter of the first fibers is larger than that of the second fibers not more than 3 ?m. 50% by mass to 70% by mass, inclusive, of the second fibers satisfy x?y, and 5% by mass to 30% by mass, inclusive, thereof satisfy x<y/2. “x” is a vector component in a direction (X axis direction) of the cut-off edge, and “y” is a vector component in Y axis direction perpendicular to X axis and parallel to a principal surface of the laminated NF. When the second NF is viewed from Z axis direction perpendicular to X and Y axes, at least some of the second fibers satisfying x<y/2 overlap the second fibers satisfying x?y.Type: GrantFiled: June 10, 2016Date of Patent: January 8, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Taichi Nakamura, Takayoshi Yamaguchi, Hiroto Sumida, Takahiro Kurokawa, Takatoshi Mitsushima
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Patent number: 10173158Abstract: A laminated nonwoven fabric includes a first nonwoven fabric and a second nonwoven fabric. The first nonwoven fabric contains charged first fibers. The second nonwoven fabric contains second fibers, and is laminated on the first nonwoven fabric. A fiber diameter of the first fibers is larger than a fiber diameter of the second fibers.Type: GrantFiled: May 27, 2016Date of Patent: January 8, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Koji Motomura, Hiroto Sumida, Takahiro Kurokawa, Taichi Nakamura, Takayoshi Yamaguchi, Takatoshi Mitsushima
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Publication number: 20180093214Abstract: There is provided a filter which includes a fiber layer and an adsorbent. The fiber layer includes fiber. The adsorbent is held in the fiber and adsorbs a chemical substance. The filter is divided into a plurality of sections by a fold. Each of the plurality of sections includes a first end portion positioned along the fold, a center portion adjacent to the first end portion, and a second end portion which counterposes the first end portion with the center portion interposed. The density of the adsorbent at the center portion is greater than the density of the adsorbent at the first end portion and at the second end portion.Type: ApplicationFiled: September 6, 2017Publication date: April 5, 2018Inventors: KOJI MOTOMURA, HIROTO SUMIDA, TAKAHIKO MURATA, TAKATOSHI MITSUSHIMA, KEIJI FUJIWARA
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Publication number: 20170252685Abstract: A fiber laminate includes a first fiber sheet containing first fibers, a second fiber sheet laminated on the first fiber sheet and containing second fibers, and an adhesive interposed between the first fiber sheet and the second fiber sheet. The adhesive is disposed to form a linear first region in the fiber laminate when viewed from a normal direction of a principal surface of the fiber laminate. The first fiber sheet and the second fiber sheet are adhered to each other via the first region. A gap is formed between the first fiber sheet and the second fiber sheet in a second region other than the first region.Type: ApplicationFiled: January 20, 2017Publication date: September 7, 2017Inventors: Koji Motomura, Nobuhiro Nishizaki, Kouji Ikeda, Takahiko Murata, Takatoshi Mitsushima
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Publication number: 20170217124Abstract: A laminate includes a first sheet containing first fibers, a second sheet laminated on the first sheet and containing second fibers, and an adhesive disposed between the first sheet and the second sheet. At least a part of the adhesive is disposed in an end portion along the edge side of the laminate so as to form a linear first region, and the first sheet is adhered to the second sheet via the first region. Alternatively, a mass per unit area of the adhesive present in an end portion along an edge side of the laminate is larger than a mass per unit area of the adhesive present in a portion near a central part of the laminate rather than the end portion.Type: ApplicationFiled: December 9, 2016Publication date: August 3, 2017Inventors: Kouji IKEDA, Koji MOTOMURA, Takatoshi MITSUSHIMA
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Publication number: 20170151748Abstract: A laminated nonwoven fabric includes a first nonwoven fabric containing first fibers, a second nonwoven fabric laminated on the first nonwoven fabric and containing second fibers, a third nonwoven fabric laminated on the second nonwoven fabric on an opposite side to the first nonwoven fabric and containing third fibers, and an adhesive containing a plurality of particles. Some of the plurality of particles of the adhesive is attached to the second nonwoven fabric. At least one of the first nonwoven fabric and the third nonwoven fabric is adhered to the second nonwoven fabric via the some of the plurality of particles of the adhesive. An average fiber diameter of the first fibers is larger than the average fiber diameter of the second fibers, and an average particle diameter of the plurality of particles of the adhesive is smaller than the average fiber diameter of the first fibers.Type: ApplicationFiled: November 15, 2016Publication date: June 1, 2017Inventors: Koji MOTOMURA, Hiroto SUMIDA, Taichi NAKAMURA, Takayoshi YAMAGUCHI, Takatoshi MITSUSHIMA
