Patents by Inventor Taku Kimura
Taku Kimura 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: 20170374217Abstract: An image reading apparatus includes: a movable body configured to illuminate a document with light; and an apparatus body configured to wirelessly transmit power to the movable body, wherein the movable body includes receiver coils, and a feed circuit in which the receiver coils uses receiving power to supply power to a load, the apparatus body includes transmitter coils placed along a track of the receiver coils, the transmitter coils and the receiver coils are placed such that power supply efficiency of any receiver coil with the transmitter coil placed along the track of the receiver coil fluctuates, and power supply efficiency related to one receiver coil increases at a position where power supply efficiency related to the other receiver coil drops, and the feed circuit supplies power sequentially using the receiving power of the receiver coil whose power supply efficiency is increased to highest among the receiver coils.Type: ApplicationFiled: June 14, 2017Publication date: December 28, 2017Applicant: KONICA MINOLTA, INC.Inventors: Takeshi ISHIDA, Tatsuya EGUCHI, Isao WATANABE, Hiroaki TAKATSU, Taku KIMURA, Atomu NAKASHIMA
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Publication number: 20170259447Abstract: A post-processing apparatus includes: a moving mechanism configured to move a punching apparatus in a width direction orthogonal to a transportation direction of a sheet; and a sensor configured to optically detect a mark formed on the sheet and indicating a position to be punched. The mark is configured such that an interval in the transportation direction between a plurality of feature portions extending in the width direction is configured to be changed depending on the width direction. The moving mechanism is configured to determine a position of the punching apparatus in the width direction based on a difference between respective timings of detection of the plurality of feature portions.Type: ApplicationFiled: March 10, 2017Publication date: September 14, 2017Applicant: Konica Minolta, Inc.Inventors: Hiroaki Takatsu, Tatsuya Eguchi, Takeshi Ishida, Isao Watanabe, Taku Kimura
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Publication number: 20170261892Abstract: A power supply control device including a chopper circuit generating a heater current for a halogen heater, a current feedback circuit generating a current feedback signal indicating a current amount based on an amount of the heater current, and a constant current circuit performing pulse-width modulation of the heater current amount according to a difference between a target heater current amount and the current amount indicated by the current feedback signal. The current feedback circuit switches between methods at least including a first method and a second method for generating the current feedback signal. The current feedback signal indicates a greater current amount with the first method than with the second method, and the current feedback circuit uses the first method during a period with a predetermined time length starting from when the halogen heater is turned on, and uses the second method after elapse of the period.Type: ApplicationFiled: February 23, 2017Publication date: September 14, 2017Applicant: KONICA MINOLTA, INC.Inventors: Mikiyuki AOKI, Seiichi KIRIKUBO, Taku KIMURA, Akinori KIMATA, Takeshi TAMADA
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Patent number: 9749489Abstract: A power control device receiving supply of power from a power source, the power control device including: a power accumulator accumulating a part of power from the power source; a first voltage converter receiving power from the power source and the power accumulator, performing voltage conversion to a first target voltage, and supplying power with the first target voltage to a first load; a second voltage converter receiving power from the first voltage converter, performing voltage conversion to a second target voltage, and supplying power with the second target voltage to a second load; a power source monitor monitoring power from the power source; and a power controller lowering the first target voltage to a level that the second voltage converter is capable of converting to the second target voltage when the power source monitor detects that the supply of power from the power source has stopped.Type: GrantFiled: April 22, 2016Date of Patent: August 29, 2017Assignee: KONICA MINOLTA, INC.Inventors: Junichi Masuda, Mikiyuki Aoki, Masahiro Nonoyama, Taku Kimura
