Patents by Inventor Keisuke Nagai

Keisuke Nagai 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).

  • Patent number: 12240985
    Abstract: The purpose of the present invention is to provide an ink for ink-jet printers, the ink being able to be reduced in the content of an electroconductive agent and having low resistance. The ink for ink-jet printers of a charge control type according to the present invention, which is provided in order to overcome the problem, is characterized by comprising a resin, a pigment, an electroconductive agent, and a nonaqueous solvent, the electroconductive agent having a salt structure which generates an anion and a cation in the nonaqueous solvent, the anion having a trifluoromethylsulfonyl group and the cation being a quaternary ammonium cation or having an unsaturated heterocyclic structure.
    Type: Grant
    Filed: February 20, 2019
    Date of Patent: March 4, 2025
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Hiroshi Sasaki, Takuya Otowa, Masahiko Ogino, Keisuke Nagai, Tamaki Wada
  • Publication number: 20200385594
    Abstract: The purpose of the present invention is to provide an ink for ink-jet printers, the ink being able to be reduced in the content of an electroconductive agent and having low resistance. The ink for ink-jet printers of a charge control type according to the present invention, which is provided in order to overcome the problem, is characterized by comprising a resin, a pigment, an electroconductive agent, and a nonaqueous solvent, the electroconductive agent having a salt structure which generates an anion and a cation in the nonaqueous solvent, the anion having a trifluoromethylsulfonyl group and the cation being a quaternary ammonium cation or having an unsaturated heterocyclic structure.
    Type: Application
    Filed: February 20, 2019
    Publication date: December 10, 2020
    Inventors: Hiroshi SASAKI, Takuya OTOWA, Masahiko OGINO, Keisuke NAGAI, Tamaki WADA
  • Patent number: 10843477
    Abstract: A makeup fluid is added to an ink liquid of an inkjet printer to reduce the viscosity of the ink liquid, the makeup fluid including a fluorescent color material in a solvent. An inkjet printer apparatus employing a makeup fluid is provided with a makeup fluid tank to which a light-emitting element and a light-receiving element are attached, and detects the presence or absence of the makeup fluid by irradiating ultraviolet light from the light-emitting element, causing visible light to be emitted from the fluorescent color material in the makeup fluid, and detecting the visible light with the light-receiving element.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: November 24, 2020
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Takuya Otowa, Masahiko Ogino, Hiroshi Sasaki, Takahiro Arima, Keisuke Nagai, Hiromichi Takeyama, Shengnan Hua
  • Patent number: 10399343
    Abstract: In order to make it possible to inform as apparatus handler through a simple, means of precautions to take in handling ink of the correct ID number when an inputted ink ID number is correct, this inkjet recording apparatus is provided with a print head having; a nozzle part, an ink container that houses ink supplied to the nozzle part, information reading unit for reading information that distinguishes the type of ink accompanying an ink supply container that supplies ink to the ink container, a determination unit for determining from the read information whether the ink housed in the ink supply container is the correct ink, a storage unit for storing ink-related information in correlation with the ink-type-distinguishing information, a stored-information extraction unit for extracting from the storage unit the ink-related information corresponding to the ink-type-distinguishing information read by the information reading unit when the ink is determined to be correct by the determination unit, and a display u
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: September 3, 2019
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Ryosuke Suzuki, Manabu Kato, Masahiko Sakuraba, Keisuke Nagai
  • Patent number: 10308019
    Abstract: The present invention addresses the problem of enabling a charge control-type inkjet printer to enable real-time control during an operation and to maintain optimal printing conditions while operating. This charge control-type inkjet printer is provided with: a printing head including a nozzle unit for discharging ink; a pressure reduction valve for adjusting the pressure of the ink to be supplied to the nozzle unit of the printing head; and an ink container for accommodating the ink to be supplied to the nozzle unit of the printing head, wherein an imaging unit is further provided which images an image of ink that is discharged from the nozzle unit and is in a particulate state.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: June 4, 2019
    Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Hiromichi Takeyama, Masahiko Ogino, Keisuke Nagai, Takashi Sato
  • Publication number: 20180304639
    Abstract: A makeup fluid is added to an ink liquid of an inkjet printer to reduce the viscosity of the ink liquid, the makeup fluid including a fluorescent color material in a solvent. An inkjet printer apparatus employing a makeup fluid is provided with a makeup fluid tank to which a light-emitting element and a light-receiving element are attached, and detects the presence or absence of the makeup fluid by irradiating ultraviolet light from the light-emitting element, causing visible light to be emitted from the fluorescent color material in the makeup fluid, and detecting the visible light with the light-receiving element.
