Patents by Inventor Yuichiro Inaba

Yuichiro Inaba 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: 20240036497
    Abstract: An image forming apparatus includes a developer container to and from which a replenishment container is attachable and detachable and which includes an accommodating portion that accommodates developer and a replenishment port, an agitation member, an opening/closing member configured to be movable between a closed position and an open position, a drive source for driving the agitation member, and a control portion configured to control the drive source. The apparatus is configured such that image formation is not possible when the opening/closing member is at the open position, and the agitation member is capable of driving in a case where the opening/closing member is at the open position.
    Type: Application
    Filed: October 6, 2023
    Publication date: February 1, 2024
    Inventors: Tsuyoshi Ogawa, Masaaki Sato, Hiroshi Takarada, Koji Fujinaka, Akitoshi Toyota, Yuichiro Inaba, Kenichi Iida, Susumu Nittani
  • Patent number: 11809095
    Abstract: An image forming apparatus includes a developer container to and from which a replenishment container is attachable and detachable and which includes an accommodating portion that accommodates developer and a replenishment port, an agitation member, an opening/closing member configured to be movable between a closed position and an open position, a drive source for driving the agitation member, and a control portion configured to control the drive source. The apparatus is configured such that image formation is not possible when the opening/closing member is at the open position, and the agitation member is capable of driving in a case where the opening/closing member is at the open position.
    Type: Grant
    Filed: September 15, 2022
    Date of Patent: November 7, 2023
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tsuyoshi Ogawa, Masaaki Sato, Hiroshi Takarada, Koji Fujinaka, Akitoshi Toyota, Yuichiro Inaba, Kenichi Iida, Susumu Nittani
  • Patent number: 11803153
    Abstract: A process cartridge includes a photosensitive drum supported by the frame. A coupling is operatively connected to the photosensitive drum such that a driving force can be transferred from the coupling to the photosensitive drum, and a developing roller is supported by the frame. A first gear is operatively connected to the photosensitive drum and the developing roller such that the driving force can be transmitted from the coupling to the developing roller. A second gear is positioned at a side of the process cartridge, with the second gear having a plurality of teeth, with at least some of the teeth being exposed teeth that are uncovered by the frame and exposed to outside of the process cartridge, and with a tip of at least one of the exposed teeth facing an axis of the photosensitive drum.
    Type: Grant
    Filed: February 23, 2023
    Date of Patent: October 31, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryuta Murakami, Tadashi Horikawa, Shunsuke Uratani, Yuichiro Inaba
  • Publication number: 20230333511
    Abstract: A process cartridge includes a frame and a photosensitive drum supported by the frame, with the photosensitive drum being rotatable about an axis thereof. A coupling is operatively connected to the photosensitive drum such that a driving force can be transferred from the coupling to the photosensitive drum. A developing roller is supported by the frame, with the developing roller being rotatable about an axis thereof. A gear is positioned at a side of the process cartridge, with the gear being rotatable about an axis thereof. The gear has a plurality of teeth, with at least some of the teeth being exposed teeth that are uncovered by the frame and exposed to outside of the process cartridge, and with a tip of at least one of the exposed teeth facing the axis of the photosensitive drum. As measured in the axial direction of the photosensitive drum, the teeth of the gear are shorter than the projection of the coupling.
    Type: Application
    Filed: June 22, 2023
    Publication date: October 19, 2023
    Inventors: Ryuta Murakami, Tadashi Horikawa, Shunsuke Uratani, Yuichiro Inaba
  • Patent number: 11774905
    Abstract: A driving-force transmission member includes a coupling portion that includes a driving-force transmission surface and that transmits a driving force to a cartridge coupling, a first helical gear portion that engages with a driven gear of a cartridge to transmit the driving force, and a second helical gear portion that engages with a drive gear to receive the driving force. The portions rotate integrally with each other when the driving-force transmission member rotates about the axis of rotation. The driving-force transmission surface is shaped with a twist in the same direction as the driving-force transmission member. Helical teeth of the first helical gear portion are shaped with a twist in the same direction as the driving-force transmission surface. Helical teeth of the second helical gear portion are shaped with a twist in a direction opposite to the twist direction of the helical teeth of the first helical gear portion.