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Publication number: 20170028335Abstract: A laminated nonwoven fabric (NF) includes a first NF containing first fibers and a second NF containing second fibers and laminated on the first NF, and has a cut-off edge at an end thereof. An average diameter of the first fibers is larger than that of the second fibers not more than 3 ?m. 50% by mass to 70% by mass, inclusive, of the second fibers satisfy x?y, and 5% by mass to 30% by mass, inclusive, thereof satisfy x<y/2. “x” is a vector component in a direction (X axis direction) of the cut-off edge, and “y” is a vector component in Y axis direction perpendicular to X axis and parallel to a principal surface of the laminated NF. When the second NF is viewed from Z axis direction perpendicular to X and Y axes, at least some of the second fibers satisfying x<y/2 overlap the second fibers satisfying x?y.Type: ApplicationFiled: June 10, 2016Publication date: February 2, 2017Inventors: TAICHI NAKAMURA, TAKAYOSHI YAMAGUCHI, HIROTO SUMIDA, TAKAHIRO KUROKAWA, TAKATOSHI MITSUSHIMA
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Publication number: 20170028329Abstract: A laminated nonwoven fabric includes a first nonwoven fabric containing first fibers, a second nonwoven fabric containing second fibers, a third nonwoven fabric containing third fibers, and an adhesive. The second nonwoven fabric is laminated on the first nonwoven fabric, and the third nonwoven fabric is laminated on the second nonwoven fabric on an opposite side with respect to the first nonwoven fabric. The adhesive is disposed between the first nonwoven fabric and the third nonwoven fabric. An average fiber diameter of the second fibers is equal to or less than 3 ?m, and is smaller than an average fiber diameter of the first fibers. The third nonwoven fabric has a protrusion including a part of the third fibers entangled with each other on a surface facing the second nonwoven fabric. At least a part of the adhesive is disposed between the protrusion and the first nonwoven fabric.Type: ApplicationFiled: June 23, 2016Publication date: February 2, 2017Inventors: KOJI MOTOMURA, TAKAHIKO MURATA, HIROTO SUMIDA, TAKATOSHI MITSUSHIMA, KEIJI FUJIWARA
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Publication number: 20160367924Abstract: A laminated nonwoven fabric includes a first nonwoven fabric and a second nonwoven fabric. The first nonwoven fabric contains charged first fibers. The second nonwoven fabric contains second fibers, and is laminated on the first nonwoven fabric. A fiber diameter of the first fibers is larger than a fiber diameter of the second fibers.Type: ApplicationFiled: May 27, 2016Publication date: December 22, 2016Inventors: KOJI MOTOMURA, HIROTO SUMIDA, TAKAHIRO KUROKAWA, TAICHI NAKAMURA, TAKAYOSHI YAMAGUCHI, TAKATOSHI MITSUSHIMA
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Publication number: 20160199766Abstract: A laminated nonwoven fabric includes a first nonwoven fabric that comprises first fibers, and a second nonwoven fabric that comprises second fibers. The second nonwoven fabric is laminated on the first nonwoven fabric. An average fiber diameter D1 of the first fibers and an average fiber diameter D2 of the second fibers satisfy a relation of D1>D2. In viewed from a side of a principal surface of the second nonwoven fabric being not opposed to the first nonwoven fabric, a total area of first portions of the second fibers superimposed on the first fibers and existing on the nearer side than the first fibers is larger than a total area of second portions of the second fibers existing and superimposed on voids S of the first nonwoven fabric formed of the first fibers.Type: ApplicationFiled: September 30, 2015Publication date: July 14, 2016Inventors: Koji MOTOMURA, Takahiko MURATA, Hiroto SUMIDA, Takahiro KUROKAWA, Takatoshi MITSUSHIMA
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Publication number: 20150243951Abstract: A battery includes a positive electrode, a negative electrode, a separator interposed therebetween, and an electrolyte. The separator includes a plurality of nanofibers and has a form of a sheet having a first surface and a second surface opposite thereto. When the average maximum fiber diameter of the nanofibers in the plane direction of the separator is compared between in vicinities of the first and second surfaces and at a center portion in the thickness direction of the separator, average maximum fiber diameters Ds1 and Ds2 of the nanofibers in the vicinity of the first and second surfaces are smaller than an average maximum fiber diameter Dc of the nanofibers at the center portion in the thickness direction of the separator.Type: ApplicationFiled: May 11, 2015Publication date: August 27, 2015Inventors: Hiroto SUMIDA, Takahiro KUROKAWA, Takayoshi YAMAGUCHI, Takatoshi MITSUSHIMA
