Patents by Inventor Taku Kimura

Taku Kimura 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: 11072180
    Abstract: An ink tank that communicates with an ink ejecting head, includes: an ink chamber configured to house ink; an ink inlet portion that communicates with the ink chamber and that receives ink supplied from an ink supply container; and an ink viewing portion that is a portion of a wall that defines the ink chamber and that enables the ink in the ink chamber to be viewed from an outside, the ink chamber having an ink guide wall for guiding the ink from the ink inlet portion toward the ink viewing portion.
    Type: Grant
    Filed: September 17, 2019
    Date of Patent: July 27, 2021
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Tadahiro Mizutani, Taku Ishizawa, Noriyuki Fukasawa, Hideki Okumura, Naomi Kimura
  • Publication number: 20200307935
    Abstract: Provided is a sheet conveyance apparatus armored with a housing, the sheet conveyance apparatus includes: a sheet conveyor that feeds a sheet to a downstream side in a direction of conveyance; a conveyance guide that guides the sheet to be conveyed; an ultrasonic sensor that detects the sheet guided by the conveyance guide; and a shield member that is conductive, wherein the ultrasonic sensor includes: a transmitter that transmits an ultrasonic wave having a predetermined frequency; and a receiver that receives the ultrasonic wave, the transmitter and the receiver are arranged along the conveyance guide, and the shield member is disposed between the housing and the receiver in a sheet-face perpendicular direction at an ultrasonic-irradiation position of the sheet being conveyed, the shield member covering an entirety of the receiver in plan view in the sheet-face perpendicular direction.
    Type: Application
    Filed: March 30, 2020
    Publication date: October 1, 2020
    Inventors: MASAHIRO NONOYAMA, MASAHIRO KAMIYA, KATSUHIDE SAKAI, JUNICHI MASUDA, TAKU KIMURA
  • Patent number: 10787001
    Abstract: An image forming apparatus including a polygon mirror that deflects a light beam, the image forming apparatus includes: an optical sensor arranged such that the light beam deflected by the polygon mirror enters the optical sensor; and a hardware processor that measures an output level of the optical sensor and calculates, as a remaining life of the polygon mirror, an operation time of the polygon mirror to when the output level becomes a threshold value in a case of assuming that the output level ongoingly changes at a rate of change over time that is a change amount of the output level per unit operation time of the polygon mirror, using the measured output level.
    Type: Grant
    Filed: March 7, 2019
    Date of Patent: September 29, 2020
    Assignee: Konica Minolta, Inc.
    Inventors: Yutaka Yamamoto, Tatsuya Eguchi, Shigetaka Kato, Taku Kimura
  • Publication number: 20200201233
    Abstract: An image forming apparatus includes: a conveyance path that conveys a sheet; registration rollers that are arranged across the conveyance path and each comprise a nip part; a sheet locking member that locks a front end of a sheet conveyed in the conveyance path, where the sheet locking member swings between a first attitude and a second attitude, in the first attitude the sheet locking member locks the sheet on an upstream side of the nip part, and in the second attitude the sheet locking member is retracted to a downstream side of the nip part and allows the sheet to pass through the nip part; an energizer that energizes the sheet locking member to maintain the first attitude; and a hardware processor that detects deterioration of the energizer.
    Type: Application
    Filed: December 4, 2019
    Publication date: June 25, 2020
    Applicant: Konica Minolta, Inc.
    Inventors: Taku Kimura, Masahiro Kamiya, Junichi Masuda, Masahiro Nonoyama, Kouei Cho, Akimasa Ishikawa
  • Publication number: 20190308420
    Abstract: An image forming apparatus including a polygon mirror that deflects a light beam, the image forming apparatus includes: an optical sensor arranged such that the light beam deflected by the polygon mirror enters the optical sensor; and a hardware processor that measures an output level of the optical sensor and calculates, as a remaining life of the polygon mirror, an operation time of the polygon mirror to when the output level becomes a threshold value in a case of assuming that the output level ongoingly changes at a rate of change over time that is a change amount of the output level per unit operation time of the polygon mirror, using the measured output level.
    Type: Application
    Filed: March 7, 2019
    Publication date: October 10, 2019
    Applicant: Konica Minolta, Inc.