    Type: Application
    Filed: June 3, 2016
    Publication date: October 25, 2018
    Inventors: Takuya OTOWA, Masahiko OGINO, Hiroshi SASAKI, Takahiro ARIMA, Keisuke NAGAI, Hiromichi TAKEYAMA, Shengnan HUA
  • Publication number: 20180291221
    Abstract: In an ink for an inkjet printer of an electrostatic charging control type, the ink including a resin, a pigment, a conductive agent, and a solvent, for the resin, one that contains carboxyl groups or hydroxyl groups is used. Thus, an ink print applied to a material including a large quantity of a plasticizer can be made stable over a prolonged period of time without subjecting the ink print to an ultraviolet irradiation or other special treatments.
    Type: Application
    Filed: June 14, 2018
    Publication date: October 11, 2018
    Inventors: Hiroshi SASAKI, Masahiko OGINO, Takuya OTOWA, Tomoko MAEJIMA, Keisuke NAGAI
  • Publication number: 20180281401
    Abstract: The present invention addresses the problem of enabling a charge control-type inkjet printer to enable real-time control during an operation and to maintain optimal printing conditions while operating. This charge control-type inkjet printer is provided with: a printing head including a nozzle unit for discharging ink; a pressure reduction valve for adjusting the pressure of the ink to be supplied to the nozzle unit of the printing head; and an ink container for accommodating the ink to be supplied to the nozzle unit of the printing head, wherein an imaging unit is further provided which images an image of ink that is discharged from the nozzle unit and is in a particulate state.
    Type: Application
    Filed: September 26, 2016
    Publication date: October 4, 2018
    Inventors: Hiromichi TAKEYAMA, Masahiko OGINO, Keisuke NAGAI, Takashi SATO
  • Publication number: 20180250941
    Abstract: In order to make it possible to inform as apparatus handler through a simple, means of precautions to take in handling ink of the correct ID number when an inputted ink ID number is correct, this inkjet recording apparatus is provided with a print head having; a nozzle part, an ink container that houses ink supplied to the nozzle part, information reading unit for reading information that distinguishes the type of ink accompanying an ink supply container that supplies ink to the ink container, a determination unit for determining from the read information whether the ink housed in the ink supply container is the correct ink, a storage unit for storing ink-related information in correlation with the ink-type-distinguishing information, a stored-information extraction unit for extracting from the storage unit the ink-related information corresponding to the ink-type-distinguishing information read by the information reading unit when the ink is determined to be correct by the determination unit, and a display u
    Type: Application
    Filed: August 5, 2016
    Publication date: September 6, 2018
    Inventors: Ryosuke SUZUKI, Manabu KATO, Masahiko SAKURABA, Keisuke NAGAI
  • Publication number: 20170355253
    Abstract: A sealing structure for use on an automobile having a weather strip and an interior member wherein the weather strip includes an installation base member having an inner-cabin side wall, an outer-cabin side wall, a connecting wall and holding lips; and a seal member. The installation base member couples to a flange vertically formed along a peripheral edge of an opening corresponding to a door. The seal member is formed on the outer-cabin side wall and makes elastic contact with a door glass. The interior member is provided on an inner-cabin side of the inner-cabin side wall. An end of the interior member extends toward the connecting wall. A projection is formed on an outer circumference of a connecting part between the outer-cabin side wall and the connecting wall. The projection extends in an internal circumferential direction and covers the end of the interior member from an outer-cabin side.