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Publication number: 20170176904Abstract: An image forming apparatus includes a fixing unit that includes a roller and an electric heating wire heater, a current applying circuit that applies electrical current to the electric heater wire heater, a measuring unit electrically connected to the current applying circuit and that measures a value of electrical current that flows through the electric heating wire heater, and a controller that controls the electrical current that flows through the electric heating wire heater by controlling the current applying circuit based on the electrical current value measured by the measuring unit. The controller controls the electrical current to be less than or equal to an electrical current limit value. A magnitude of the electrical current limit value is linked to a magnitude of stable state electrical current.Type: ApplicationFiled: December 16, 2016Publication date: June 22, 2017Applicant: Konica Minolta, Inc.Inventors: Taku Kimura, Mikiyuki Aoki, Seiichi Kirikubo, Takeshi Tamada, Akinori Kimata
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Publication number: 20160337539Abstract: A power control device receiving supply of power from a power source, the power control device including: a power accumulator accumulating a part of power from the power source; a first voltage converter receiving power from the power source and the power accumulator, performing voltage conversion to a first target voltage, and supplying power with the first target voltage to a first load; a second voltage converter receiving power from the first voltage converter, performing voltage conversion to a second target voltage, and supplying power with the second target voltage to a second load; a power source monitor monitoring power from the power source; and a power controller lowering the first target voltage to a level that the second voltage converter is capable of converting to the second target voltage when the power source monitor detects that the supply of power from the power source has stopped.Type: ApplicationFiled: April 22, 2016Publication date: November 17, 2016Applicant: KONICA MINOLTA, INC.Inventors: Junichi MASUDA, Mikiyuki AOKI, Masahiro NONOYAMA, Taku KIMURA
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Patent number: 9335710Abstract: An electric power supply control device comprises a first converter, at least one second converter, and an electrical voltage control unit. The second converter can work in intermittent oscillation, and converts outputting electrical voltage from the first converter. The electrical voltage control unit controls the outputting electrical voltage of the first converter, so that the outputting electrical voltage is equal to or less than a minimum value of upper limits of operating electrical voltage of the second converter, and is more than or equal to a maximum value of lower limits of operating electrical voltage of the second converter, and at least one of the second converter performs low electric power behavior.Type: GrantFiled: September 15, 2015Date of Patent: May 10, 2016Assignee: KONICA MINOLTA, INC.Inventors: Mikiyuki Aoki, Taku Kimura, Yohei Yamada, Morio Kinoshita, Toru Kasamatsu, Kouei Cho
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Publication number: 20160085199Abstract: An electric power supply control device comprises a first converter, at least one second converter, and an electrical voltage control unit. The second converter can work in intermittent oscillation, and converts outputting electrical voltage from the first converter. The electrical voltage control unit controls the outputting electrical voltage of the first converter, so that the outputting electrical voltage is equal to or less than a minimum value of upper limits of operating electrical voltage of the second converter, and is more than or equal to a maximum value of lower limits of operating electrical voltage of the second converter, and at least one of the second converter performs low electric power behavior.Type: ApplicationFiled: September 15, 2015Publication date: March 24, 2016Applicant: KONICA MINOLTA, INC.Inventors: Mikiyuki AOKI, Taku KIMURA, Yohei YAMADA, Morio KINOSHITA, Toru KASAMATSU, Kouei CHO
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Publication number: 20150256079Abstract: An electric power supply control device comprises AC/DC converter, DC/DC converters, and an output electrical voltage monitor unit of the AC/DC converter. When output electrical voltage of the AC/DC converter increases to the first preset value P1, the AC/DC converter stops the convert. When the output electrical voltage decreases to the second preset value P2, the AC/DC converter restarts the convert. The first preset value P1 is equal to or less than the lowest value, out of the upper limit values in electrical voltage ranges in which the DC/DC converters CV1 and CV2 can work. The second preset value P2 is more than or equal to the highest value, out of the lower limit values in electrical voltage ranges in which the DC/DC converters CV1 and CV2 can work.Type: ApplicationFiled: March 10, 2015Publication date: September 10, 2015Applicant: Konica Minolta, Inc.Inventors: Taku KIMURA, Mikiyuki AOKI, Hideki NAKAMURA, Masahiro NONOYAMA, Junichi MASUDA, Yohei YAMADA
