Patents by Inventor Hiroaki Takatsu

Hiroaki Takatsu 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: 20210058529
    Abstract: An image forming apparatus, includes: a media sensor that detects a sheet type; a fixer that fixes the image on a sheet; a storage that stores a fixing temperature for each sheet type; and a hardware processor that controls power supplied to the fixer by pulse-width modulation (PWM) control and controls a temperature of the fixer to the fixing temperature corresponding to the sheet type detected by the media sensor.
    Type: Application
    Filed: August 20, 2020
    Publication date: February 25, 2021
    Inventors: Takahiro TSUJIMOTO, Takeshi TAMADA, Tianhua XU, Hiroaki TAKATSU, Katsuyuki IKUTA, Akihiro HAYASHI
  • Publication number: 20200120217
    Abstract: An image processing apparatus includes a member controller that controls a drive prevented member that is prevented in advance from being driven in a standalone mode while an image processing operation is not being carried out, and a plurality of other normal members that are not the drive prevented member, and a hardware processor, wherein the hardware processor allows at least one of the plurality of normal members to be driven after an integrated signal indicating abnormality in at least one of the plurality of normal members is detected, and determines an abnormal member having abnormality from among the plurality of normal members based on presence or absence of the integrated signal with at least one of the plurality of normal members being driven.
    Type: Application
    Filed: October 8, 2019
    Publication date: April 16, 2020
    Inventors: Tianhua XU, Hiroaki TAKATSU, Takeshi TAMADA, Takahiro TSUJIMOTO, Katsuyuki IKUTA
  • Patent number: 10520867
    Abstract: An image forming apparatus includes a heater, a first heater drive circuit which rectifies AC power from an AC power supply and subjects a current to be conducted to the heater to PWM control, and a second heater drive circuit which allows conduction from the AC power to the heater. The image forming apparatus further includes a switching circuit which sets a drive circuit which is to drive the heater to any one of the first heater drive circuit and the second heater drive circuit and a control unit which controls switching between the drive circuits by the switching circuit.
    Type: Grant
    Filed: August 27, 2018
    Date of Patent: December 31, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Takeshi Tamada, Hiroaki Takatsu, Takahiro Tsujimoto, Tianhua Xu
  • Publication number: 20190171149
    Abstract: A recording material discriminating apparatus includes: a hardware processor that: detects a physical property of a recording material in different ways; and when transmittance of the recording material is within a first range, discriminates a type of the recording material by using a detection result from the hardware processor, and when the transmittance of the recording material is within a second range different from the first range, discriminates the type of the recording material by using a detection result from the hardware processor.
    Type: Application
    Filed: November 6, 2018
    Publication date: June 6, 2019
    Applicant: KONICA MINOLTA, INC.
    Inventors: Takahiro Tsujimoto, Takeshi Tamada, Hiroaki Takatsu, Tianhua Xu
  • Publication number: 20190079435
    Abstract: An image forming apparatus includes a heater, a first heater drive circuit which rectifies AC power from an AC power supply and subjects a current to be conducted to the heater to PWM control, and a second heater drive circuit which allows conduction from the AC power to the heater. The image forming apparatus further includes a switching circuit which sets a drive circuit which is to drive the heater to any one of the first heater drive circuit and the second heater drive circuit and a control unit which controls switching between the drive circuits by the switching circuit.
    Type: Application
    Filed: August 27, 2018
    Publication date: March 14, 2019
    Applicant: KONICA MINOLTA, INC.
    Inventors: Takeshi Tamada, Hiroaki Takatsu, Takahiro Tsujimoto, Tianhua Xu
  • Patent number: 10112314
    Abstract: 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: Grant
    Filed: March 10, 2017
    Date of Patent: October 30, 2018
    Assignee: Konica Minolta, Inc.
    Inventors: Hiroaki Takatsu, Tatsuya Eguchi, Takeshi Ishida, Isao Watanabe, Taku Kimura
  • Patent number: 10027835
    Abstract: 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: Grant
    Filed: June 14, 2017
    Date of Patent: July 17, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Takeshi Ishida, Tatsuya Eguchi, Isao Watanabe, Hiroaki Takatsu, Taku Kimura, Atomu Nakashima
  • Patent number: 10003714
    Abstract: An image forming apparatus includes an acquiring unit configured to acquire atmosphere pressure in the installation place of the image forming apparatus, photoconductors, light sources configured to radiate laser light, and a polygon mirror configured to be rotatable. The polygon mirror exposes the photoconductors by reflecting the laser light toward the photoconductors while rotating. The image forming apparatus further includes a control device configured to control rotation of the polygon mirror. The control device outputs an enable signal for allowing the image forming apparatus to perform printing, if rotation of the polygon mirror is stabilized after start of the rotation, and advances the timing of outputting the enable signal as the atmosphere pressure increases.
