Patents by Inventor Ryosuke Kojima

Ryosuke Kojima 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: 11448994
    Abstract: An image forming apparatus includes a conveyor, an actuator, an image forming unit, a detection unit, and a controller. The conveyor transports a sheet having a length measured in a transport direction. The actuator drives the conveyor. The image forming unit forms an image on the sheet. The detection unit includes a first sheet detection sensor that outputs a detection signal indicating whether the sheet transported by the conveyor passes through a first predetermined detection position. The controller controls the actuator based on the length of the sheet in response to an indication that the detection unit is not operating normally.
    Type: Grant
    Filed: March 24, 2020
    Date of Patent: September 20, 2022
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Ryosuke Kojima
  • Publication number: 20220206422
    Abstract: A heating device includes a rotatable film, a heater including a substrate that extends along a first direction and having two surfaces opposite to each other, and a heater element on one of the surfaces of the substrate, and a heat conductor having first and second surfaces and including a first portion contacting the other surface of the substrate, and a second portion that is adjacent to the first portion in a second direction perpendicular to the first direction and does not contact the other surface of the substrate. A thickness of the first portion of the heat conductor from the first surface to the second surface is greater than a thickness of the second portion from the first surface to the second surface.
    Type: Application
    Filed: March 16, 2022
    Publication date: June 30, 2022
    Inventors: Kazuhiko KIKUCHI, Sasuke ENDO, Masaya TANAKA, Ryota SAEKI, Kiyotaka MURAKAMI, Kousei MIYASHITA, Ryosuke KOJIMA, Yohei DOI, Yuki KAWASHIMA, Eiji SHINOHARA
  • Publication number: 20220171314
    Abstract: A fixing unit or device that can be used in an image forming apparatus includes a first heater element that is formed of a material that increases in electrical resistance with increases in temperature. A controller of the fixing unit is configured to vary a duty ratio of electric power applied to the first heater element during a start-up operation in which the temperature of the first heater element is raised to a target operating temperature. By varying the duty ratio during the start-up operation, changes in the resistance of the first heater element with the heating can be compensated. For example, the duty ratio can be increased during the course of the start-up to achieve the target operating temperature faster.
    Type: Application
    Filed: February 16, 2022
    Publication date: June 2, 2022
    Inventors: Kiyotaka MURAKAMI, Kazuhiko KIKUCHI, Sasuke ENDO, Masaya TANAKA, Ryota SAEKI, Kousei MIYASHITA, Ryosuke KOJIMA, Yohei DOI, Yuki KAWASHIMA, Eiji SHINOHARA
  • Publication number: 20220155710
    Abstract: An image processing apparatus includes a fixing unit including a fixing belt, and a heater configured to heat the fixing belt and including a substrate and a heating layer that is formed on the substrate, and a controller configured to, upon detecting an absence of a current flowing through the fixing belt, control the heater to not generate heat.
    Type: Application
    Filed: February 2, 2022
    Publication date: May 19, 2022
    Inventors: Yohei DOI, Eiji SHINOHARA, Kazuhiko KIKUCHI, Sasuke ENDO, Masaya TANAKA, Ryota SAEKI, Kousei MIYASHITA, Ryosuke KOJIMA, Yuki KAWASHIMA, Kiyotaka MURAKAMI
  • Patent number: 11307522
    Abstract: A heating device includes a rotatable film, a heater including a substrate that extends along a first direction, and a heater element on the substrate and facing the film, a heat conductor having first and second surfaces and including a first portion contacting the substrate, and a second portion that is adjacent to the first portion in a second direction perpendicular to the first direction and does not contact the substrate, and a temperature sensing element on the second surface at a position corresponding to the second portion. A thickness of the first portion from the first surface to the second surface is greater than a thickness of the second portion from the first surface to the second surface.
