Patents by Inventor Takenori Sueoka
Takenori Sueoka 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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Publication number: 20230367249Abstract: An image forming apparatus includes an image bearing member, an image forming portion, a transfer member, a power source, an acquiring portion, and a controller capable of executing an operation in an adjustment mode. A plurality of test toner images transferred onto a recording material in the occurrence in the adjusting mode include a first test toner image transferred under application of a first test voltage and a second test toner image transferred under application of a second test voltage different from the first test voltage. In the operation in the adjustment mode, the controller adjusts the transfer voltage set for transfer on the basis of first information on variation in image density acquired in different regions of the first test toner image and second information on variation in image density acquired in different regions of the second test toner image.Type: ApplicationFiled: July 27, 2023Publication date: November 16, 2023Inventors: Yusuke Minato, Takenori Sueoka
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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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Patent number: 11754957Abstract: An image forming apparatus includes an image bearing member, an image forming portion, a transfer member, a power source, an acquiring portion, and a controller capable of executing an operation in an adjustment mode. A plurality of test toner images transferred onto a recording material in the occurrence in the adjusting mode include a first test toner image transferred under application of a first test voltage and a second test toner image transferred under application of a second test voltage different from the first test voltage. In the operation in the adjustment mode, the controller adjusts the transfer voltage set for transfer on the basis of first information on variation in image density acquired in different regions of the first test toner image and second information on variation in image density acquired in different regions of the second test toner image.Type: GrantFiled: March 4, 2022Date of Patent: September 12, 2023Assignee: Canon Kabushiki KaishaInventors: Yusuke Minato, Takenori Sueoka
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Publication number: 20230244161Abstract: An image forming apparatus includes an image bearing member, a transfer device, a voltage applying portion, a fixing device, and a controller. During execution of an operation in an output mode, the controller is capable of selectively executing: an operation in which test images formed on a first side of a first recording material are fixed and then the first recording material is outputted without forming the test images on a second side of the first recording material and then in which a second recording material is passed through the fixing device without forming the test images on a first side of the second recording material and then the test images are transferred onto a second side of the second recording material.Type: ApplicationFiled: January 27, 2023Publication date: August 3, 2023Inventor: Takenori Sueoka
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Publication number: 20220317610Abstract: An image forming apparatus includes an image bearing member, an image forming portion, a transfer member, a power source, an acquiring portion, and a controller capable of executing an operation in an adjustment mode. A plurality of test toner images transferred onto a recording material in the occurrence in the adjusting mode include a first test toner image transferred under application of a first test voltage and a second test toner image transferred under application of a second test voltage different from the first test voltage. In the operation in the adjustment mode, the controller adjusts the transfer voltage set for transfer on the basis of first information on variation in image density acquired in different regions of the first test toner image and second information on variation in image density acquired in different regions of the second test toner image.Type: ApplicationFiled: March 4, 2022Publication date: October 6, 2022Inventors: Yusuke Minato, Takenori Sueoka
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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: 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: 11126115Abstract: An image forming apparatus includes an image bearing member, a transfer member, a voltage source, a sensor configured to detect a current value or a voltage value, an image detecting portion, and a controller capable of executing an operation in a mode for setting a transfer voltage to be applied to the transfer member, on the basis of a result of detection of a test chart formed on a test recording material. The controller sets the transfer voltage on the basis of a first detection result acquired by the sensor under application of a voltage to the transfer member when the recording material is absent in the transfer portion and a second detection result acquired by the sensor under application of the test voltages to the transfer member when the test recording material is present in said transfer portion during the operation in the mode.Type: GrantFiled: February 24, 2020Date of Patent: September 21, 2021Assignee: CANON KABUSHIKI KAISHAInventor: Takenori Sueoka
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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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Publication number: 20200285176Abstract: An image forming apparatus includes an image bearing member, a transfer member, a voltage source, a sensor configured to detect a current value or a voltage value, an image detecting portion, and a controller capable of executing an operation in a mode for setting a transfer voltage to be applied to the transfer member, on the basis of a result of detection of a test chart formed on a test recording material. The controller sets the transfer voltage on the basis of a first detection result acquired by the sensor under application of a voltage to the transfer member when the recording material is absent in the transfer portion and a second detection result acquired by the sensor under application of the test voltages to the transfer member when the test recording material is present in said transfer portion during the operation in the mode.Type: ApplicationFiled: February 24, 2020Publication date: September 10, 2020Inventor: Takenori Sueoka