    Type: Grant
    Filed: August 29, 2017
    Date of Patent: June 19, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Tatsuya Eguchi, Isao Watanabe, Takeshi Ishida, Hiroaki Takatsu, Taku Kimura, Atomu Nakashima
  • Publication number: 20180059571
    Abstract: An image forming apparatus includes an acquiring unit configured to acquire atmosphere pressure in the installation place of the image forming apparatus, photoconductors, light sources configured to radiate laser light, and a polygon mirror configured to be rotatable. The polygon mirror exposes the photoconductors by reflecting the laser light toward the photoconductors while rotating. The image forming apparatus further includes a control device configured to control rotation of the polygon mirror. The control device outputs an enable signal for allowing the image forming apparatus to perform printing, if rotation of the polygon mirror is stabilized after start of the rotation, and advances the timing of outputting the enable signal as the atmosphere pressure increases.
    Type: Application
    Filed: August 29, 2017
    Publication date: March 1, 2018
    Applicant: KONICA MINOLTA, INC.
    Inventors: Tatsuya EGUCHI, Isao WATANABE, Takeshi ISHIDA, Hiroaki TAKATSU, Taku KIMURA, Atomu NAKASHIMA
  • Publication number: 20170374217
    Abstract: 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: Application
    Filed: June 14, 2017
    Publication date: December 28, 2017
    Applicant: KONICA MINOLTA, INC.
    Inventors: Takeshi ISHIDA, Tatsuya EGUCHI, Isao WATANABE, Hiroaki TAKATSU, Taku KIMURA, Atomu NAKASHIMA
  • Publication number: 20170259447
    Abstract: 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: Application
    Filed: March 10, 2017
    Publication date: September 14, 2017
    Applicant: Konica Minolta, Inc.
    Inventors: Hiroaki Takatsu, Tatsuya Eguchi, Takeshi Ishida, Isao Watanabe, Taku Kimura
  • Patent number: 9709944
    Abstract: A sheet post-processing device for post-processing of a recording sheet ejected from an image forming device in an ejection direction, the sheet post-processing device including: a first tray on which the recording sheet is placed after ejection; a push-out member that pushes out, in a push-out direction different from the ejection direction, the recording sheet placed on the first tray; and a guide member adjacent to an ejection direction downstream end of the first tray, the guide member supporting a portion of the recording sheet that protrudes from the first tray in the ejection direction. The guide member includes a resistive force reduction unit that reduces a resistive force that occurs due to contact between the guide member and the recording sheet, the resistive force hindering the pushing out of the recording sheet when the push-out member pushes out the recording sheet.
    Type: Grant
    Filed: September 1, 2015
    Date of Patent: July 18, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hiroaki Takatsu, Naoya Nakayama, Tatsuya Eguchi
  • Publication number: 20160062297
    Abstract: A sheet post-processing device for post-processing of a recording sheet ejected from an image forming device in an ejection direction, the sheet post-processing device including: a first tray on which the recording sheet is placed after ejection; a push-out member that pushes out, in a push-out direction different from the ejection direction, the recording sheet placed on the first tray; and a guide member adjacent to an ejection direction downstream end of the first tray, the guide member supporting a portion of the recording sheet that protrudes from the first tray in the ejection direction. The guide member includes a resistive force reduction unit that reduces a resistive force that occurs due to contact between the guide member and the recording sheet, the resistive force hindering the pushing out of the recording sheet when the push-out member pushes out the recording sheet.
    Type: Application
    Filed: September 1, 2015
    Publication date: March 3, 2016
    Inventors: Hiroaki TAKATSU, Naoya NAKAYAMA, Tatsuya EGUCHI
  • Patent number: 8777830
    Abstract: In a paper folding device, a first driving unit for forming a first folding line on the paper moves a first folding plate member to the paper fed to a first feeding position until load on the first folding plate member reaches a prescribed value or higher. A time period from the start of driving of the first folding unit by the first driving unit to the start of driving of a second folding unit by a second driving unit is determined based on characteristic of paper.
