Patents by Inventor Keisuke Endoh
Keisuke Endoh 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).
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Patent number: 10656547Abstract: Provided is an image forming apparatus, including an apparatus main body, an image bearing member unit having at least an image bearing member and a charging member, and a developing unit having at least a developer bearing member. The apparatus main body has a controller, the image bearing member unit further has a first storage unit that stores first correction information corresponding to life information of the developing unit, the developing unit further has a second storage unit that stores second correction information corresponding to life information of the developing unit, and the controller acquires the first correction information and the second correction information, uses the acquired first correction information and the acquired second correction information to correct a charging bias to be applied to the charging member, and applies the corrected charging bias to the charging member.Type: GrantFiled: January 22, 2019Date of Patent: May 19, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Shuhei Kawasaki, Kodai Hayashi, Shinichi Agata, Keisuke Endoh
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Patent number: 10649384Abstract: An image bearing member unit and a developing unit are respectively configured to be attachable to and detachable from an apparatus main body of an image forming apparatus, the image bearing member unit has a first memory that stores information related to a toner amount during a toner supply in accordance with a use amount of the image bearing member unit, the developing unit has a second memory that stores information related to a toner amount during the toner supply in accordance with a use amount of the developing unit, and a control device controls, during the toner supply, the toner supply with a toner amount based on the information stored in the first memory and the information stored in the second memory.Type: GrantFiled: January 22, 2019Date of Patent: May 12, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Kodai Hayashi, Taku Watanabe, Shuhei Kawasaki, Keisuke Endoh
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Patent number: 10579001Abstract: An image forming unit forms an image on a sheet. A reverse unit pulls in the sheet from a main conveyance path and reverses a conveyance direction of the sheet to feed the sheet to a sub-conveyance path. A control unit causes a conveyance unit to convey a first sheet that is waiting to the main conveyance path after a trailing end of a second sheet that has been fed from a feeding unit and follows the first sheet has passed through a merging point, and moves a trailing end of the first sheet downstream of a branch point before the second sheet reaches the branch point.Type: GrantFiled: November 21, 2017Date of Patent: March 3, 2020Assignee: CANON KABUSHIKI KAISHAInventors: Keisuke Endoh, Hiroshi Hagiwara
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Publication number: 20190227476Abstract: An image bearing member unit and a developing unit are respectively configured to be attachable to and detachable from an apparatus main body of an image forming apparatus, the image bearing member unit has a first memory that stores information related to a toner amount during a toner supply in accordance with a drive amount of the image bearing member, the developing unit has a second memory that stores information related to a toner amount during the toner supply in accordance with a use amount of the developing unit, and a control device controls, during the toner supply, the toner supply with a toner amount based on the information stored in the first memory and the information stored in the second memory.Type: ApplicationFiled: January 22, 2019Publication date: July 25, 2019Inventors: Kodai Hayashi, Taku Watanabe, Shuhei Kawasaki, Keisuke Endoh
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Publication number: 20190227454Abstract: Provided is an image forming apparatus, including an apparatus main body, an image bearing member unit having at least an image bearing member and a charging member, and a developing unit having at least a developer bearing member. The apparatus main body has a controller, the image bearing member unit further has a first storage unit that stores first correction information corresponding to life information of the developing unit, the developing unit further has a second storage unit that stores second correction information corresponding to life information of the developing unit, and the controller acquires the first correction information and the second correction information, uses the acquired first correction information and the acquired second correction information to correct a charging bias to be applied to the charging member, and applies the corrected charging bias to the charging member.Type: ApplicationFiled: January 22, 2019Publication date: July 25, 2019Inventors: Shuhei Kawasaki, Kodai Hayashi, Shinichi Agata, Keisuke Endoh
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Patent number: 10324406Abstract: An image forming apparatus includes a member for use in forming an image, an acquiring unit, a scanning unit, and a control unit. The acquiring unit is configured to acquire first image information on the image formed on a recording material. The scanning unit is configured to scan the image formed on the recording material to acquire second image information. The control unit is configured to compare the first image information acquired by the acquiring unit with the second image information acquired by the scanning unit to determine a state of the member based on a comparison result.Type: GrantFiled: January 21, 2016Date of Patent: June 18, 2019Assignee: Canon Kabushiki KaishaInventors: Keisuke Endoh, Hideyuki Matsubara, Takeshi Sugita
