Patents by Inventor Takayuki Yoshii

Takayuki Yoshii 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: 8309172
    Abstract: A method and a device for coating a hollow cylindrical member. The method includes radially coating an entire inner surface of the hollow cylindrical member with a first coating material discharged by a first slit nozzle and simultaneously circularly coating an entire outer surface of the hollow cylindrical member with a second coating material discharged in an axial direction of the hollow cylindrical member by a second slit nozzle located opposite the first slit nozzle with the hollow cylindrical member therebetween. The first slit nozzle and the second slit nozzle discharge the first coating material and the second coating material, respectively, to a same height of the hollow cylindrical member relative to the inner surface and the outer surface thereof.
    Type: Grant
    Filed: June 9, 2008
    Date of Patent: November 13, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Michitaka Higaki, Takayuki Yoshii, Tsuneaki Kondoh, Kohji Kamiya, Hidenori Machida, Satoshi Tohkai
  • Patent number: 8195075
    Abstract: An image forming apparatus includes a fixing unit for fixing a toner image on a recording medium. In at least one embodiment, the fixing unit includes a fixing member configured to heat and melt a toner. Further, in at least one embodiment, the fixing member has a surface contacting the toner image and includes a wettability not greater than 38 mN/m.
    Type: Grant
    Filed: September 10, 2007
    Date of Patent: June 5, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroshi Yoshinaga, Takayuki Yoshii, Kohji Kamiya, Masanao Ehara
  • Patent number: 8137883
    Abstract: A toner is provided including a binder resin and a wax having primarily C—H and C—C bonds, and having a melting point of 50 to 90° C., wherein the wax is present in a surface portion of the toner in an amount of from 0.1 to 4.0% by weight, wherein the amount of the wax is determined by Fourier transform infrared spectroscopy attenuated total reflectance (FTIR-ATR); and the use of the toner in an image forming method, image forming apparatus, developer and toner cartridge containing the toner.
    Type: Grant
    Filed: May 20, 2011
    Date of Patent: March 20, 2012
    Assignee: Ricoh Company Limited
    Inventors: Ryota Inoue, Shigeru Emoto, Naohiro Watanabe, Masahide Yamada, Akinori Saitoh, Masahiro Ohki, Tsunemi Sugiyama, Shinichi Wakamatsu, Takayuki Yoshii, Eiji Sawamura
  • Publication number: 20110223530
    Abstract: A toner is provided including a binder resin and a wax having primarily C—H and C—C bonds, and having a melting point of 50 to 90° C., wherein the wax is present in a surface portion of the toner in an amount of from 0.1 to 4.0% by weight, wherein the amount of the wax is determined by Fourier transform infrared spectroscopy attenuated total reflectance (FTIR-ATR); and the use of the toner in an image forming method, image forming apparatus, developer and toner cartridge containing the toner.
    Type: Application
    Filed: May 20, 2011
    Publication date: September 15, 2011
    Inventors: Ryota Inoue, Shigeru Emoto, Naohiro Watanabe, Masahide Yamada, Akinori Saitoh, Masahiro Ohki, Tsunemi Sugiyama, Shinichi Wakamatsu, Takayuki Yoshii, Eiji Sawamura
  • Patent number: 7989131
    Abstract: A toner is provided including a binder resin and a wax having primarily C—H and C—C bonds, and having a melting point of 50 to 90° C., wherein the wax is present in a surface portion of the toner in an amount of from 0.1 to 4.0% by weight, wherein the amount of the wax is determined by Fourier transform infrared spectroscopy attenuated total reflectance (FTIR-ATR); and the use of the toner in an image forming method, image forming apparatus, developer and toner cartridge containing the toner.
