Patents by Inventor Akinobu Sakamoto
Akinobu Sakamoto 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: 11491494Abstract: A nonaqueous electrolyte secondary battery separator film transfer device is provided which realizes a foreign object removing technique that is less likely to cause defects in a separator. The device includes a magnet bar which is arranged in a transfer path and generates a magnetic field for removing, from a separator film being transferred, a magnetic substance adhering to a first surface of the separator film; and an air cylinder which allows a distance to the magnet bar from the first surface of the separator film to be variable.Type: GrantFiled: October 24, 2018Date of Patent: November 8, 2022Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Yosuke Tsukuda, Yusuke Kon, Wataru Sakuma, Akinobu Sakamoto, Tatsuya Kataoka, Takamasa Egawa
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Publication number: 20210184310Abstract: A nonaqueous electrolyte secondary battery separator film transfer device is provided which realizes a foreign object removing technique that is less likely to cause defects in a separator. The device includes a magnet bar which is arranged in a transfer path and generates a magnetic field for removing, from a separator film being transferred, a magnetic substance adhering to a first surface of the separator film; and an air cylinder which allows a distance to the magnet bar from the first surface of the separator film to be variable.Type: ApplicationFiled: October 24, 2018Publication date: June 17, 2021Inventors: Yosuke TSUKUDA, Yusuke KON, Wataru SAKUMA, Akinobu SAKAMOTO, Tatsuya KATAOKA, Takamasa EGAWA
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Patent number: 10457520Abstract: In order to provide a film roll that includes a core having improved rigidity without increasing a cost, the present invention provides a film roll including: a cylindrical core; and a film wound around an outer peripheral surface of the core, the core satisfying the following inequality: D×0.0017+0.50<T1/T2<D×0.0017+0.95, wherein D (mm) denotes a difference between an outer diameter of the core and an inner diameter of the core, T1 (mm) denotes a thickness of an outer peripheral part, and T2 (mm) denotes a thickness of an inner peripheral part.Type: GrantFiled: January 24, 2017Date of Patent: October 29, 2019Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventor: Akinobu Sakamoto
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Publication number: 20190312249Abstract: Provided is a separator roll in which deformation is reduced and an external quality is improved. In the separator roll, a separator is wound around a core, and an absolute value of radial stress ?r applied to the core is not more than a critical stress ?cr. The critical stress ?cr is a value obtained by multiplying A by B, where: A is an absolute value, of radial stress ?r applied to the core, as observed in a case where a maximum value of Von Mises stress ?m in the core is equal to a yield stress ?y of a material of the core; and B is a safety factor of 0.5.Type: ApplicationFiled: June 24, 2019Publication date: October 10, 2019Inventor: Akinobu SAKAMOTO
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Patent number: 10301135Abstract: A method accurately determines internal stress in a film roll and prevents defects in the film roll. A film winding device includes a take-up roller and a winding tension adjustment device. A calculation device uses a winding equation in which a winding tension function is explicitly expressed, the winding tension function expressing a winding tension as a function of a radius of a core. The winding tension adjustment device controls winding tension in accordance with a winding tension distribution function calculated by the calculation device.Type: GrantFiled: March 13, 2017Date of Patent: May 28, 2019Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventor: Akinobu Sakamoto
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Patent number: 9861510Abstract: A cervical orthosis comprises a main body supporting member having an occipital region supporting part; and a plurality of belt-like members for fixing the main body supporting member to a human body. An occipital region receiving member is fixed inside the occipital region supporting part at the positions near a temporal part at a predetermined interval from a curved surface of the occipital region supporting part, whereby the occipital region receiving member is deformed according to the shape of an occipital region and a pressure is distributed when the patient is in the supine posture.Type: GrantFiled: June 17, 2013Date of Patent: January 9, 2018Assignees: Rakuhokugishi Prosthetic and Orthotic Manufacturing Co., Ltd., Rehabitech Co., Ltd.Inventors: Tsutomu Sakamoto, Akinobu Sakamoto, Takeshi Hanajima, Ban Masuhara, Masaya Nomura, Kanji Mori