    Type: Application
    Filed: June 8, 2017
    Publication date: December 14, 2017
    Inventors: Hirofumi OGAWA, Satoshi MAESAKI, Kayo YONEDA, Keisuke NAGAI, Takuya TANI
  • Patent number: 9541564
    Abstract: The present invention provides a reagent for assaying D-dimer which includes carriers sensitized to first and second monoclonal antibodies which react with D-dimer, but have different reactivity to D-dimer in which the first monoclonal antibody reacts with high- and low-molecular fractions of D-dimer, the second monoclonal antibody reacts with the high-molecular fraction, but reactivity of the second monoclonal antibody with the low-molecular fraction is different from that of the first monoclonal antibody and a kit of reagent for assaying D-dimer.
    Type: Grant
    Filed: April 18, 2016
    Date of Patent: January 10, 2017
    Assignee: SYSMEX CORPORATION
    Inventors: Keisuke Nagai, Kazuaki Yamashita, Susumu Hoshiko, Takeshi Suzuki
  • Publication number: 20160231339
    Abstract: The present invention provides a reagent for assaying D-dimer which includes carriers sensitized to first and second monoclonal antibodies which react with D-dimer, but have different reactivity to D-dimer in which the first monoclonal antibody reacts with high- and low-molecular fractions of D-dimer, the second monoclonal antibody reacts with the high-molecular fraction, but reactivity of the second monoclonal antibody with the low-molecular fraction is different from that of the first monoclonal antibody and a kit of reagent for assaying D-dimer.
    Type: Application
    Filed: April 18, 2016
    Publication date: August 11, 2016
    Applicant: SYSMEX CORPORATION
    Inventors: Keisuke NAGAI, Kazuaki YAMASHITA, Susumu HOSHIKO, Takeshi SUZUKI
  • Patent number: 9347957
    Abstract: The present invention provides a reagent for assaying D-dimer which includes carriers sensitized to first and second monoclonal antibodies which react with D-dimer, but have different reactivity to D-dimer in which the first monoclonal antibody reacts with high- and low-molecular fractions of D-dimer, the second monoclonal antibody reacts with the high-molecular fraction, but reactivity of the second monoclonal antibody with the low-molecular fraction is different from that of the first monoclonal antibody and a kit of reagent for assaying D-dimer.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: May 24, 2016
    Assignee: SYSMEX CORPORATION
    Inventors: Keisuke Nagai, Kazuaki Yamashita, Susumu Hoshiko, Takeshi Suzuki
  • Publication number: 20160083600
    Abstract: In an ink for an inkjet printer of an electrostatic charging control type, the ink including a resin, a pigment, a conductive agent, and a solvent, for the resin, one that contains carboxyl groups or hydroxyl groups is used. Thus, an ink print applied to a material including a large quantity of a plasticizer can be made stable over a prolonged period of time without subjecting the ink print to an ultraviolet irradiation or other special treatments.
    Type: Application
    Filed: February 4, 2014
    Publication date: March 24, 2016
    Applicant: Hitachi Industrial Equipment Systems Co., Ltd.
    Inventors: Hiroshi SASAKI, Masahiko OGINO, Takuya OTOWA, Tomoko MAEJIMA, Keisuke NAGAI
  • Publication number: 20120028370
    Abstract: The present invention provides a reagent for assaying D-dimer which includes carriers sensitized to first and second monoclonal antibodies which react with D-dimer, but have different reactivity to D-dimer in which the first monoclonal antibody reacts with high- and low-molecular fractions of D-dimer, the second monoclonal antibody reacts with the high-molecular fraction, but reactivity of the second monoclonal antibody with the low-molecular fraction is different from that of the first monoclonal antibody and a kit of reagent for assaying D-dimer.
    Type: Application
    Filed: July 25, 2011
    Publication date: February 2, 2012
    Applicant: SYSMEX CORPORATION
    Inventors: Keisuke NAGAI, Kazuaki YAMASHITA, Susumu HOSHIKO, Takeshi SUZUKI
  • Patent number: 6679079
    Abstract: An air conditioning system for a vehicle has a plurality of heat enhancing means including at least a hot gas heater cycle for heating air blown into a passenger compartment by directly introducing a discharged gas refrigerant from a compressor into an interior heat exchanger. Additionally, an electric heater is provided as another passenger compartment heating enhancing means. When heat requirements are high (outside air temperature is low), both the hot gas heater cycle and the electric heater are activated, and when the heat requirements decrease, the hot gas heater cycle is deactivated first, and then the electric heater is deactivated. Therefore, the adverse effects of a vehicle compartment temperature that the driver is sensing can be avoided. Additionally, controlling vehicle window fogging associated with an operation of the hot gas heater cycle is possible.
