Patents by Inventor Ryosuke Sakai
Ryosuke Sakai 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: 20180027669Abstract: To provide an art of making a position of an operation section adjustable. An operation unit including an operation section, a supporter that supports the operation unit, and an elastic member that is held between the operation unit and the supporter are included, and the operation unit is brought into pressure contact with the supporter by an elastic force of the elastic member, and thereby the operation unit is slidably assembled to the supporter.Type: ApplicationFiled: June 13, 2017Publication date: January 25, 2018Applicant: FUJITSU TEN LIMITEDInventors: Masatoshi SAITO, Shinya HACHIUE, Atsushi BABA, Ryosuke SAKAI, Nobuyuki UKAI
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Patent number: 9829853Abstract: An image forming apparatus, comprising: a body casing; a drum unit; a belt unit; and a waste toner storage unit, the drum unit comprising: a photosensitive drum; a cleaning unit; and a conveying unit configured to convey toner removed by the cleaning unit, the belt unit comprising: a belt and a unit electric contact, the conveying unit comprises: a conveying member to convey the toner removed by the cleaning unit in a moving direction of the drum unit; and a conveying tube having a discharging outlet configured to let toner carried by the conveying member be discharged to the waste toner storage unit, wherein the discharging outlet is disposed on a downstream side with respect to a body electric contact in a direction pointing from an inside position to an outside position of the drum unit in a state where the drum unit is disposed at the inside position.Type: GrantFiled: March 31, 2016Date of Patent: November 28, 2017Assignee: Brother Kogyo Kabushiki KaishaInventors: Junichi Hashimoto, Yoshiyuki Okazaki, Ryosuke Sakai, Takamasa Tsukada, Ryuya Yamazaki
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Publication number: 20170277119Abstract: An image forming apparatus has a main casing including an opening provided at an upper portion of the main casing, a process cartridge attachable to the main casing through the opening, and a top cover movable between an open position where the top cover opens the opening and a close position where the top cover closes the opening. The process cartridge includes a photosensitive drum and a memory provided with a first electrical contact. The top cover supports an LED head configured to emit light to expose the photosensitive drum, and a second electrical contact electrically connected to the first electrical contact in a state where the process cartridge is attached to the main casing and in a state where the top cover is positioned at the close position.Type: ApplicationFiled: March 23, 2017Publication date: September 28, 2017Inventors: Ryosuke Sakai, Junichi Yokoi
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Patent number: 9764919Abstract: An image forming apparatus includes a coating portion configured to perform a coating process that forms a coating film on a recording sheet with an image formed thereon, a main transport path configured to transport the recording sheet with the image formed thereon and to have a branching portion formed thereon, and a sub transport path configured to be once branched from the main transport path at the branching portion and to be returned to the main transport path again. The coating portion is disposed on the sub transport path.Type: GrantFiled: July 6, 2012Date of Patent: September 19, 2017Assignee: SHARP KABUSHIKI KAISHAInventors: Norio Tomita, Hiroshi Nakatani, Ryosuke Sakai, Takumi Mori, Kyosuke Taka, Kohichi Yamauchi
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Publication number: 20170214811Abstract: An image forming apparatus includes a lower casing, an upper casing, an arm, and a brake member. The lower casing includes a photosensitive body. The upper casing includes an exposure unit configured to expose the photosensitive body. The upper casing is configured to pivot on a predetermined axis relative to the lower casing between a closed position where the upper casing covers an upper portion of the lower casing and an open position where the upper casing exposes the upper portion of the lower casing. The slider is attached to the upper casing and is configured to slide in a sliding direction orthogonal to the predetermined axis. The arm includes a first end pivotably connected to the lower casing and a second end pivotably connected to the slider. The brake member is configured to control a speed of the slider when the slider slides in the sliding direction.Type: ApplicationFiled: January 18, 2017Publication date: July 27, 2017Inventors: Ryosuke Sakai, Takamasa Tsukada
