Patents by Inventor Hiroaki Umemoto

Hiroaki Umemoto 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: 20200357436
    Abstract: A magnetic recording medium includes a substrate, an underlayer formed on the substrate, and a magnetic layer formed on the underlayer. The magnetic layer includes an alloy having a L10 structure. The underlayer includes a first underlayer and a second underlayer. The first underlayer includes Mo and Ru, the content of Ru in the first underlayer is in a range of 5 atom % to 30 atom %, and the second underlayer includes a material having a body-centered cubic (BCC) structure. The second underlayer is formed between the first underlayer and the substrate.
    Type: Application
    Filed: April 30, 2020
    Publication date: November 12, 2020
    Inventors: Chen XU, Lei ZHANG, Takayuki FUKUSHIMA, Hisato SHIBATA, Takehiro YAMAGUCHI, Kazuya NIWA, Tomoo SHIGE, Hiroaki NEMOTO, Yuji UMEMOTO, Hiroshi KOYANAGI
  • Publication number: 20200327905
    Abstract: A magnetic recording medium includes a substrate, an underlayer, and a magnetic layer that are arranged in this order. The magnetic layer has a granular structure including magnetic grains having a L10 crystal structure, and grain boundary parts having a volume fraction in a range of 25 volume % to 50 volume %. The magnetic grains have a c-axis orientation with respect to the substrate. The grain boundary parts include a material having a lattice constant in a range of 0.30 nm to 0.36 nm, or in a range of 0.60 nm to 0.72 nm.
    Type: Application
    Filed: March 31, 2020
    Publication date: October 15, 2020
    Inventors: Takayuki FUKUSHIMA, Chen XU, Lei ZHANG, Hisato SHIBATA, Takehiro YAMAGUCHI, Kazuya NIWA, Tomoo SHIGE, Hiroaki NEMOTO, Yuji UMEMOTO, Hiroshi KOYANAGI
  • Publication number: 20200269564
    Abstract: An inkjet image forming apparatus, includes: a transfer part that transfers ink ejected from an inkjet head and carried on an intermediate transfer body to a recording medium; and a hardware processor that: detects a transfer rate when the ink is transferred by the transfer part; and controls a control parameter that influences how the ink spreads when being transferred to the recording medium, according to the transfer rate detected by the hardware processor.
    Type: Application
    Filed: February 24, 2020
    Publication date: August 27, 2020
    Inventors: Hiroaki UMEMOTO, Yukimasa Azuma
  • Patent number: 10738453
    Abstract: According to an aspect of the present invention, a toilet device includes: a washing unit washing a surface of a bowl in a toilet bowl; a water supplying unit supplying washing water to the washing unit; a silicic acid polymerization inhibiting unit adding inhibitor for silicic acid polymerization to the washing water left on the surface of the bowl after the washing of the bowl, the inhibitor inhibiting polymerization of silicic acid component in the washing water left on the surface of the bowl; and a control portion executing a control starting an operation of the silicic acid polymerization inhibiting unit before the surface of the bowl is evaporated.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: August 11, 2020
    Assignee: TOTO LTD.
    Inventors: Shinichi Yagi, Tomoyasu Ichiki, Hiroaki Amemori, Ayumu Umemoto, Yo Morotomi, Masahiro Yamamoto, Satoru Matsumoto
  • Patent number: 10689743
    Abstract: A piston ring is provided with a thermal spray coating that contains tungsten carbide and chrome carbide as a hard phase, and contains nickel as a metallic binder phase, and is characterized in that the thermal spray coating is formed by the spraying of a thermal spray powder that has been produced by means of a granulation sintering method, and that contains hard particles in which the mean particle diameter of the tungsten carbide has been adjusted by means of a BET method to fall within a range of not less than 0.15 ?m and not more than 0.45 ?m.
    Type: Grant
    Filed: June 10, 2016
    Date of Patent: June 23, 2020
    Assignees: IHI CORPORATION, IHI POWER SYSTEMS CO., LTD.