    Type: Grant
    Filed: September 10, 2002
    Date of Patent: January 20, 2004
    Assignee: Denso Corporation
    Inventors: Keisuke Nagai, Yoshiaki Takano
  • Patent number: 6662579
    Abstract: In a vehicle air conditioner, a refrigerant cycle system is constructed to switch a cooling refrigerant cycle where an interior heat exchanger is used as an evaporator, and a hot gas heater cycle where the interior heat exchanger is used as a radiator. Further, it is determined whether the interior heat exchanger has a quantity of retained water in a heating mode due to the hot gas heater cycle. When it is determined that the quantity of retained water is in the interior heat exchanger in the heating mode, operation of a compressor of the refrigerant cycle system is intermittently controlled so that temperature of air blown from the interior heat exchanger becomes lower than temperature of a vehicle windshield.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: December 16, 2003
    Assignee: Denso Corporation
    Inventors: Yoshiaki Takano, Takahisa Suzuki, Satoshi Izawa, Keisuke Nagai, Shun Kurata
  • Publication number: 20030046943
    Abstract: In a vehicle air conditioner, a refrigerant cycle system is constructed to switch a cooling refrigerant cycle where an interior heat exchanger is used as an evaporator, and a hot gas heater cycle where the interior heat exchanger is used as a radiator. Further, it is determined whether the interior heat exchanger has a quantity of retained water in a heating mode due to the hot gas heater cycle. When it is determined that the quantity of retained water is in the interior heat exchanger in the heating mode, operation of a compressor of the refrigerant cycle system is intermittently controlled so that temperature of air blown from the interior heat exchanger becomes lower than temperature of a vehicle windshield.
    Type: Application
    Filed: September 12, 2002
    Publication date: March 13, 2003
    Inventors: Yoshiaki Takano, Takahisa Suzuki, Satoshi Izawa, Keisuke Nagai, Shun Kurata
  • Publication number: 20030046946
    Abstract: An air conditioning system for a vehicle has a plurality of heat enhancing means including at least a hot gas heater cycle for heating air blown into a passenger compartment by directly introducing a discharged gas refrigerant from a compressor into an interior heat exchanger. Additionally, an electric heater is provided as another passenger compartment heating enhancing means. When heat requirements are high (outside air temperature is low), both the hot gas heater cycle and the electric heater are activated, and when the heat requirements decrease, the hot gas heater cycle is deactivated first, and then the electric heater is deactivated. Therefore, the adverse effects of a vehicle compartment temperature that the driver is sensing can be avoided. Additionally, controlling vehicle window fogging associated with an operation of the hot gas heater cycle is possible.
    Type: Application
    Filed: September 10, 2002
    Publication date: March 13, 2003
    Inventors: Keisuke Nagai, Yoshiaki Takano
  • Patent number: 6477858
    Abstract: The refrigerant cycle apparatus comprises a communication pipe 32 which is an upper refrigerant flow-in means allowing the refrigerant which has passed through a condenser 2 to flow into the upper part of a liquid receiver 31, and a communication hole 33 which is a lower refrigerant flow-in means allowing the refrigerant which has passed through the condenser 2 to flow into the lower part of the liquid receiver 31, and the flow rate (Gr1) of refrigerant flowing into the upper part of the liquid receiver 31 from the communication pipe 32 is set at a value between 30 kg/h and 110 kg/h. As a result of this, preventing heat damage due to the heat given to the liquid receiver from the outside and securing the good bubble disappearing characteristic of the liquid refrigerant flowing out from the liquid receiver are mutually compatible, and thereby an improved refrigerant filling characteristic may be obtained.
    Type: Grant
    Filed: November 19, 2001
    Date of Patent: November 12, 2002
    Assignee: Denso Corporation
    Inventors: Tetsuji Nobuta, Takahisa Suzuki, Keisuke Nagai