Patents by Inventor Ryota SAEKI

Ryota SAEKI 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: 20220179343
    Abstract: According to one embodiment, a fixing device includes a belt, a heater, and a holder. The holder has a plurality of support portions that contact an end of the first heating region and an end of the second heating region along the direction perpendicular to the transport direction, and a plurality of non-contacting portions that do not contact the end of the first heating region and the end of the second heating region between the plurality of support portions, the end of the second heating region contacts one of the plurality of support portions at a side in the direction perpendicular to the transport direction, and the end of the second heating region faces to one of the plurality of non-contacting portions at the other side in the direction perpendicular to the transport direction.
    Type: Application
    Filed: February 25, 2022
    Publication date: June 9, 2022
    Inventor: Ryota Saeki
  • 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
  • Publication number: 20220100130
    Abstract: A heating device includes a belt, a heater that is in contact with an inner surface of the belt and divided into heater blocks in a width direction thereof, a pressing member that presses a sheet against the belt, a temperature sensor disposed on each of a number of the heater blocks that is at least one-half of the total number thereof, and a processor configured to select one or more of the heater blocks based on a width of the sheet, and select one or more temperature sensors disposed on one or more of the selected heater blocks having the non-paper passing region and control electric power supplied to said one or more of the selected heater blocks to protect against an excessive temperature rise in the non-paper passing region based on temperatures detected by the temperature sensors.
    Type: Application
    Filed: December 7, 2021
    Publication date: March 31, 2022
    Inventors: Chie MIYAUCHI, Osamu TAKAGI, Ryota SAEKI
  • 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: 11262679
    Abstract: According to one embodiment, a fixing device includes a belt, a heater, and a holder. The belt is formed into a cylindrical shape, is rotated in a circumferential direction to transport a sheet, and applies heat to the sheet. The heater is arranged on an inner side of the belt and extends in a predetermined longitudinal direction to heat the belt. The holder extends in the longitudinal direction of the heater and holds the heater. The holder includes a support portion and a retraction portion. The support portion comes into contact with the heater and supports the heater. The retraction portion is provided at a position avoiding the support portion in the longitudinal direction of the heater, and includes a smaller contact area with the heater than the contact area between the support portion and the heater or does not come into contact with the heater.
    Type: Grant
    Filed: January 6, 2021
    Date of Patent: March 1, 2022
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Ryota Saeki
  • Publication number: 20220043383
    Abstract: An image processing apparatus includes an image forming unit configured to form an image on a sheet, a heating device including a belt that contacts the sheet and a plurality of heating elements for heating the belt, a pressure roller configured to press the sheet against the belt, a voltage detection circuit configured to measure a voltage applied to the heating elements, and a controller configured to determine whether at least one of the heating elements is abnormal according to a voltage drop value that is based on voltages measured by the voltage detection unit before and after the plurality of heating elements is energized.
    Type: Application
    Filed: May 6, 2021
    Publication date: February 10, 2022
    Inventor: Ryota SAEKI
  • Publication number: 20220035286
    Abstract: A heating device includes a cylindrical film a heater disposed inside the cylindrical film on an inner surface of the cylindrical film. The heater has a plurality of heating elements on a first surface that are spaced from each other at intervals along an axial direction. A heat transfer member contacts a second surface of the heater. The heat transfer member is arranged such that, in a first region of the heater that includes just a single one of the heating elements, contact between the heater and heat transfer member is greater than in a second region of the heater that includes an interval between a pair of adjacent heating elements.
    Type: Application
    Filed: May 13, 2021
    Publication date: February 3, 2022
    Inventor: Ryota SAEKI
  • Patent number: 11231668
    Abstract: A heating device includes a belt, a heater that is in contact with an inner surface of the belt and divided into heater blocks in a width direction thereof, a pressing member that presses a sheet against the belt, a temperature sensor disposed on each of a number of the heater blocks that is at least one-half of the total number thereof, and a processor configured to select one or more of the heater blocks based on a width of the sheet, and select one or more temperature sensors disposed on one or more of the selected heater blocks having the non-paper passing region and control electric power supplied to said one or more of the selected heater blocks to protect against an excessive temperature rise in the non-paper passing region based on temperatures detected by the temperature sensors.
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: January 25, 2022
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventors: Chie Miyauchi, Osamu Takagi, Ryota Saeki
  • Publication number: 20210405560
    Abstract: A fixing belt and a fixing device suppress charging of the fixing belt and permit securing of a withstand voltage of secondary parts of the fixing belt are provided in addition to a heater. The fixing belt is formed of a tubular endless fixing film including, in order from an inner peripheral side of the film, abase layer, an elastic layer, and a release layer. A surface resistivity of the fixing belt measured from the base layer side is 7 [LOG ?/sq.] or more and 10 [LOG ?/sq.] or less.
    Type: Application
    Filed: September 10, 2021
    Publication date: December 30, 2021
    Applicant: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Ryota SAEKI
  • Patent number: 11143995
    Abstract: A fixing belt and a fixing device suppress charging of the fixing belt and permit securing of a withstand voltage of secondary parts of the fixing belt are provided in addition to a heater. The fixing belt is formed of a tubular endless fixing film including, in order from an inner peripheral side of the film, a base layer, an elastic layer, and a release layer. A surface resistivity of the fixing belt measured from the base layer side is 7 [LOG ?/sq.] or more and 10 [LOG ?/sq.] or less.
    Type: Grant
    Filed: July 9, 2020
    Date of Patent: October 12, 2021
    Assignee: TOSHIBA TEC KABUSHIKI KAISHA
    Inventor: Ryota Saeki
  • 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: 20210263456
    Abstract: A heating device includes a rotatable cylindrical film, and a heater facing an inner surface of the cylindrical film on a first side of the heater. The heater extends along a longitudinal direction and includes a plurality of heating elements arranged in a line along the longitudinal direction, and the heating elements include a first heating element and one or more second heating elements that are independently controllable with respect to the first heating element. The heating device further includes a heat conductor on a second side of the heater opposite the first side, the heat conductor extending along the longitudinal direction.
    Type: Application
    Filed: May 7, 2021
    Publication date: August 26, 2021
    Inventor: Ryota SAEKI
  • 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
  • Publication number: 20210232071
    Abstract: An image forming apparatus includes a fixing device including a heat generating element, a fixing belt which moves along a surface of the heat generating element while an inner peripheral surface of the fixing belt contacts the heat generating element via a lubricant, and a rotatable body configured to be pressed against an outer peripheral surface of the fixing belt. The apparatus further includes a processor configured to cause the rotatable body to execute a predetermined operation a first time to increase a gap between the heat generating element and the fixing belt, and cause the rotatable body to execute the predetermined operation a second time to further increase the gap.
    Type: Application
    Filed: April 12, 2021
    Publication date: July 29, 2021
    Inventor: Ryota SAEKI
  • 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: 20210181660
    Abstract: A heating device includes a belt, a heater that is in contact with an inner surface of the belt and divided into heater blocks in a width direction thereof, a pressing member that presses a sheet against the belt, a temperature sensor disposed on each of a number of the heater blocks that is at least one-half of the total number thereof, and a processor configured to select one or more of the heater blocks based on a width of the sheet, and select one or more temperature sensors disposed on one or more of the selected heater blocks having the non-paper passing region and control electric power supplied to said one or more of the selected heater blocks to protect against an excessive temperature rise in the non-paper passing region based on temperatures detected by the temperature sensors.
    Type: Application
    Filed: March 2, 2021
    Publication date: June 17, 2021
    Inventors: Chie MIYAUCHI, Osamu TAKAGI, Ryota SAEKI