Patents by Inventor Kousei MIYASHITA

Kousei MIYASHITA 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: 20220253007
    Abstract: An image forming apparatus includes an image forming unit, a film-shaped cylindrical body, a heating body unit, a first member, and a control unit. The image forming unit forms an image on a sheet. The cylindrical body has a sheet-passing region coming into contact with the sheet to fix the image to the sheet moving in a first direction. The cylindrical body is broader than the sheet-passing region in a second direction orthogonal to the first direction. The heating body unit includes a heating body and comes into contact with a first surface inside the cylindrical body. The first member is disposed on a second surface opposite to the first surface of the heating body. The first member has an outer end disposed outside an outer end of the sheet-passing region in the second direction. The control unit allows the heating body to generate heat inside the outer end of the sheet-passing region in the second region.
    Type: Application
    Filed: April 26, 2022
    Publication date: August 11, 2022
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Kousei MIYASHITA
  • 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: 20220187745
    Abstract: An image forming apparatus includes an image forming unit to form an image on a sheet. A fixing device heats the sheet and includes a tubular body that presses against the sheet and rotates, and a heat generator contacts an inside surface of the tubular body. The length dimension of the heat generator is aligned with the axial direction of the tubular body. The heat generator has a first row of first heating elements with a first gap between each adjacent pair of first heating elements and a second row of second heating elements. The first and second rows are offset from one another in a width direction corresponding to the sheet conveyance direction. A second gap is between each adjacent pair of second heating elements in the longitudinal direction. The positions of the first gaps are different from positions of the second gaps.
    Type: Application
    Filed: June 2, 2021
    Publication date: June 16, 2022
    Inventor: Kousei MIYASHITA
  • 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
  • Patent number: 11340545
    Abstract: An image forming apparatus includes an image forming unit, a film-shaped cylindrical body, a heating body unit, a first member, and a control unit. The image forming unit forms an image on a sheet. The cylindrical body has a sheet-passing region coming into contact with the sheet to fix the image to the sheet moving in a first direction. The cylindrical body is broader than the sheet-passing region in a second direction orthogonal to the first direction. The heating body unit includes a heating body and comes into contact with a first surface inside the cylindrical body. The first member is disposed on a second surface opposite to the first surface of the heating body. The first member has an outer end disposed outside an outer end of the sheet-passing region in the second direction. The control unit allows the heating body to generate heat inside the outer end of the sheet-passing region in the second region.
    Type: Grant
    Filed: February 9, 2021
    Date of Patent: May 24, 2022
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Kousei Miyashita
  • 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
  • Publication number: 20220121143
    Abstract: A heating unit includes a rotating cylinder rotating about an axis parallel to a first direction. A heater having a width in a second direction is on the inner surface of the cylinder. A support member holds the heater fixed relative to the cylinder and includes an upstream member adjacent to the heater in the second direction and a downstream member adjacent to the heater in the second direction. The heating unit may include, in some examples, a stay supporting the support member, a guide member on the stay, and a temperature sensor to measure a temperature of an inner surface of the cylinder.
    Type: Application
    Filed: December 29, 2021
    Publication date: April 21, 2022
    Inventors: Kousei MIYASHITA, Sasuke ENDO
  • 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
  • Patent number: 11243487
    Abstract: A heating unit includes a rotating cylinder rotating about an axis parallel to a first direction. A heater having a width in a second direction is on the inner surface of the cylinder. A support member holds the heater fixed relative to the cylinder and includes an upstream member adjacent to the heater in the second direction and a downstream member adjacent to the heater in the second direction. The support member has upstream ribs on the upstream member and downstream ribs on the downstream member, each rib having a curved shape facing the inner surface of the rotating cylinder and being spaced from each other in the first direction. The heating unit may include, in some examples, a stay supporting the support member, a guide member on the stay, and a temperature sensor.
    Type: Grant
    Filed: July 23, 2020
    Date of Patent: February 8, 2022
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Kousei Miyashita, Sasuke Endo
  • 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
  • Publication number: 20210132526
    Abstract: A heating unit includes a rotating cylinder rotating about an axis parallel to a first direction. A heater having a width in a second direction is on the inner surface of the cylinder. A support member holds the heater fixed relative to the cylinder and includes an upstream member adjacent to the heater in the second direction and a downstream member adjacent to the heater in the second direction. The support member has upstream ribs on the upstream member and downstream ribs on the downstream member, each rib having a curved shape facing the inner surface of the rotating cylinder and being spaced from each other in the first direction.
    Type: Application
    Filed: July 23, 2020
    Publication date: May 6, 2021
    Inventors: Kousei Miyashita, Sasuke Endo
  • 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