    Type: Grant
    Filed: August 24, 2020
    Date of Patent: October 3, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuichiro Inaba, Tetsuji Suzuki, Yoshihiro Ito, Ryuta Murakami
  • Publication number: 20230288844
    Abstract: A transfer unit transferring a developer image onto a transfer medium includes: an image bearing member on which the developer image is formed; a cleaning member provided to extend in a width direction of the image bearing member to abut against the image bearing member, and remove a developer on the image bearing member; and a seal member that prevents the developer removed by the cleaning member from leaking outside the transfer unit, the seal member is opposed to a tip portion of the cleaning member, the transfer unit further including a first unit provided with the image bearing member and the cleaning member, and a second unit that is provided with the seal member and can engage with the first unit, wherein the second unit engages with the first unit so that the seal member abuts against the cleaning member and the image bearing member.
    Type: Application
    Filed: February 17, 2023
    Publication date: September 14, 2023
    Inventors: YUICHIRO INABA, NORIHIRO MATSUMOTO
  • Patent number: 11720055
    Abstract: A process cartridge includes a frame, a photosensitive drum supported by the frame, and a developing roller supported by the frame. A coupling is operatively connected to the photosensitive drum, with the coupling being rotatable about an axis thereof, and with the coupling being positioned (i) at a first end of the photosensitive drum, (ii) coaxial with the photosensitive drum, and (iii) at a side of the process cartridge. A helical gear is positioned at the side of the process cartridge, the helical gear being rotatable about an axis thereof, the helical gear having a plurality of teeth, with at least some of the teeth being exposed teeth that are uncovered by the frame and exposed to outside of the process cartridge. As measured in an axial direction of the photosensitive drum, at least a part of the exposed teeth of the helical gear is positioned farther from the second end of the photosensitive drum than a tip of a projection of the coupling is positioned from the second end of the photosensitive drum.
    Type: Grant
    Filed: March 4, 2022
    Date of Patent: August 8, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryuta Murakami, Tadashi Horikawa, Shunsuke Uratani, Yuichiro Inaba
  • Publication number: 20230195032
    Abstract: To provide a structure for the process cartridge for receiving input of driving force from outside thereof. The main assembly of the electrophotographic image forming apparatus includes a driving output member provided with an output gear portion and an output coupling portion. The process cartridge that can be mounted to and dismounted from the main assembly of the electrophotographic image forming apparatus includes a photosensitive member, an input coupling portion provided at the end of the photosensitive member and capable of coupling with the output coupling portion, and an input gear portion capable of meshing with the output gear portion.
    Type: Application
    Filed: February 23, 2023
    Publication date: June 22, 2023
    Inventors: Ryuta Murakami, Tadashi Horikawa, Shunsuke Uratani, Yuichiro Inaba
  • Publication number: 20230134527
    Abstract: An image forming apparatus includes a developer container to and from which a replenishment container is attachable and detachable, the developer container including an accommodating portion, and a supporting portion, wherein the developer container includes a projection portion that is provided at one end portion thereof in the rotation axis direction of the developer bearing member and projects toward the supporting portion more than a center portion of the developer container in a crossing direction crossing the rotation axis direction, the projection portion communicates with the accommodating portion and includes, at a distal end portion thereof, an attachment portion configured such that the replenishment container is attachable thereto in a state of being exposed to the outside of the apparatus, and a replenishment port for replenishing the accommodating portion with developer from the replenishment container is defined in the attachment portion.
    Type: Application
    Filed: January 4, 2023
    Publication date: May 4, 2023
    Inventors: Koji Wada, Tsuyoshi Ogawa, Hiroshi Takarada, Kenji Matsuzaka, Takao Sameshima, Tomio Noguchi, Yuichiro Inaba, Kenichi Iida, Masaaki Sato
  • Patent number: 11614711
    Abstract: A process cartridge includes a frame, a photosensitive drum supported by the frame, and a developing roller supported by the frame. A coupling is operatively connected to the photosensitive drum, with the coupling being rotatable about an axis thereof, and with the coupling being positioned (i) at a first end of the photosensitive drum, (ii) coaxial with the photosensitive drum, and (iii) at a side of the process cartridge. A helical gear is positioned at the side of the process cartridge, the helical gear being rotatable about an axis thereof, the helical gear having a plurality of teeth, with at least some of the teeth being exposed teeth that are uncovered by the frame and exposed to outside of the process cartridge. As measured in an axial direction of the photosensitive drum, at least a part of the exposed teeth of the helical gear is positioned farther from the second end of the photosensitive drum than a tip of a projection of the coupling is positioned from the second end of the photosensitive drum.
