Patents by Inventor Dai Kanai

Dai Kanai 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: 11048191
    Abstract: A developer supply container includes a developer accommodating portion having one end provided with an opening, and drive receiving portion, a discharging portion including a receiving portion into which the one end of the accommodating portion is inserted, and a developer discharge opening, the accommodating portion being mounted to the discharging portion rotatably relative to the discharging portion; a sealing member sealing between the one end and the receiving portion; a projection radially projecting from an outer peripheral surface of the accommodating portion; and a first restricting portion and a second restricting portion provided on the receiving portion of the discharging portion at positions upstream and downstream of the projection, respectively in the inserting direction and contactable to the projection to restrict an inclination of the rotational axis of the accommodating portion relative to the inserting direction within a predetermined range.
    Type: Grant
    Filed: August 29, 2019
    Date of Patent: June 29, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Fumoto, Dai Kanai, Kiyoshi Oyama
  • Patent number: 11029626
    Abstract: An image forming apparatus includes a belt, an outer roller, stretching rollers including an inner roller and an upstream roller, a voltage source, a supporting member, a moving mechanism, a sensor, and a controller. On the basis of a first detection result of the sensor acquired under application of a test bias in a state in which the supporting member is disposed at a first position, the controller determines a first transfer bias to be applied to the outer roller or the inner roller during an operation in a first mode. On the basis of a second detection result of the sensor acquired under application of the test bias in the state in which the supporting member is disposed at a second position, the controller determines a second transfer bias to be applied to the outer roller or the inner roller during an operation in a second mode.
    Type: Grant
    Filed: May 14, 2019
    Date of Patent: June 8, 2021
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuusuke Torimaru, Dai Kanai, Shozo Aiba, Tatsuya Kohno
  • Patent number: 10809649
    Abstract: A developer supply container includes an accommodating portion, a discharging portion, a sealing member, a first restricting portion, and a second restricting portion positioned upstream of the first restricting portion with respect to an inserting direction of the accommodating portion. The seal member is provided between the first restricting portion and the second restricting portion with respect to a rotational axis direction of the accommodating portion.
    Type: Grant
    Filed: August 27, 2019
    Date of Patent: October 20, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Fumoto, Dai Kanai, Kiyoshi Oyama
  • Patent number: 10739701
    Abstract: A developing device includes a developer container configured to accommodate a developer containing toner and a carrier, and a feeding screw provided rotatably in the developer container and configured to feed the developer in a predetermined feeding direction. The feeding screw includes a rotation shaft, and a first helical blade and a second helical blade which are formed around the rotation shaft and which form a multi-thread helical blade. The feeding screw includes a region in which a plate-like projection portion is provided on the rotation shaft between the first helical blade and the second helical blade. The plate-like projection portion is provided to contact an adjacent helical blade on a downstream side with respect to the feeding direction without contacting an adjacent helical blade on an upstream side with respect to the feeding direction.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: August 11, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kouhei Mishima, Dai Kanai
  • Patent number: 10670991
    Abstract: A developing device includes a developer container configured to accommodate a developer containing toner and a carrier and a feeding screw provided rotatably in the developer container and configured to feed the developer in a predetermined feeding direction. The feeding screw includes a rotation shaft, and a first helical blade and a second helical blade which are formed around the rotation shaft and which form a multi-thread helical blade. The feeding screw includes a region in which a plate-like projection portion is provided on the rotation shaft between the first helical blade and the second helical blade.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: June 2, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kouhei Mishima, Dai Kanai
  • Patent number: 10606185
    Abstract: A developing device includes: a developer carrying member (sleeve); a regulating portion including an edge portion at a closest position to a surface of the sleeve or a flat portion tilted, at the closest position, by an angle of 2 degrees or less relative to a contact flat plane contacting the surface of the sleeve; and a rectifying portion connected with the edge or flat portion. The rectifying portion has a concavely curved surface such that a rate of a decrease in gap between the rectifying portion and the contact flat plane increases toward a downstream side of the developer feeding direction and is formed by smoothly connecting rectilinear or curved lines each of 0.2 mm or less except for the edge portion so that the gap between the rectifying portion and the contact flat plane is monotonically decreases toward the downstream side of the developer feeding direction.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: March 31, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takeshi Yasumoto, Dai Kanai, Koichi Watanabe
  • Publication number: 20200073280
    Abstract: A developer supply container includes an accommodating portion, a discharging portion, a sealing member, a first restricting portion, and a second restricting portion positioned upstream of the first restricting portion with respect to an inserting direction of the accommodating portion. The seal member is provided between the first restricting portion and the second restricting portion with respect to a rotational axis direction of the accommodating portion.
