Patents by Inventor Yuji Kamoda

Yuji Kamoda 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: 20200192240
    Abstract: A developing device includes a developer casing, a developer detector, and a hardware processor that performs control to set a developer amount range to either a first detection condition or a second detection condition. The hardware processor determines whether or not a developer amount within the developer casing has exceeded an acceptable value, based on a detection result in the developer detector under the second detection condition.
    Type: Application
    Filed: December 4, 2019
    Publication date: June 18, 2020
    Inventors: Shota SAKURAI, Hiroyuki SAITO, Yuji KAMODA, Tatsuya FURUTA
  • Patent number: 10642202
    Abstract: An image forming apparatus includes: an image carrier rotatably supported; a lubricant supplier that supplies lubricant to a surface of the image carrier; a blade that levels the lubricant supplied from the lubricant supplier in a film-like form on the surface of the image carrier; and a controller that controls image formation, wherein the controller has a lubricant removal mode to remove the lubricant accumulated on the blade, the lubricant removal mode includes a plurality of displacement modes each of which imparts different displacement to the blade, in each of the displacement modes, one of a displacement amount, a displacement speed, a displacement period, a displacement angle, and a displacement position of the blade is different, and the controller performs switching between the displacement modes dining execution of the lubricant removal mode.
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: May 5, 2020
    Assignee: Konica Minolta Inc.
    Inventors: Yuji Kamoda, Shota Sakurai, Hiroyuki Saito, Tatsuya Furuta
  • Publication number: 20200073297
    Abstract: An image forming apparatus includes: an image carrier rotatably supported; a lubricant supplier that supplies lubricant to a surface of the image carrier, a blade that levels the lubricant supplied from the lubricant supplier in a film-like form on the surface of the image carrier, and a controller that controls image formation, wherein the controller has a lubricant removal mode to remove the lubricant accumulated on the blade, the lubricant removal mode includes a plurality of displacement modes each of which imparts different displacement to the blade, in each of the displacement modes, one of a displacement amount, a displacement speed, a displacement period, a displacement angle, and a displacement position of the blade is different, and the controller performs switching between the displacement modes during execution of the lubricant removal mode.
    Type: Application
    Filed: August 7, 2019
    Publication date: March 5, 2020
    Inventors: Yuji KAMODA, Shota SAKURAI, Hiroyuki SAITO, Tatsuya FURUTA
  • Patent number: 9594340
    Abstract: An image forming apparatus includes: an image bearing body; a developing unit which develops an electrostatic latent image formed on the image bearing body as a toner image; a transfer unit which transfers the toner image to a receiver medium; a cleaning member which collects residual toner on the image bearing body; a lubricant supply unit which supplies lubricant onto the image bearing body; a measurement unit which measures a static frictional force generated between the image bearing body and the cleaning member; and a control unit which corrects the amount of lubricant on the image bearing body, wherein the control unit estimates a state of the lubricant on the image bearing body based on a change between a first and a second static frictional force, and based on the estimated state, the control unit selectively executes one of processing of supplying lubricant and processing of removing lubricant.
    Type: Grant
    Filed: January 14, 2016
    Date of Patent: March 14, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kazuko Fukumoto, Yuji Kamoda, Yasuo Shirodai, Yuya Sato, Kunitomo Sasaki
  • Publication number: 20160209800
    Abstract: An image forming apparatus includes: an image bearing body; a developing unit which develops an electrostatic latent image formed on the image bearing body as a toner image; a transfer unit which transfers the toner image to a receiver medium; a cleaning member which collects residual toner on the image bearing body; a lubricant supply unit which supplies lubricant onto the image bearing body; a measurement unit which measures a static frictional force generated between the image bearing body and the cleaning member; and a control unit which corrects the amount of lubricant on the image bearing body, wherein the control unit estimates a state of the lubricant on the image bearing body based on a change between a first and a second static frictional force, and based on the estimated state, the control unit selectively executes one of processing of supplying lubricant and processing of removing lubricant.
    Type: Application
    Filed: January 14, 2016
    Publication date: July 21, 2016
    Applicant: Konica Minolta, Inc.