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Publication number: 20170267480Abstract: A method accurately determines internal stress in a film roll and prevents defects in the film roll. A film winding device includes a take-up roller and a winding tension adjustment device. A calculation device uses a winding equation in which a winding tension function is explicitly expressed, the winding tension function expressing a winding tension as a function of a radius of a core. The winding tension adjustment device controls winding tension in accordance with a winding tension distribution function calculated by the calculation device.Type: ApplicationFiled: March 13, 2017Publication date: September 21, 2017Inventor: Akinobu SAKAMOTO
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Publication number: 20170271640Abstract: Provided is a separator roll in which deformation is reduced and an external quality is improved. In the separator roll, a separator is wound around a core, and an absolute value of radial stress ?r applied to the core is not more than a critical stress ?cr. The critical stress ?cr is a value obtained by multiplying A by B, where: A is an absolute value, of radial stress ?r applied to the core, as observed in a case where a maximum value of Von Mises stress ?m in the core is equal to a yield stress ?y of a material of the core; and B is a safety factor of 0.5.Type: ApplicationFiled: March 13, 2017Publication date: September 21, 2017Inventor: Akinobu SAKAMOTO
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Publication number: 20170210588Abstract: In order to provide a film roll that includes a core having improved rigidity without increasing a cost, the present invention provides a film roll including: a cylindrical core; and a film wound around an outer peripheral surface of the core, the core satisfying the following inequality: D×0.0017+0.50<T1/T2<D×0.0017+0.95, wherein D (mm) denotes a difference between an outer diameter of the core and an inner diameter of the core, T1 (mm) denotes a thickness of an outer peripheral part, and T2 (mm) denotes a thickness of an inner peripheral part.Type: ApplicationFiled: January 24, 2017Publication date: July 27, 2017Inventor: Akinobu SAKAMOTO
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Publication number: 20170187023Abstract: The present invention provides a nonaqueous electrolyte secondary battery separator that achieves an excellent rate characteristic by having a tensile creep compliance J satisfying at least one of the following three conditions in a case where stress of 30 MPa is applied for t seconds: (i) when t=300 seconds, J=4.5 GPa?1 to 14.0 GPa?1, (ii) when t=1800 seconds, J=9.0 GPa?1 to 25.0 GPa?1, (iii) when t=600 seconds, J=12.0 GPa?5 to 32.0 GPa?1.Type: ApplicationFiled: December 22, 2016Publication date: June 29, 2017Inventors: Akinobu SAKAMOTO, Takuya AKIYAMA
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Publication number: 20140371645Abstract: A cervical orthosis comprises a main body supporting member having an occipital region supporting part; and a plurality of belt-like members for fixing the main body supporting member to a human body. An occipital region receiving member is fixed inside the occipital region supporting part at the positions near a temporal part at a predetermined interval from a curved surface of the occipital region supporting part, whereby the occipital region receiving member is deformed according to the shape of an occipital region and a pressure is distributed when the patient is in the supine posture.Type: ApplicationFiled: June 17, 2013Publication date: December 18, 2014Inventors: Tsutomu SAKAMOTO, Akinobu Sakamoto, Takeshi Hanajima, Ban Masuhara, Masaya Nomura, Kanji Mori
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Publication number: 20070100014Abstract: A polypropylene is disclosed which is a linear polypropylene having a ratio of a Z-average molecular weight Mz to a weight-average molecular weight Mw, Mz/Mw, determined by gel permeation chromatography of 4.1 or more, a swell ratio of from 1.4 to 1.8, and an activation energy of flow of from 48 to 105 kJ/(mol·K).Type: ApplicationFiled: October 19, 2006Publication date: May 3, 2007Inventors: Kenichiro Yada, Akinobu Sakamoto
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Patent number: 6878318Abstract: The invention provides, as a method for producing a multi-layer foamed sheet whose scale-like appearance has been improved by means of a multi-layer circular die coextrusion method, a method for producing a multi-layer foamed sheet having foam layers and non-foam layers by a multi-layer circular die coextrusion method which is a method for producing a multi-layer foamed sheet wherein the shear stress at the interface of each layer is 5000 Pa or higher and not higher than 50000 Pa, a method for producing a multi-layer foamed sheet wherein the resin of said non-foam layer is a linear propylenic resin having a melt flow rate of 5 to 30 g/10 minutes, and a method for producing a multi-layer foamed sheet wherein the resin of said foam layer is a propylenic resin whose melt tension (MT) at 190° C. and melt flow rate (MFR) at 230° C. satisfy the following equation A: MT?7.52×MFR (?0.Type: GrantFiled: February 11, 2002Date of Patent: April 12, 2005Assignee: Sumitomo Chemical Company, LimitedInventors: Akinobu Sakamoto, Shigehumi Takuno, Tatsuhiro Nagamatsu
