Patents by Inventor Yuusuke Torimaru

Yuusuke Torimaru 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: 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
  • 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
  • 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: 20160274501
    Abstract: An image forming apparatus includes image bearing members; an image forming unit; a movable endless belt, transfer members provided in contact with an inner peripheral surface of the belt and in neighborhoods of the transfer portions, wherein each of the transfer members is disposed at a position shifted toward a downstream side relative to an associated contact portion with respect to a movement direction of the belt, a voltage source, and an urging member for urging the belt to an associated image bearing member in contact with the inner peripheral surface of the belt. The urging member is provided correspondingly to at least one of the image bearing members.
    Type: Application
    Filed: March 15, 2016
    Publication date: September 22, 2016
    Inventor: Yuusuke Torimaru
  • Patent number: 8838012
    Abstract: An image forming apparatus includes an image bearing member; a stretched rotatable belt member; a transfer device for forming a transfer portion where a toner image is transferred from the image bearing member onto a recording material carried and conveyed on the belt member; a separation roller capable of separating the recording material from the belt member; a push-up device capable of pushing up a belt surface locally with respect to a widthwise direction of the belt member to separate the recording material from the belt member; and an execution portion for executing, when an abnormality occurs during an image forming operation, an operation in a stop mode in which the belt member is, after the image forming operation is stopped, rotated in a push-up state of the push-up device and then the rotation of the belt member is stopped.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: September 16, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuusuke Torimaru
  • Patent number: 8639137
    Abstract: An image forming apparatus includes an intermediary transfer member having an elastic layer; a toner image forming portion for forming a toner image for an image to be carried on the intermediary transfer member; a transfer member, which presses the intermediary transfer member, for transferring the toner image for the image from the intermediary transfer member onto a recording material; a pressing mechanism capable of changing pressure applied from the transfer member to the intermediary transfer member; and a controller for controlling the toner image forming portion so that a length of the toner image for the image on the intermediary transfer member with respect to a rotational direction of the intermediary transfer member is decreased with an increase of the pressure.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: January 28, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuusuke Torimaru
  • Patent number: 8577268
    Abstract: An image forming apparatus comprising: an image bearing member; a conveying member; a transfer means; an attraction means, which is disposed upstream of the transfer means in a conveying direction of the transfer material, for attracting the transfer material onto the conveying member; and a winding means, which is disposed downstream of the transfer means in the conveying direction of the transfer material, for winding the conveying member, wherein a contact amount between the conveying member and the winding means corresponding to a first region where a width of the attraction means pressing the conveying member in the conveying direction is smaller than the contact amount between the conveying member and the winding means corresponding to a second region in which a width of the attraction means which presses the conveying member in the conveying direction that is smaller than the first width.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: November 5, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuusuke Torimaru
  • Patent number: 8532518
    Abstract: An image forming apparatus includes an image bearing member; an image forming portion for forming a toner image on the image bearing member, the image forming portion being capable of forming an image to be formed on a recording material and forming a control image for controlling an image density at a position adjacent to the image to be formed on the recording material; an intermediary transfer member rotatable while carrying the toner image transferred from the image bearing member; a transfer member for forming a transfer portion where the toner image is to be transferred from the intermediary transfer member onto the recording material; an electrostatic cleaning member for electrostatically removing the toner deposited on the transfer member; a density detecting portion, provided upstream of the transfer member with respect to a rotational direction of the intermediary transfer member, for detecting a density of the control image transferred on the intermediary transfer member; an adjusting portion for a
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: September 10, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuusuke Torimaru
  • Patent number: 8369729
    Abstract: An image forming apparatus includes an image forming device for forming a toner image on an image conveying member on the basis of an input image signal; a transfer device for transferring the toner image from the image conveying member onto an image receiving member; a bias applying device for applying a transfer bias to the transfer device when the toner image is transferred from the image conveying member onto the image receiving member; an executing portion for executing a test mode in which a test image is formed on the image conveying member and is then transferred onto the image receiving member; a detecting device for detecting a current passing through the transfer device in the test mode; a control device for controlling an image forming condition of the image forming device on the basis of an output of the detecting device; and a setting device for setting a test bias to be applied from the bias applying device at a value larger than the transfer bias in terms of an absolute value.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: February 5, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuusuke Torimaru
  • Publication number: 20120155897
    Abstract: An image forming apparatus includes an intermediary transfer member having an elastic layer; a toner image forming portion for forming a toner image for an image to be carried on the intermediary transfer member; a transfer member, which presses the intermediary transfer member, for transferring the toner image for the image from the intermediary transfer member onto a recording material; a pressing mechanism capable of changing pressure applied from the transfer member to the intermediary transfer member; and a controller for controlling the toner image forming portion so that a length of the toner image for the image on the intermediary transfer member with respect to a rotational direction of the intermediary transfer member is decreased with an increase of the pressure.