    Inventors: Kazuko FUKUMOTO, Yuji KAMODA, Yasuo SHIRODAI, Yuya SATO, Kunitomo SASAKI
  • Patent number: 9389562
    Abstract: An image forming apparatus includes: an image carrier; a development unit configured to develop, as a toner image, an electrostatic latent image formed on the image carrier; a transfer unit configured to transfer the toner image to a medium to which a toner image is to be transferred; a cleaning unit configured to recover toner remaining on the image carrier after transferring the toner image; a lubricant supply unit configured to supply lubricant on the image carrier; a charge unit disposed between the development unit and the cleaning unit, along a surface of the image carrier; and a control unit configured to perform a first mode and a second mode, the first mode configured to form the toner image, the second mode configured to allow the charge unit to increase the amount of charge on toner reaching the cleaning unit relative to that in the first mode.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: July 12, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Kunitomo Sasaki, Kazuko Fukumoto, Yuji Kamoda, Yasuo Shirodai, Yuya Sato
  • Publication number: 20160179046
    Abstract: An image forming apparatus includes: an image carrier; a development unit configured to develop, as a toner image, an electrostatic latent image formed on the image carrier; a transfer unit configured to transfer the toner image to a medium to which a toner image is to be transferred; a cleaning unit configured to recover toner remaining on the image carrier after transferring the toner image; a lubricant supply unit configured to supply lubricant on the image carrier; a charge unit disposed between the development unit and the cleaning unit, along a surface of the image carrier; and a control unit configured to perform a first mode and a second mode, the first mode configured to form the toner image, the second mode configured to allow the charge unit to increase the amount of charge on toner reaching the cleaning unit relative to that in the first mode.
    Type: Application
    Filed: December 17, 2015
    Publication date: June 23, 2016
    Applicant: KONICA MINOLTA, INC.
    Inventors: Kunitomo SASAKI, Kazuko FUKUMOTO, Yuji KAMODA, Yasuo SHIRODAI, Yuya SATO
  • Patent number: 9316953
    Abstract: A wet-type image formation apparatus includes: an intermediate transfer body that carries a toner image including toner particles, which are charged to have a first polarity, and a carrier liquid; a transferring roller that transfers a toner image onto a transfer surface of a recording medium; a charging device that charges the transfer surface to have a second polarity opposite to the first polarity; and a fixing mechanism that fixes the toner image. The fixing mechanism includes a noncontact heating device. The noncontact heating device forms the toner particles into a film such that the toner particles and the carrier liquid are separated from each other by heating the toner image when the toner particles charged to the first polarity is electrostatically adsorbed onto the transfer surface charged to have the second polarity. The film of the toner particles is fixed onto the transfer surface.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: April 19, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Junya Hirayama, Shigeo Uetake, Yuji Kamoda, Hirofumi Nakagawa, Toshiya Natsuhara
  • Patent number: 9316960
    Abstract: A fixing device includes: a non-contact heating portion that includes at least one non-contact heating unit which heats a toner image on a sheet; and a pressurizing and heating unit that is provided downstream in a sheet transport direction with respect to the non-contact heating portion and that pressurizes and heats the toner image. A time from a first point of time when the toner image reaches a toner melting temperature by heating of the non-contact heating portion to a second point of time when the toner image enters the pressurizing and heating unit is set equal to or more than a predetermined time. The predetermined time is a time when a ratio between the weight of the toner in the toner image before the entrance and the sum of the weight of the toner and the weight of the carrier liquid is equal to or more than 70%.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: April 19, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yuji Kamoda, Junya Hirayama, Shigeo Uetake, Tomohiko Masuda
  • Publication number: 20160070212
    Abstract: A fixing device includes: a non-contact heating portion that includes at least one non-contact heating unit which heats a toner image on a sheet; and a pressurizing and heating unit that is provided downstream in a sheet transport direction with respect to the non-contact heating portion and that pressurizes and heats the toner image. A time from a first point of time when the toner image reaches a toner melting temperature by heating of the non-contact heating portion to a second point of time when the toner image enters the pressurizing and heating unit is set equal to or more than a predetermined time. The predetermined time is a time when a ratio between the weight of the toner in the toner image before the entrance and the sum of the weight of the toner and the weight of the carrier liquid is equal to or more than 70%.