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Patent number: 9250546Abstract: A member for electrophotography having a multilayer structure or a single-layer structure, including an outermost layer which satisfies the following A, B and C: A: the outermost layer has perfluoropolyether and a binder resin, and in the outermost layer, the ratio of the number of fluorine atoms to the number of carbon atoms is 0.10 or more and 0.40 or less; B: in a 19F-NMR spectrum of the outermost layer, the relaxation time T2 of a peak derived from CF2 moieties of perfluoropolyether is 13 milliseconds or more at 22° C.; and C: the total sum of the contents of CF3 moieties, CF2 moieties, and CF moieties in the binder resin is 5% by mass or less.Type: GrantFiled: June 24, 2014Date of Patent: February 2, 2016Assignee: Canon Kabushiki KaishaInventors: Naoto Kameyama, Kenji Onuma, Rieko Sakamoto, Yasushi Shimizu, Koichi Sato, Kimihiro Yoshimura, Akira Watanabe, Maho Tanaka, Shigeki Takishita, Hiroshi Tominaga, Keiji Karube, Takenori Sueoka
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Patent number: 9014602Abstract: An image forming apparatus includes an image bearing member which bears a toner image, an intermediate transfer member which bears the toner image transferred from the image bearing member, an endless recording material-conveying member which conveys a recording material, and a transfer portion which transfers the toner image to the recording material conveyed from the intermediate transfer member by the recording material-conveying member, wherein a perimeter of the intermediate transfer member is set to substantially an integral multiple of a perimeter of the recording material-conveying member.Type: GrantFiled: October 21, 2010Date of Patent: April 21, 2015Assignee: Canon Kabushiki KaishaInventor: Takenori Sueoka
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Publication number: 20140377695Abstract: A member for electrophotography having a multilayer structure or a single-layer structure, including an outermost layer which satisfies the following A, B and C: A: the outermost layer has perfluoropolyether and a binder resin, and in the outermost layer, the ratio of the number of fluorine atoms to the number of carbon atoms is 0.10 or more and 0.40 or less; B: in a 19F-NMR spectrum of the outermost layer, the relaxation time T2 of a peak derived from CF2 moieties of perfluoropolyether is 13 milliseconds or more at 22° C.; and C: the total sum of the contents of CF3 moieties, CF2 moieties, and CF moieties in the binder resin is 5% by mass or less.Type: ApplicationFiled: June 24, 2014Publication date: December 25, 2014Inventors: Naoto Kameyama, Kenji Onuma, Rieko Sakamoto, Yasushi Shimizu, Koichi Sato, Kimihiro Yoshimura, Akira Watanabe, Maho Tanaka, Shigeki Takishita, Hiroshi Tominaga, Keiji Karube, Takenori Sueoka
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Patent number: 8326175Abstract: An image forming apparatus, including: a rotatable image bearing member; a developer carrying member configured to carry a developer to form a developer image on the image bearing member; a cleaning blade configured to remove the developer remaining on the image bearing member; a conveying unit configured to convey the developer removed by the cleaning blade, toward a developer recovering portion; and a cleaning auxiliary portion configured to move the developer accumulated on the cleaning blade toward the conveying unit, the cleaning auxiliary portion having a length that is smaller, in a rotation axial direction of the image bearing member, than a developer width of the developer carried by the developer carrying member.Type: GrantFiled: October 12, 2010Date of Patent: December 4, 2012Assignee: Canon Kabushiki KaishaInventor: Takenori Sueoka
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Patent number: 8265499Abstract: Constant current control is performed with a target current It in each delivery interval between recording materials to sample a control voltage V1 applied to a secondary transfer roller. A transition to the constant current control with the target current It is made after a recording material divided voltage according to a kind of the recording material is applied to the constant voltage V1 at a head of the recording material. A voltage in which 0.9 is multiplied by addition of the sampled control voltage V1 and the recording material divided voltage Vp according to the kind of the recording material is set to a lower limit value Vlimit to perform the constant current control, and the constant voltage Vlimit is applied to the secondary transfer roller when a control voltage is lower than the lower limit value Vlimit in a calculation stage.Type: GrantFiled: February 12, 2010Date of Patent: September 11, 2012Assignee: Canon Kabushiki KaishaInventor: Takenori Sueoka
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Publication number: 20110097104Abstract: An image forming apparatus, including: a rotatable image bearing member; a developer carrying member configured to carry a developer to form a developer image on the image bearing member; a cleaning blade configured to remove the developer remaining on the image bearing member; a conveying unit configured to convey the developer removed by the cleaning blade, toward a developer recovering portion; and a cleaning auxiliary portion configured to move the developer accumulated on the cleaning blade toward the conveying unit, the cleaning auxiliary portion having a length that is smaller, in a rotation axial direction of the image bearing member, than a developer width of the developer carried by the developer carrying member.Type: ApplicationFiled: October 12, 2010Publication date: April 28, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Takenori Sueoka
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Publication number: 20110097096Abstract: An image forming apparatus includes an image bearing member which bears a toner image, an intermediate transfer member which bears the toner image transferred from the image bearing member, an endless recording material-conveying member which conveys a recording material, and a transfer portion which transfers the toner image to the recording material conveyed from the intermediate transfer member by the recording material-conveying member, wherein a perimeter of the intermediate transfer member is set to substantially an integral multiple of a perimeter of the recording material-conveying member.Type: ApplicationFiled: October 21, 2010Publication date: April 28, 2011Applicant: CANON KABUSHIKI KAISHAInventor: Takenori Sueoka
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Publication number: 20100209128Abstract: Constant current control is performed with a target current It in each delivery interval between recording materials to sample a control voltage V1 applied to a secondary transfer roller. A transition to the constant current control with the target current It is made after a recording material divided voltage according to a kind of the recording material is applied to the constant voltage V1 at a head of the recording material. A voltage in which 0.9 is multiplied by addition of the sampled control voltage V1 and the recording material divided voltage Vp according to the kind of the recording material is set to a lower limit value Vlimit to perform the constant current control, and the constant voltage Vlimit is applied to the secondary transfer roller when a control voltage is lower than the lower limit value Vlimit in a calculation stage.Type: ApplicationFiled: February 12, 2010Publication date: August 19, 2010Applicant: CANON KABUSHIKI KAISHAInventor: Takenori Sueoka