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Patent number: 8811847Abstract: An image forming apparatus that forms a color image by overlaying toner images formed on respective first, second, and third photoreceptors, comprising: first, second, and third voltage-applied members respectively facing the first, second, and third photoreceptors; a first AC power supply generating first AC voltage, and superimposing the first AC voltage on first DC voltage to generate first voltage for causing a first electric field between the first voltage-applied member and the first photoreceptor; a second AC power supply generating second AC voltage, and superimposing the second AC voltage on second DC voltage to generate second voltage for causing a second electric field between the second voltage-applied member and the second photoreceptor; and a composite circuit superimposing a composite of the first voltage and the second voltage on third DC voltage, to generate third voltage for causing a third electric field between the third voltage-applied member and the third photoreceptor.Type: GrantFiled: January 9, 2013Date of Patent: August 19, 2014Assignee: Konica Minolta Business Technologies, Inc.Inventors: Mikiyuki Aoki, Junichi Masuda, Taku Kimura, Takahiro Yokoya
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Patent number: 8718524Abstract: A fixation device including: a conveyance member configured to convey media; a heater configured to heat the conveyance member; a pressure member being in contact with the conveyance member; a first sandwiching member disposed facing the pressure member with the conveyance member between the first sandwiching member and the pressure member and being in contact with the conveyance member; and a second sandwiching member disposed facing the pressure member with the conveyance member between the second sandwiching member and the pressure member and being in contact with the conveyance member.Type: GrantFiled: April 20, 2011Date of Patent: May 6, 2014Assignee: Oki Data CorporationInventor: Taku Kimura
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Publication number: 20130235622Abstract: A power supply device comprises: a rectifier circuit converting AC input voltage to DC; a smoothing capacitor connected to an output terminal of the rectifier circuit; a switching element turning on and off output from the smoothing capacitor to provide to a load; a switching controller controlling the switching of the switching element; a first signal input part generating a first signal for stopping the switching and keeping it stopped and inputting the first signal to the switching controller via a particular terminal thereof, when a trouble occurs on the power supply device; a detector detecting that the AC input voltage is a predetermined value or less; and a second signal input part generating a second signal for stopping the switching and keeping it stopped and inputting the second signal to the switching controller via the particular terminal, when the AC input voltage is the predetermined value or less.Type: ApplicationFiled: March 1, 2013Publication date: September 12, 2013Applicant: Konica Minolta Business Technologies, Inc.Inventors: Junichi Masuda, Mikiyuki Aoki, Taku Kimura, Takahiro Yokoya
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Publication number: 20130183057Abstract: An image forming apparatus that forms a color image by overlaying toner images formed on respective first, second, and third photoreceptors, comprising: first, second, and third voltage-applied members respectively facing the first, second, and third photoreceptors; a first AC power supply generating first AC voltage, and superimposing the first AC voltage on first DC voltage to generate first voltage for causing a first electric field between the first voltage-applied member and the first photoreceptor; a second AC power supply generating second AC voltage, and superimposing the second AC voltage on second DC voltage to generate second voltage for causing a second electric field between the second voltage-applied member and the second photoreceptor; and a composite circuit superimposing a composite of the first voltage and the second voltage on third DC voltage, to generate third voltage for causing a third electric field between the third voltage-applied member and the third photoreceptor.Type: ApplicationFiled: January 9, 2013Publication date: July 18, 2013Inventors: Mikiyuki Aoki, Junichi Masuda, Taku Kimura, Takahiro Yokoya
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Patent number: 8417170Abstract: A fixing device includes a fixing belt in an endless shape for fixing developer to a printing medium; a supporting member for contacting with and supporting the fixing belt; a heating member for contacting with and heating the fixing belt supported with the supporting member; and a heat regulating member disposed between the supporting member and the heating member.Type: GrantFiled: November 17, 2010Date of Patent: April 9, 2013Assignee: Oki Data CorporationInventor: Taku Kimura