    Inventors: Yutaka YAMAMOTO, Tatsuya EGUCHI, Shigetaka KATO, Taku KIMURA
  • Patent number: 10126692
    Abstract: A power supply control device including a chopper circuit generating a heater current for a halogen heater, a current feedback circuit generating a current feedback signal indicating a current amount based on an amount of the heater current, and a constant current circuit performing pulse-width modulation of the heater current amount according to a difference between a target heater current amount and the current amount indicated by the current feedback signal. The current feedback circuit switches between methods at least including a first method and a second method for generating the current feedback signal. The current feedback signal indicates a greater current amount with the first method than with the second method, and the current feedback circuit uses the first method during a period with a predetermined time length starting from when the halogen heater is turned on, and uses the second method after elapse of the period.
    Type: Grant
    Filed: February 23, 2017
    Date of Patent: November 13, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Mikiyuki Aoki, Seiichi Kirikubo, Taku Kimura, Akinori Kimata, Takeshi Tamada
  • Patent number: 10112314
    Abstract: A post-processing apparatus includes: a moving mechanism configured to move a punching apparatus in a width direction orthogonal to a transportation direction of a sheet; and a sensor configured to optically detect a mark formed on the sheet and indicating a position to be punched. The mark is configured such that an interval in the transportation direction between a plurality of feature portions extending in the width direction is configured to be changed depending on the width direction. The moving mechanism is configured to determine a position of the punching apparatus in the width direction based on a difference between respective timings of detection of the plurality of feature portions.
    Type: Grant
    Filed: March 10, 2017
    Date of Patent: October 30, 2018
    Assignee: Konica Minolta, Inc.
    Inventors: Hiroaki Takatsu, Tatsuya Eguchi, Takeshi Ishida, Isao Watanabe, Taku Kimura
  • Patent number: 10027835
    Abstract: An image reading apparatus includes: a movable body configured to illuminate a document with light; and an apparatus body configured to wirelessly transmit power to the movable body, wherein the movable body includes receiver coils, and a feed circuit in which the receiver coils uses receiving power to supply power to a load, the apparatus body includes transmitter coils placed along a track of the receiver coils, the transmitter coils and the receiver coils are placed such that power supply efficiency of any receiver coil with the transmitter coil placed along the track of the receiver coil fluctuates, and power supply efficiency related to one receiver coil increases at a position where power supply efficiency related to the other receiver coil drops, and the feed circuit supplies power sequentially using the receiving power of the receiver coil whose power supply efficiency is increased to highest among the receiver coils.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: July 17, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Takeshi Ishida, Tatsuya Eguchi, Isao Watanabe, Hiroaki Takatsu, Taku Kimura, Atomu Nakashima
  • Patent number: 10003714
    Abstract: An image forming apparatus includes an acquiring unit configured to acquire atmosphere pressure in the installation place of the image forming apparatus, photoconductors, light sources configured to radiate laser light, and a polygon mirror configured to be rotatable. The polygon mirror exposes the photoconductors by reflecting the laser light toward the photoconductors while rotating. The image forming apparatus further includes a control device configured to control rotation of the polygon mirror. The control device outputs an enable signal for allowing the image forming apparatus to perform printing, if rotation of the polygon mirror is stabilized after start of the rotation, and advances the timing of outputting the enable signal as the atmosphere pressure increases.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: June 19, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Tatsuya Eguchi, Isao Watanabe, Takeshi Ishida, Hiroaki Takatsu, Taku Kimura, Atomu Nakashima
  • Publication number: 20180059571
    Abstract: An image forming apparatus includes an acquiring unit configured to acquire atmosphere pressure in the installation place of the image forming apparatus, photoconductors, light sources configured to radiate laser light, and a polygon mirror configured to be rotatable. The polygon mirror exposes the photoconductors by reflecting the laser light toward the photoconductors while rotating. The image forming apparatus further includes a control device configured to control rotation of the polygon mirror. The control device outputs an enable signal for allowing the image forming apparatus to perform printing, if rotation of the polygon mirror is stabilized after start of the rotation, and advances the timing of outputting the enable signal as the atmosphere pressure increases.
    Type: Application
    Filed: August 29, 2017
    Publication date: March 1, 2018
    Applicant: KONICA MINOLTA, INC.