    Inventors: Yoshiyuki Saito, Takeshi Yamada, Yoshiyuki Umemoto, Nobuaki Kato, Hiroaki Mizuno
  • Patent number: 10591848
    Abstract: A magnet roller includes a magnet portion for generating magnetic force such that a plurality of peaks are formed in a magnetic force distribution. The magnet portion includes a plurality of magnetic poles. A cross section of the magnet portion includes a portion in which a distance from an axial center of the magnet portion to an outer edge of the magnet portion continuously changes in the circumferential direction. The magnetic force on a surface of a developing sleeve at a position corresponding to each of the plurality of magnetic poles is determined by (i) a distance from each of the plurality of magnetic poles to the developing sleeve in a radial direction of the developing sleeve and (ii) a magnitude of magnetic force in each of the plurality of magnetic poles. The distances from the plurality of magnetic poles to the developing sleeve in the radial direction are different.
    Type: Grant
    Filed: November 7, 2018
    Date of Patent: March 17, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Toshiaki Shima, Shinya Tokutake, Hidetoshi Noguchi, Hiroaki Umemoto
  • Patent number: 10559547
    Abstract: A semiconductor chip includes a semiconductor substrate having a main surface, first and second electrodes, a first insulating layer, and first and second bumps. The first and second electrodes are formed above the main surface of the semiconductor substrate. The first insulating layer is formed above a first portion of the first electrode. The first bump is formed above a second portion of the first electrode and above the first insulating layer and is electrically connected to the first electrode. The second bump is formed above the second electrode. The area of the second bump is larger than that of the first bump in a plan view of the main surface of the semiconductor substrate. The first insulating layer adjusts the distance from the main surface of the semiconductor substrate to the top surface of the first bump in a direction normal to the main surface.
    Type: Grant
    Filed: June 12, 2018
    Date of Patent: February 11, 2020
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Masahiro Shibata, Daisuke Tokuda, Atsushi Kurokawa, Hiroaki Tokuya, Yasunari Umemoto
  • Publication number: 20190333887
    Abstract: A semiconductor device that includes a bipolar transistor, wherein a third opening, through which a pillar bump and a second wiring line, which is electrically connected to an emitter layer, contact each other, is shifted in a longitudinal direction of the emitter layer away from a position at which the third opening would be directly above the emitter layer. The third opening is arranged, with respect to the emitter layer, such that an end portion of the emitter layer in the longitudinal direction of the emitter layer and the edge of the opening of the third opening are substantially aligned with each other.
    Type: Application
    Filed: July 8, 2019
    Publication date: October 31, 2019
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Yasunari UMEMOTO, Daisuke TOKUDA, Tsunekazu SAIMEI, Hiroaki TOKUYA
  • Patent number: 10388623
    Abstract: A semiconductor device that includes a bipolar transistor, wherein a third opening, through which a pillar bump and a second wiring line, which is electrically connected to an emitter layer, contact each other, is shifted in a longitudinal direction of the emitter layer away from a position at which the third opening would be directly above the emitter layer. The third opening is arranged, with respect to the emitter layer, such that an end portion of the emitter layer in the longitudinal direction of the emitter layer and the edge of the opening of the third opening are substantially aligned with each other.
    Type: Grant
    Filed: April 16, 2018
    Date of Patent: August 20, 2019
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Yasunari Umemoto, Daisuke Tokuda, Tsunekazu Saimei, Hiroaki Tokuya
  • Publication number: 20190187589
    Abstract: A magnet roller includes a magnet portion for generating magnetic force such that a plurality of peaks are formed in a magnetic force distribution. The magnet portion includes a plurality of magnetic poles. A cross section of the magnet portion includes a portion in which a distance from an axial center of the magnet portion to an outer edge of the magnet portion continuously changes in the circumferential direction. The magnetic force on a surface of a developing sleeve at a position corresponding to each of the plurality of magnetic poles is determined by (i) a distance from each of the plurality of magnetic poles to the developing sleeve in a radial direction of the developing sleeve and (ii) a magnitude of magnetic force in each of the plurality of magnetic poles. The distances from the plurality of magnetic poles to the developing sleeve in the radial direction are different.
