Patents by Inventor Takeshi Yokoyama

Takeshi Yokoyama 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: 7370955
    Abstract: The ultraviolet ray irradiation device 9 comprises the cover member 16 to cover the ultraviolet ray light source 15, and an ultraviolet ray reflectance of a surface which is an inner surface of the cover member 16 and reflects the ultraviolet ray radiated from the ultraviolet ray light source 15 to the recording head 6 is made to be lower than an ultraviolet ray reflectance of the other surface.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: May 13, 2008
    Assignee: Konica Minolta Holdings, Inc.
    Inventors: Takeshi Yokoyama, Koji Matsushima
  • Publication number: 20080075223
    Abstract: A radioactive-material container includes a container body that shields nuclear radiation, which includes a cavity that stores a basket containing a recycle fuel assembly, a lid that covers the cavity, and a metal gasket that includes a sealing area that makes a physical contact with the container body and the lid. The sealing area has a specific shape that disperses tightening stress acting on the metal gasket for a sealing.
    Type: Application
    Filed: July 8, 2004
    Publication date: March 27, 2008
    Inventors: Katsunari Ohsono, Takeshi Yokoyama, Kazuo Asada, Tadashi Kimura, Yasuhiro Sakaguchi, Shinji Ookame, Masaharu Minami
  • Publication number: 20080068431
    Abstract: Disclosed an ink jet recording apparatus for recording images in a recording medium having an ink absorbability, including: a recording head including a nozzle for jetting a photocurable ink onto the recording medium; and a light irradiation device to apply light to the photocurable ink landed on the recording medium, wherein: the light irradiation device includes a first light source to emit light having a first emission spectrum, and a second light source to emit light having a second emission spectrum whose peak wavelength is shorter than a peak wavelength of the first emission spectrum, and the first and second light sources are arranged so that the first light source irradiates the photocurable ink landed on the recording medium and thereafter the second light source irradiates the photocurable ink.
    Type: Application
    Filed: September 20, 2007
    Publication date: March 20, 2008
    Applicant: KONICA MINOLTA MEDICAL & GRAPHIC, INC.
    Inventor: Takeshi Yokoyama
  • Patent number: 7316476
    Abstract: An image recording apparatus, having: a recording head which discharges a photo curable ink which is cured by photo irradiation; a plurality of light irradiating devices which irradiate the photo irradiation to the photo curable ink on a recording medium and each of which includes a light source; a detector which detects an illumination intensity of each of the light irradiating devices; a first judgment section which judges whether the illumination intensity of each of the light irradiating devices is less than a first illumination intensity based on a result of detection by the detector or not; and a controller which controls an energy of the photo irradiation for the photo curable ink in accordance with a detected illumination intensity less than the first illumination intensity, when the first judgment section judges one of the light irradiating devices having an illumination intensity less than the first illumination intensity exists.
    Type: Grant
    Filed: January 12, 2005
    Date of Patent: January 8, 2008
    Assignee: Konica Minolta Holdings, Inc.
    Inventor: Takeshi Yokoyama
  • Publication number: 20070290782
    Abstract: A micro power converter is provided in which magnetic flux passing a route outside of external electrodes and second connection conductors is decreased to reduce noises, and at the same time, adhesiveness of molding resin is preserved to provide excellent humidity resistance.
    Type: Application
    Filed: June 20, 2007
    Publication date: December 20, 2007
    Applicant: FUJI ELECTRIC DEVICE TECHNOLOGY CO., LTD.
    Inventors: Takeshi YOKOYAMA, Yoshikiyo USUI
  • Patent number: 7249836
    Abstract: An ink jet printer has a recording head, having a nozzle, for jetting ink to be cured by irradiating with an ultraviolet ray from the nozzle, and an ultraviolet ray irradiating device for irradiating the ink jetted by the recording head with a plurality of ultraviolet rays. The ultraviolet ray irradiating device has a plurality of ultraviolet ray sources respectively emitting a plurality of ultraviolet rays of a plurality of light emitting wavelength peaks different from one another. After the ink jetted from the nozzle arrives at a recording medium, an image is formed by irradiating the ink of the recording medium with the ultraviolet rays of the ultraviolet ray irradiating device and curing the ink.
    Type: Grant
    Filed: December 9, 2003
    Date of Patent: July 31, 2007
    Assignee: Konica Minolta Holdings, Inc.
    Inventor: Takeshi Yokoyama
  • Patent number: 7237889
    Abstract: There is provided an ink-jet recording apparatus that can maintain a constant light emission intensity of a light source with a simple structure, and allows easy replacement of the light source, while realizing miniaturization and reduction in weight of the apparatus. The ink-jet recording apparatus includes a recording head to jet photocurable ink onto a recording medium, wherein the photocurable ink is cured by being exposed to light; and a light emitting device having a light source to emit light to cure the photocurable ink, the light source including a light emitting tube and metal caps provided at both ends of the light emitting tube, wherein the light emitting tube has a bent section.
    Type: Grant
    Filed: September 20, 2004
    Date of Patent: July 3, 2007
    Assignee: Konica Minolta Medical & Graphic, Inc.
