Patents by Inventor Hiroyuki Sakakibara
Hiroyuki Sakakibara 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: 8552342Abstract: To provide a heater that can reduce fixing failure in a paper passing area while suppressing a temperature rise in a sheet non-passing area, and a fixing apparatus including the heater. Resistors are connected in parallel between two conductive patterns that are provided on a heater substrate along the longitudinal direction of the substrate, and resistors are arranged so that the shortest current path of each of the resistors can overlap the shortest current path of an adjacent resistor in the longitudinal direction of the substrate.Type: GrantFiled: September 7, 2010Date of Patent: October 8, 2013Assignee: Canon Kabushiki KaishaInventor: Hiroyuki Sakakibara
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Patent number: 8508184Abstract: A coil unit performs at least one of transmission and reception of electric power using electromagnetic resonance between the coil unit and a primary resonance coil disposed to face the coil unit. The coil unit includes a secondary resonance coil that includes a plurality of coils, and that electromagnetically resonates with the primary resonance coil. A first coil among the plurality of coils is disposed in a manner such that a magnetic field generated by the first coil has a phase opposite to a phase of a magnetic field generated by at least one coil other than the first coil among the plurality of coils, with respect to a plane that faces the primary resonance coil.Type: GrantFiled: April 21, 2011Date of Patent: August 13, 2013Assignees: Toyota Jidosha Kabushiki Kaisha, Nippon Soken, Inc.Inventors: Hiroyuki Sakakibara, Shinji Ichikawa
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Publication number: 20130094339Abstract: Provided is an objective lens including a diffraction portion provided on a laser beam incident plane or output plane. The diffraction portion includes first second, and third diffraction regions, wherein first laser beams corresponding to a first optical disc having a first transmissive layer are condensed on a data recording portion of the first optical disc, second laser beams corresponding to a second optical disc having a second transmissive layer thicker than the first transmissive layer are condensed on a data recording portion of the second optical disc, and third laser beams corresponding to a third optical disc having a third transmissive layer thicker than the second transmissive layer are condensed on a data recording portion of the third optical disc. An evaluation parameter calculated on the basis of an in-plane efficiency distribution function has a value corresponding to a symbol error rate that is less than a predetermined value.Type: ApplicationFiled: August 31, 2012Publication date: April 18, 2013Applicant: Sony CorporationInventors: Motoo Aiba, Hiroyuki Sakakibara, Taiji Minakawa, Fumihiko Hanzawa, Masashi Abe, Jun Adachi, Katsutoshi Sato
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Patent number: 8401450Abstract: A pressing member for creating a nip in which the pressing member contacts a heating member and a recording material is heated while being nip-conveyed, includes an elastic layer and a high thermal conductive elastic layer, which is provided on the elastic layer and has a thermal conductivity which is higher than that of the elastic layer. In the high thermal conductive elastic layer, carbon fibers and carbon nanofibers are dispersed in a heat-resistant elastic material.Type: GrantFiled: October 14, 2010Date of Patent: March 19, 2013Assignee: Canon Kabushiki KaishaInventors: Yuko Sekihara, Norio Hashimoto, Hiroaki Sakai, Hiroyuki Sakakibara, Kazuo Kishino, Masaaki Takahashi, Katsuhisa Matsunaka
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Publication number: 20130063983Abstract: In an electrical power converter, an input circuit performs switching for converting a supply voltage of a power source to alternating-polarity voltage pulses which are applied to the primary winding of a transformer. Each voltage pulse is controlled (e.g., pulse width or amplitude is adjusted) based on a detected value of current flow in the primary winding, where the value has been detected an even-numbered plurality of voltage pulses previously. Any DC component of current flow in the primary winding, caused by manufacturing deviations between switching elements in the input circuit, can thereby be suppressed, and DC flux bias in the transformer thereby suppressed.Type: ApplicationFiled: September 6, 2012Publication date: March 14, 2013Applicant: DENSO CORPORATIONInventors: Takashi SUMI, Hiroyuki SAKAKIBARA, Yuji HAYASHI
