Patents by Inventor Keigo Nakamura

Keigo Nakamura 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).

  • Publication number: 20170246083
    Abstract: An object of the present invention is to automatically identify a direction, a posture and characteristics such as a shape, a size, a type and an expiration date of a medicine and store the medicine with ensuring a high degree of freedom. A medicine supplying apparatus 1 includes an identifying part and a storing part. A storing area is defined at the time of storing the medicine according to a size of a medicine contained in characteristics of the medicine identified by the identifying part. The medicine is stored in the storing part in a state that identification information of the medicine is associated with the storing area. Further, the medicine supplying apparatus has a determination processing part which can determine whether or not the medicine is a target to be treated based on the characteristics of the medicine identified by the identifying part.
    Type: Application
    Filed: May 8, 2015
    Publication date: August 31, 2017
    Applicant: YUYAMA MFG. CO., LTD.
    Inventors: Hirokazu AMANO, Akitomi KOHAMA, Masatoshi WARASHINA, Junichi IWAYA, Hiromichi TSUDA, Takashi UENO, Hidenori TSUJI, Keigo NAKAMURA, Mei ZHANG
  • Publication number: 20170235258
    Abstract: An improved image forming apparatus includes an image bearer, a nip forming member, a transfer power source, and a controller. The controller switches a transfer mode between a first mode to transfer the toner image onto a first type sheet having a surface smoothness higher than a surface smoothness of a second type sheet and a second mode to transfer the toner image onto the second type sheet. The controller controls the transfer power source to output the transfer bias having an opposite-peak duty of greater than or equal to 50% that is a duty on the side of the opposite-peak value in the first mode. The controller controls the transfer power source to output the transfer bias having an opposite-peak duty of less than 50%, which is different from the opposite-peak duty of the first mode, in the second mode.
    Type: Application
    Filed: February 8, 2017
    Publication date: August 17, 2017
    Inventors: Yuuji WADA, Naoto KOCHI, Hiroki NAKAMATSU, Kazuki YOGOSAWA, Takahiro SUZUKI, Shinya TANAKA, Kenji SUGIURA, Naohiro KUMAGAI, Seiichi KOGURE, Junpei FUJITA, Hirokazu ISHII, Takehide MIZUTANI, Atsushi NAGATA, Keigo NAKAMURA
  • Publication number: 20170146931
    Abstract: An image forming apparatus includes a transfer member configured to abut against an image carrier for carrying a toner image to form a transfer nip; and a power supply configured to output a bias voltage for transferring the toner image on the image carrier onto a recording medium nipped in the transfer nip. The bias voltage includes a first voltage for transferring the toner image from the image carrier onto the recording medium in a transfer direction and a second voltage having an opposite polarity of the first voltage, the first and the second voltages being alternately output. A time-averaged value of the bias voltage is set to a polarity in the transfer direction and is set in the transfer direction side with respect to a median between a maximum and a minimum of the bias voltage.