    Inventors: Yoshiyuki Suzuki, Takeshi Yokoyama
  • Patent number: 7222953
    Abstract: An ink jet recording apparatus having a recording head that jets photo-hardening ink which is hardened when it is exposed to ultraviolet rays on a recording medium, a radiation apparatus equipped with a light source that radiates ultraviolet rays to jetted ink, a cooling device that cools the radiation apparatus, a temperature detector that detects a temperature of the radiation apparatus and a controller that controls temperature of the cooling device depending on the temperature detected by the temperature detector.
    Type: Grant
    Filed: September 16, 2004
    Date of Patent: May 29, 2007
    Assignee: Konica Minolta Medical & Graphic, Inc.
    Inventor: Takeshi Yokoyama
  • Publication number: 20070098124
    Abstract: A modulated pulse wave requires a pulse width of 1 nsec or less, but it is difficult that a PIN diode, which is conventionally used treats such a modulated pulse wave with narrow pulse width. In order to solve such a problem, it is an object to provide a pulse modulator, which outputs a modulated pulse wave with narrow pulse width and a pulse wave radar device, which can output a modulated pulse wave with narrow pulse width. In order to achieve this operation, the pulse modulator and the pulse wave radar device of the present invention differentiate a pulse from a pulse generating circuit so as to generate a differentiated wave with narrow width, and switch an oscillated wave from an oscillating circuit according to the differentiated wave so as to output a modulated pulse wave with narrow pulse width.
    Type: Application
    Filed: February 16, 2005
    Publication date: May 3, 2007
    Applicant: TDK Corporation
    Inventors: Hitoyoshi Kurata, Takeshi Yokoyama
  • Publication number: 20070070162
    Abstract: An object of the present invention is to provide an ink jet recording apparatus and a recording method that can prevent jetting defect, due to ink that adhered to recording head being cured, and conduct image recording with high resolution, by suppressing light that reaches the recording head to a required limit. The ink jet recording apparatus includes recording head to jet photo-curable ink on recording medium, ultraviolet ray irradiating device to irradiate ultraviolet ray to the ink jetted from the recording head, width detecting sensor to detect recording region, and control part to control the ultraviolet ray irradiating device to suppress amount of light that is irradiated from the ultraviolet ray irradiating device and rounds into the recording head side, to an extent so that the ink is not cured, in a region other than the recording region detected by the width detecting sensor.
    Type: Application
    Filed: September 20, 2006
    Publication date: March 29, 2007
    Applicant: Konica Minolta Medical & Graphic, Inc.
    Inventor: Takeshi Yokoyama
  • Patent number: 7178913
    Abstract: An ink jet recording apparatus comprises: an ink jet type of a recording head in which ink jet openings for jetting a photo curing ink are arranged so as to face a recording medium; a light source which is set so as to be opposite to a face of the recording medium to which ink is jetted, and which irradiates a light for curing the ink after the ink is jetted; a light intensity measuring section for measuring a light intensity of the light irradiated from the light source; a temperature measuring section for measuring an ambient temperature of the light intensity measuring section; and a light source control section for correcting a measured light intensity of the light source in accordance with measurement results from the light intensity measuring section and the temperature measuring section.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: February 20, 2007
    Assignee: Konica Minolta Medical & Graphic, Inc.
    Inventors: Kouichi Kumamoto, Yoshihide Hoshino, Takeshi Yokoyama
  • Patent number: 7145500
    Abstract: A pulse wave radar device controls an amplification degree of a receiving circuit, downward at a time of measuring an object at a short distance immediately after transmission of a transmitting pulse wave and upward, at a time of measuring the object at a long distance, by increasing the amplification degree of the receiving circuit progressively with the lapse of time after the transmission of the transmitting pulse wave.
    Type: Grant
    Filed: August 30, 2005
    Date of Patent: December 5, 2006
    Assignee: TDK Corporation
    Inventors: Hiroshi Ikeda, Hideaki Shimoda, Takeshi Yokoyama
  • Patent number: 7137695
    Abstract: An inkjet recording apparatus, including: a recording head for jetting ultraviolet ray curable ink onto a recording medium; an ultraviolet ray emitting device; a light source which emits ultraviolet rays; a first reflecting section for reflecting the ultraviolet rays; and a second reflecting section which is installed within the first reflecting section at an angle for preventing the ultraviolet rays from approaching the ultraviolet ray curable ink in the recording head, and behind the second reflecting section, a space for trapping stray ultraviolet rays diffused from the recording medium is formed.
    Type: Grant
    Filed: September 21, 2004
    Date of Patent: November 21, 2006
    Assignee: Konica Minolta Medical & Graphics, Inc.
    Inventor: Takeshi Yokoyama
  • Publication number: 20060238071
    Abstract: A motor production line for producing a stator includes a press station for forming a stator core by feed therethrough of a long steel plate to punch therefrom a plurality of plates assembled into a stator core, and a stator assembling station for assembling a stator including the stator core. A stator core conveyer is arranged between the stator station and the press station to successively and directly convey the stator cores formed at the press station to the stator assembling station. Preferably, the production line further includes a rotor assembling station, and a rotor core conveyer for successively and directly conveying rotor cores formed at the press station to the rotor assembling station.