    Type: Application
    Filed: December 14, 2011
    Publication date: June 21, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Yuusuke Torimaru
  • Publication number: 20120155902
    Abstract: An image forming apparatus includes an image bearing member; a stretched rotatable belt member; a transfer device for forming a transfer portion where a toner image is transferred from the image bearing member onto a recording material carried and conveyed on the belt member; a separation roller capable of separating the recording material from the belt member; a push-up device capable of pushing up a belt surface locally with respect to a widthwise direction of the belt member to separate the recording material from the belt member; and an execution portion for executing, when an abnormality occurs during an image forming operation, an operation in a stop mode in which the belt member is, after the image forming operation is stopped, rotated in a push-up state of the push-up device and then the rotation of the belt member is stopped.
    Type: Application
    Filed: December 13, 2011
    Publication date: June 21, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Yuusuke Torimaru
  • Patent number: 8135303
    Abstract: In an image forming apparatus, when backside contamination of a recording material occurs, a control portion carries out control so that a plurality of restoring toner bands having a length L1 longer than a circumference L3 of a secondary transfer roller is formed at an interval L2 at positions in which the restoring toner bands can overlap with control images with respect to a longitudinal direction of the secondary transfer roller and then is transferred onto the secondary transfer roller through an intermediary transfer belt. The restoring toner bands transferred onto the secondary transfer roller stagnate on a fur brush rubbing against the secondary transfer roller to remove an electric discharge product deposited on the secondary transfer roller. The toner stagnating on the fur brush is inverted in charge polarity and then is re-transferred onto the intermediary transfer belt through the secondary transfer roller.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: March 13, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryuta Ai, Yuusuke Torimaru
  • Publication number: 20120027442
    Abstract: An image forming apparatus includes an image bearing member; an image forming portion for forming a toner image on the image bearing member, the image forming portion being capable of forming an image to be formed on a recording material and forming a control image for controlling an image density at a position adjacent to the image to be formed on the recording material; an intermediary transfer member rotatable while carrying the toner image transferred from the image bearing member; a transfer member for forming a transfer portion where the toner image is to be transferred from the intermediary transfer member onto the recording material; an electrostatic cleaning member for electrostatically removing the toner deposited on the transfer member; a density detecting portion, provided upstream of the transfer member with respect to a rotational direction of the intermediary transfer member, for detecting a density of the control image transferred on the intermediary transfer member; an adjusting portion for a
    Type: Application
    Filed: July 27, 2011
    Publication date: February 2, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Yuusuke Torimaru
  • Patent number: 8095032
    Abstract: When a switch displayed on an operation panel is operated, a control portion starts aging control in which image formation is stopped and yellow toner is applied onto an intermediary transfer belt and a secondary transfer roller. A toner band is formed, on full circumference of the intermediary transfer belt at a position in which toner images for control are formed, with a width correspondingly to widths of the toner images for control.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: January 10, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuusuke Torimaru, Ryuta Ai
  • Publication number: 20110142502
    Abstract: An image forming apparatus comprising: an image bearing member; a conveying member; a transfer means; an attraction means, which is disposed upstream of the transfer means in a conveying direction of the transfer material, for attracting the transfer material onto the conveying member; and a winding means, which is disposed downstream of the transfer means in the conveying direction of the transfer material, for winding the conveying member, wherein a contact amount between the conveying member and the winding means corresponding to a first region where a width of the attraction means pressing the conveying member in the conveying direction is smaller than the contact amount between the conveying member and the winding means corresponding to a second region in which a width of the attraction means which presses the conveying member in the conveying direction that is smaller than the first width.