    Type: Application
    Filed: December 23, 2016
    Publication date: May 25, 2017
    Inventors: Shinya TANAKA, Naomi Sugimoto, Haruo Iimura, Shinji Aoki, Yasuhiko Ogino, Kazuchika Saeki, Keigo Nakamura
  • Patent number: 9658579
    Abstract: An image forming apparatus includes an image bearer to bear a toner image, a toner image forming device to form the toner image on the image bearer, a nip forming device to contact the image bearer to form a transfer nip between the image bearer and the nip forming device, a transfer bias output device to output a transfer bias including a DC component and an AC component to transfer the toner image from the image bearer onto a recording medium interposed in the transfer nip, and a controller operatively connected to the transfer bias output device to adjust a frequency f of the AC component of the transfer bias in accordance with an image area ratio A such that the frequency f is at its minimum with a predetermined image area ratio Amin %, where Amin % is greater than 0 but lower than an image area ratio of a solid image.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: May 23, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Keigo Nakamura, Haruo Iimura, Shinji Aoki
  • Patent number: 9563153
    Abstract: An image forming apparatus includes a transfer member configured to abut against an image carrier for carrying a toner image to form a transfer nip; and a power supply configured to output a bias voltage for transferring the toner image on the image carrier onto a recording medium nipped in the transfer nip. The bias voltage includes a first voltage for transferring the toner image from the image carrier onto the recording medium in a transfer direction and a second voltage having an opposite polarity of the first voltage, the first and the second voltages being alternately output. A time-averaged value of the bias voltage is set to a polarity in the transfer direction and is set in the transfer direction side with respect to a median between a maximum and a minimum of the bias voltage.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: February 7, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinya Tanaka, Naomi Sugimoto, Haruo Iimura, Shinji Aoki, Yasuhiko Ogino, Kazuchika Saeki, Keigo Nakamura
  • Patent number: 9535375
    Abstract: An image forming apparatus includes a transfer bias output device and an information receiving device. The transfer bias output device outputs a transfer bias including a superimposed bias composed of an AC bias superimposed on a DC bias to form a transfer electric field in a transfer nip between an image bearing member bearing a toner image and a nip forming member, to transfer the toner image onto a recording medium in the transfer nip. A controller operatively connected to the information receiving device and the transfer bias output device causes the transfer bias output device to change a target output of a peak-to-peak voltage of the AC bias based on information received by the information receiving device that affects transfer of the toner image and to reduce a target output of the DC bias as the target output value of the peak-to-peak voltage of the AC bias increases.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: January 3, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinya Tanaka, Hirokazu Ishii, Yasunobu Shimizu, Keigo Nakamura
  • Patent number: 9488937
    Abstract: An image forming apparatus includes an image carrier that carries an electrostatic latent image; a developing unit that develops the electrostatic latent image using a toner; an intermediate transfer body onto which toner image is transferred; a secondary transfer member that comes in contact with a surface of the intermediate transfer body; a power supply that outputs a voltage for transferring the toner image on the intermediate transfer body onto a recording member; and a protective agent supply unit that applies a protective agent including zinc stearate and boron nitride onto a surface of the image carrier. The voltage is alternatively switched in a transfer direction and an opposite direction. The voltage in the transfer direction enables transfer of the toner image from the intermediate transfer body to the recording member, and the voltage in the opposite direction has polarity opposite to polarity of the voltage in the transfer direction.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: November 8, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Shinya Tanaka, Hirokazu Ishii, Hiromi Ogiyama, Yasunobu Shimizu, Keigo Nakamura
  • Patent number: 9456788
    Abstract: At least one of the common regions in time-sequence images is specified. Then, the time-sequence images are adjusted such that the position of that common region in at least one image among the time-sequence images is adjusted to the position of that common region in a different image. Then, the new adjusted time-sequence images are subjected to video compression processing.
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: October 4, 2016
    Assignee: FUJIFILM CORPORATION
    Inventors: Jun Masumoto, Yuanzhong Li, Yoshinori Itai, Yasunori Ohta, Yoshinao Fujimori, Keigo Nakamura
  • Patent number: 9454107
    Abstract: A novel image forming apparatus includes a photoreceptor to bear an electrostatic latent image on a surface thereof, a developing device to develop the electrostatic latent image into a toner image, an intermediate transfer member onto which the electrostatic latent image is transferred, a primary transfer member to apply a primary transfer bias to the intermediate transfer member to transfer the toner image thereto, a secondary transfer member supplied with a secondary transfer bias to transfer the toner image from the intermediate transfer member onto a recording medium, and a transfer bias power source to selectively apply to the secondary transfer member one of a secondary transfer bias consisting of a direct current (DC) voltage in a DC transfer mode and a secondary transfer bias consisting of a superimposed bias in which an alternating voltage is superimposed on a DC voltage.
    Type: Grant
    Filed: June 14, 2013
    Date of Patent: September 27, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasunobu Shimizu, Shinya Tanaka, Hirokazu Ishii, Keigo Nakamura
  • Publication number: 20160210744
    Abstract: A first concentration range, which is a concentration range of a region of interest, and an output concentration range are determined in an input image. A compression table for compressing a dynamic range of the input image is generated on the basis of the first concentration range and the output concentration range. The first concentration range is changed at a predetermined ratio with respect to the changed output concentration range to determine a second concentration range. A new compression table is generated on the basis of the changed output concentration range and the second concentration range. The dynamic range of the input image is compressed using the new compression table.
