Patents by Inventor Tatsuya KOHNO
Tatsuya KOHNO 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: 11960221Abstract: An image forming apparatus includes an image forming portion, a belt, a plurality of stretching rollers including an inner roller and an upstream roller, an outer member, an urging member, a first position changing mechanism, a storing portion, a controller, and an operating portion. The controller controls the first position changing mechanism on the basis of a kind of a recording material on which an image is formed, first set information stored in the storing portion, and first input information for changing setting of a position of the urging member inputted to the controller through the operating portion.Type: GrantFiled: October 6, 2022Date of Patent: April 16, 2024Assignee: Canon Kabushiki KaishaInventors: Ryosuke Tsuruga, Yutaka Kakehi, Tatsuya Kohno, Manato Kobayashi
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Patent number: 11815836Abstract: An image forming apparatus includes an image bearing member, an image forming portion, transfer member, a power source, a current detecting portion, an acquiring portion, and a controller capable of executing an operation in an adjustment mode. In the operation in the adjustment mode, the controller selects test toner images for setting a transfer voltage for a second side of a recording material, on the basis of information on densities of the test toner images acquired by the acquiring portion, and then adjusts the transfer voltage for the second side of the recording material on the basis of a current detected by the current detecting portion when the selected test toner images are transferred onto the recording material.Type: GrantFiled: March 22, 2022Date of Patent: November 14, 2023Assignee: Canon Kabushiki KaishaInventors: Yusuke Minato, Takenori Sueoka, Tatsuya Kohno
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Publication number: 20230305428Abstract: An image forming apparatus includes an image bearing member and a developer bearing member. A first period is from when rotational drive of the developer bearing member is started until increased to a speed at which the image forming apparatus performs image forming. A first absolute value of a difference between a developer bearing member surface potential Vdc and an image bearing member surface potential Vd, as determined when the image bearing member is facing the developer bearing member, is obtained during the first period. The value |Vdc?Vd| obtained during the first period is smaller than the value |Vdc?Vd| obtained after the first period. During the first period, the image bearing member surface potential Vd at the facing position is a first potential and, after the first period, the image bearing member surface potential Vd at the facing position becomes a second potential different from the first potential.Type: ApplicationFiled: March 13, 2023Publication date: September 28, 2023Inventors: TATSUYA KOHNO, TAKAHITO FUSE, ATSUSHI MATSUMOTO, HIROAKI ISHIDA
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Publication number: 20230107683Abstract: An image forming apparatus includes an image forming portion, a belt, a plurality of stretching rollers including an inner roller and an upstream roller, an outer member, an urging member, a first position changing mechanism, a storing portion, a controller, and an operating portion. The controller controls the first position changing mechanism on the basis of a kind of a recording material on which an image is formed, first set information stored in the storing portion, and first input information for changing setting of a position of the urging member inputted to the controller through the operating portion.Type: ApplicationFiled: October 6, 2022Publication date: April 6, 2023Inventors: Ryosuke Tsuruga, Yutaka Kakehi, Tatsuya Kohno, Manato Kobayashi
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Patent number: 11500309Abstract: An image forming apparatus includes an image forming portion, a belt, a plurality of stretching rollers including an inner roller and an upstream roller, an outer member, an urging member, a first position changing mechanism, a storing portion, a controller, and an operating portion. The controller controls the first position changing mechanism on the basis of a kind of a recording material on which an image is formed, first set information stored in the storing portion, and first input information for changing setting of a position of the urging member inputted to the controller through the operating portion.Type: GrantFiled: June 15, 2021Date of Patent: November 15, 2022Assignee: Canon Kabushiki KaishaInventors: Ryosuke Tsuruga, Yutaka Kakehi, Tatsuya Kohno, Manato Kobayashi
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Publication number: 20220317608Abstract: An image forming apparatus includes an image bearing member, an image forming portion, transfer member, a power source, a current detecting portion, an acquiring portion, and a controller capable of executing an operation in an adjustment mode. In the operation in the adjustment mode, the controller selects test toner images for setting a transfer voltage for a second side of a recording material, on the basis of information on densities of the test toner images acquired by the acquiring portion, and then adjusts the transfer voltage for the second side of the recording material on the basis of a current detected by the current detecting portion when the selected test toner images are transferred onto the recording material.Type: ApplicationFiled: March 22, 2022Publication date: October 6, 2022Inventors: Yusuke Minato, Takenori Sueoka, Tatsuya Kohno
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Patent number: 11347165Abstract: An image forming apparatus includes an image forming portion, a belt, an inner roller, an outer member, an inner roller position changing mechanism, an acquiring portion, and a controller. In a case that information acquired by the acquiring portion shows that first and second recording materials are coated paper, the controller controls a position changing mechanism so that a position of the inner roller when a toner image is transferred onto the second recording material is changed to a second position. In a case that the information acquired by the acquiring portion shows that the first and second recording materials are plain paper, the controller controls the position changing mechanism so that the position of the inner roller when the toner image is transferred onto the second recording material is maintained at a first position.Type: GrantFiled: June 17, 2021Date of Patent: May 31, 2022Assignee: Canon Kabushiki KaishaInventors: Yutaka Kakehi, Ryosuke Tsuruga, Tatsuya Kohno, Manato Kobayashi
