Patents by Inventor Hironori Akashi

Hironori Akashi 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).

  • Patent number: 10782640
    Abstract: An image forming device that forms a toner image on a surface of a photoreceptor, transfers the toner image to a recording material and outputs a printed recording material, includes: an intermediate transfer body that primarily transfers the toner image on the photoreceptor and secondarily transfers the toner image to the recording material; a cleaner that removes a toner left on the surface of the photoreceptor; a patch forming unit that forms a toner patch between two adjacent toner images when multiple toner images are continuously formed on the surface of the photoreceptor; a concentration detector that detects concentration of the toner patch primarily transferred to the intermediate transfer body from the photoreceptor; and a patch adjuster that adjusts toner amount used for forming the toner patch based on a result detected by the concentration detector.
    Type: Grant
    Filed: September 6, 2019
    Date of Patent: September 22, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hironori Akashi, Soh Hirota, Shigeki Naiki
  • Patent number: 10613452
    Abstract: An image forming apparatus includes: an image forming part that forms a toner image on a recording medium; and a hardware processor that controls the image forming part, wherein the image forming part includes an image carrier, the hardware processor executes: a first adjustment process of adjusting the image forming part with use of a first image formation condition determined in accordance with a toner adhesion amount at a plurality of points in a first direction on the image carrier; and a second adjustment process of adjusting the image forming part with use of a second image formation condition determined in accordance with a toner adhesion amount at one point in a first direction on the image carrier, the image carrier rotates as a recording medium is conveyed, the first direction is a direction intersecting with a rotational direction of the image carrier.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: April 7, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Shigeki Naiki, Teppei Kunihisa, Soh Hirota, Hironori Akashi, Kenji Tsuru
  • Publication number: 20200081384
    Abstract: An image forming device that forms a toner image on a surface of a photoreceptor, transfers the toner image to a recording material and outputs, comprises: an intermediate transfer body that primarily transfers the toner image on the photoreceptor and secondarily transfers the toner image to the recording material; a cleaner that removes a toner left on the surface of the photoreceptor; a patch forming unit that forms a toner patch between two adjacent toner images when multiple toner images are continuously formed on the surface of the photoreceptor; a concentration detector that detects concentration of the toner patch primarily transferred to the intermediate transfer body from the photoreceptor; and a patch adjuster that adjusts toner amount used for forming the toner patch based on a result detected by the concentration detector.
    Type: Application
    Filed: September 6, 2019
    Publication date: March 12, 2020
    Inventors: Hironori AKASHI, Soh HIROTA, Shigeki NAIKI
  • Patent number: 10437539
    Abstract: An image forming apparatus includes: an image forming unit configured to form an image on a recording medium; a server unit having a server function; a casing having the image forming unit housed therein; and a cabinet arranged below the casing and having the server unit housed therein. The cabinet serves as a partition between the image forming unit and the server unit, and is provided as a housing separately from the casing.
    Type: Grant
    Filed: January 3, 2018
    Date of Patent: October 8, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hironori Akashi, Ryutaro Taira, Hironao Miyamoto
  • Publication number: 20190278197
    Abstract: An image forming apparatus includes: an image forming part that forms a toner image on a recording medium; and a hardware processor that controls the image forming part, wherein the image forming part includes an image carrier, the hardware processor executes: a first adjustment process of adjusting the image forming part with use of a first image formation condition determined in accordance with a toner adhesion amount at a plurality of points in a first direction on the image carrier, and a second adjustment process of adjusting the image forming part with use of a second image formation condition determined in accordance with a toner adhesion amount at one point in a first direction on the image carrier, the image carrier rotates as a recording medium is conveyed, the first direction is a direction intersecting with a rotational direction of the image carrier.
    Type: Application
    Filed: February 5, 2019
    Publication date: September 12, 2019
    Inventors: SHIGEKI NAIKI, TEPPEI KUNIHISA, SOH HIROTA, HIRONORI AKASHI, KENJI TSURU
  • Publication number: 20180189007
    Abstract: An image forming apparatus includes: an image forming unit configured to form an image on a recording medium; a server unit having a server function; a casing having the image forming unit housed therein; and a cabinet arranged below the casing and having the server unit housed therein. The cabinet serves as a partition between the image forming unit and the server unit, and is provided as a housing separately from the casing.