    Type: Application
    Filed: March 28, 2016
    Publication date: July 21, 2016
    Applicant: FUJIFILM Corporation
    Inventors: Keigo NAKAMURA, Tomoyuki TAKAHASHI
  • Patent number: 9375133
    Abstract: A virtual field of view of a virtual endoscope, which is positioned at a position corresponding to a detected position of an endoscope in a 3D medical image, is determined based on a position of a structure of interest, the corresponding position and a posture of the endoscope, and an angle of view of the endoscope, such that the position of the structure of interest is contained within the virtual field of view and the virtual field of view has continuity with the field of view of the endoscope. From the 3D medical image inputted, a virtual endoscopic image having the determined virtual field of view with the view point thereof being the corresponding position of the endoscope is generated. The generated virtual endoscopic image is displayed on a WS display.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: June 28, 2016
    Assignee: FUJIFILM CORPORATION
    Inventors: Yoshiro Kitamura, Keigo Nakamura
  • Publication number: 20160171691
    Abstract: A partial region extraction unit extracts a partial region including a distal portion in the vicinity of a boundary between a subject region including the distal portion and a void region from a radiological image including the distal portion of the human body. A designation region determination unit determines at least one of the void region and the partial region as a designation region for designating the partial region.
    Type: Application
    Filed: February 24, 2016
    Publication date: June 16, 2016
    Applicant: FUJIFILM Corporation
    Inventors: Keigo NAKAMURA, Tomoyuki TAKAHASHI
  • Publication number: 20160161889
    Abstract: An image forming apparatus includes a transfer member configured to abut against an image carrier for carrying a toner image to form a transfer nip; and a power supply configured to output a bias voltage for transferring the toner image on the image carrier onto a recording medium nipped in the transfer nip. The bias voltage includes a first voltage for transferring the toner image from the image carrier onto the recording medium in a transfer direction and a second voltage having an opposite polarity of the first voltage, the first and the second voltages being alternately output. A time-averaged value of the bias voltage is set to a polarity in the transfer direction and is set in the transfer direction side with respect to a median between a maximum and a minimum of the bias voltage.
    Type: Application
    Filed: February 17, 2016
    Publication date: June 9, 2016
    Inventors: Shinya TANAKA, Naomi SUGIMOTO, Haruo llMURA, Shinji AOKI, Yasuhiko OGINO, Kazuchika SAEKI, Keigo NAKAMURA
  • Publication number: 20160154347
    Abstract: An image forming apparatus includes a transfer bias output device and an information receiving device. The transfer bias output device outputs a transfer bias including a superimposed bias composed of an AC bias superimposed on a DC bias to form a transfer electric field in a transfer nip between an image bearing member bearing a toner image and a nip forming member, to transfer the toner image onto a recording medium in the transfer nip. A controller operatively connected to the information receiving device and the transfer bias output device causes the transfer bias output device to change a target output of a peak-to-peak voltage of the AC bias based on information received by the information receiving device that affects transfer of the toner image and to reduce a target output of the DC bias as the target output value of the peak-to-peak voltage of the AC bias increases.
    Type: Application
    Filed: February 2, 2016
    Publication date: June 2, 2016
    Inventors: Shinya TANAKA, Hirokazu ISHll, Yasunobu SHIMIZU, Keigo NAKAMURA
  • Publication number: 20160148355
    Abstract: Feature amount calculation unit determines that the diagnosis target is a bone portion of a subject, and calculates a feature amount of a density of the radiation image based on a soft region in a radiation image acquired by irradiating a photographic subject with radiation. An image processing unit performs image processing including gradation processing on the radiation image, such that the feature amount becomes the target density, to acquire a processed radiation image.
    Type: Application
    Filed: January 20, 2016
    Publication date: May 26, 2016
    Applicant: FUJIFILM Corporation
    Inventors: Keigo NAKAMURA, Tomoyuki TAKAHASHI
  • Publication number: 20160140708
    Abstract: A feature amount calculation unit calculates, based on a radiation image acquired by irradiating a photographic subject with radiation, a feature amount of a density of the radiation image. A target density calculation unit calculates, based on the radiation image, a target density for converting the feature amount. An image processing unit performs image processing including gradation processing on the radiation image, such that the feature amount becomes the target density, to acquire a processed radiation image.