    Type: Application
    Filed: November 7, 2018
    Publication date: June 20, 2019
    Inventors: Toshiaki SHIMA, Shinya TOKUTAKE, Hidetoshi NOGUCHI, Hiroaki UMEMOTO
  • Patent number: 10234812
    Abstract: A transport member, that transports a developer by rotating in a rotation direction that is predetermined around a rotation axis, includes: a shaft part including the rotation axis; and a blade part spirally provided on an outer peripheral surface of the shaft part, wherein the blade part includes a transport surface that is a surface facing a downstream side in a transport direction of the developer along the rotation axis, and a non-transport surface that is a surface other than the transport surface, and the transport member further includes a fin protruding from the non-transport surface of the blade part, the fin being provided with an interval from the outer peripheral surface of the shaft part.
    Type: Grant
    Filed: October 11, 2017
    Date of Patent: March 19, 2019
    Assignee: Konica Minolta, Inc.
    Inventors: Toshiaki Shima, Yohei Ito, Kazuyoshi Ota, Hiroaki Umemoto
  • Patent number: 10209646
    Abstract: An image forming apparatus includes: an image carrier that rotates while carrying a toner image; an image former that forms the toner image; a transfer roller that transfers the toner image to a recording medium; and a bias voltage applier that applies a voltage to the transfer roller, wherein the image former forms transfer images and forms a patch image with toner between a first transfer image and a second transfer image, and the bias voltage applier applies a first voltage having a polarity opposite to a charge polarity of the toner to the transfer roller, applies a second voltage having the polarity opposite to the charge polarity of the toner and larger than the first voltage to the transfer roller, and applies a third voltage having the polarity opposite to the charge polarity of the toner and smaller than the second voltage to the transfer roller.
    Type: Grant
    Filed: July 11, 2018
    Date of Patent: February 19, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kazuyoshi Ota, Hiroaki Umemoto, Futoshi Okazaki, Hidetoshi Noguchi, Masanori Kawada
  • Publication number: 20190049879
    Abstract: An image forming apparatus includes: an image carrier that rotates while carrying a toner image; an image former that forms the toner image; a transfer roller that transfers the toner image to a recording medium; and a bias voltage applier that applies a voltage to the transfer roller, wherein the image former forms transfer images and forms a patch image with toner between a first transfer image and a second transfer image, and the bias voltage applier applies a first voltage having a polarity opposite to a charge polarity of the toner to the transfer roller, applies a second voltage having the polarity opposite to the charge polarity of the toner and larger than the first voltage to the transfer roller, and applies a third voltage having the polarity opposite to the charge polarity of the toner and smaller than the second voltage to the transfer roller.
    Type: Application
    Filed: July 11, 2018
    Publication date: February 14, 2019
    Applicant: KONICA MINOLTA, INC.
    Inventors: Kazuyoshi OTA, Hiroaki UMEMOTO, Futoshi OKAZAKI, Hidetoshi NOGUCHI, Masanori KAWADA
  • Patent number: 10185270
    Abstract: An image forming apparatus includes an image former which forms an image on an image carrying member with toner stored in a storage, a toner supplier which supplies toner to the storage by driving a conveyance member, a density measurer which causes the image former to form an image having a predetermined density at a predetermined timing and measures density of the formed image, a corrector which corrects a driving amount of the conveyance member based on the density measured by the density measurer, and a changer which changes a timing when the density measurer measures the density in response to an event that a predetermined condition is satisfied.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: January 22, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Masanori Kawada, Hiroaki Umemoto, Yohei Ito, Toshiaki Shima, Kazuyoshi Ota, Shinya Tokutake, Hidetoshi Noguchi, Shinichi Yoshimoto, Futoshi Okazaki
  • Patent number: 9989882
    Abstract: A development device includes: a developer carrier including a magnet roller and a sleeve around the magnet roller; and a restriction member provided opposed to the sleeve surface. When a region on the surface opposed to the restriction member is defined as a first region and regions adjacent to the first region are defined as second and third regions, a magnetic flux density is largest in the second region. When a position where the density is largest in the second region is defined as a reference position, a position where the density is a predetermined value in the second region is defined as a downstream position, and a position where the density is the predetermined value in the third region is defined as an upstream position, the width between the reference position and the upstream position is longer than the width between the reference position and the downstream position.