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Patent number: 9529018Abstract: A current sensor includes: a magneto electric conversion element; and a magnetic field concentrating core applying a magnetic field caused by a measurement object current to the magneto electric conversion element. A planar shape of the magnetic field concentrating core perpendicular to a current flowing direction is a ring shape with a gap. The magneto electric conversion element is arranged in the gap. A part of a conductor for flowing the current is surrounded by the magnetic field concentrating core. The magnetic field concentrating core includes two first magnetic members and at least one second magnetic member, which are stacked alternately in the current flowing direction. Parts of the two first magnetic members adjacent to each other via the one second magnetic member are opposed to each other through a clearance or an insulator.Type: GrantFiled: December 25, 2012Date of Patent: December 27, 2016Assignees: DENSO CORPORATION, KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATIONInventors: Ryosuke Sakai, Norihiro Kurumado, Kousuke Nomura, Ichiro Sasada
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Publication number: 20160291535Abstract: An image forming apparatus, comprising: a body casing; a drum unit; a belt unit; and a waste toner storage unit, the drum unit comprising: a photosensitive drum; a cleaning unit; and a conveying unit configured to convey toner removed by the cleaning unit, the belt unit comprising: a belt and a unit electric contact, the conveying unit comprises: a conveying member to convey the toner removed by the cleaning unit in a moving direction of the drum unit; and a conveying tube having a discharging outlet configured to let toner carried by the conveying member be discharged to the waste toner storage unit, wherein the discharging outlet is disposed on a downstream side with respect to a body electric contact in a direction pointing from an inside position to an outside position of the drum unit in a state where the drum unit is disposed at the inside position.Type: ApplicationFiled: March 31, 2016Publication date: October 6, 2016Inventors: Junichi Hashimoto, Yoshiyuki Okazaki, Ryosuke Sakai, Takamasa Tsukada, Ryuya Yamazaki
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Publication number: 20160258985Abstract: A current detection system includes: first and second magnetic plates arranged in parallel with a predetermined distance; a bus bar for flowing current; and a magneto-electric conversion element converting a lateral direction component of a measurement object magnetic flux, generated by current flowing through the bus bar, to an electric signal. When an external magnetic flux in a lateral direction passes through an accommodation space between the first and second magnetic plates, a trajectory of the external magnetic flux is bent by the first and second magnetic plates, and the accommodation space is divided into a permeable space, through which the external magnetic flux passes, and a non-permeable space, through which the external magnetic flux does not pass. The bus bar is arranged in the accommodation space. The magneto-electric conversion element is arranged in the non-permeable space. The bus bar and the magneto-electric conversion element are lined in the height direction.Type: ApplicationFiled: January 22, 2015Publication date: September 8, 2016Inventors: Kousuke NOMURA, Ryosuke SAKAI, Masaki TAKASHIMA, Ichiro SASADA
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Patent number: 9417269Abstract: A current sensor for measuring a current flowing through a conductor includes a sensor substrate, a magnetoelectric converter formed on a surface of the sensor substrate and configured to output a signal changing with an applied magnetic field, and a magnetic shield that surrounds the sensor substrate and the conductor to magnetically shield the inside from the outside. The output signal of the magnetoelectric converter changes with a magnetic filed applied along the formation surface of the sensor substrate. The magnetic shield has at least one gap for reducing magnetic saturation in the magnetic shield. The gap and the sensor substrate are located at the same height in a z-direction orthogonal to the formation surface of the sensor substrate.Type: GrantFiled: June 26, 2012Date of Patent: August 16, 2016Assignee: DENSO CORPORATIONInventors: Ryosuke Sakai, Takamasa Kinpara, Norihiro Kurumado, Kousuke Nomura
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Patent number: 9363400Abstract: An image forming apparatus includes a registration roller configured to adjust a starting time point of conveying a paper sheet; a printing unit configured to form a color image or a monochrome image on a photosensitive drum, and transfer the image to the paper sheet at a downstream side with respect to the registration roller in a conveyance direction to print; a line sensor configured to detect a conveyance position at an upstream side with respect to the printing unit in the conveyance direction; and a control unit configured to obtain a displacement amount with respect to a preset reference position based on the conveyance position, correct an image formation position according to the displacement amount to correct a printing position on the paper sheet, and change a correction method for the printing position according to whether any of the color image and the monochrome image is formed.Type: GrantFiled: September 9, 2013Date of Patent: June 7, 2016Assignee: Sharp Kabushiki KaishaInventors: Hiroshi Nakatani, Norio Tomita, Ryosuke Sakai