    Type: Application
    Filed: August 31, 2015
    Publication date: March 10, 2016
    Applicant: KONICA MINOLTA, INC.
    Inventors: Yuji KAMODA, Junya HIRAYAMA, Shigeo UETAKE, Tomohiko MASUDA
  • Patent number: 9195181
    Abstract: An image forming apparatus includes a noncontact heating device, a pressurizing and heating mechanism, and a control unit. The control unit switches an operation of the pressurizing and heating mechanism based on gloss level information of a recording medium. According to the image forming apparatus, assuming that a temperature of the recording medium after noncontact heating is T1, a temperature of the recording medium after pressurizing and heating is T2 and a toner concentration after noncontact heating is Tc1 when the gloss level information shows high gloss, and assuming that a temperature of the recording medium after noncontact heating is T3 and a toner concentration after noncontact heating is Tc2 when the gloss level information shows low gloss, the conditions of T1<T2, T1<T3, and Tc1<Tc2 are satisfied.
    Type: Grant
    Filed: January 16, 2014
    Date of Patent: November 24, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventors: Yuji Kamoda, Junya Hirayama, Shigeo Uetake, Toshiya Natsuhara
  • Patent number: 9188908
    Abstract: An infiltration amount measuring unit is provided to measure the amount of carrier liquid infiltrated in recording paper. An output signal of the infiltration amount measuring unit is input to a control device to be used to calculate a voltage supplied to a heat source (heater) in a pre-fixing unit. A signal of a paper temperature measuring unit is input to the control device, which determines whether a target temperature is reached. The control device estimates the amount of carrier liquid in a toner layer based on the information from the infiltration amount measuring unit. Then, the pre-fixing unit is controlled such that the amount of carrier liquid in the toner layer falls within an appropriate range, based on the estimation result of the amount of carrier liquid.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: November 17, 2015
    Assignee: KONICA MINOLTA, INC.
    Inventors: Junya Hirayama, Shigeo Uetake, Yuji Kamoda, Toshiya Natsuhara
  • Patent number: 9081343
    Abstract: An image forming apparatus includes a fixing device for heating and pressing a toner image on a recording medium, a non-contact heating device arranged downstream of the fixing device for heating the toner image without coming into contact with the toner image, and a pressure contact device arranged downstream of the non-contact heating device and having a smooth surface. The pressure contact device has first and second arrangement states switched according to the kind of the recording medium. In the first arrangement state, the pressure contact device is arranged so as to make pressure contact with the toner image. In the second arrangement state, the pressure contact device is arranged so as not to make pressure contact with the toner image.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: July 14, 2015
    Assignee: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Yuji Kamoda, Junya Hirayama, Shigeo Uetake, Toshiya Natsuhara
  • Patent number: 8892019
    Abstract: An image forming apparatus for forming an image on a recording medium includes a fixing unit configured to fix on a recording medium, a toner image formed on the recording medium, through heating and pressurization and a gloss control unit configured to lower gloss of a surface of the toner image by charging the surface of the toner image fixed onto the recording medium and heating the toner image such that toner contained in the toner image reaches a softening point or higher thereof.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 18, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Junya Hirayama, Shigeo Uetake, Yuji Kamoda, Toshiya Natsuhara
  • Publication number: 20140321892
    Abstract: A wet-type image formation apparatus includes: an intermediate transfer body that carries a toner image including toner particles, which are charged to have a first polarity, and a carrier liquid; a transferring roller that transfers a toner image onto a transfer surface of a recording medium; a charging device that charges the transfer surface to have a second polarity opposite to the first polarity; and a fixing mechanism that fixes the toner image. The fixing mechanism includes a noncontact heating device. The noncontact heating device forms the toner particles into a film such that the toner particles and the carrier liquid are separated from each other by heating the toner image when the toner particles charged to the first polarity is electrostatically adsorbed onto the transfer surface charged to have the second polarity. The film of the toner particles is fixed onto the transfer surface.