    Type: Grant
    Filed: February 8, 2017
    Date of Patent: June 5, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Toshiaki Shima, Masanori Kawada, Yohei Ito, Shinya Tokutake, Hiroaki Umemoto
  • Publication number: 20180120752
    Abstract: A transport member, that transports a developer by rotating in a rotation direction that is predetermined around a rotation axis, includes: a shaft part including the rotation axis; and a blade part spirally provided on an outer peripheral surface of the shaft part, wherein the blade part includes a transport surface that is a surface facing a downstream side in a transport direction of the developer along the rotation axis, and a non-transport surface that is a surface other than the transport surface, and the transport member further includes a fin protruding from the non-transport surface of the blade part, the fin being provided with an interval from the outer peripheral surface of the shaft part.
    Type: Application
    Filed: October 11, 2017
    Publication date: May 3, 2018
    Applicant: KONICA MINOLTA, INC
    Inventors: Toshiaki SHIMA, Yohei ITO, Kazuyoshi OTA, Hiroaki UMEMOTO
  • Publication number: 20180088508
    Abstract: An image forming apparatus includes an image former which forms an image on an image carrying member with toner stored in a storage, a toner supplier which supplies toner to the storage by driving a conveyance member, a density measurer which causes the image former to form an image having a predetermined density at a predetermined timing and measures density of the formed image, a corrector which corrects a driving amount of the conveyance member based on the density measured by the density measurer, and a changer which changes a timing when the density measurer measures the density in response to an event that a predetermined condition is satisfied.
    Type: Application
    Filed: September 14, 2017
    Publication date: March 29, 2018
    Applicant: KONICA MINOLTA, INC.
    Inventors: Masanori KAWADA, Hiroaki UMEMOTO, Yohei ITO, Toshiaki SHIMA, Kazuyoshi OTA, Shinya TOKUTAKE, Hidetoshi NOGUCHI, Shinichi YOSHIMOTO, Futoshi OKAZAKI
  • Patent number: 9798289
    Abstract: An image forming apparatus has a function to clean exhaust air from inside and to discharge cleaned air. The image forming apparatus has an exhaust air duct configured to guide internal air to outside, and a cleaning filter configured to clean air passing through the exhaust air duct. A cubic measure of an airflow path in the exhaust air duct during normal operation has a first value, and the cubic measure of the airflow path in the exhaust air duct during operation causing a large amount of harmful matters to be contained in the exhaust air from inside has a second value greater than the first value.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: October 24, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hiroaki Umemoto, Shigeru Tashiro, Masayuki Satou, Masahiro Yamaguchi, Shoichi Yoshikawa
  • Patent number: 9771228
    Abstract: A sheet feeding device has a mounting portion allowing a stack of sheets to be mounted in a top-bottom direction, a suction/transportation portion provided above the mounting portion for attracting a first sheet positioned on top of the stack, and a blowing portion for blowing air to a foremost edge of the first sheet in a transportation direction while the first sheet is being attracted by the suction/transportation portion, thereby separating the first sheet from a second sheet next to the first sheet. After the first sheet is separated from the second sheet, the suction/transportation portion transports the first sheet in the transportation direction. The suction/transportation portion sets a suction force applied to the foremost edge of the first sheet smaller when the blowing portion blows air to the first sheet than when the suction/transportation portion transports the first sheet.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: September 26, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hiroshi Mizuno, Atsuhiko Shimoyama, Noboru Oomoto, Hiroaki Umemoto, Ryo Oshima
  • Publication number: 20170235248
    Abstract: A development device includes: a developer carrier including a magnet roller and a sleeve around the magnet roller; and a restriction member provided opposed to the sleeve surface. When a region on the surface opposed to the restriction member is defined as a first region and regions adjacent to the first region are defined as second and third regions, a magnetic flux density is largest in the second region. When a position where the density is largest in the second region is defined as a reference position, a position where the density is a predetermined value in the second region is defined as a downstream position, and a position where the density is the predetermined value in the third region is defined as an upstream position, the width between the reference position and the upstream position is longer than the width between the reference position and the downstream position.
    Type: Application
    Filed: February 8, 2017
    Publication date: August 17, 2017
    Applicant: KONICA MINOLTA, INC.
    Inventors: Toshiaki SHIMA, Masanori KAWADA, Yohei ITO, Shinya TOKUTAKE, Hiroaki UMEMOTO