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Publication number: 20130038281Abstract: A coil unit performs at least one of transmission and reception of electric power using electromagnetic resonance between the coil unit and a primary resonance coil disposed to face the coil unit. The coil unit includes a secondary resonance coil that includes a plurality of coils, and that electromagnetically resonates with the primary resonance coil. A first coil among the plurality of coils is disposed in a manner such that a magnetic field generated by the first coil has a phase opposite to a phase of a magnetic field generated by at least one coil other than the first coil among the plurality of coils, with respect to a plane that faces the primary resonance coil.Type: ApplicationFiled: April 21, 2011Publication date: February 14, 2013Applicants: NIPPON SOKEN, INC., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Sakakibara, Shinji Ichikawa
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Patent number: 8369763Abstract: A pressure roller forms a nip for contacting a heating member to pinch and convey a heat recording material. The roller includes a core metal and an elastic layer containing filler. The elastic layer containing the filler includes thermal conductive filler with a length of not less than 0.05 mm and not more than 1 mm with a thermal conductivity ?f in the longitudinal direction in a range of ?f?500 W/(m·k), being dispersed in not less than 5 vol % and not more than 40 vol %. The elastic layer containing the filler has a thermal conductivity ?y in the longitudinal direction perpendicular to a recording material conveyance direction, of ?y?2.5 W/(m·k) and an ASKER-C hardness of the filler is not more than 60 degrees. A solid rubber elastic layer with a thermal conductivity ? in a thickness direction of not less than 0.16 W/(m·k) and not more than 0.40 W/(m·k) is included.Type: GrantFiled: June 8, 2012Date of Patent: February 5, 2013Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Sakakibara, Norio Hashimoto, Hiroaki Sakai, Atsushi Iwasaki, Yuko Sekihara, Kazuo Kishino, Masaaki Takahashi, Katsuhisa Matsunaka
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Publication number: 20130009650Abstract: A voltage detector for detecting a voltage generated in a second resonant coil that is disposed to face a first resonant coil and that performs at least one of electric power transmission and electric power reception to and from the first resonant coil in a contactless manner by means of electromagnetic resonance includes: a first high-impedance element having one end connected to one end of the second resonant coil; a second high-impedance element having one end connected to the other end of the second resonant coil; a low-impedance element connected between the other end of the first high-impedance element and the other end of the second high-impedance element and having an impedance smaller than each of those of the first and second high-impedance elements; and an output terminal for outputting a signal associated with a voltage applied across the low-impedance element.Type: ApplicationFiled: May 27, 2010Publication date: January 10, 2013Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NIPPON SOKEN, INC.Inventors: Hiroyuki Sakakibara, Shinji Ichikawa
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Publication number: 20120308280Abstract: An image heating apparatus includes: an endless belt; a heater, contacted to a surface of the endless belt, provided so that a longitudinal direction thereof is parallel to a generating line direction of the endless belt; and a pressing member for forming a nip together with the endless belt. The heater includes: an elongated substrate; a first heat generating line, provided on the substrate along a longitudinal direction of the substrate, including first heat generating resistors having a negative temperature coefficient of resistance and being electrically connected in series; and a second heat generating line, provided on the substrate along the longitudinal direction of the substrate, electrically connected to the first heat generating line in parallel. The second heat generating line includes a plurality of second heat generating resistors having the negative temperature coefficient of resistance and being electrically connected in series.Type: ApplicationFiled: May 31, 2012Publication date: December 6, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Takaaki Tsuruya, Hiroyuki Sakakibara
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Patent number: 8310108Abstract: Electric power supplying equipment and an electric power receiving device include a primary self resonant coil and a secondary self resonant coil, respectively, resonating through an electromagnetic field to allow the electric power supplying equipment to supply the electric power receiving device with electric power in a non-contact manner. A control device controls a high frequency electric power supply device to control supplying electric power from the primary self resonant coil to the secondary self resonant coil. The control device estimates a distance between the primary self resonant coil and the secondary self resonant coil from an S-parameter S11 varying with the distance between the primary self resonant coil and the secondary self resonant coil, and controls supplying electric power, based on that estimated distance.Type: GrantFiled: June 3, 2009Date of Patent: November 13, 2012Assignees: Nippon Soken, Inc., Toyota Jidosha Kabushiki KaishaInventors: Takumi Inoue, Hiroyuki Sakakibara, Shinji Ichikawa