    Type: Application
    Filed: August 27, 2019
    Publication date: March 5, 2020
    Inventors: Masataka Fumoto, Dai Kanai, Kiyoshi Oyama
  • Publication number: 20200073289
    Abstract: A developer supply container includes a developer accommodating portion having one end provided with an opening, and drive receiving portion, a discharging portion including a receiving portion into which the one end of the accommodating portion is inserted, and a developer discharge opening, the accommodating portion being mounted to the discharging portion rotatably relative to the discharging portion; a sealing member sealing between the one end and the receiving portion; a projection radially projecting from an outer peripheral surface of the accommodating portion; and a first restricting portion and a second restricting portion provided on the receiving portion of the discharging portion at positions upstream and downstream of the projection, respectively in the inserting direction and contactable to the projection to restrict an inclination of the rotational axis of the accommodating portion relative to the inserting direction within a predetermined range.
    Type: Application
    Filed: August 29, 2019
    Publication date: March 5, 2020
    Inventors: Masataka Fumoto, Dai Kanai, Kiyoshi Oyama
  • Publication number: 20190354044
    Abstract: An image forming apparatus includes a belt, an outer roller, stretching rollers including an inner roller and an upstream roller, a voltage source, a supporting member, a moving mechanism, a sensor, and a controller. On the basis of a first detection result of the sensor acquired under application of a test bias in a state in which the supporting member is disposed at a first position, the controller determines a first transfer bias applied to the outer roller or the inner roller during an operation in a first mode. On the basis of a second detection result of the sensor acquired under application of the test bias in the state in which the supporting member is disposed at a second position, the controller determines a second transfer bias applied to the outer roller or the inner roller during an operation in a second mode.
    Type: Application
    Filed: May 14, 2019
    Publication date: November 21, 2019
    Inventors: Yuusuke Torimaru, Dai Kanai, Shozo Aiba, Tatsuya Kohno
  • Publication number: 20190227460
    Abstract: A developing device includes a developer container configured to accommodate a developer containing toner and a carrier; and a feeding screw provided rotatably in the developer container and configured to feed the developer in a predetermined feeding direction, the feeding screw including a rotation shaft, and a first helical blade and a second helical blade which are formed around the rotation shaft and which form a multi-thread helical blade. The feeding screw includes a region in which a plate-like projection portion is provided on the rotation shaft between the first helical blade and the second helical blade. The plate-like projection portion is provided so as to contact an adjacent helical blade on a downstream side with respect to the feeding direction without contacting an adjacent helical blade on an upstream side with respect to the feeding direction.
    Type: Application
    Filed: January 22, 2019
    Publication date: July 25, 2019
    Inventors: Kouhei Mishima, Dai Kanai
  • Publication number: 20190227461
    Abstract: A developing device includes a developer container configured to accommodate a developer containing toner and a carrier; and a feeding screw provided rotatably in the developer container and configured to feed the developer in a predetermined feeding direction, the feeding screw including a rotation shaft, and a first helical blade and a second helical blade which are formed around the rotation shaft and which form a multi-thread helical blade. The feeding screw includes a region in which a plate-like projection portion is provided on the rotation shaft between the first helical blade and the second helical blade.
    Type: Application
    Filed: January 22, 2019
    Publication date: July 25, 2019
    Inventors: Kouhei Mishima, Dai Kanai
  • Patent number: 10289033
    Abstract: An image forming apparatus includes a discharging device that discharges a sheet to which a toner image is transferred. The discharging device is disposed on a side opposite to a transfer surface of the sheet to which the toner image is transferred downstream from a nip portion between an intermediate transfer belt and an external secondary transfer roller in a sheet conveyance direction. The discharging device includes a grounded first discharging plate, and a grounded second discharging plate which is disposed downstream from the first discharging plate in the sheet conveyance direction at an angle different from an angle of the first discharging plate.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: May 14, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuusuke Torimaru, Dai Kanai
  • Patent number: 10197960
    Abstract: An image forming apparatus includes a main assembly, a first openable portion provided on a first side of the main assembly, a second openable portion provided on a second side of the main assembly, a single projector portion, a first projecting portion configured to project the image from above the first openable portion onto a projection object provided on the first side or onto the first openable portion when the first openable portion is open, and a second projecting portion configured to project the image from above the second openable portion onto a projection object provided on the second side or onto the second openable portion when the second openable portion is open.
    Type: Grant
    Filed: November 29, 2017
    Date of Patent: February 5, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kotaro Torikata, Dai Kanai, Teppei Nagata, Hideki Mori, Makoto Matsuo, Jun Shirayanagi, Kenta Koyama, Hideki Takaoka, Masatoshi Lin
  • Patent number: 10108110
    Abstract: An opposing surface of a partition opposing a first conveyance screw includes an arc-shaped guide portion for guiding conveyance of developer at least on an upstream side in a first conveyance direction of the first conveyance screw. The guide portion is extended from a bottom portion of a first chamber opposing the first conveyance screw and formed along an outer periphery of the first conveyance screw. As seen in a cross section orthogonal to a rotation axis of the first conveyance screw, the opposing surface of the partition within a predetermined area includes the guide portion over an angle of 30% or more of the predetermined area in a direction of rotation of the first conveyance screw.