    Type: Application
    Filed: December 8, 2010
    Publication date: June 16, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Yuusuke Torimaru
  • Publication number: 20100322652
    Abstract: An image forming apparatus includes an image forming device for forming a toner image on an image conveying member on the basis of an input image signal; a transfer device for transferring the toner image from the image conveying member onto an image receiving member; a bias applying device for applying a transfer bias to the transfer device when the toner image is transferred from the image conveying member onto the image receiving member; an executing portion for executing a test mode in which a test image is formed on the image conveying member and is then transferred onto the image receiving member; a detecting device for detecting a current passing through the transfer device in the test mode; a control device for controlling an image forming condition of the image forming device on the basis of an output of the detecting device; and a setting device for setting a test bias to be applied from the bias applying device at a value larger than the transfer bias in terms of an absolute value.
    Type: Application
    Filed: June 11, 2010
    Publication date: December 23, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Yuusuke Torimaru
  • Patent number: 7848669
    Abstract: An image forming apparatus includes an image bearing member for bearing a toner image, a transfer member for forming a transfer portion for transferring the toner image onto a recording material in contact with the image bearing member, a vibration imparting portion for imparting vibration at a variable frequency to the recording material having passed through the transfer portion, and a control portion for controlling the frequency by the vibration imparting portion so that the frequency is decreased with an increasing length of the recording material having passed through the transfer portion during a process of passing the recording material through the transfer portion.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: December 7, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventor: Yuusuke Torimaru
  • Publication number: 20090290892
    Abstract: An image forming apparatus includes an image bearing member for bearing a toner image, a transfer member for forming a transfer portion for transferring the toner image onto a recording material in contact with the image bearing member, a vibration imparting portion for imparting vibration at a variable frequency to the recording material having passed through the transfer portion, and a control portion for controlling the frequency by the vibration imparting portion so that the frequency is decreased with an increasing length of the recording material having passed through the transfer portion during a process of passing the recording material through the transfer portion.
    Type: Application
    Filed: November 12, 2008
    Publication date: November 26, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Yuusuke Torimaru
  • Publication number: 20090190951
    Abstract: When a switch displayed on an operation panel is operated, a control portion starts aging control in which image formation is stopped and yellow toner is applied onto an intermediary transfer belt and a secondary transfer roller. A toner band is formed, on full circumference of the intermediary transfer belt at a position in which toner images for control are formed, with a width correspondingly to widths of the toner images for control.
    Type: Application
    Filed: January 29, 2009
    Publication date: July 30, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yuusuke Torimaru, Ryuta Ai
  • Publication number: 20090190950
    Abstract: In an image forming apparatus, when backside contamination of a recording material occurs, a control portion carries out control so that a plurality of restoring toner bands having a length L1 longer than a circumference L3 of a secondary transfer roller is formed at an interval L2 at positions in which the restoring toner bands can overlap with control images with respect to a longitudinal direction of the secondary transfer roller and then is transferred onto the secondary transfer roller through an intermediary transfer belt. The restoring toner bands transferred onto the secondary transfer roller stagnate on a fur brush rubbing against the secondary transfer roller to remove an electric discharge product deposited on the secondary transfer roller. The toner stagnating on the fur brush is inverted in charge polarity and then is re-transferred onto the intermediary transfer belt through the secondary transfer roller.
    Type: Application
    Filed: January 29, 2009
    Publication date: July 30, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Ryuta Ai, Yuusuke Torimaru