    Type: Grant
    Filed: April 27, 2021
    Date of Patent: April 19, 2022
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Kazuhiko Kikuchi, Sasuke Endo, Masaya Tanaka, Ryota Saeki, Kiyotaka Murakami, Kousei Miyashita, Ryosuke Kojima, Yohei Doi, Yuki Kawashima, Eiji Shinohara
  • Patent number: 11281132
    Abstract: A fixing unit or device that can be used in an image forming apparatus includes a first heater element that is formed of a material that increases in electrical resistance with increases in temperature. A controller of the fixing unit is configured to vary a duty ratio of electric power applied to the first heater element during a start-up operation in which the temperature of the first heater element is raised to a target operating temperature. By varying the duty ratio during the start-up operation, changes in the resistance of the first heater element with the heating can be compensated. For example, the duty ratio can be increased during the course of the start-up to achieve the target operating temperature faster.
    Type: Grant
    Filed: July 6, 2020
    Date of Patent: March 22, 2022
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Kiyotaka Murakami, Kazuhiko Kikuchi, Sasuke Endo, Masaya Tanaka, Ryota Saeki, Kousei Miyashita, Ryosuke Kojima, Yohei Doi, Yuki Kawashima, Eiji Shinohara
  • Patent number: 11275330
    Abstract: An image processing apparatus includes a fixing unit including a heater and a fixing belt. The fixing belt is electrically connected between a first power source and a ground terminal. A controller is configured to control the heater to heat the fixing belt. The controller is further configured to determine whether a current is flowing through the fixing belt and, upon determining that a current is not flowing through the fixing belt, control the heater not to heat the fixing belt.
    Type: Grant
    Filed: March 22, 2021
    Date of Patent: March 15, 2022
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Yohei Doi, Eiji Shinohara, Kazuhiko Kikuchi, Sasuke Endo, Masaya Tanaka, Ryota Saeki, Kousei Miyashita, Ryosuke Kojima, Yuki Kawashima, Kiyotaka Murakami
  • Publication number: 20210302893
    Abstract: An image forming apparatus includes a conveyor, an actuator, an image forming unit, a detection unit, and a controller. The conveyor transports a sheet having a length measured in a transport direction. The actuator drives the conveyor. The image forming unit forms an image on the sheet. The detection unit includes a first sheet detection sensor that outputs a detection signal indicating whether the sheet transported by the conveyor passes through a first predetermined detection position. The controller controls the actuator based on the length of the sheet in response to an indication that the detection unit is not operating normally.
    Type: Application
    Filed: March 24, 2020
    Publication date: September 30, 2021
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Ryosuke KOJIMA
  • Patent number: 11106164
    Abstract: A heating device includes a cylindrical film configured to be rotated about an axis, a heater including a substrate that extends along a longitudinal direction parallel to the axis, and a heater element on the substrate and facing an inner surface of the cylindrical film. A heat conductor extends along the longitudinal direction and has first and second surfaces. A first portion of the heat conductor contacts the substrate and a second portion of the heat conductor has a groove in the first surface. A temperature sensing element is disposed at a position on the second surface at a position opposite the groove.
    Type: Grant
    Filed: May 21, 2020
    Date of Patent: August 31, 2021
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Kazuhiko Kikuchi, Sasuke Endo, Masaya Tanaka, Ryota Saeki, Kiyotaka Murakami, Kousei Miyashita, Ryosuke Kojima, Yohei Doi, Yuki Kawashima, Eiji Shinohara
  • Publication number: 20210247712
    Abstract: A heating device includes a rotatable film, a heater including a substrate that extends along a first direction, and a heater element on the substrate and facing the film, a heat conductor having first and second surfaces and including a first portion contacting the substrate, and a second portion that is adjacent to the first portion in a second direction perpendicular to the first direction and does not contact the substrate, and a temperature sensing element on the second surface at a position corresponding to the second portion. A thickness of the first portion from the first surface to the second surface is greater than a thickness of the second portion from the first surface to the second surface.