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Publication number: 20210397113Abstract: An image forming apparatus includes an image forming portion, a belt, an inner roller, an outer member, an inner roller position changing mechanism, an acquiring portion, and a controller. In a case that second information acquired by the acquiring portion shows that first and second recording materials are coated paper, the controller controls a position changing mechanism so that a position of the inner roller when a toner image is transferred onto the second recording material is changed to a second position. In a case that the second information acquired by the acquiring portion shows that the first and second recording materials are plain paper, the controller controls the position changing mechanism so that the position of the inner roller when the toner image is transferred onto the second recording material is maintained at a first position.Type: ApplicationFiled: June 17, 2021Publication date: December 23, 2021Inventors: Yutaka Kakehi, Ryosuke Tsuruga, Tatsuya Kohno, Manato Kobayashi
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Publication number: 20210397112Abstract: An image forming apparatus includes an image forming portion, a belt, a plurality of stretching rollers including an inner roller and an upstream roller, an outer member, an urging member, a first position changing mechanism, a storing portion, a controller, and an operating portion. The controller controls the first position changing mechanism on the basis of a kind of a recording material on which an image is formed, first set information stored in the storing portion, and first input information for changing setting of a position of the urging member inputted to the controller through the operating portion.Type: ApplicationFiled: June 15, 2021Publication date: December 23, 2021Inventors: Ryosuke Tsuruga, Yutaka Kakehi, Tatsuya Kohno, Manato Kobayashi
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Patent number: 11137709Abstract: An image forming apparatus includes an image bearing member, a transfer member, a voltage source, a current detecting portion, and a controller. In a case that the predetermined voltage is changed in a first job on the basis of the detection result of the current detecting portion during passing of the recording material through the transfer portion, in a second job subsequent to the first job, when a first recording material of the second job passes through the transfer portion, the controller changes a voltage applied to the transfer member on the basis of the predetermined voltage changed in the first job.Type: GrantFiled: June 26, 2020Date of Patent: October 5, 2021Assignee: Canon Kabushiki KaishaInventors: Tatsuya Kohno, Takenori Sueoka, Yusuke Minato, Mitsuru Yamatani
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Patent number: 11029626Abstract: 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: GrantFiled: May 14, 2019Date of Patent: June 8, 2021Assignee: Canon Kabushiki KaishaInventors: Yuusuke Torimaru, Dai Kanai, Shozo Aiba, Tatsuya Kohno
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Publication number: 20200409299Abstract: An image forming apparatus includes an image bearing member, a transfer member, a voltage source, a current detecting portion, and a controller. In a case that the predetermined voltage is changed in a first job on the basis of the detection result of the current detecting portion during passing of the recording material through the transfer portion, in a second job subsequent to the first job, when a first recording material of the second job passes through the transfer portion, the controller changes a voltage applied to the transfer member on the basis of the predetermined voltage changed in the first job.Type: ApplicationFiled: June 26, 2020Publication date: December 31, 2020Inventors: Tatsuya Kohno, Takenori Sueoka, Yusuke Minato, Mitsuru Yamatani
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Patent number: 10551762Abstract: An image forming apparatus includes an endless belt, an inner roller, an upstream roller, a pressing member, and a guiding member. In a cross-section perpendicular to a rotational axis of the inner roller, a downstream free end of the guiding member is disposed downstream of a pressing portion normal line Lc with respect to a feeding direction of the sheet, where L is a reference line which is a common tangent of the inner roller and the upstream roller in a contact portion relative to the belt, Ld is a pressing portion tangent line, parallel with the reference line, of the belt in a region where the pressing member contacts the belt, and Lc is the pressing portion normal line passing through a contact point between the belt and the pressing portion tangent line Ld and perpendicular to the reference line L.Type: GrantFiled: October 31, 2018Date of Patent: February 4, 2020Assignee: Canon Kabushiki KaishaInventor: Tatsuya Kohno
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Publication number: 20190354044Abstract: 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: ApplicationFiled: May 14, 2019Publication date: November 21, 2019Inventors: Yuusuke Torimaru, Dai Kanai, Shozo Aiba, Tatsuya Kohno
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Publication number: 20190129323Abstract: An image forming apparatus includes an endless belt, an inner roller, an upstream roller and a pressing member, and a guiding member. In a cross-section perpendicular to a rotational axis of the inner roller, a downstream free end of the guiding member is disposed downstream of a pressing portion normal line Lc with respect to the feeding direction of the sheet, where L is a reference line which is a common tangent of the inner roller and the upstream roller in a contact portion relative to the belt, Ld is a pressing portion tangent line, parallel with the reference line, of the belt in a region where the pressing member contacts the belt, and Lc is the pressing portion normal line passing through a contact point between the belt and the pressing portion tangent line Ld and perpendicular to the reference line L.Type: ApplicationFiled: October 31, 2018Publication date: May 2, 2019Inventor: Tatsuya Kohno
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Publication number: 20170266722Abstract: A method for manufacturing a light alloy wheel that includes a substantially annular rim part and a disc part that is joined to one edge of the rim part on an inner side and is to be attached to an axle. The method includes a molten metal pouring step for pouring a light alloy molten metal from a sprue opened into a mold cavity formed into a shape of the rim part, and a forced cooling step for, after the molten metal pouring step, forcibly cooling the light alloy molten metal poured into the mold cavity formed into the shape of the rim part such that one predetermined cooling unit of a plurality of cooling units provided along an entire circumference on an outer side or an inner side of the mold cavity formed into the shape of the rim part is first operated and an other cooling unit thereof is then operated.Type: ApplicationFiled: September 14, 2015Publication date: September 21, 2017Applicant: Hitachi Metals, Ltd.Inventors: Takeshi HARIMOTO, Tatsuya KOHNO, Shigekazu YAMADA