    Type: Grant
    Filed: June 7, 2017
    Date of Patent: October 23, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takuya Hori, Dai Kanai
  • Patent number: 10068161
    Abstract: An image forming apparatus and method for controlling an image forming apparatus is provided. The image forming apparatus includes a detecting unit, a projecting unit, and a control unit. The detecting unit is configured to detect an event that needs user work on the image forming apparatus. The projecting unit is configured to project an image onto a projection target. The control unit is configured to control projection by the projecting unit. When an event that needs user work on the image forming apparatus is detected, the projecting unit projects an image onto a projection target so that a target portion of the user work can be identified and also projects an instruction image for performing the user work.
    Type: Grant
    Filed: December 21, 2016
    Date of Patent: September 4, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Makoto Matsuo, Dai Kanai, Teppei Nagata, Hideki Mori, Jun Shirayanagi, Kotaro Torikata, Kenta Koyama, Hideki Takaoka, Masatoshi Lin
  • Publication number: 20180224773
    Abstract: An image forming apparatus includes a discharging device that discharges a sheet to which a toner image is transferred. The discharging device is disposed on a side opposite to a transfer surface of the sheet to which the toner image is transferred downstream from a nip portion between an intermediate transfer belt and an external secondary transfer roller in a sheet conveyance direction. The discharging device includes a grounded first discharging plate, and a grounded second discharging plate which is disposed downstream from the first discharging plate in the sheet conveyance direction at an angle different from an angle of the first discharging plate.
    Type: Application
    Filed: January 30, 2018
    Publication date: August 9, 2018
    Inventors: Yuusuke Torimaru, Dai Kanai
  • Publication number: 20180217529
    Abstract: A stretching roller for stretching an intermediate transfer belt is tiltably disposed, and includes a sliding ring unrotatably disposed at both axial ends of a roller portion. The intermediate transfer belt winds and slidably rotates around the sliding ring. The sliding ring has a tapered portion inclined so that the outer diameter increases toward the axial end side of the stretching roller. The tapered portion is formed so that the inclination angle with respect to the central axis of the stretching roller differs at least in part in the circumferential direction.
    Type: Application
    Filed: January 25, 2018
    Publication date: August 2, 2018
    Inventors: Masataka Fumoto, Dai Kanai, Ran Kudo
  • Publication number: 20180157201
    Abstract: An image forming apparatus includes a main assembly, a first openable portion provided on a first side of the main assembly, a second openable portion provided on a second side of the main assembly, a single projector portion, a first projecting portion configured to project the image from above the first openable portion onto a projection object provided on the first side or onto the first openable portion when the first openable portion is open, and a second projecting portion configured to project the image from above the second openable portion onto a projection object provided on the second side or onto the second openable portion when the second openable portion is open.
    Type: Application
    Filed: November 29, 2017
    Publication date: June 7, 2018
    Inventors: Kotaro Torikata, Dai Kanai, Teppei Nagata, Hideki Mori, Makoto Matsuo, Jun Shirayanagi, Kenta Koyama, Hideki Takaoka, Masatoshi Lin
  • Publication number: 20180157203
    Abstract: An image forming apparatus includes a main assembly including a feeding portion configured to feed a sheet and an image forming portion configured to form an image on the fed sheet, an openable cover provided on a side surface of the main assembly and openable for exposing a component part in the main assembly by opening a space above the component part with respect to a vertical direction, and a projecting portion provided above the openable cover with respect to the vertical direction and capable of projecting light toward the component part when the openable cover is opened.
    Type: Application
    Filed: November 29, 2017
    Publication date: June 7, 2018
    Inventors: Hideki Mori, Jun Shirayanagi, Dai Kanai, Teppei Nagata, Kotaro Torikata, Makoto Matsuo, Kenta Koyama, Hideki Takaoka, Masatoshi Lin
  • Publication number: 20180157191
    Abstract: A developing device includes: a developer carrying member (sleeve); a regulating portion including an edge portion at a closest position to a surface of the sleeve or a flat portion tilted, at the closest position, by an angle of 2 degrees or less relative to a contact flat plane contacting the surface of the sleeve; and a rectifying portion connected with the edge or flat portion. The rectifying portion has a concavely curved surface such that a rate of a decrease in gap between the rectifying portion and the contact flat plane increases toward a downstream side of the developer feeding direction and is formed by smoothly connecting rectilinear or curved lines each of 0.2 mm or less except for the edge portion so that the gap between the rectifying portion and the contact flat plane is monotonically decreases toward the downstream side of the developer feeding direction.
    Type: Application
    Filed: January 10, 2018
    Publication date: June 7, 2018
    Inventors: Takeshi Yasumoto, Dai Kanai, Koichi Watanabe