    Inventors: Tatsuya EGUCHI, Isao WATANABE, Takeshi ISHIDA, Hiroaki TAKATSU, Taku KIMURA, Atomu NAKASHIMA
  • Publication number: 20170374217
    Abstract: An image reading apparatus includes: a movable body configured to illuminate a document with light; and an apparatus body configured to wirelessly transmit power to the movable body, wherein the movable body includes receiver coils, and a feed circuit in which the receiver coils uses receiving power to supply power to a load, the apparatus body includes transmitter coils placed along a track of the receiver coils, the transmitter coils and the receiver coils are placed such that power supply efficiency of any receiver coil with the transmitter coil placed along the track of the receiver coil fluctuates, and power supply efficiency related to one receiver coil increases at a position where power supply efficiency related to the other receiver coil drops, and the feed circuit supplies power sequentially using the receiving power of the receiver coil whose power supply efficiency is increased to highest among the receiver coils.
    Type: Application
    Filed: June 14, 2017
    Publication date: December 28, 2017
    Applicant: KONICA MINOLTA, INC.
    Inventors: Takeshi ISHIDA, Tatsuya EGUCHI, Isao WATANABE, Hiroaki TAKATSU, Taku KIMURA, Atomu NAKASHIMA
  • Publication number: 20170259447
    Abstract: A post-processing apparatus includes: a moving mechanism configured to move a punching apparatus in a width direction orthogonal to a transportation direction of a sheet; and a sensor configured to optically detect a mark formed on the sheet and indicating a position to be punched. The mark is configured such that an interval in the transportation direction between a plurality of feature portions extending in the width direction is configured to be changed depending on the width direction. The moving mechanism is configured to determine a position of the punching apparatus in the width direction based on a difference between respective timings of detection of the plurality of feature portions.
    Type: Application
    Filed: March 10, 2017
    Publication date: September 14, 2017
    Applicant: Konica Minolta, Inc.
    Inventors: Hiroaki Takatsu, Tatsuya Eguchi, Takeshi Ishida, Isao Watanabe, Taku Kimura
  • Publication number: 20170261892
    Abstract: A power supply control device including a chopper circuit generating a heater current for a halogen heater, a current feedback circuit generating a current feedback signal indicating a current amount based on an amount of the heater current, and a constant current circuit performing pulse-width modulation of the heater current amount according to a difference between a target heater current amount and the current amount indicated by the current feedback signal. The current feedback circuit switches between methods at least including a first method and a second method for generating the current feedback signal. The current feedback signal indicates a greater current amount with the first method than with the second method, and the current feedback circuit uses the first method during a period with a predetermined time length starting from when the halogen heater is turned on, and uses the second method after elapse of the period.
    Type: Application
    Filed: February 23, 2017
    Publication date: September 14, 2017
    Applicant: KONICA MINOLTA, INC.
    Inventors: Mikiyuki AOKI, Seiichi KIRIKUBO, Taku KIMURA, Akinori KIMATA, Takeshi TAMADA
  • Patent number: 9749489
    Abstract: A power control device receiving supply of power from a power source, the power control device including: a power accumulator accumulating a part of power from the power source; a first voltage converter receiving power from the power source and the power accumulator, performing voltage conversion to a first target voltage, and supplying power with the first target voltage to a first load; a second voltage converter receiving power from the first voltage converter, performing voltage conversion to a second target voltage, and supplying power with the second target voltage to a second load; a power source monitor monitoring power from the power source; and a power controller lowering the first target voltage to a level that the second voltage converter is capable of converting to the second target voltage when the power source monitor detects that the supply of power from the power source has stopped.
    Type: Grant
    Filed: April 22, 2016
    Date of Patent: August 29, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Junichi Masuda, Mikiyuki Aoki, Masahiro Nonoyama, Taku Kimura
  • Publication number: 20170176904
    Abstract: An image forming apparatus includes a fixing unit that includes a roller and an electric heating wire heater, a current applying circuit that applies electrical current to the electric heater wire heater, a measuring unit electrically connected to the current applying circuit and that measures a value of electrical current that flows through the electric heating wire heater, and a controller that controls the electrical current that flows through the electric heating wire heater by controlling the current applying circuit based on the electrical current value measured by the measuring unit. The controller controls the electrical current to be less than or equal to an electrical current limit value. A magnitude of the electrical current limit value is linked to a magnitude of stable state electrical current.
    Type: Application
    Filed: December 16, 2016
    Publication date: June 22, 2017
    Applicant: Konica Minolta, Inc.
