Patents by Inventor Haruhiko Omata

Haruhiko Omata 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: 20200242426
    Abstract: A image forming apparatus includes: an image bearing member; a transfer member configured to transfer a toner image carried on the image bearing member to a sheet by being applied with a voltage; a controller configured to execute a mode of outputting a test chart for setting a voltage to be applied to the transfer member during image formation, the mode being a mode of transferring a plurality of test images to the test chart by applying a plurality of different voltages to the transfer member; and an operation portion capable of setting a type of a sheet on which the mode is executed; wherein the controller is configured to preset a voltage value for setting a voltage to be applied when the test images are transferred in the mode based on a voltage value, which is set in the previous mode.
    Type: Application
    Filed: January 21, 2020
    Publication date: July 30, 2020
    Inventor: Haruhiko Omata
  • Publication number: 20200242428
    Abstract: An image forming apparatus includes: an image bearing member; a transfer member; and a controller configured to execute a plurality of modes of outputting a test chart, the modes being a mode of transferring a plurality of test images to the test chart by applying a plurality of different voltages to the transfer member; wherein the modes include a first mode and a second mode, the first mode being a mode in which a number of voltage levels to be applied to the transfer member when the plurality of test images are transferred to the test chart is a first predetermined number, the second mode being a mode in which the number of voltage levels to be applied to the transfer member when the plurality of test images are transferred to the test chart is a second predetermined number which is greater than the first predetermined number.
    Type: Application
    Filed: January 21, 2020
    Publication date: July 30, 2020
    Inventor: Haruhiko Omata
  • Publication number: 20200166881
    Abstract: An image forming apparatus includes an image bearing member; an image transfer device for transferring a toner image from aid image bearing member to a sheet; an application device for applying a transfer voltage to the image transfer device; and a controller for controlling an output mode operation for outputting a predetermined chart in which test halftone toner images transferred with different transfer voltages are formed to adjust the transfer voltage. When outputting a maximum size of the chart, the controller forms the test toner images in a region within 50 mm from an edge in a width direction perpendicular to a feeding direction of the sheet.
    Type: Application
    Filed: November 19, 2019
    Publication date: May 28, 2020
    Inventors: Haruhiko Omata, Tatsuomi Murayama
  • Patent number: 10585376
    Abstract: An image forming apparatus includes a controller configured to control a first and a second voltage applied to a transfer device when transferring an image to a first and a second side of a recording material, respectively. The controller controls a mode that outputs a test chart on which at least one of a plurality of first test images for adjusting the first voltage and a plurality of second test images for adjusting the second voltage is formed. In a case of forming the second test images on a second side of the test chart, and before forming the second test images, the controller forms a plurality of predetermined toner images under a same image forming condition on a first side of the test chart so that the predetermined toner images are formed on a plurality of predetermined areas overlapping each area where the second test images are to be formed.
    Type: Grant
    Filed: October 1, 2018
    Date of Patent: March 10, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuomi Murayama, Haruhiko Omata
  • Publication number: 20190107797
    Abstract: An image forming apparatus including a controller configured to control a first and a second voltage applied to a transfer device when transferring an image to a first and a second side of a recording material, respectively, the controller performing a mode that outputs a test chart on which at least one of a plurality of first test images for adjusting the first voltage and a plurality of second test images for adjusting the second voltage is formed, wherein in a case of forming the second test images on a second side of the test chart, and before forming the second test images, the controller forms a plurality of predetermined toner images under a same image forming condition on a first side of the test chart so that predetermined toner images are formed on a plurality of predetermined areas overlapping each area where the second test images to be formed.