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: August 2, 2011
    Assignee: Ricoh Company Limited
    Inventors: Ryota Inoue, Shigeru Emoto, Naohiro Watanabe, Masahide Yamada, Akinori Saitoh, Masahiro Ohki, Tsunemi Sugiyama, Shinichi Wakamatsu, Takayuki Yoshii, Eiji Sawamura
  • Patent number: 7643784
    Abstract: A fixing apparatus including at least one transfer and fixing member which is placed in contact with an image carrier and a recording medium and configured to transfer and fix an image on the image carrier to the recording medium, at least detection mechanism configured to detect a jam generated on the recording medium, a separation mechanism configured to contact the transfer and fixing member with and separate from the transfer and fixing member from the image carrier or recording medium, the separation mechanism being configured to separate the transfer and fixing member from the image carrier or recording medium when the jam on the recording medium is detected by the detection mechanism.
    Type: Grant
    Filed: February 28, 2006
    Date of Patent: January 5, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Tsuneaki Kondoh, Takayuki Yoshii, Michitaka Higaki, Kohji Kamiya, Eiji Sawamura
  • Patent number: 7628858
    Abstract: A coating film forming apparatus, which applies a paint to an outer circumferential face of an object to be coated to form a coating film, the coating film forming apparatus, includes: a retention section which retains the coated object in a state in which the outer circumferential face is exposed and in which an axial core of the coated object is in parallel with a vertical direction; an applying nozzle formed in an annular shape, arranged to oppose the outer circumferential face and to have an interval therebetween, and coaxially arranged with the coated object retained by the retention section, the applying nozzle having a first slit, which discharges the paint to an inner circumferential face formed throughout a whole circumference thereof; a movement section, which relatively moves the retention section and the applying nozzle along the axial core; a paint supply section which supplies the paint to the applying nozzle; and a gaseous body discharger which discharges a gaseous body toward the paint dischar
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: December 8, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Michitaka Higaki, Takayuki Yoshii, Satoshi Tohkai
  • Publication number: 20090256747
    Abstract: A variable directivity antenna (2) has directivity direction angularly variable stepwise about itself. A tuner (8) selects a desired one from high frequency signals received at the antenna (2). The tuner (8) detects the level of the received signal and supplies it to a control unit (10). The control unit (10) searches for received signal levels, equal to or higher than a threshold level, of the received signal received in plural states in which the directivity of the antenna (2) is placed in different ones of directivity directions, and detects a slope of the received signal levels within a frequency range of the received signal. The control unit (10) employs the searched directivity direction for the smallest one of the detected slopes as the direction to which the antenna (2) is directed to receive the signal.
    Type: Application
    Filed: April 10, 2009
    Publication date: October 15, 2009
    Applicant: DX ANTENNA COMPANY, LIMITED
    Inventors: Eiji Shibuya, Takayuki Yoshii
  • Publication number: 20090219207
    Abstract: A variable directivity antenna (2) has directivity direction variable stepwise along the circumference of a circle centered about it. A tuner (8) selects a desired one from high frequency signals received at the antenna (2). The tuner (8) detects the level of the received signal and supplies it to a control unit (10). The control unit (10) searches for reception signal levels, equal to or higher than a threshold level, of the received signal received in antenna states in which the directivity of the antenna (2) is placed in different ones of directivity directions, and detects a signal-to-noise ratio of the signal received from directions adjacent to each of the searched directivity directions corresponding to the searched signal levels. The control unit (10) employs the searched directivity direction for the highest signal-to-noise ratio as the direction to which the antenna (2) is directed to receive the signal.
    Type: Application
    Filed: February 2, 2009
    Publication date: September 3, 2009
    Applicant: DX Antenna Company, Limited
    Inventors: Eiji Shibuya, Takayuki Yoshii
  • Patent number: 7480478
    Abstract: An image forming apparatus includes a fixing unit for fixing a toner image on a recording sheet. The fixing unit includes a fixing belt, a support roller, and a coil. The fixing belt rotates and applies heat on the recording sheet to fix the toner image on the recording sheet. The support roller rotates and supports the fixing belt. The coil has a loop-like or U-like shape and generates a magnetic flux to induce heat in the fixing belt and the support roller. The coil sandwiches the support roller and the fixing belt in a manner that the coil faces an outer circumferential surface of the support roller via the fixing belt and an inner circumferential surface of the support roller. The above configuration of the coil controls a surface temperature of the fixing belt.