    Type: Application
    Filed: April 27, 2021
    Publication date: August 12, 2021
    Inventors: Kazuhiko KIKUCHI, Sasuke ENDO, Masaya TANAKA, Ryota SAEKI, Kiyotaka MURAKAMI, Kousei MIYASHITA, Ryosuke KOJIMA, Yohei DOI, Yuki KAWASHIMA, Eiji SHINOHARA
  • Patent number: 11073776
    Abstract: An image forming apparatus includes a heater, a fixing device, and a controller. The heater includes a heat generator that generates heat when the heater is turned on. The fixing device may fix a developer image on a surface of an image forming medium using the heat from the heat generator. The controller detects a voltage of a power supply for supplying electric power to the heater, and determines an occurrence of an abnormality in the heater if a voltage drop amount at the time the heater is turned on as compared to a case in which the heater is turned off is smaller than a first threshold value.
    Type: Grant
    Filed: September 18, 2019
    Date of Patent: July 27, 2021
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Eiji Shinohara, Kazuhiko Kikuchi, Sasuke Endo, Masaya Tanaka, Ryota Saeki, Kousei Miyashita, Ryosuke Kojima, Yohei Doi, Yuki Kawashima, Kiyotaka Murakami
  • Publication number: 20210208526
    Abstract: An image processing apparatus includes a fixing unit including a heater and a fixing belt. The fixing belt is electrically connected between a first power source and a ground terminal. A controller is configured to control the heater to heat the fixing belt. The controller is further configured to determine whether a current is flowing through the fixing belt and, upon determining that a current is not flowing through the fixing belt, control the heater not to heat the fixing belt.
    Type: Application
    Filed: March 22, 2021
    Publication date: July 8, 2021
    Inventors: Yohei DOI, Eiji SHINOHARA, Kazuhiko KIKUCHI, Sasuke ENDO, Masaya TANAKA, Ryota SAEKI, Kousei MIYASHITA, Ryosuke KOJIMA, Yuki KAWASHIMA, Kiyotaka MURAKAMI
  • Patent number: 10990044
    Abstract: An image processing apparatus includes a fixing unit including a heater and a fixing belt. The fixing belt is electrically connected between a first power source and a ground terminal. A controller is configured to control the heater to heat the fixing belt. The controller is further configured to determine whether a current is flowing through the fixing belt and, upon determining that a current is not flowing through the fixing belt, control the heater not to heat the fixing belt.
    Type: Grant
    Filed: May 27, 2020
    Date of Patent: April 27, 2021
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Yohei Doi, Eiji Shinohara, Kazuhiko Kikuchi, Sasuke Endo, Masaya Tanaka, Ryota Saeki, Kousei Miyashita, Ryosuke Kojima, Yuki Kawashima, Kiyotaka Murakami
  • Publication number: 20210088947
    Abstract: A fixing unit or device that can be used in an image forming apparatus includes a first heater element that is formed of a material that increases in electrical resistance with increases in temperature. A controller of the fixing unit is configured to vary a duty ratio of electric power applied to the first heater element during a start-up operation in which the temperature of the first heater element is raised to a target operating temperature. By varying the duty ratio during the start-up operation, changes in the resistance of the first heater element with the heating can be compensated. For example, the duty ratio can be increased during the course of the start-up to achieve the target operating temperature faster.
    Type: Application
    Filed: July 6, 2020
    Publication date: March 25, 2021
    Inventors: Kiyotaka MURAKAMI, Kazuhiko KIKUCHI, Sasuke ENDO, Masaya TANAKA, Ryota SAEKI, Kousei MIYASHITA, Ryosuke KOJIMA, Yohei DOI, Yuki KAWASHIMA, Eiji SHINOHARA
  • Publication number: 20210080880
    Abstract: An image forming apparatus includes a heater, a fixing device, and a controller. The heater includes a heat generator that generates heat when the heater is turned on. The fixing device may fix a developer image on a surface of an image forming medium using the heat from the heat generator. The controller detects a voltage of a power supply for supplying electric power to the heater, and determines an occurrence of an abnormality in the heater if a voltage drop amount at the time the heater is turned on as compared to a case in which the heater is turned off is smaller than a first threshold value.