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Publication number: 20120269560Abstract: A roller for a fixing device includes a foam layer; an elastic layer containing a thermo-conductive filler and provided outside of the foam layer; a middle layer provided between the foam layer and elastic layer; wherein a content of all filler in the middle layer is smaller than a content of all filler in the elastic layer.Type: ApplicationFiled: April 13, 2012Publication date: October 25, 2012Applicant: CANON KABUSHIKI KAISHAInventor: Hiroyuki Sakakibara
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Publication number: 20120257913Abstract: A pressure roller forms a nip for contacting a heating member to pinch and convey a heat recording material. The roller includes a core metal and an elastic layer containing filler. The elastic layer containing the filler includes thermal conductive filler with a length of not less than 0.05 mm and not more than 1 mm with a thermal conductivity ?f in the longitudinal direction in a range of ?f?500 W/(m·k), being dispersed in not less than 5 vol % and not more than 40 vol %. The elastic layer containing the filler has a thermal conductivity ?y in the longitudinal direction perpendicular to a recording material conveyance direction, of ?y?2.5 W/(m·k) and an ASKER-C hardness of the filler is not more than 60 degrees. A solid rubber elastic layer with a thermal conductivity ? in a thickness direction of not less than 0.16 W/(m·k) and not more than 0.40 W/(m·k) is included.Type: ApplicationFiled: June 8, 2012Publication date: October 11, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Hiroyuki Sakakibara, Norio Hashimoto, Hiroaki Sakai, Atsushi Iwasaki, Yuko Sekihara, Kazuo Kishino, Masaaki Takahashi, Katsuhisa Matsunaka
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Publication number: 20120195658Abstract: A pressure roller for use in a fixing device includes a core metal, an elastic layer, a releasing layer, and an adhesive layer configured to cause the elastic layer and the releasing layer to adhere to each other, wherein the adhesive layer contains monomer electrolyte.Type: ApplicationFiled: January 26, 2012Publication date: August 2, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Hiroyuki Sakakibara, Yusaku Iwasawa, Hirohiko Aiba
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Publication number: 20120195654Abstract: A fixing rotating member configured to, together with a pressure member, pinch and transport a recording material carrying an image includes a base material and a releasing layer, wherein the releasing layer is made of at least one fluorine resin selected from among tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, ethylene-tetrafluoroethylene copolymer, and tetrafluoroethylene-hexafluoropropylene copolymer, the fluorine resin containing at least one type of polymer selected from among polyvinylidene fluoride, polyacrylonitrile, and polymethyl methacrylate, and monomer electrolyte.Type: ApplicationFiled: January 24, 2012Publication date: August 2, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Hiroyuki Sakakibara, Noriaki Sato, Shuji Saito
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Publication number: 20120195657Abstract: A pressure roller for use in a fixing device includes a core metal, an elastic layer, and a releasing layer. The releasing layer is made of at least one fluorine resin selected from among tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, ethylene-tetrafluoroethylene copolymer, and tetrafluoroethylene-hexafluoropropylene copolymer. The fluorine resin contains at least one polymer selected from among polyvinylidene fluoride, polyacrylonitrile, and polymethyl methacrylate, and monomer electrolyte.Type: ApplicationFiled: January 24, 2012Publication date: August 2, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Hiroyuki Sakakibara, Noriaki Sato, Shuji Saito, Hirohiko Aiba, Kouichi Uchida
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Patent number: 8224223Abstract: A pressure roller forms a nip for contacting a heating member to pinch and convey a heat recording material. The roller includes a core metal and an elastic layer containing filler. The elastic layer containing the filler includes thermal conductive filler with a length of not less than 0.05 mm and not more than 1 mm with a thermal conductivity ?f in the longitudinal direction in a range of ?f?500 W/(m·k), being dispersed in not less than 5 vol % and not more than 40 vol %. The elastic layer containing the filler has a thermal conductivity ?y in the longitudinal direction perpendicular to a recording material conveyance direction, of ?y?2.5 W/(m·k) and an ASKER-C hardness of the filler is not more than 60 degrees. A solid rubber elastic layer with a thermal conductivity ? in a thickness direction of not less than 0.16 W/(m·k) and not more than 0.40 W/(m·k) is included.Type: GrantFiled: June 7, 2011Date of Patent: July 17, 2012Assignee: Canon Kabushiki KaishaInventors: Hiroyuki Sakakibara, Norio Hashimoto, Hiroaki Sakai, Atsushi Iwasaki, Yuko Sekihara, Kazuo Kishino, Masaaki Takahashi, Katsuhisa Matsunaka