    Type: Grant
    Filed: June 10, 2011
    Date of Patent: July 15, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Teruhiko Toyoizumi, Takashi Watanabe, Hiroaki Takatsu, Hitoshi Asano, Takafumi Tanaka
  • Patent number: 8620205
    Abstract: An image formation apparatus is connectable to a post processing apparatus for performing a post process to a sheet. The image formation apparatus includes: a power source for outputting a voltage to a first load and a second load, the first load being provided in the image formation apparatus and being involved in image formation, the second load being provided in the post processing apparatus and being involved in the post process; a power source controller for increasing the output voltage of the power source during an operation of the second load; and a load controller for controlling an operation of the first load such that an output of the first load falls within a predetermined range during the operation of the second load.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: December 31, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Natsuyo Higashi, Satoru Sasaki, Yoshiki Katayama, Hiroaki Takatsu, Hirotada Seki
  • Patent number: 8606123
    Abstract: When a unit containing a fuse is mounted, in response to detection of a potential indicating that the fuse has not been blown by a detection circuit, a current for blowing the fuse is supplied from a blowing circuit to the mounted unit containing the fuse, and operation of the blowing circuit is checked based on potentials detected by the detection circuit before current supply and after current supply, respectively. When a unit containing a non-blown component instead of a fuse is mounted, a current is supplied from the blowing circuit to the mounted unit containing the non-blown component, and operation of the blowing circuit is checked based on potentials detected by the detection circuit before current supply and during current supply, respectively, or potentials detected by the detection circuit before current supply and after current supply, respectively.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: December 10, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Junichi Arai, Hiroaki Takatsu
  • Publication number: 20130095991
    Abstract: A sheet folder includes a blade for bending a sheet, a pair of folding rollers for sandwiching the sheet bent by the blade, a heating unit for heating a folded part of the sheet sandwiched between the pair of folding rollers by the blade, a temperature detection unit for detecting a temperature of the folded part, and a control unit for keeping a state in which the sheet is sandwiched between the pair of folding rollers until at least one of a temperature change and a temperature of the folded part that are detected by the temperature detection unit satisfies a prescribed condition after the blade allows the sheet to be sandwiched between the pair of folding rollers.
    Type: Application
    Filed: October 16, 2012
    Publication date: April 18, 2013
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC
    Inventors: Takeshi ISHIDA, Kiyohito TSUJIHARA, Takatoshi HAMADA, Hiroaki TAKATSU, Yohei YAMADA, Akimasa ISHIKAWA
  • Patent number: 8380092
    Abstract: In this toner concentration sensor, as the magnetic permeability of a two-component developer 3 containing toner and carrier in a two-component developing unit 1 has changed with changing TC ratio of the two-component developer, the oscillation frequency of a first oscillation circuit 20 having a detection coil 5 changes, on the other hand the oscillation frequency of a second oscillation circuit 30 having a reference coil 6 does not change. While, changes in temperature conditions cause the oscillation frequency of the second oscillation circuit to change in the same way as the oscillation frequency of the first oscillation circuit. Therefore, utilizing a difference between the oscillation frequencies of the first and second oscillation circuits makes it possible to cancel out changes in the temperature conditions so that a value corresponding to only the magnetic permeability of the two-component developer can be obtained.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: February 19, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hirotada Seki, Akinori Kimata, Satoru Sasaki, Natsuyo Higashi, Hiroaki Takatsu
  • Patent number: 8320789
    Abstract: In an image formation state, to cool a recording sheet on a route from a fixer to a paper ejection roller, a blast fan assumes a first position restrained by a first fixture. Also, in another state, to cool a recording sheet on the catch tray, the blast fan assumes a second position restrained by a second fixture. To transition from the image formation state to another state, the blast fan sends a strong blast in a reverse direction from the normal blast direction. A bias is generated on the blast fan due to the resulting reactive force, the blast fan becomes free from the restraint of the first fixture, and shifts from the first position to the second position. Conversely, to transition from another state to the image formation state, a strong blast is sent in the same direction as the normal blast direction, and the blast fan shifts from the second position to the first position.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: November 27, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hiroaki Takatsu, Satoru Sasaki, Akinori Kimata, Natsuyo Higashi, Hirotada Seki
  • Publication number: 20110319244
    Abstract: In a paper folding device, a first driving unit for forming a first folding line on the paper moves a first folding plate member to the paper fed to a first feeding position until load on the first folding plate member reaches a prescribed value or higher. A time period from the start of driving of the first folding unit by the first driving unit to the start of driving of a second folding unit by a second driving unit is determined based on characteristic of paper.
    Type: Application
    Filed: June 10, 2011
    Publication date: December 29, 2011
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Teruhiko TOYOIZUMI, Takashi WATANABE, Hiroaki TAKATSU, Hitoshi ASANO, Takafumi TANAKA