    Type: Application
    Filed: January 3, 2018
    Publication date: July 5, 2018
    Inventors: Hironori AKASHI, Ryutaro TAIRA, Hironao MIYAMOTO
  • Patent number: 9880487
    Abstract: An image forming apparatus for electrifying a surface of a photoreceptor with the use of an electrification member includes: a first output unit configured to output a first AC voltage; a second output unit configured to output a second AC voltage having the same frequency as a frequency of the first AC voltage and having a phase different from a phase of the first AC voltage; a superimposition unit configured to superimpose, on a DC component, an AC component containing at least one of the first AC voltage and the second AC voltage; and an application unit configured to apply a voltage that has been subjected to superimposition by the superimposition unit to the electrification member, wherein the superimposition unit changes the AC component to be superimposed on the DC component at a predetermined timing.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: January 30, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Masahiro Kouzaki, Munenori Nakano, Hironori Akashi, Kenji Tsuru, Yoshinori Tsutsumi
  • Patent number: 9846398
    Abstract: An image forming apparatus which forms an image on a medium on the basis of an input image signal includes: an image carrier configured to carry a developed toner image transferred to the medium on a photoreceptor layer; a contact member arranged so as to be in contact with the surface of the photoreceptor layer; a trace pattern generating unit configured to generate a trace pattern indicating specific information on the image forming apparatus; a composition unit configured to add the trace pattern to the image signal; and an acquiring unit configured to acquire information on the thickness of the photoreceptor layer of the image carrier, wherein the trace pattern is used for arranging a plurality of image areas at respective positions, and the trace pattern generating unit is configured to generate the trace pattern with the image area whose size is reduced in accordance with reduction of the thickness of the photoreceptor layer.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: December 19, 2017
    Assignee: KONICA MINOLTA, INC.
    Inventors: Hironori Akashi, Masahiro Kouzaki
  • Publication number: 20170242383
    Abstract: An image forming apparatus which forms an image on a medium on the basis of an input image signal includes: an image carrier configured to carry a developed toner image transferred to the medium on a photoreceptor layer; a contact member arranged so as to be in contact with the surface of the photoreceptor layer; a trace pattern generating unit configured to generate a trace pattern indicating specific information on the image forming apparatus; a composition unit configured to add the trace pattern to the image signal; and an acquiring unit configured to acquire information on the thickness of the photoreceptor layer of the image carrier, wherein the trace pattern is used for arranging a plurality of image areas at respective positions, and the trace pattern generating unit is configured to generate the trace pattern with the image area whose size is reduced in accordance with reduction of the thickness of the photoreceptor layer.
    Type: Application
    Filed: February 15, 2017
    Publication date: August 24, 2017
    Inventors: Hironori AKASHI, Masahiro KOUZAKI
  • Publication number: 20170168411
    Abstract: An image forming apparatus for electrifying a surface of a photoreceptor with the use of an electrification member includes: a first output unit configured to output a first AC voltage; a second output unit configured to output a second AC voltage having the same frequency as a frequency of the first AC voltage and having a phase different from a phase of the first AC voltage; a superimposition unit configured to superimpose, on a DC component, an AC component containing at least one of the first AC voltage and the second AC voltage; and an application unit configured to apply a voltage that has been subjected to superimposition by the superimposition unit to the electrification member, wherein the superimposition unit changes the AC component to be superimposed on the DC component at a predetermined timing.
    Type: Application
    Filed: December 8, 2016
    Publication date: June 15, 2017
    Applicant: Konica Minolta, Inc.
    Inventors: Masahiro Kouzaki, Munenori Nakano, Hironori Akashi, Kenji Tsuru, Yoshinori Tsutsumi
  • Patent number: 9253367
    Abstract: An image forming apparatus includes an image carrying member, a charging device that uniformly charges the image carrying member, an exposure device that forms an electrostatic latent image on the image carrying member, a development device that applies a development bias voltage to form a visible image in which toner is adhered to the electrostatic latent image, a control portion that controls an exposure amount in the exposure device and the development bias voltage and a storage portion that stores an exposure condition and a development condition. The resolution of image data can be switched to at least two types, a standard resolution and a high resolution higher than the standard resolution, and when the resolution of the image data is set at the high resolution, the control portion controls the exposure amount in the exposure device to perform thinning processing on the image.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: February 2, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Mitsuru Obara, Tetsuya Sakai, Munenori Nakano, Hironori Akashi, Tomoyuki Saito
  • Publication number: 20150264221
    Abstract: An image forming apparatus includes an image carrying member, a charging device that uniformly charges the image carrying member, an exposure device that forms an electrostatic latent image on the image carrying member, a development device that applies a development bias voltage to form a visible image in which toner is adhered to the electrostatic latent image, a control portion that controls an exposure amount in the exposure device and the development bias voltage and a storage portion that stores an exposure condition and a development condition. The resolution of image data can be switched to at least two types, a standard resolution and a high resolution higher than the standard resolution, and when the resolution of the image data is set at the high resolution, the control portion controls the exposure amount in the exposure device to perform thinning processing on the image.
    Type: Application
    Filed: March 12, 2015
    Publication date: September 17, 2015
    Applicant: KONICA MINOLTA, INC.
    Inventors: Mitsuru OBARA, Tetsuya SAKAI, Munenori NAKANO, Hironori AKASHI, Tomoyuki SAITO
  • Patent number: 9008524
    Abstract: For each of N imaginary regions divided at predetermined intervals in the direction of the rotation shaft of a developer roller (12), the amount of toner consumed when an image is formed is previously calculated. Then, the same amount of toner as a toner consumption amount calculated for each imaginary region is supplied to a development device (2) earlier by a time in which the toner supplied from a toner hopper (5) is transported to each imaginary region than at the time of the development. Thus, it is possible to maintain a toner concentration within the development device within a predetermined range without the toner being dispersed and an image formation speed being reduced even if an image having a high print rate is formed.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: April 14, 2015
    Assignee: Konica Minolta, Inc.