    Inventors: Taku Kimura, Mikiyuki Aoki, Seiichi Kirikubo, Takeshi Tamada, Akinori Kimata
  • Publication number: 20160337539
    Abstract: A power control device receiving supply of power from a power source, the power control device including: a power accumulator accumulating a part of power from the power source; a first voltage converter receiving power from the power source and the power accumulator, performing voltage conversion to a first target voltage, and supplying power with the first target voltage to a first load; a second voltage converter receiving power from the first voltage converter, performing voltage conversion to a second target voltage, and supplying power with the second target voltage to a second load; a power source monitor monitoring power from the power source; and a power controller lowering the first target voltage to a level that the second voltage converter is capable of converting to the second target voltage when the power source monitor detects that the supply of power from the power source has stopped.
    Type: Application
    Filed: April 22, 2016
    Publication date: November 17, 2016
    Applicant: KONICA MINOLTA, INC.
    Inventors: Junichi MASUDA, Mikiyuki AOKI, Masahiro NONOYAMA, Taku KIMURA
  • Patent number: 9335710
    Abstract: An electric power supply control device comprises a first converter, at least one second converter, and an electrical voltage control unit. The second converter can work in intermittent oscillation, and converts outputting electrical voltage from the first converter. The electrical voltage control unit controls the outputting electrical voltage of the first converter, so that the outputting electrical voltage is equal to or less than a minimum value of upper limits of operating electrical voltage of the second converter, and is more than or equal to a maximum value of lower limits of operating electrical voltage of the second converter, and at least one of the second converter performs low electric power behavior.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: May 10, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Mikiyuki Aoki, Taku Kimura, Yohei Yamada, Morio Kinoshita, Toru Kasamatsu, Kouei Cho
  • Publication number: 20160085199
    Abstract: An electric power supply control device comprises a first converter, at least one second converter, and an electrical voltage control unit. The second converter can work in intermittent oscillation, and converts outputting electrical voltage from the first converter. The electrical voltage control unit controls the outputting electrical voltage of the first converter, so that the outputting electrical voltage is equal to or less than a minimum value of upper limits of operating electrical voltage of the second converter, and is more than or equal to a maximum value of lower limits of operating electrical voltage of the second converter, and at least one of the second converter performs low electric power behavior.
    Type: Application
    Filed: September 15, 2015
    Publication date: March 24, 2016
    Applicant: KONICA MINOLTA, INC.
    Inventors: Mikiyuki AOKI, Taku KIMURA, Yohei YAMADA, Morio KINOSHITA, Toru KASAMATSU, Kouei CHO
  • Publication number: 20150256079
    Abstract: An electric power supply control device comprises AC/DC converter, DC/DC converters, and an output electrical voltage monitor unit of the AC/DC converter. When output electrical voltage of the AC/DC converter increases to the first preset value P1, the AC/DC converter stops the convert. When the output electrical voltage decreases to the second preset value P2, the AC/DC converter restarts the convert. The first preset value P1 is equal to or less than the lowest value, out of the upper limit values in electrical voltage ranges in which the DC/DC converters CV1 and CV2 can work. The second preset value P2 is more than or equal to the highest value, out of the lower limit values in electrical voltage ranges in which the DC/DC converters CV1 and CV2 can work.
    Type: Application
    Filed: March 10, 2015
    Publication date: September 10, 2015
    Applicant: Konica Minolta, Inc.
    Inventors: Taku KIMURA, Mikiyuki AOKI, Hideki NAKAMURA, Masahiro NONOYAMA, Junichi MASUDA, Yohei YAMADA
  • Patent number: 8811847
    Abstract: An image forming apparatus that forms a color image by overlaying toner images formed on respective first, second, and third photoreceptors, comprising: first, second, and third voltage-applied members respectively facing the first, second, and third photoreceptors; a first AC power supply generating first AC voltage, and superimposing the first AC voltage on first DC voltage to generate first voltage for causing a first electric field between the first voltage-applied member and the first photoreceptor; a second AC power supply generating second AC voltage, and superimposing the second AC voltage on second DC voltage to generate second voltage for causing a second electric field between the second voltage-applied member and the second photoreceptor; and a composite circuit superimposing a composite of the first voltage and the second voltage on third DC voltage, to generate third voltage for causing a third electric field between the third voltage-applied member and the third photoreceptor.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: August 19, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Mikiyuki Aoki, Junichi Masuda, Taku Kimura, Takahiro Yokoya