    Type: Grant
    Filed: March 4, 2022
    Date of Patent: March 28, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryuta Murakami, Tadashi Horikawa, Shunsuke Uratani, Yuichiro Inaba
  • Publication number: 20230078527
    Abstract: An apparatus includes a developer container to and from which a replenishment container is attachable and detachable and which includes an accommodating portion and a replenishment port, a transfer portion configured to transfer a developer image on an image bearing member onto a recording material, a supporting tray including a supporting surface configured to support the recording material thereon, and a discharge portion configured to discharge the recording material, onto which the developer image has been transferred, on the supporting surface, wherein the supporting surface has an opening portion opening such that the replenishment port is exposed through the supporting surface, and wherein an opening/closing member configured to be movable between a closed position where the opening/closing member covers the replenishment port and serves as a part of the supporting surface and an open position where the replenishment port is exposed is provided.
    Type: Application
    Filed: November 22, 2022
    Publication date: March 16, 2023
    Inventors: Tomio Noguchi, Masaaki Sato, Kenji Matsuzaka, Koji Fujinaka, Takao Sameshima, Akitoshi Toyota, Yuichiro Inaba, Kenichi Iida
  • Patent number: 11599059
    Abstract: An image forming apparatus includes an image bearing member, a belt, a development unit having a development member in contact with the image bearing member to develop an electrostatic latent image formed on the image bearing member using toner, and a collection unit having a contacting member in contact with the belt to collect toner remaining on the belt adjacent to the contacting member. If condensation is detected inside the image forming apparatus, the image forming apparatus performs predetermined control to separate the development member from the image bearing member and drive the belt in such a manner that the belt moves at a second surface speed different from a first surface speed while driving the image bearing member in such a manner that the image bearing member rotates at the first surface speed in a state where the image bearing member is in contact with the belt.
    Type: Grant
    Filed: October 30, 2020
    Date of Patent: March 7, 2023
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinji Katagiri, Shuichi Tetsuno, Keisuke Ishizumi, Yuichiro Inaba
  • Patent number: 11573521
    Abstract: An image forming apparatus includes a developer container to and from which a replenishment container is attachable and detachable, the developer container including an accommodating portion, and a supporting portion, wherein the developer container includes a projection portion that is provided at one end portion thereof in the rotation axis direction of the developer bearing member and projects toward the supporting portion more than a center portion of the developer container in a crossing direction crossing the rotation axis direction, the projection portion communicates with the accommodating portion and includes, at a distal end portion thereof, an attachment portion configured such that the replenishment container is attachable thereto in a state of being exposed to the outside of the apparatus, and a replenishment port for replenishing the accommodating portion with developer from the replenishment container is defined in the attachment portion.
    Type: Grant
    Filed: September 13, 2021
    Date of Patent: February 7, 2023
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Koji Wada, Tsuyoshi Ogawa, Hiroshi Takarada, Kenji Matsuzaka, Takao Sameshima, Tomio Noguchi, Yuichiro Inaba, Kenichi Iida, Masaaki Sato
  • Publication number: 20230026290
    Abstract: An image forming apparatus includes a developer container to and from which a replenishment container is attachable and detachable and which includes an accommodating portion that accommodates developer and a replenishment port, an agitation member, an opening/closing member configured to be movable between a closed position and an open position, a drive source for driving the agitation member, and a control portion configured to control the drive source. The apparatus is configured such that image formation is not possible when the opening/closing member is at the open position, and the agitation member is capable of driving in a case where the opening/closing member is at the open position.
    Type: Application
    Filed: September 15, 2022
    Publication date: January 26, 2023
    Inventors: Tsuyoshi Ogawa, Masaaki Sato, Hiroshi Takarada, Koji Fujinaka, Akitoshi Toyota, Yuichiro Inaba, Kenichi Iida, Susumu Nittani
  • Patent number: 11556088
    Abstract: An apparatus includes a developer container to and from which a replenishment container is attachable and detachable and which includes an accommodating portion and a replenishment port, a transfer portion configured to transfer a developer image on an image bearing member onto a recording material, a supporting tray including a supporting surface configured to support the recording material thereon, and a discharge portion configured to discharge the recording material, onto which the developer image has been transferred, on the supporting surface, wherein the supporting surface has an opening portion opening such that the replenishment port is exposed through the supporting surface, and wherein an opening/closing member configured to be movable between a closed position where the opening/closing member covers the replenishment port and serves as a part of the supporting surface and an open position where the replenishment port is exposed is provided.