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: January 20, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Norihiko Aze, Motokazu Hasegawa, Eiji Sawamura, Takayuki Yoshii
  • Publication number: 20090015476
    Abstract: A variable directivity antenna apparatus (1) includes an output terminal (40) at which reception signals transmitted through a coaxial cable (42) are outputted. The directivity pattern of the antenna apparatus (1) is varied in response to a directivity control signal supplied to the output terminal (40) through the coaxial cable (42). The variable directivity antenna apparatus (1) further includes changeover switches (8, 12, 14, 22, 32, 34, 38) operated to fix the orientation of directivity in a predetermined direction in response to the coupling of a power supply adapter (64).
    Type: Application
    Filed: July 8, 2008
    Publication date: January 15, 2009
    Applicant: DX ANTENNA COMPANY, LIMITED
    Inventors: Eiji Shibuya, Kiyotaka Tatekawa, Takayuki Yoshii
  • Publication number: 20080311293
    Abstract: A method and a device for coating a hollow cylindrical member. The method includes radially coating an entire inner surface of the hollow cylindrical member with a first coating material discharged by a first slit nozzle and simultaneously circularly coating an entire outer surface of the hollow cylindrical member with a second coating material discharged in an axial direction of the hollow cylindrical member by a second slit nozzle located opposite the first slit nozzle with the hollow cylindrical member therebetween. The first slit nozzle and the second slit nozzle discharge the first coating material and the second coating material, respectively, to a same height of the hollow cylindrical member relative to the inner surface and the outer surface thereof.
    Type: Application
    Filed: June 9, 2008
    Publication date: December 18, 2008
    Inventors: Michitaka Higaki, Takayuki Yoshii, Tsuneaki Kondoh, Kohji Kamiya, Hidenori Machida, Satoshi Tohkai
  • Patent number: 7458253
    Abstract: In a method for evaluating a fixing member to fix a toner having a surface layer, a hardness test is carried out by applying a pressure deformation from the surface side of the fixing member, and when a deformation of the surface layer by the pressure deformation is within an elastic range, the fixing member is regarded as a standard product.
    Type: Grant
    Filed: February 1, 2006
    Date of Patent: December 2, 2008
    Assignee: Ricoh Company, Ltd.
    Inventors: Norihiko Aze, Kyoichi Ashikawa, Kohji Kamiya, Minoru Matsuo, Takayuki Yoshii, Nozomu Takahata
  • Publication number: 20080156259
    Abstract: A coating film forming apparatus, which applies a paint to an outer circumferential face of an object to be coated to form a coating film, the coating film forming apparatus, includes: a retention section which retains the coated object in a state in which the outer circumferential face is exposed and in which an axial core of the coated object is in parallel with a vertical direction; an applying nozzle formed in an annular shape, arranged to oppose the outer circumferential face and to have an interval therebetween, and coaxially arranged with the coated object retained by the retention section, the applying nozzle having a first slit, which discharges the paint to an inner circumferential face formed throughout a whole circumference thereof; a movement section, which relatively moves the retention section and the applying nozzle along the axial core; a paint supply section which supplies the paint to the applying nozzle; and a gaseous body discharger which discharges a gaseous body toward the paint dischar
    Type: Application
    Filed: December 27, 2007
    Publication date: July 3, 2008
    Inventors: Michitaka Higaki, Takayuki Yoshii, Satoshi Tohkai
  • Publication number: 20080063444
    Abstract: In a fixing member having an elastic layer of heat resistance rubber provided on a substrate and a separation layer of fluorocarbon resin provided on the elastic layer, the fluorocarbon resin is that a tensile strength of a 30 ?m coating film burned at 340° C. is equal or greater than 25 MPa. The heat resistance rubber includes, for example, silicone rubber or fluorosilicone rubber as a major component. The fluorocarbon resin includes PFA as a major component, for example.