    Type: Application
    Filed: October 1, 2018
    Publication date: April 11, 2019
    Inventors: Tatsuomi Murayama, Haruhiko Omata
  • Patent number: 9927741
    Abstract: An image forming apparatus includes an intermediary transfer member, a toner image forming unit, a rotatable transfer member, a cleaning unit, a feeding unit, a feeding portion and an executing portion configured to execute a supplying operation for supplying a supplying toner image to a cleaning portion. The executing portion forms the supplying toner image at a position including a position different from a position where an adjusting toner image for adjusting an image forming condition is formed, with respect to a widthwise direction crossing a movement direction of an intermediary transfer member provided in contact with the rotatable transfer member. The executing portion performs the supplying operation at least one time in a double-sided image forming job and does not perform the supplying operation in a single-sided image forming job.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: March 27, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiro Noguchi, Haruhiko Omata, Tatsuomi Murayama, Yasuki Kamimori
  • Patent number: 9766574
    Abstract: When a drive roller is at a stopped state, an execution portion executes a move mode in which a time from when a rotation of a drive roller has been stopped is measured, and based on the measured result, rotation of the drive roller is started and stopped. In the move mode, a portion of a secondary transfer belt having been at a first contact position in the stopped state is moved to a position other than the first contact position and the second contact position, and the rotation of the drive roller is stopped.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: September 19, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Haruhiko Omata, Tatsuomi Murayama
  • Patent number: 9760041
    Abstract: An image forming apparatus includes a movable intermediary transfer member, a toner image forming unit, a rotatable transfer member, a fixing unit, a recording material feeding portion, an executing portion, and first and second cleaning units. The first cleaning unit includes a first brush roller, a first rotatable member and a first blade member. The second cleaning unit includes a second brush roller, a second rotatable member, a second blade member and a third blade member. The third blade member is disposed downstream of the cleaning portion and upstream of a contact portion, between the second rotatable member and the second brush roller, with respect to a rotational direction of the second rotatable member, and scrapes a deposited matter off the second rotatable member with the rotation of the second rotatable member.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: September 12, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Haruhiko Omata, Akihiro Noguchi, Tatsuomi Murayama, Yasuki Kamimori
  • Patent number: 9658577
    Abstract: An image forming apparatus includes: an image bearing member; a toner image forming unit; an endless transfer belt; a transfer roller urged from an inner peripheral surface of the transfer belt toward the image bearing member via the transfer belt; a feeding surface forming roller, provided downstream of the transfer roller with respect to a traveling direction of the transfer belt, having such a shape that a diameter at each of end portions is smaller than a diameter at a central portion with respect to a rotational axis direction; and a stretching roller, downstream of the feeding surface forming roller with respect to the traveling direction of the transfer belt, having such a shape that a diameter at each of end portions is larger than a diameter at a central portion with respect to the rotational axis direction.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: May 23, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yutaka Kakehi, Hiroshi Kokubo, Haruhiko Omata, Takashi Fujita, Hideaki Kosasa
  • Publication number: 20170003624
    Abstract: An image forming apparatus includes a movable intermediary transfer member, a toner image forming unit, a rotatable transfer member, a fixing unit, a recording material feeding portion, an executing portion, and first and second cleaning units. The first cleaning unit includes a first brush roller, a first rotatable member and a first blade member. The second cleaning unit includes a second brush roller, a second rotatable member, a second blade member and a third blade member. The third blade member is disposed downstream of the cleaning portion and upstream of a contact portion, between the second rotatable member and the second brush roller, with respect to a rotational direction of the second rotatable member, and scrapes a deposited matter off the second rotatable member with the rotation of the second rotatable member.
    Type: Application
    Filed: June 28, 2016
    Publication date: January 5, 2017
    Inventors: Haruhiko Omata, Akihiro Noguchi, Tatsuomi Murayama, Yasuki Kamimori
  • Publication number: 20170003623
    Abstract: An image forming apparatus includes an intermediary transfer member, a toner image forming unit, a rotatable transfer member, a cleaning unit, a feeding unit, a feeding portion and an executing portion configured to execute a supplying operation for supplying a supplying toner image to a cleaning portion. The executing portion forms the supplying toner image at a position including a position different from a position where an adjusting toner image for adjusting an image forming condition is formed, with respect to a widthwise direction crossing a movement direction of an intermediary transfer member provided in contact with the rotatable transfer member. The executing portion performs the supplying operation at least one time in a double-sided image forming job and does not perform the supplying operation in a single-sided image forming job.
    Type: Application
    Filed: June 28, 2016
    Publication date: January 5, 2017
    Inventors: Akihiro Noguchi, Haruhiko Omata, Tatsuomi Murayama, Yasuki Kamimori
  • Patent number: 9417563
    Abstract: Relationships of LB1>LR1 and LN1<LN2 are satisfied, where LB1 is a length of a first contact area in which a first brush roller and an endless belt come into contact with each other. LR1 is a length of a second contact area in which the first roller and the endless belt come into contact with each other. LN1 is a length of an area in which the first contact area and the second contact area overlap with each other. A third contact area is an area in which the second brush roller and the endless belt come into contact with each other. A fourth contact area is an area in which the second roller and the endless belt come into contact with each other. LN2 is a length of an area in which the third contact area and the fourth contact area overlap with each other.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: August 16, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Haruhiko Omata, Tatsuomi Murayama
  • Patent number: 9389544
    Abstract: A controller measures a stop duration time when an intermediate transfer belt and a secondary transfer belt are stopped, and based on a measurement result, rotates and stops the intermediate transfer belt such that the stretched position by stretch rollers of the intermediate transfer belt is changed. At the same time, the controller rotates and stops the secondary transfer belt such that a stretched position by stretch rollers of the secondary transfer belt is changed. A time from starting to stopping the rotation of the intermediate transfer belt and a time from starting to stopping the rotation of the secondary transfer belt are overlapped.