    Type: Application
    Filed: September 18, 2019
    Publication date: March 18, 2021
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Eiji SHINOHARA, Kazuhiko KIKUCHI, Sasuke ENDO, Masaya TANAKA, Ryota SAEKI, Kousei MIYASHITA, Ryosuke KOJIMA, Yohei DOI, Yuki KAWASHIMA, Kiyotaka MURAKAMI
  • Publication number: 20210072679
    Abstract: An image processing apparatus includes a fixing unit including a heater and a fixing belt. The fixing belt is electrically connected between a first power source and a ground terminal. A controller is configured to control the heater to heat the fixing belt. The controller is further configured to determine whether a current is flowing through the fixing belt and, upon determining that a current is not flowing through the fixing belt, control the heater not to heat the fixing belt.
    Type: Application
    Filed: May 27, 2020
    Publication date: March 11, 2021
    Inventors: Yohei DOI, Eiji SHINOHARA, Kazuhiko KIKUCHI, Sasuke ENDO, Masaya TANAKA, Ryota SAEKI, Kousei MIYASHITA, Ryosuke KOJIMA, Yuki KAWASHIMA, Kiyotaka MURAKAMI
  • Publication number: 20210063927
    Abstract: A heating device includes a cylindrical film configured to be rotated about an axis, a heater including a substrate that extends along a longitudinal direction parallel to the axis, and a heater element on the substrate and facing an inner surface of the cylindrical film. A heat conductor extends along the longitudinal direction and has first and second surfaces. A first portion of the heat conductor contacts the substrate and a second portion of the heat conductor has a groove in the first surface. A temperature sensing element is disposed at a position on the second surface at a position opposite the groove.
    Type: Application
    Filed: May 21, 2020
    Publication date: March 4, 2021
    Inventors: Kazuhiko KIKUCHI, Sasuke ENDO, Masaya TANAKA, Ryota SAEKI, Kiyotaka MURAKAMI, Kousei MIYASHITA, Ryosuke KOJIMA, Yohei DOI, Yuki KAWASHIMA, Eiji SHINOHARA
  • Patent number: 10917720
    Abstract: A sound source localization device includes an acquisition unit configured to acquire acoustic signals of M channels (M is an integer equal to or greater than one), a phase difference information calculator configured to perform a short-time Fourier transform on the acoustic signals of M channels and to convert a time domain into a frequency domain including phase information, and an estimator configured to input phase information of the acoustic signals subjected to the short-time Fourier transform to a deep learning machine and to perform sound source localization of the acoustic signals using the deep learning machine where input follows a von Mises distribution.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: February 9, 2021
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Kazuhiro Nakadai, Shungo Masaki, Ryosuke Kojima, Osamu Sugiyama, Katsutoshi Itoyama, Kenji Nishida
  • Publication number: 20200275200
    Abstract: A sound source localization device includes an acquisition unit configured to acquire acoustic signals of M channels (M is an integer equal to or greater than one), a phase difference information calculator configured to perform a short-time Fourier transform on the acoustic signals of M channels and to convert a time domain into a frequency domain including phase information, and an estimator configured to input phase information of the acoustic signals subjected to the short-time Fourier transform to a deep learning machine and to perform sound source localization of the acoustic signals using the deep learning machine where input follows a von Mises distribution.
    Type: Application
    Filed: February 20, 2020
    Publication date: August 27, 2020
    Inventors: Kazuhiro Nakadai, Shungo Masaki, Ryosuke Kojima, Osamu Sugiyama, Katsutoshi Itoyama, Kenji Nishida
  • Patent number: 10390130
    Abstract: A sound processing apparatus includes an acquisition unit configured to acquire sound signals collected by a microphone array, a sound source localization unit configured to determine a sound source direction on the basis of the sound signals acquired by the acquisition unit, and a sound source identification unit configured to identify a type of sound source on the basis of a sound model indicating a dependence relationship between sound sources, in which the sound model is represented by a probabilistic model expression including sound source localization as an element.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: August 20, 2019
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Kazuhiro Nakadai, Ryosuke Kojima