    Type: Application
    Filed: March 31, 2004
    Publication date: October 26, 2006
    Inventors: Yoshiyuki Kawasaki, Tooru Kuroyanagi, Takeshi Yokoyama
  • Patent number: 7083252
    Abstract: An ink jet printer includes a carriage having a recording head for jetting ultraviolet curable ink and an ultraviolet irradiating device for curing an ink jetted on the recording medium with irradiation of ultraviolet rays such that an image is formed by scanning the carriage; and a maintenance unit for performing maintenance on the recording head at predetermined timing. It also includes a control section for controlling the maintenance unit so as to be converted to a masking state which becomes a head maintenance disabling state when an image is formed, and for controlling the maintenance unit so as to be converted to a non-masking state which becomes a head maintenance enabling state after securing a non-irradiating state in which the ultraviolet rays are not irradiated on the maintenance unit, by a function provided by a unit other than the maintenance unit when the head maintenance is performed.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: August 1, 2006
    Assignee: Konica Minolta Medical & Graphics, Inc.
    Inventors: Takeshi Yokoyama, Kouichi Kumamoto, Satoshi Nishino
  • Patent number: 7064470
    Abstract: A three-phase motor having a stator in which the dimensions of protrusion of coil end parts in winding coils of individual phases can be equalized as much as possible and in which the overall dimension of protrusion of the coil end parts in the winding coils of the three phases can be reduced to an optimal dimension is provided. Each of unipolar coils forming the winding coils of the three phases has a pair of coil end parts protruding from end parts in the axial direction of a stator core. The winding coils of the three phases have the relationships of Cv/Cu=0.88 to 0.98 and Cw/Cv=0.88 to 0.98, where Cu, Cv, Cw represent average lengths of electric wires forming the coil end parts in the three phases of U-phase, V-phase and W-phase.
    Type: Grant
    Filed: May 19, 2004
    Date of Patent: June 20, 2006
    Assignee: Aisin AW Co., Ltd.
    Inventors: Takeshi Yokoyama, Yoshiyuki Kawasaki, Shingo Hashimoto, Tooru Kuroyanagi
  • Publication number: 20060066473
    Abstract: To achieve a purpose of accurately detecting a distance to a target even in a close range, a pulse wave radar device according to the present invention cuts off an output of a demodulation circuit so that no of receiving pulse may be detected, during a period when a transmitting pulse wave output from a transmitting antenna or a transmitting pulse output from a pulse generation circuit is leaking to a receiving antenna or a receiving circuit.
    Type: Application
    Filed: September 22, 2005
    Publication date: March 30, 2006
    Applicant: TDK Corporation
    Inventors: Takeshi Yokoyama, Hitoyoshi Kurata, Tomohiro Honya, Yoshinari Yamashita
  • Publication number: 20060044180
    Abstract: An in-vehicle pulse wave radar device is required to detect an object in a wide range of several tens of centimeters to several tens of meters and therefore the receiving circuit requires an amplification circuit having a wide dynamic range covering the receiving pulse waves of both a large signal level and a small signal level. The pulse wave radar device according to the invention controls the amplification degree of the receiving circuit downward at the time of measuring an object at a short distance immediately after transmission of the transmitting pulse wave and upward with time for measuring an object at a long distance by increasing the amplification degree of the receiving circuit progressively with the elapse of time after transmission of the transmitting pulse wave.
    Type: Application
    Filed: August 30, 2005
    Publication date: March 2, 2006
    Applicant: TDK Corporation
    Inventors: Hiroshi Ikeda, Hideaki Shimoda, Takeshi Yokoyama
  • Publication number: 20060023045
    Abstract: The ultraviolet ray irradiation device 9 comprises the cover member 16 to cover the ultraviolet ray light source 15, and an ultraviolet ray reflectance of a surface which is an inner surface of the cover member 16 and reflects the ultraviolet ray radiated from the ultraviolet ray light source 15 to the recording head 6 is made to be lower than an ultraviolet ray reflectance of the other surface.
    Type: Application
    Filed: December 12, 2003
    Publication date: February 2, 2006
    Applicant: KONICA MINOLTA HOLDINGS, INC.
    Inventors: Takeshi Yokoyama, Koji Matsushima
  • Publication number: 20050253913
    Abstract: An inkjet recording apparatus includes a recording head formed with nozzles for jetting light curable ink onto a recording medium, a light irradiator having a light source for emitting light to cure the ink, and an illuminance detecting device for intermittently detecting an illuminance of the light emitted from the light source, at a predetermined interval. The inkjet recording apparatus further includes a temperature adjusting device for adjusting a temperature of the light source, and a control section for determining that the ink cannot be cured, if the illuminance detected by the illuminance detecting device is not higher than a reference value in a condition where the temperature of the light source has been adjusted into a predetermined range by the temperature adjusting device.
    Type: Application
    Filed: May 3, 2005
    Publication date: November 17, 2005
    Applicant: Konica Minolta Medical & Graphic, Inc.
    Inventors: Takeshi Yokoyama, Koji Matsushima