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Patent number: 9238562Abstract: An image forming apparatus, including a main body with a first sheet outlet tray and an image forming unit, a feed path configured to guide a sheet from the image forming unit toward the first sheet outlet tray, is provided. The feed path includes a first exit path to guide a sheet toward the first sheet outlet tray and a first duplex path diverging from the feed path to guide a sheet to return to the image forming unit. The main body is attachable with a sheet-exit unit. The sheet-exit unit includes a second sheet outlet tray, a second exit path, and a second duplex path. The second exit path guides a sheet to the second sheet outlet tray. The second exit path is connected with the first exit path when the sheet-exit unit is attached to the main body.Type: GrantFiled: March 24, 2015Date of Patent: January 19, 2016Assignee: Brother Kogyo Kabushiki KaishaInventors: Tatsuaki Mori, Tomoya Yamamoto, Ryosuke Sakai, Atsushi Hayakawa, Takuya Yamaguchi
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Publication number: 20150274469Abstract: An image forming apparatus, including a main body with a first sheet outlet tray and an image forming unit, a feed path configured to guide a sheet from the image forming unit toward the first sheet outlet tray, is provided. The feed path includes a first exit path to guide a sheet toward the first sheet outlet tray and a first duplex path diverging from the feed path to guide a sheet to return to the image forming unit. The main body is attachable with a sheet-exit unit. The sheet-exit unit includes a second sheet outlet tray, a second exit path, and a second duplex path. The second exit path guides a sheet to the second sheet outlet tray. The second exit path is connected with the first exit path when the sheet-exit unit is attached to the main body.Type: ApplicationFiled: March 24, 2015Publication date: October 1, 2015Inventors: Tatsuaki MORI, Tomoya YAMAMOTO, Ryosuke SAKAI, Atsushi HAYAKAWA, Takuya YAMAGUCHI
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Publication number: 20150249764Abstract: An image forming apparatus includes a registration roller configured to adjust a starting time point of conveying a paper sheet; a printing unit configured to form a color image or a monochrome image on a photosensitive drum, and transfer the image to the paper sheet at a downstream side with respect to the registration roller in a conveyance direction to print; a line sensor configured to detect a conveyance position at an upstream side with respect to the printing unit in the conveyance direction; and a control unit configured to obtain a displacement amount with respect to a preset reference position based on the conveyance position, correct an image formation position according to the displacement amount to correct a printing position on the paper sheet, and change a correction method for the printing position according to whether any of the color image and the monochrome image is formed.Type: ApplicationFiled: September 9, 2013Publication date: September 3, 2015Inventors: Hiroshi Nakatani, Norio Tomita, Ryosuke Sakai
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Patent number: 9069318Abstract: An image forming apparatus includes an image forming portion that forms an image on a recording sheet, a transport path that transports the recording sheet with the image formed thereon by the image forming portion, a coating portion that performs a coating process that forms a coating film on the recording sheet that is being transported on the transport path, and a reading portion that reads a calibration chart on the recording sheet that is being transported on the transport path. The coating portion is disposed on the upstream side in a recording sheet transport direction of the reading portion on the transport path, a calibration process is performed for an image formed by the image forming portion, and the calibration chart is formed on the recording sheet by the image forming portion in order to perform the calibration process.Type: GrantFiled: July 11, 2012Date of Patent: June 30, 2015Assignee: SHARP KABUSHIKI KAISHAInventors: Norio Tomita, Hiroshi Nakatani, Ryosuke Sakai, Takumi Mori, Kyosuke Taka, Kohichi Yamauchi
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Publication number: 20140333293Abstract: A current sensor includes: a magneto electric conversion element; and a magnetic field concentrating core applying a magnetic field caused by a measurement object current to the magneto electric conversion element. A planar shape of the magnetic field concentrating core perpendicular to a current flowing direction is a ring shape with a gap. The magneto electric conversion element is arranged in the gap. A part of a conductor for flowing the current is surrounded by the magnetic field concentrating core. The magnetic field concentrating core includes two first magnetic members and at least one second magnetic member, which are stacked alternately in the current flowing direction. Parts of the two first magnetic members adjacent to each other via the one second magnetic member are opposed to each other through a clearance or an insulator.Type: ApplicationFiled: December 25, 2012Publication date: November 13, 2014Inventors: Ryosuke Sakai, Norihiro Kurumado, Kousuke Nomura, Ichiro Sasada