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Patent number: 6693140Abstract: There are disclosed: (1) a container comprising a foamed olefin resin, wherein weight W (g) and content volume V (ml) of the container satisfy the following expression (1): W(g)/V(ml)≦0.055 (1), and (2) a process for producing the container by a blow molding method.Type: GrantFiled: March 6, 2001Date of Patent: February 17, 2004Assignee: Sumitomo Chemical Company, LimitedInventors: Seiji Shiromoto, Haruyuki Suzuki, Akinobu Sakamoto
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Publication number: 20020163098Abstract: The invention provides, as a method for producing a multi-layer foamed sheet whose scale-like appearance has been improved by means of a multi-layer circular die coextrusion method, a method for producing a multi-layer foamed sheet having foam layers and non-foam layers by a multi-layer circular die coextrusion method which is a method for producing a multi-layer foamed sheet wherein the shear stress at the interface of each layer is 5000 Pa or higher and not higher than 50000 Pa, a method for producing a multi-layer foamed sheet wherein the resin of said non-foam layer is a linear propylenic resin having a melt flow rate of 5 to 30 g/10 minutes, and a method for producing a multi-layer foamed sheet wherein the resin of said foam layer is a propylenic resin whose melt tension (MT) at 190° C. and melt flow rate (MFR) at 230° C.Type: ApplicationFiled: February 11, 2002Publication date: November 7, 2002Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Akinobu Sakamoto, Shigehumi Takuno, Tatsuhiro Nagamatsu
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Publication number: 20010031328Abstract: There are disclosed:Type: ApplicationFiled: March 6, 2001Publication date: October 18, 2001Inventors: Seiji Shiromoto, Haruyuki Suzuki, Akinobu Sakamoto
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Patent number: 6290884Abstract: The present invention provides a process for producing uncrosslinked polypropylene-based resin foam sheets which is characterized by using an extrusion foaming apparatus having a gear pump which is interposed between the extruder and the die and which is linked by means of adapters, wherein the pressure (Pg) at the inlet of the gear pump is within the range specified by the following formula (Formula 1) and the extruder is controlled so that the value of Pg is constant. Formula 1 Pc≦Pg(atm)≦Pc+90 Pc=(&khgr;−1)/H &khgr;: theoretical expansion ratio when the foaming agent added is 100% held H: coefficient of solubility of the foaming gas in the resin at the resin temperature in the gear pump inlet (cm3(STP)/cm3·atm) and the like.Type: GrantFiled: July 30, 1999Date of Patent: September 18, 2001Assignee: Sumitomo Chemical Company, LimitedInventors: Akinobu Sakamoto, Tatsuhiro Nagamatsu
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Patent number: 6255237Abstract: There is provided a laminated sheet comprising: (i) a foamed sheet containing a polypropylene resin; and (ii) a non-woven fabric, wherein the foamed sheet has an expansion ratio, &khgr;, of from about 2 to 10, a cell diameter of not more than about 300 &mgr;m, and a thickness, h (cm), satisfying the following formula (1), (100/E(1−(1−1/&khgr;)⅔))⅓≦h≦2 (1) wherein E (kgf/cm2) is a modulus of elasticity in bending of the resin which is to be a constituent of the foamed sheet and is not yet foamed.Type: GrantFiled: October 15, 1999Date of Patent: July 3, 2001Assignee: Sumitomo Chemical Company LimitedInventors: Akinobu Sakamoto, Tatsuhiro Nagamatsu, Sakae Yamamoto
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Patent number: 5616627Abstract: The present invention relates to a polypropylene resin composition containing about 90 to 60 parts by weight of a polypropylene block copolymer (A); and about 10 to 40 parts by weight of a polyethylene resin (B), wherein the polypropylene block copolymer is a polypropylene block copolymer which contains about 99 to 90% by weight of a crystalline polypropylene (a) and about 1 to 10% by weight of an amorphous ethylene-.alpha.-olefin copolymer (b) and has a melt flow rate (MFR) of about 2 to 15 g/10 minutes, and a die swell ratio, measured by a capillary rheometer, of at least 1.7. Foamed materials containing a fine and uniform foam are obtainable from this composition.Type: GrantFiled: July 17, 1995Date of Patent: April 1, 1997Assignee: Sumitomo Chemical Company, LimitedInventors: Tadashi Sakurai, Kouichirou Asao, Akinobu Sakamoto