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Publication number: 20120121285Abstract: An image forming apparatus includes an image forming unit, a fixing unit, and a power control unit. The image forming unit forms an unfixed image on a recording material. The fixing unit includes an endless belt, a heater held in contact with the endless belt, a pressurization roller to form a fixing nip portion for pinching and conveying the recording material together with the heater via the endless belt, and a pressure changing mechanism to effect switching between a pressurization state and a pressure release state. The power control unit controls power to the heater. In response to transitioning from the pressure release state to the pressurization state, the power control unit starts power to the heater during a transition period before the pressurization state is attained and controls power to the heater such that a heater temperature does not exceed a predetermined upper limit temperature during the transition period.Type: ApplicationFiled: November 4, 2011Publication date: May 17, 2012Applicant: CANON KABUSHIKI KAISHAInventors: Yuko Sekihara, Hiroaki Sakai, Hiroyuki Sakakibara
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Publication number: 20120098348Abstract: Electric power supplying equipment and an electric power receiving device include a primary self resonant coil and a secondary self resonant coil, respectively, resonating through an electromagnetic field to allow the electric power supplying equipment to supply the electric power receiving device with electric power in a non-contact manner. A control device controls a high frequency electric power supply device to control supplying electric power from the primary self resonant coil to the secondary self resonant coil. The control device estimates a distance between the primary self resonant coil and the secondary self resonant coil from an S-parameter S11 varying with the distance between the primary self resonant coil and the secondary self resonant coil, and controls supplying electric power, based on that estimated distance.Type: ApplicationFiled: June 3, 2009Publication date: April 26, 2012Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NIPPON SOKEN, INC.Inventors: Takumi Inoue, Hiroyuki Sakakibara, Shinji Ichikawa
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Patent number: 8125876Abstract: Provided is an objective lens for which expressions 0.83<(pM/pL)<1.17 and 0.83<(pM/pT)<1.17 or expressions 0.80<(pM/pL)<1.20 and 0.86<(pM/pT)<1.14 are satisfied, where pL is the ratio of fifth-order spherical aberration to third-order spherical aberration, the spherical aberrations being caused by a difference in the thickness of a cover layer of an optical recording medium, pT is the ratio of fifth-order spherical aberration to third-order spherical aberration, the spherical aberrations being caused by a change in the temperature of an environment of the objective lens, and pM is the ratio of fifth-order spherical aberration to third-order spherical aberration, the spherical aberrations being caused by a change in incident magnification.Type: GrantFiled: October 26, 2009Date of Patent: February 28, 2012Assignee: Sony CorporationInventors: Motoo Aiba, Kiyoshi Toyota, Hiroyuki Sakakibara, Toyokazu Takahashi, Kouhei Anju, Kenichi Ogawa
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Publication number: 20120032521Abstract: Electric power feeding equipment and an electric power receiving device include a primary self resonant coil and a secondary self resonant coil coil, respectively, resonating through an electromagnetic field to allow the electric power feeding equipment to feed the electric power receiving device with electric power in a non-contact manner. A control device sets a frequency range for a spread spectrum, as based on an S-parameter S21 of a circuit constituted of the primary coil and primary self resonant coil of the electric power feeding equipment and the secondary self resonant coil and secondary coil of the electric power receiving device, and controls a high frequency electric power supply device to supply the electric power receiving device with high frequency electric power having the set frequency range.Type: ApplicationFiled: April 17, 2009Publication date: February 9, 2012Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NIPPON SOKEN, INC.Inventors: Takumi Inoue, Hiroyuki Sakakibara, Shinji Ichikawa