    Type: Grant
    Filed: September 21, 2015
    Date of Patent: July 12, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuomi Murayama, Haruhiko Omata
  • Publication number: 20160091834
    Abstract: A controller measures a stop duration time when an intermediate transfer belt and a secondary transfer belt are stopped, and based on a measurement result, rotates and stops the intermediate transfer belt such that the stretched position by stretch rollers of the intermediate transfer belt is changed. At the same time, the controller rotates and stops the secondary transfer belt such that a stretched position by stretch rollers of the secondary transfer belt is changed. A time from starting to stopping the rotation of the intermediate transfer belt and a time from starting to stopping the rotation of the secondary transfer belt are overlapped with the other.
    Type: Application
    Filed: September 21, 2015
    Publication date: March 31, 2016
    Inventors: Tatsuomi MURAYAMA, Haruhiko Omata
  • Publication number: 20160091836
    Abstract: When a drive roller is at a stopped state, an execution portion executes a move mode in which a time from when a rotation of a drive roller has been stopped is measured, and based on the measured result, rotation of the drive roller is started and stopped. In the move mode, a portion of a secondary transfer belt having been at a first contact position in the stopped state is moved to a position other than the first contact position and the second contact position, and the rotation of the drive roller is stopped.
    Type: Application
    Filed: September 21, 2015
    Publication date: March 31, 2016
    Inventors: Haruhiko OMATA, Tatsuomi Murayama
  • Publication number: 20160091832
    Abstract: Relationships of LB1>LR1 and LN1<LN2 are satisfied, where LB1 is a length of a first contact area in which a first brush roller and an endless belt come into contact with each other. LR1 is a length of a second contact area in which the first roller and the endless belt come into contact with each other. LN1 is a length of an area in which the first contact area and the second contact area overlap with each other. A third contact area is an area in which the second brush roller and the endless belt come into contact with each other. A fourth contact area is an area in which the second roller and the endless belt come into contact with each other. LN2 is a length of an area in which the third contact area and the fourth contact area overlap with each other.
    Type: Application
    Filed: September 18, 2015
    Publication date: March 31, 2016
    Inventors: Haruhiko Omata, Tatsuomi Murayama
  • Patent number: 9239551
    Abstract: A conveying belt is disposed so as to guide a recording medium on a side opposite to an image carrying belt across an extension line of a stretch surface formed by a transfer nip and a pressure member. Thus, the recording medium delivered from the transfer nip is guided on the side opposite to the image carrying belt across the extension line of the stretch surface. Therefore, even in a case of guiding a recording medium whose bending rigidity is high in particular, it is possible to suppress a rear end of the recording medium to move in a direction of separating from the image carrying belt at upstream of the transfer nip.
    Type: Grant
    Filed: March 30, 2015
    Date of Patent: January 19, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Haruhiko Omata
  • Publication number: 20150286166
    Abstract: An image forming apparatus includes: an image bearing member; a toner image forming unit; an endless transfer belt; a transfer roller urged from an inner peripheral surface of the transfer belt toward the image bearing member via the transfer belt; a feeding surface forming roller, provided downstream of the transfer roller with respect to a traveling direction of the transfer belt, having such a shape that a diameter at each of end portions is smaller than a diameter at a central portion with respect to a rotational axis direction; and a stretching roller, downstream of the feeding surface forming roller with respect to the traveling direction of the transfer belt, having such a shape that a diameter at each of end portions is larger than a diameter at a central portion with respect to the rotational axis direction.
    Type: Application
    Filed: April 1, 2015
    Publication date: October 8, 2015
    Inventors: Hiroshi KOKUBO, Yutaka Kakehi, Haruhiko Omata, Takashi Fujita, Hideaki Kosasa
  • Publication number: 20150286167
    Abstract: A conveying belt is disposed so as to guide a recording medium on a side opposite to an image carrying belt across an extension line of a stretch surface formed by a transfer nip and a pressure member. Thus, the recording medium delivered from the transfer nip is guided on the side opposite to the image carrying belt across the extension line of the stretch surface. Therefore, even in a case of guiding a recording medium whose bending rigidity is high in particular, it is possible to suppress a rear end of the recording medium to move in a direction of separating from the image carrying belt at upstream of the transfer nip.
    Type: Application
    Filed: March 30, 2015
    Publication date: October 8, 2015
    Inventor: Haruhiko OMATA
  • Patent number: 8634753
    Abstract: An image forming apparatus includes a transparent image forming device for forming a transparent toner image on a sheet with a transparent toner in an amount per unit area; a manual selector for selecting an image area in which the transparent toner image is to be formed and for selecting the amount per unit area; a heating device for heating the transparent toner image formed on the sheet; a glossing device for processing the transparent toner image formed on the sheet so that glossiness is higher than that by the heating device; a mode selector for selecting a first mode in which the glossing device is not used and a second mode in which the glossing device is used; and a controlling device for controlling the amount per unit area of the transparent toner in the image area so as to be not less than a predetermined amount in the second mode.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: January 21, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventor: Haruhiko Omata