    Inventors: Yusuke Mamiya, Soh Hirota, Hironori Akashi, Yoshinori Tsutsumi, Kanako Kibihara
  • Patent number: 8849147
    Abstract: An image forming apparatus having; image supporting members provided for a plurality of colors; chargers to be impressed with charging biases to charge the respective image supporting members; developing devices to be impressed with developing biases to develop latent images formed on the image supporting members; a charging bias power supply, including high-voltage DC power supply circuits and an AC power supply circuit, for applying the charging biases, which are generated by superposition of direct-current voltages and an alternate-current voltage, to the chargers; and a control circuit that performs stop processing to stop applications of the charging biases and the developing biases.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: September 30, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Junichi Arai, Hironori Akashi
  • Publication number: 20130322896
    Abstract: For each of N imaginary regions divided at predetermined intervals in the direction of the rotation shaft of a developer roller (12), the amount of toner consumed when an image is formed is previously calculated. Then, the same amount of toner as a toner consumption amount calculated for each imaginary region is supplied to a development device (2) earlier by a time in which the toner supplied from a toner hopper (5) is transported to each imaginary region than at the time of the development. Thus, it is possible to maintain a toner concentration within the development device within a predetermined range without the toner being dispersed and an image formation speed being reduced even if an image having a high print rate is formed.
    Type: Application
    Filed: May 31, 2013
    Publication date: December 5, 2013
    Inventors: Yusuke Mamiya, Soh Hirota, Hironori Akashi, Yoshinori Tsutsumi, Kanako Kibihara
  • Patent number: 8412063
    Abstract: An image forming apparatus has an image bearing member that moves at a specified speed; a toner pattern forming section for forming toner patterns of a specified type on the image bearing member under specified image forming conditions; a toner pattern detection member for detecting the toner patterns formed on the image bearing member; a toner amount varying section for varying a target amount of toner to adhere to the toner patterns; and a control section that calculates a toner adherence amount and a toner adherence position from detection results outputted from the toner pattern detection member and that performs image stabilization control to adjust the image forming conditions based on the calculation results. In the image stabilization control, the control section uses detection results of the same toner patterns both to calculate the toner adherence amount and to calculate the toner adherence position.
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: April 2, 2013
    Assignee: Konica Minolta Business Techologies, Inc.
    Inventors: Mitsuru Obara, Soh Hirota, Hironori Akashi, Takashi Harashima, Kanako Kibihara
  • Publication number: 20130077985
    Abstract: An image forming apparatus having; image supporting members provided for a plurality of colors; chargers to be impressed with charging biases to charge the respective image supporting members; developing devices to be impressed with developing biases to develop latent images formed on the image supporting members; a charging bias power supply, including high-voltage DC power supply circuits and an AC power supply circuit, for applying the charging biases, which are generated by superposition of direct-current voltages and an alternate-current voltage, to the chargers; and a control circuit that performs stop processing to stop applications of the charging biases and the developing biases.
    Type: Application
    Filed: September 20, 2012
    Publication date: March 28, 2013
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Junichi Arai, Hironori Akashi
  • Patent number: 8260160
    Abstract: A color image forming apparatus having photosensitive members; developing devices for developing electrostatic latent images formed on the photosensitive members into toner images with developers comprising toner and carriers; toner concentration sensors for detecting toner concentrations of the developers in the respective developing devices; a toner image bearing member for bearing the toner images temporarily; a toner adherence amount sensor for detecting toner adherence amounts of the toner images held on the image bearing member; and a controller for calculating, with respect to the developing devices, individual optimal developing bias voltage ranges within which a target toner adherence amount can be achieved while the toner concentrations of the developers are within a predetermined toner concentration range from a lower limit to an upper limit, so as to specify a common optimal developing bias voltage range that are commonly suitable for all the developing devices to achieve the target toner adherenc
    Type: Grant
    Filed: July 23, 2010
    Date of Patent: September 4, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hironori Akashi, Soh Hirota, Mitsuru Obara, Takashi Harashima, Kanako Kibihara
  • Patent number: 8081326
    Abstract: An image forming apparatus performs image stabilization after a printed page count exceeds a first threshold, if either an end of a job or a mode switch from monochrome mode to color mode has been detected. Even if neither the end of the job nor the mode switch from monochrome mode to color mode has been detected, the image forming apparatus performs image stabilization if the printed page count exceeds a second threshold that is larger than the first threshold.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: December 20, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kazuo Okunishi, Kohei Hayashi, Tetsuya Sakai, Hironori Akashi
  • Publication number: 20110229158
    Abstract: An image forming device includes a motor which generates motive power by current, a component driven by the motive power of the motor, and a motor current waveform determining unit which determines a condition of the image forming device on the basis of a current waveform of the current flowing through the motor while the motor is being driven. Accordingly, the image forming device which is capable of determining the condition of the device while suppressing an increase in the number of components and preventing reduction of productivity can be provided.
    Type: Application
    Filed: March 15, 2011
    Publication date: September 22, 2011
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Shinichi YABUKI, Hironori Akashi, Kunio Furukawa