Patents by Inventor Jotaro Nagao
Jotaro Nagao 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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Publication number: 20230415381Abstract: Impurities are removed from plastic by cleaning using, as a cleaning medium, water heated to a level where a dielectric constant is 60 or less.Type: ApplicationFiled: November 15, 2021Publication date: December 28, 2023Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Yuuki TASHIRO, Seishi YOSHIKAWA, Jotaro NAGAO, Azusa OTSUKI
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Publication number: 20180042766Abstract: A nozzle includes a front end part, wherein the nozzle is composed of a non-fluorine-based resin, and wherein fluorine atoms are incorporated into a molecular chain of the non-fluorine-based resin constituting a surface of the nozzle. A nozzle includes a front end part, wherein a surface of the front end part is provided with a first surface positioned on the center side of the nozzle and a second surface continuing to an outer peripheral side of the first surface, and wherein the first surface and the second surface are composed of surfaces differing in surface free energy.Type: ApplicationFiled: September 1, 2017Publication date: February 15, 2018Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Jotaro Nagao, Kota Okamoto, Tsutomu Iwasaki, Masaki Aoya, Satoo Kimura
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Patent number: 8911225Abstract: [Problem] To suppress the deviation of a synthetic resin to be fed to a metal mold and to enable the to-be-compression-molded synthetic resin to be easily molded into a shape of a pre-molded article that is to be molded. [Means for Solution] A female mold 31 includes a moving rod 34 and female mold body 33 surrounding the moving rod 34, the female mold body 33 forming a cavity 33a that is opened upward, the moving rod 34 moving up and down between a normal position and an elevated position above the normal position, and when a synthetic resin 8 is to be fallen down from the a synthetic resin cutting/holding unit 14, the moving rod 34 moves to the elevated position so that the synthetic resin 8 falls down on the upper surface of the center member.Type: GrantFiled: October 23, 2008Date of Patent: December 16, 2014Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Yutaka Asano, Norihisa Hirota, Jotaro Nagao
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Patent number: 8765038Abstract: A method of feeding a composite molten resin capable of easily forming a multi-kind-multi-layer preform. An apparatus for feeding the composite molten resin has a nozzle portion which includes an outer discharge port in which an outermost annular flow path through which a main layer-forming molten resin flows, meets an outer annular flow path through which a sub-layer-forming molten resin flows inside of the outermost annular flow path; and an inner discharge port in which a shell layer-forming molten resin annularly flowing inside of the outer conflux path, meets the core layer-forming molten resin flowing inside the shell layer; the outer discharge port and the inner discharge port being arranged in this order from the downstream toward the upstream in a direction in which the molten resins flow; wherein provision is made of a shaft-like opening/closing valve for opening and closing the inner discharge port, and a gear pump for intermittently discharging the sub-layer-forming molten resin.Type: GrantFiled: March 15, 2007Date of Patent: July 1, 2014Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Norihisa Hirota, Kazunobu Watanabe, Yutaka Asano, Jotaro Nagao
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Patent number: 8236398Abstract: A cup-type polypropylene container obtained by compression-molding a polypropylene and having at least a body portion and a bottom portion, wherein the body portion has a thickness of not larger than 1.0 mm and a value K1 relating to peak intensity ratio and/or a value K2 relating to diffraction intensity ratio as defined herein. The cup-type polypropylene container features improved falling strength in the body portion and at the open end such as flange, improved pressure strength and excellent mechanical strength in the body portion. Also disclosed is a method of molding the cup-type polypropylene container.Type: GrantFiled: September 10, 2007Date of Patent: August 7, 2012Assignee: Toyo Seikan Kaisha, Ltd.Inventors: Jotaro Nagao, Norihisa Hirota, Yutaka Asano
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Publication number: 20100233398Abstract: A cup-type polypropylene container obtained by compression-molding a polypropylene and having at least a body portion and a bottom portion, wherein the body portion has a thickness of not larger than 1.0 mm and a value K1 relating to peak intensity ratio and/or a value K2 relating to diffraction intensity ratio as defined herein. The cup-type polypropylene container features improved falling strength in the body portion and at the open end such as flange, improved pressure strength and excellent mechanical strength in the body portion. Also disclosed is a method of molding the cup-type polypropylene container.Type: ApplicationFiled: September 10, 2007Publication date: September 16, 2010Applicant: Toyo Seikan Kaisha, LTDInventors: Jotaro Nagao, Norihisa Hirota, Yutaka Asano
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Publication number: 20100201032Abstract: [Problem] To suppress the deviation of a synthetic resin to be fed to a metal mold and to enable the to-be-compression-molded synthetic resin to be easily molded into a shape of a pre-molded article that is to be molded. [Means for Solution] A female mold 31 includes a moving rod 34 and female mold body 33 surrounding the moving rod 34, the female mold body 33 forming a cavity 33a that is opened upward, the moving rod 34 moving up and down between a normal position and an elevated position above the normal position, and when a synthetic resin 8 is to be fallen down from the a synthetic resin cutting/holding unit 14, the moving rod 34 moves to the elevated position so that the synthetic resin 8 falls down on the upper surface of the center member.Type: ApplicationFiled: October 23, 2008Publication date: August 12, 2010Applicant: TOYO SEIKAN KAISHA, LTD.Inventors: Yutaka Asano, Norihisa Hirota, Jotaro Nagao
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Publication number: 20090096129Abstract: A method of feeding a composite molten resin capable of easily forming a multi-kind-multi-layer preform. An apparatus for feeding the composite molten resin has a nozzle portion which includes an outer discharge port in which an outermost annular flow path through which a main layer-forming molten resin flows, meets an outer annular flow path through which a sub-layer-forming molten resin flows inside of the outermost annular flow path; and an inner discharge port in which a shell layer-forming molten resin annularly flowing inside of the outer conflux path, meets the core layer-forming molten resin flowing inside the shell layer; the outer discharge port and the inner discharge port being arranged in this order from the downstream toward the upstream in a direction in which the molten resins flow; wherein provision is made of a shaft-like opening/closing valve for opening and closing the inner discharge port, and a gear pump for intermittently discharging the sub-layer-forming molten resin.Type: ApplicationFiled: March 15, 2007Publication date: April 16, 2009Inventors: Norihisa Hirota, Kazunobu Watanabe, Yutaka Asano, Jotaro Nagao
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Publication number: 20090014915Abstract: A method of feeding a molten resin mass, which is capable of causing a molten resin mass to fall down into a female mold for compression molding without delay in the timing from a cylindrical transfer guide that cuts a portion of a molten resin extruded from a die head of an extruder and transfers it to a female mold for compression forming, and an apparatus therefor. The apparatus for feeding the molten resin mass has a cylindrical transfer guide which transfers a molten resin mass obtained by cutting a predetermined amount of a molten resin extruded from a die head of an extruder to a female mold for compression molding, wherein the transfer guide is provided with vibration-generating means for imparting vibration to the transfer guide. In the method of feeding the molten resin mass, the pressure in the cylindrical transfer guide is set to be higher than the pressure in the female mold for compression molding.Type: ApplicationFiled: February 16, 2007Publication date: January 15, 2009Applicant: TOYO SEIKAN KAISHA, LTD.Inventors: Yutaka Asano, Norihisa Hirota, Jotaro Nagao, Kazunobu Watanabe