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Patent number: 10042300Abstract: A CPU selects which speed to execute a contact control of photosensitive drums and developing rollers of a plurality of process stations at, a normal speed or a speed higher than the normal speed. The CPU selects which speed to execute a separation control of the photosensitive drums and the developing rollers of the plurality of process stations at, a normal speed or a speed higher than the normal speed. The CPU further selects contact controls and separation controls so that a difference between the number of times of execution of the contact control at the speed higher than the normal speed and the number of times of execution of the separation control at the speed higher than the normal speed becomes less than or equal to a predetermined number of times.Type: GrantFiled: September 12, 2017Date of Patent: August 7, 2018Assignee: Canon Kabushiki KaishaInventor: Keisuke Endoh
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Publication number: 20180157200Abstract: An image forming unit forms an image on a sheet. A reverse unit pulls in the sheet from a main conveyance path and reverses a conveyance direction of the sheet to feed the sheet to a sub-conveyance path. A control unit causes a conveyance unit to convey a first sheet that is waiting to the main conveyance path after a trailing end of a second sheet that has been fed from a feeding unit and follows the first sheet has passed through a merging point, and moves a trailing end of the first sheet downstream of a branch point before the second sheet reaches the branch point.Type: ApplicationFiled: November 21, 2017Publication date: June 7, 2018Inventors: Keisuke Endoh, Hiroshi Hagiwara
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Publication number: 20180074448Abstract: A CPU selects which speed to execute a contact control of photosensitive drums and developing rollers of a plurality of process stations at, a normal speed or a speed higher than the normal speed. The CPU selects which speed to execute a separation control of the photosensitive drums and the developing rollers of the plurality of process stations at, a normal speed or a speed higher than the normal speed. The CPU further selects contact controls and separation controls so that a difference between the number of times of execution of the contact control at the speed higher than the normal speed and the number of times of execution of the separation control at the speed higher than the normal speed becomes less than or equal to a predetermined number of times.Type: ApplicationFiled: September 12, 2017Publication date: March 15, 2018Inventor: Keisuke Endoh
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Publication number: 20180039213Abstract: An image forming apparatus includes a member for use in forming an image, an acquiring unit, a scanning unit, and a control unit. The acquiring unit is configured to acquire first image information on the image formed on a recording material. The scanning unit is configured to scan the image formed on the recording material to acquire second image information. The control unit is configured to compare the first image information acquired by the acquiring unit with the second image information acquired by the scanning unit to determine a state of the member based on a comparison result.Type: ApplicationFiled: January 21, 2016Publication date: February 8, 2018Inventors: Keisuke Endoh, Hideyuki Matsubara, Takeshi Sugita
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Patent number: 8706009Abstract: The image forming apparatus includes a discharge execution section for forcedly discharging toner from a developing device and forming a toner image on a photosensitive drum, in which a primary transfer roller transfers the toner image formed on the photosensitive drum by the discharge execution section by applying, to a predetermined area part of the toner image, a first transfer bias having a predetermined transfer efficiency with respect to an intermediate transfer belt and applying, to a part excluding the predetermined area part of the toner image, a second transfer bias whose transfer efficiency is at least smaller than the predetermined transfer efficiency of the first transfer bias.Type: GrantFiled: August 26, 2011Date of Patent: April 22, 2014Assignee: Canon Kabushiki KaishaInventor: Keisuke Endoh
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Patent number: 8666290Abstract: The image forming apparatus includes a discharge execution section for forcedly discharging toner from a developing device and forming a toner image on a photosensitive drum, in which a primary transfer roller transfers the toner image formed on the photosensitive drum by the discharge execution section by applying, to a predetermined area part of the toner image, a first transfer bias having a predetermined transfer efficiency with respect to an intermediate transfer belt and applying, to a part excluding the predetermined area part of the toner image, a second transfer bias whose transfer efficiency is at least smaller than the predetermined transfer efficiency of the first transfer bias.Type: GrantFiled: August 26, 2011Date of Patent: March 4, 2014Assignee: Canon Kabushiki KaishaInventor: Keisuke Endoh
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Publication number: 20120057892Abstract: The image forming apparatus includes a discharge execution section for forcedly discharging toner from a developing device and forming a toner image on a photosensitive drum, in which a primary transfer roller transfers the toner image formed on the photosensitive drum by the discharge execution section by applying, to a predetermined area part of the toner image, a first transfer bias having a predetermined transfer efficiency with respect to an intermediate transfer belt and applying, to a part excluding the predetermined area part of the toner image, a second transfer bias whose transfer efficiency is at least smaller than the predetermined transfer efficiency of the first transfer bias.Type: ApplicationFiled: August 26, 2011Publication date: March 8, 2012Applicant: CANON KABUSHIKI KAISHAInventor: Keisuke Endoh