    Type: Application
    Filed: January 20, 2016
    Publication date: May 19, 2016
    Applicant: FUJIFILM Corporation
    Inventors: Keigo NAKAMURA, Tomoyuki TAKAHASHI
  • Patent number: 9335674
    Abstract: According to an embodiment, provided is a transfer device including: a nip forming member that abuts against a surface of an image carrier carrying a toner image; and a transfer voltage application unit that applies a transfer voltage including a DC component and an AC component. The transfer voltage is an alternating voltage in which a supply voltage having polarity in a transfer direction and a return voltage having polarity opposite. A time average value Vave of the transfer voltage is set to be at polarity in the transfer direction and is set to be closer to a peak value Vt of the supply voltage relative to a center value Voff between a maximum and minimum value. An absolute value of the peak value Vr of the return voltage is set to be larger than an absolute value of the time average value Vave.
    Type: Grant
    Filed: June 17, 2015
    Date of Patent: May 10, 2016
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Naomi Sugimoto, Shinya Tanaka, Haruo Iimura, Shinji Aoki, Yasuhiko Ogino, Keigo Nakamura
  • Patent number: 9310722
    Abstract: [Problem to be solved] To provide an image forming apparatus for suppressing formations of white spots and achieving high quality images, while obtaining sufficient image densities in both of the recessed parts and the projected parts of a recording medium surface. [Solution] An image forming apparatus includes a transfer member 36 that abuts against a surface of an image carrier carrying a toner image and forms a transfer nip, and a power supply 39 that outputs a voltage (transfer bias) for causing the toner image on the image carrier to be transferred onto a recording medium P nipped in the transfer nip. The voltage is switched alternatingly between a transfer direction voltage for causing the toner image to be transferred from the image carrier onto the recording medium and a voltage having an opposite polarity of the transfer direction voltage when the toner image on the image carrier is to be transferred onto the recording medium.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: April 12, 2016
    Assignee: RICOH COMPANY, LIMITED
    Inventors: Shinya Tanaka, Naomi Sugimoto, Haruo Iimura, Shinji Aoki, Yasuhiko Ogino, Kazuchika Saeki, Keigo Nakamura
  • Patent number: 9291955
    Abstract: An image forming apparatus includes an image bearing member, a transfer member disposed facing the image bearing member to form a transfer region therebetween, a transfer bias application device to apply to the transfer region a transfer bias including a direct current (DC) component and an alternating current (AC) component to transfer the toner image onto the recording medium as the recording medium passes through the transfer region, and a controller operatively connected to the transfer bias application device to allow, during a bias change period in a sheet absent period in which the image bearing member rotates and no recording medium passes through the transfer region, the transfer bias application device to selectively apply to the transfer region one of the transfer bias without the AC component and the transfer bias with a peak-to-peak voltage of the AC component less than that applied in image formation.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: March 22, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Keigo Nakamura, Yasunobu Shimizu, Hiromi Ogiyama, Hirokazu Ishii, Shinya Tanaka
  • Patent number: 9291934
    Abstract: An image forming apparatus includes an image bearing member to bear a toner image on a surface thereof, a transfer device to transfer the toner image onto a recording medium, and a transfer bias power source to apply to the transfer device a superimposed transfer bias in which an alternating current (AC) component is superimposed on a direct current (DC) component in a superimposed transfer mode to transfer the toner image. The superimposed transfer bias has a waveform in which a first polarity in a direction of transferring the toner image onto the recording medium and a second polarity opposite the first polarity switch alternately. The superimposed transfer bias is output such that a standard value of each of the DC component and the AC component is multiplied by a respective correction ratio, and the correction ratio of the DC component is different from that of the AC component.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: March 22, 2016
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasunobu Shimizu, Hiromi Ogiyama, Hirokazu Ishii, Shinya Tanaka, Keigo Nakamura