    Type: Application
    Filed: April 15, 2014
    Publication date: October 30, 2014
    Applicant: KONICA MINOLTA, INC.
    Inventors: Junya HIRAYAMA, Shigeo Uetake, Yuji Kamoda, Hirofumi Nakagawa, Toshiya Natsuhara
  • Patent number: 8867950
    Abstract: A wet-type image forming apparatus includes: a heating unit configured to heat a recording medium and to volatilize liquid carrier in a toner image; a fixing unit configured to fix the toner image on the recording medium and disposed at a downstream side of the heating unit in a conveyance direction of the recording medium; a conveyance unit configured to convey the recording medium from the heating unit to the fixing unit; and a housing disposed to cover the conveyance unit, wherein the recording medium is conveyed on the conveyance unit in the housing toward the fixing unit after heated by the heating unit, in the presence of gas containing the volatilized liquid carrier, and the volatilized liquid carrier is cooled and turned into fine mist liquid carrier and then the fine mist liquid carrier attaches to the recording medium before the recording medium reaches the fixing unit.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: October 21, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Shigeo Uetake, Junya Hirayama, Yuji Kamoda, Toshiya Natsuhara
  • Publication number: 20140205308
    Abstract: An image forming apparatus includes a noncontact heating device, a pressurizing and heating mechanism, and a control unit. The control unit switches an operation of the pressurizing and heating mechanism based on gloss level information of a recording medium. According to the image forming apparatus, assuming that a temperature of the recording medium after noncontact heating is T1, a temperature of the recording medium after pressurizing and heating is T2 and a toner concentration after noncontact heating is Tc1 when the gloss level information shows high gloss, and assuming that a temperature of the recording medium after noncontact heating is T3 and a toner concentration after noncontact heating is Tc2 when the gloss level information shows low gloss, the conditions of T1<T2, T1<T3, and Tc1<Tc2 are satisfied.
    Type: Application
    Filed: January 16, 2014
    Publication date: July 24, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Yuji KAMODA, Junya Hirayama, Shigeo Uetake, Toshiya Natsuhara
  • Patent number: 8630568
    Abstract: Provided is a liquid development apparatus having a constitution in which liquid developer containing carrier liquid with toner dispersed therein is supplied from a liquid developer/cleaning liquid supply member on a pool forming member arranged facing to a supply roller so as to form a pool of the liquid developer, from which pool the liquid developer is supplied to the supply roller, wherein a liquid developer/cleaning liquid supply member supplies cleaning liquid on a pool forming member to form a suitable pooling portion of the cleaning liquid and the liquid developer remaining on the surface of the supply roller is removed and cleaned.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: January 14, 2014
    Assignee: Konica Minolta Holdings, Inc.
    Inventors: Naoki Yoshie, Yuji Kamoda, Keiko Momotani, Kazuko Fukumoto, Yasuo Shirodai, Eiji Tabata
  • Publication number: 20130243503
    Abstract: An image forming apparatus for forming an image on a recording medium includes a fixing unit configured to fix on a recording medium, a toner image formed on the recording medium, through heating and pressurization and a gloss control unit configured to lower gloss of a surface of the toner image by charging the surface of the toner image fixed onto the recording medium and heating the toner image such that toner contained in the toner image reaches a softening point or higher thereof.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 19, 2013
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Junya HIRAYAMA, Shigeo UETAKE, Yuji KAMODA, Toshiya NATSUHARA
  • Publication number: 20130209150
    Abstract: An image forming apparatus includes a fixing device for heating and pressing a toner image on a recording medium, a non-contact heating device arranged downstream of the fixing device for heating the toner image without coming into contact with the toner image, and a pressure contact device arranged downstream of the non-contact heating device and having a smooth surface. The pressure contact device has first and second arrangement states switched according to the kind of the recording medium. In the first arrangement state, the pressure contact device is arranged so as to make pressure contact with the toner image. In the second arrangement state, the pressure contact device is arranged so as not to make pressure contact with the toner image.
    Type: Application
    Filed: February 8, 2013
    Publication date: August 15, 2013
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Yuji KAMODA, Junya Hirayama, Shigeo Uetake, Toshiya Natsuhara