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Patent number: 9059453Abstract: A battery includes a positive electrode, a negative electrode, a separator interposed therebetween, and an electrolyte. The separator includes a plurality of nanofibers and has a form of a sheet having a first surface and a second surface opposite thereto. When the average maximum fiber diameter of the nanofibers in the plane direction of the separator is compared between in vicinities of the first and second surfaces and at a center portion in the thickness direction of the separator, average maximum fiber diameters Ds1 and Ds2 of the nanofibers in the vicinity of the first and second surfaces arc smaller than an average maximum fiber diameter Dc of the nanofibers at the center portion in the thickness direction of the separator.Type: GrantFiled: January 16, 2013Date of Patent: June 16, 2015Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Hiroto Sumida, Takahiro Kurokawa, Takayoshi Yamaguchi, Takatoshi Mitsushima
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Publication number: 20140342027Abstract: A nanofiber manufacturing apparatus (100) which produces nanofibers (301) by electrically stretching a solution (300) in space. The apparatus includes: an effusing body (115) having effusing holes (118) for effusing the solution into the space, a tip part (116) in which openings (119) are arranged at given intervals, and two side wall parts (117) provided so as to extend from both sides of the tip part so that the effusing holes are located between the side wall parts and the distance between the side wall parts increases with the distance from the tip part; a charging electrode (121) disposed at a given distance from the effusing body; and a charging power supply (122) which applies a given voltage between the effusing body and the charging electrode.Type: ApplicationFiled: August 5, 2014Publication date: November 20, 2014Inventors: Kazunori ISHIKAWA, Hiroto SUMIDA, Takahiro KUROKAWA, Masanobu MIYATA, Takatoshi MITSUSHIMA
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Patent number: 8834775Abstract: A nanofiber manufacturing apparatus (100) which produces nanofibers (301) by electrically stretching a solution (300) in space. The apparatus includes: an effusing body (115) having effusing holes (118) for effusing the solution into the space, a tip part (116) in which openings (119) are arranged at given intervals, and two side wall parts (117) provided so as to extend from both sides of the tip part so that the effusing holes are located between the side wall parts and the distance between the side wall parts increases with the distance from the tip part; a charging electrode (121) disposed at a given distance from the effusing body; and a charging power supply (122) which applies a given voltage between the effusing body and the charging electrode.Type: GrantFiled: August 11, 2010Date of Patent: September 16, 2014Assignee: Panasonic CorporationInventors: Kazunori Ishikawa, Hiroto Sumida, Takahiro Kurokawa, Masanobu Miyata, Takatoshi Mitsushima
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Publication number: 20140227602Abstract: Disclosed is a battery with reduced contact resistance at the contact surfaces between the separator and the electrodes, a battery separator capable of reducing contact resistance with the electrodes, and a production method thereof. The battery includes a positive electrode, a negative electrode, a separator interposed therebetween, and an electrolyte. The separator has a matrix structure of nanofibers formed by electrospinning and has a form of a sheet having a first surface and a second surface opposite thereto. When the average maximum fiber diameter of the nanofibers in the plane direction of the separator is compared between in vicinities of the first and second surfaces and at a center portion in the thickness direction of the separator, average maximum fiber diameters Ds1 and Ds2 of the nanofibers in the vicinity of the first and second surfaces are smaller than an average maximum fiber diameter Dc of the nanofibers at the center portion in the thickness direction of the separator.Type: ApplicationFiled: January 16, 2013Publication date: August 14, 2014Applicant: PANASONIC CORPORATIONInventors: Hiroto Sumida, Takahiro Kurokawa, Takayoshi Yamaguchi, Takatoshi Mitsushima