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Publication number: 20140111196Abstract: A current sensor for measuring a current flowing through a conductor includes a sensor substrate, a magnetoelectric converter formed on a surface of the sensor substrate and configured to output a signal changing with an applied magnetic field, and a magnetic shield that surrounds the sensor substrate and the conductor to magnetically shield the inside from the outside. The output signal of the magnetoelectric converter changes with a magnetic filed applied along the formation surface of the sensor substrate. The magnetic shield has at least one gap for reducing magnetic saturation in the magnetic shield. The gap and the sensor substrate are located at the same height in a z-direction orthogonal to the formation surface of the sensor substrate.Type: ApplicationFiled: June 26, 2012Publication date: April 24, 2014Applicant: DENSO CORPORATIONInventors: Ryosuke Sakai, Takamasa Kinpara, Norihiro Kurumado, Kousuke Nomura
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Patent number: 8703684Abstract: Provided is a water-based lubricant comprising a hyperbranch-type polyglycerol having an absolute molecular weight of from 5,000 to 500,000. The water-based lubricant has a small friction coefficient and is excellent in lubrication performance and defoamability, as compared with conventional water-based lubricants comprising an ethylene/propylene oxide copolymer, and is favorable, for example, for a water-based metal processing agent and a hydraulic pressure fluid.Type: GrantFiled: August 28, 2009Date of Patent: April 22, 2014Assignee: Idemitsu Kosan Co., Ltd.Inventors: Toyoji Kakuchi, Toshifumi Satoh, Ryosuke Sakai, Fumiaki Takagi, Masami Yamanaka
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Publication number: 20130052350Abstract: An image forming apparatus includes a coating portion configured to perform a coating process that forms a coating film on a recording sheet with an image formed thereon, a main transport path configured to transport the recording sheet with the image formed thereon and to have a branching portion formed thereon, and a sub transport path configured to be once branched from the main transport path at the branching portion and to be returned to the main transport path again. The coating portion is disposed on the sub transport path.Type: ApplicationFiled: July 6, 2012Publication date: February 28, 2013Inventors: Norio Tomita, Hiroshi Nakatani, Ryosuke Sakai, Takumi Mori, Kyosuke Taka, Kohichi Yamauchi
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Publication number: 20130051817Abstract: An image forming apparatus includes an image forming portion that forms an image on a recording sheet, a transport path that transports the recording sheet with the image formed thereon by the image forming portion, a coating portion that performs a coating process that forms a coating film on the recording sheet that is being transported on the transport path, and a reading portion that reads a calibration chart on the recording sheet that is being transported on the transport path. The coating portion is disposed on the upstream side in a recording sheet transport direction of the reading portion on the transport path, a calibration process is performed for an image formed by the image forming portion, and the calibration chart is formed on the recording sheet by the image forming portion in order to perform the calibration process.Type: ApplicationFiled: July 11, 2012Publication date: February 28, 2013Inventors: Norio TOMITA, Hiroshi NAKATANI, Ryosuke SAKAI, Takumi MORI, Kyosuke TAKA, Kohichi YAMAUCHI
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Publication number: 20120275802Abstract: The image forming apparatus includes: a paper feed unit; a print unit; a registration roller; a sheet leading end sensor provided downstream, in a transport direction of the recording paper, of the registration roller; a time measuring unit for measuring a time from a start point of transportation of the recording paper by the registration roller to a point of detection of the leading end of the recording paper by the sheet leading end sensor; a memory unit for storing a reference image forming time and a reference time; a print control unit; and an arithmetic unit for obtaining a difference between the reference time and the time detected by the time measuring unit. The print control unit adjusts the length of the image forming period in accordance with the adjusted image forming time determined based on the difference obtained by the arithmetic unit and the reference image forming time.Type: ApplicationFiled: April 25, 2012Publication date: November 1, 2012Inventors: Norio Tomita, Yasuaki Fukada, Hidetoshi Atsumi, Koji Wakamoto, Atsushi Ogo, Ryosuke Sakai