    Type: Application
    Filed: October 23, 2007
    Publication date: March 13, 2008
    Inventors: Tsuneaki Kondoh, Kyoichi Ashikawa, Takuzo Kurachi, Norihiko Aze, Kohji Kamiya, Takayuki Yoshii, Nozomu Takahata, Atsushi Ishibe, Hidenori Machida
  • Publication number: 20080063443
    Abstract: An image forming apparatus includes a fixing unit for fixing a toner image on a recording medium. In at least one embodiment, the fixing unit includes a fixing member configured to heat and melt a toner. Further, in at least one embodiment, the fixing member has a surface contacting the toner image and includes a wettability not greater than 38 mN/m.
    Type: Application
    Filed: September 10, 2007
    Publication date: March 13, 2008
    Inventors: Hiroshi Yoshinaga, Takayuki Yoshii, Kohji Kamiya, Masanao Ehara
  • Publication number: 20070215045
    Abstract: The present invention is directed to a coating film forming apparatus 1. The apparatus 1 includes a coating unit 11, a coating material supply unit 10, and a control unit 12. The coating unit 11 contains a holding unit 18 for holding a substrate 4, a coating nozzle 19, and a movable unit 20. The coating nozzle 19 is provided with a slit for discharge coating material to an inner circumferential surface, formed in annular shape. The movable unit 20 moves the coating nozzle 19 along a shaft center P of the substrate 4. The control unit 12 controls to apply coating material 7 to an outer circumferential surface 4c of the substrate 4 from a lower end 4a upward in order.
    Type: Application
    Filed: March 16, 2007
    Publication date: September 20, 2007
    Inventors: Michitaka HIGAKI, Takayuki Yoshii, Yasuomi Mikami, Kentaroh Yajima
  • Publication number: 20070059626
    Abstract: A toner is provided including a binder resin and a wax having primarily C—H and C—C bonds, and having a melting point of 50 to 90° C., wherein the wax is present in a surface portion of the toner in an amount of from 0.1 to 4.0% by weight, wherein the amount of the wax is determined by Fourier transform infrared spectroscopy attenuated total reflectance (FTIR-ATR); and the use of the toner in an image forming method, image forming apparatus, developer and toner cartridge containing the toner.
    Type: Application
    Filed: September 13, 2006
    Publication date: March 15, 2007
    Inventors: Ryota Inoue, Shigeru Emoto, Naohiro Watanabe, Masahide Yamada, Akinori Saitoh, Masahiro Ohki, Tsunemi Sugiyama, Shinichi Wakamatsu, Takayuki Yoshii, Eiji Sawamura
  • Patent number: 7146126
    Abstract: A fixing member includes a base member and an outermost layer located overlying the base member and having different fluororesins to fix a toner onto a sheet.
    Type: Grant
    Filed: March 18, 2005
    Date of Patent: December 5, 2006
    Assignee: Ricoh Company, Limited
    Inventors: Takayuki Yoshii, Tsuneaki Kondoh, Kohji Kamiya
  • Publication number: 20060198666
    Abstract: A fixing apparatus including at least one transfer and fixing member which is placed in contact with an image carrier and a recording medium and configured to transfer and fix an image on the image carrier to the recording medium, at least detection mechanism configured to detect a jam generated on the recording medium, a separation mechanism configured to contact the transfer and fixing member with and separate from the transfer and fixing member from the image carrier or recording medium, the separation mechanism being configured to separate the transfer and fixing member from the image carrier or recording medium when the jam on the recording medium is detected by the detection mechanism.
    Type: Application
    Filed: February 28, 2006
    Publication date: September 7, 2006
    Inventors: Tsuneaki Kondoh, Takayuki Yoshii, Michitaka Higaki, Kohji Kamiya, Eiji Sawamura