    Type: Grant
    Filed: September 13, 2021
    Date of Patent: January 17, 2023
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tomio Noguchi, Masaaki Sato, Kenji Matsuzaka, Koji Fujinaka, Takao Sameshima, Akitoshi Toyota, Yuichiro Inaba, Kenichi Iida
  • Patent number: 11520273
    Abstract: Provided is a driving force transmitting mechanism including: a first rotating member which rotates around a first rotation axial; a driving force transmitting member which rotates together with the first rotation member, and to which driving force is transmitted from the first rotating member; a cylindrical shaft which contacts with the first rotating member in a diameter direction, and which includes an engaging portion to engage with the driving force transmitting member, and is coaxially rotated with the first rotating member by the driving force from the driving force transmitting member at the engaging portion; and a second rotating member which is rotated around a second rotation axial, disposed next to the first rotation axis in an axial direction, by the driving force transmitted from the cylindrical shaft. The first rotating member includes at least one contacting portion that contacts with the second rotating member.
    Type: Grant
    Filed: August 17, 2021
    Date of Patent: December 6, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Fuyuko Koyama, Yuichiro Inaba
  • Publication number: 20220357692
    Abstract: A belt unit, for use in an image forming apparatus, includes an endless belt that moves in a movement direction, a transfer member, a collecting member, a storage container, and a conveyance member. The conveyance member conveys toner in a conveyance direction, rotates about a rotational axis extending in a rotational axis direction, includes a shaft and a conveyance portion provided on a shaft outer surface, and has a helical shape having a helical axis extending in the rotational axis direction. The conveyance member further includes a protruding portion protruding from the shaft outer surface in a direction crossing the conveyance member rotational axis, which has a shape different from the helical shape, and which is provided on a shaft portion downstream of the conveyance portion in the conveyance direction. The rotational axis direction is a direction crossing both the endless belt movement direction and a transfer member longitudinal direction.
    Type: Application
    Filed: July 22, 2022
    Publication date: November 10, 2022
    Inventors: Norihiro Matsumoto, Yuichiro Inaba, Akinori Mitsumata
  • Patent number: 11487222
    Abstract: An image forming apparatus includes a developer container to and from which the replenishment container is attachable and detachable and which includes an accommodating portion that accommodates developer and a replenishment port, an agitation member, an opening/closing member configured to be movable between a closed position and an open position, a drive source for driving the agitation member, and a control portion configured to control the drive source. The apparatus is configured such that image formation is not possible when the opening/closing member is at the open position, and the agitation member is capable of driving in a case where the opening/closing member is at the open position.
    Type: Grant
    Filed: September 13, 2021
    Date of Patent: November 1, 2022
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tsuyoshi Ogawa, Masaaki Sato, Hiroshi Takarada, Koji Fujinaka, Akitoshi Toyota, Yuichiro Inaba, Kenichi Iida, Susumu Nittani
  • Patent number: 11435679
    Abstract: A transfer unit, provided in an image forming apparatus having an image bearing member to bear a toner image, includes an endless belt, a transfer member, a collecting member, a storage container, a conveyance member, and a detection unit. The transfer member transfers the toner image from the image bearing member to the endless belt. The collecting member recovers toner remaining on the endless belt. The conveyance member rotates to convey toner from an inflow port inside the storage container. The detection unit detects a load which the conveyance member receives when rotating. The rotational axis direction is a direction which is perpendicular to neither a movement direction of the endless belt nor a width direction perpendicular to the movement direction of the endless belt. The conveyance member includes a force receiving portion configured to receive a force from the toner conveyed in a state the conveyance member is rotating.
    Type: Grant
    Filed: July 13, 2020
    Date of Patent: September 6, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Norihiro Matsumoto, Yuichiro Inaba, Akinori Mitsumata
  • Patent number: 11402798
    Abstract: A process cartridge includes a frame having a slit and a recess formed therein at a side of the process cartridge. A photosensitive drum is supported by the frame, with the photosensitive drum being rotatable about an axis thereof, the photosensitive drum including a first end and a second end opposite to the first end. A developing roller is also supported by the frame, the developing roller being rotatable about an axis thereof. A coupling is operatively connected to the photosensitive drum, with the coupling being rotatable about an axis thereof. A helical gear is positioned at the side of the process cartridge, with the helical gear being rotatable about an axis thereof. The helical gear has a plurality of teeth, with at least some of the teeth being exposed teeth that are uncovered by the frame and exposed to outside of the process cartridge.
    Type: Grant
    Filed: May 27, 2021
    Date of Patent: August 2, 2022
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryuta Murakami, Tadashi Horikawa, Shunsuke Uratani, Yuichiro Inaba