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Publication number: 20120250357Abstract: A power supplying device provides power to the body of an image forming apparatus and an optional device connected to the body of the same. The power supplying device comprises: a rectifier circuit which rectifies an alternating current inputted from an alternating-current source; a booster circuit which boosts and smooths the direct-current voltage caused by the rectifier circuit; a judgment portion which judges whether or not there is an optional device connected to the body of the image forming apparatus; an identification portion which identifies the type of the optional device connected thereto; and a controller which, if there is an optional device connected thereto according to the judgment portion, adjusts the boosted voltage obtained by the booster circuit to a higher value than that if there is no optional device connected thereto, which depends on the type of the optional device identified by the identification portion.Type: ApplicationFiled: March 29, 2012Publication date: October 4, 2012Applicant: Konica Minolta Business Technologies, Inc.Inventors: Takahiro YOKOYA, Mikiyuki Aoki, Junichi Masuda, Taku Kimura
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Publication number: 20120093548Abstract: A fixing device includes a fixing belt with an endless shape to be heated with a heating member; a pressing roller disposed outside the fixing belt; a fixing side roller disposed inside the fixing belt and pressed against the pressing roller with the fixing belt in between; and a nip forming member disposed inside the fixing belt and pressed against the pressing roller with the fixing belt in between. Further, the fixing side roller is arranged to form a strain portion having a strain amount in the pressing roller so that the strain amount is greater than a strain amount of a strain portion formed in the pressing roller with the nip forming member.Type: ApplicationFiled: September 21, 2011Publication date: April 19, 2012Inventor: Taku KIMURA
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Patent number: 8107868Abstract: An aspect of the invention provides a fixing device that comprises: an endless fixing belt; a first rotating body arranged at an inner side of the fixing belt; and a heater arranged to face an inner surface of the fixing belt and configured to heat the fixing belt and to suspend the fixing belt in a tensioned state together with the first rotating body, the heater comprising: a heat generating unit arranged at an end portion of the heater on a downstream side in a direction of travel of the fixing belt and configured to heat the fixing belt; and a support including metal and configured to support the heat generating unit.Type: GrantFiled: April 9, 2009Date of Patent: January 31, 2012Assignee: Oki Data CorporationInventor: Taku Kimura
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Publication number: 20110262193Abstract: A fixation device including: a conveyance member configured to convey media; a heater configured to heat the conveyance member; a pressure member being in contact with the conveyance member; a first sandwiching member disposed facing the pressure member with the conveyance member between the first sandwiching member and the pressure member and being in contact with the conveyance member; and a second sandwiching member disposed facing the pressure member with the conveyance member between the second sandwiching member and the pressure member and being in contact with the conveyance member.Type: ApplicationFiled: April 20, 2011Publication date: October 27, 2011Applicant: OKI DATA CORPORATIONInventor: TAKU KIMURA
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Patent number: 7970326Abstract: An image forming apparatus includes a determining unit, an image forming unit, a fixing member, a pressing member, a separating member and a release agent applying member. The determining unit determines whether to print a borderless image or not. The image forming unit forms a developer image on a recording medium in accordance with the printing data so that the developer image reaches the vicinity of a leading end of the recording medium. The fixing member fixes the developer image to the recording medium. The pressing member is pressed against the fixing member to form a nip portion therebetween. The separating member is disposed on a downstream side of the nip portion so that the separating member has no contact with the fixing member. The separating member separates the recording medium from the fixing member. The release agent applying member applies a release agent to the fixing member.Type: GrantFiled: August 24, 2006Date of Patent: June 28, 2011Assignee: Oki Data CorporationInventors: Katsuyuki Ito, Taku Kimura
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Publication number: 20110123238Abstract: A fixing device includes a fixing belt in an endless shape for fixing developer to a printing medium; a supporting member for contacting with and supporting the fixing belt; a heating member for contacting with and heating the fixing belt supported with the supporting member; and a heat regulating member disposed between the supporting member and the heating member.Type: ApplicationFiled: November 17, 2010Publication date: May 26, 2011Inventor: Taku KIMURA