Patents by Inventor Yuji Kamiyama

Yuji Kamiyama 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: 20210109459
    Abstract: A developing device includes a developer container, a developer carrier, and a stirring/conveying member. The developer container stores developer containing toner. The developer carrier carries on its surface the toner in the developer container. The stirring/conveying member includes a rotary shaft rotatably supported on the developer container and a stirring blade formed around the outer circumferential face of the rotary shaft and stirs and conveys the developer in the developer container. The stirring/conveying member to be used can be selected from a plurality of types of stirring/conveying members with rotary shafts with different shaft diameters.
    Type: Application
    Filed: September 24, 2020
    Publication date: April 15, 2021
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Ryo YAMADA, Yuji KAMIYAMA, Yu SASAKI, Ikuo MAKIE
  • Publication number: 20210055674
    Abstract: A developing device includes a developing container, a first stirring member and a second stirring member, and a developing roller. The developing container includes a first stirring chamber, a second stirring chamber, and a communication portion. The first stirring member includes a reverse spiral vane that conveys a developer in a direction reverse to a circulation direction. An air discharge duct is formed on a wall portion of the first stirring chamber opposed to the reverse spiral vane and in an area excluding the communication portion and discharges air from the first stirring chamber to an outside of the developing container via an air discharge port at a distal end of the air discharge duct. A filtration portion is disposed in the air discharge duct adjacently to the air discharge port and restricts leakage of the developer through the air discharge port.
    Type: Application
    Filed: August 17, 2020
    Publication date: February 25, 2021
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Minoru WADA, Yuji KAMIYAMA, Ikuo MAKIE, Yu SASAKI, Yukari OTA, Ryo YAMADA
  • Patent number: 10642196
    Abstract: A cleaning device has a housing where an opening and a toner storage portion are formed, a cleaning member arranged in the opening, a collection roller collecting toner attached to the cleaning member, a blade scraping off toner attached to the collection roller, a sheet member dividing between the toner storage portion and the opening, and a sealing member arranged to be in contact with the housing and both end parts of the outer circumferential surface of the collection roller in the axial direction. A first region having a predetermined surface roughness is formed in a middle part of the circumferential surface of the collection roller in the axial direction, and a second region having a lower surface roughness than the first region is formed next to both end parts of the first region in the axial direction.
    Type: Grant
    Filed: June 25, 2019
    Date of Patent: May 5, 2020
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Yoji Ueda, Yuji Kamiyama
  • Publication number: 20200057403
    Abstract: A cleaning device has a housing where an opening and a toner storage portion are formed, a cleaning member arranged in the opening, a collection roller collecting toner attached to the cleaning member, a blade scraping off toner attached to the collection roller, a sheet member dividing between the toner storage portion and the opening, and a sealing member arranged to be in contact with the housing and both end parts of the outer circumferential surface of the collection roller in the axial direction. A first region having a predetermined surface roughness is formed in a middle part of the circumferential surface of the collection roller in the axial direction, and a second region having a lower surface roughness than the first region is formed next to both end parts of the first region in the axial direction.
    Type: Application
    Filed: June 25, 2019
    Publication date: February 20, 2020
    Applicant: KYOCERA Document Solutions Inc.
    Inventors: Yoji UEDA, Yuji KAMIYAMA
  • Patent number: 10042283
    Abstract: A developing device includes a developing roller, a toner supply roller, a regulating blade, a casing, and a cleaning member. The developing roller supplies a toner to the image carrier in a region opposed to an image carrier. The toner supply roller is located opposed to the developing roller. The toner supply roller forms a magnetic brush made of a two-component developer including a magnetic carrier and a toner on an outer peripheral surface to supply a toner to the developing roller in a region opposed to the developing roller. The regulating blade is located opposed to the toner supply roller at a predetermined interval. The casing houses the developing roller, the toner supply roller, and the regulating blade. The cleaning member reciprocates along a longitudinal direction of the regulating blade so as to remove a toner accumulated on a top surface of the regulating blade.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: August 7, 2018
    Assignee: Kyocera Document Solutions Inc.
    Inventor: Yuji Kamiyama
  • Publication number: 20180011419
    Abstract: A developing device includes a developing roller, a toner supply roller, a regulating blade, a casing, and a cleaning member. The developing roller supplies a toner to the image carrier in a region opposed to an image carrier. The toner supply roller is located opposed to the developing roller. The toner supply roller forms a magnetic brush made of a two-component developer including a magnetic carrier and a toner on an outer peripheral surface to supply a toner to the developing roller in a region opposed to the developing roller. The regulating blade is located opposed to the toner supply roller at a predetermined interval. The casing houses the developing roller, the toner supply roller, and the regulating blade. The cleaning member reciprocates along a longitudinal direction of the regulating blade so as to remove a toner accumulated on a top surface of the regulating blade.
    Type: Application
    Filed: July 5, 2017
    Publication date: January 11, 2018
    Inventor: Yuji Kamiyama
  • Patent number: 9304445
    Abstract: A developing roller includes a roller main body disposed to face, without contact, an outer circumferential surface of an image carrier. The roller main body includes an aluminum oxide thin film and a resin coat layer, the aluminum oxide thin film being formed on an outer circumferential surface of a base body that is made of a metal including aluminum, the resin coat layer being formed on a surface of the aluminum oxide thin film that has been subjected to a predetermined heating process, the resin coat layer being made of a resin material and having electric conductivity.
    Type: Grant
    Filed: December 17, 2014
    Date of Patent: April 5, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Masashi Fujishima, Yuji Kamiyama, Tamotsu Shimizu, Shizuka Okada, Sakae Saito, Yasuhiro Oishi
  • Patent number: 9274453
    Abstract: A developing roller includes a roller main body disposed to face, without contact, an outer circumferential surface of an image carrier. In the roller main body, a boehmite layer has been formed on an outer circumferential surface of a base body that is made of a metal including aluminum, by a surface treatment by a boehmite method, and a resin coat layer has been formed on a surface of the boehmite layer, the resin coat layer being made of a resin material having electric conductivity.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: March 1, 2016
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Yasuhiro Oishi, Yuji Kamiyama, Akihiro Watanabe, Tamotsu Shimizu, Yoshinobu Yoneima, Shizuka Okada, Sakae Saito
  • Patent number: 9207623
    Abstract: The neutralization units 12a and 12b are arranged between the primary transfer positions and the cleaning units 11a and 11b, and, irradiate a region on the image supporting body 2a with first neutralization light 131, the regions spanning from a position facing the primary transfer position to a position facing the cleaning unit 11a. The neutralization units 12a and 12b irradiate a region on the image supporting body 2b with second neutralization light 132, the region spanning from a position facing the developing unit 16b to a position facing the primary transfer position. The neutralization units 12a and 12b include a first reflective part and a second reflective part provided at different positions on a side face of the light guiding body. The first reflective part forms the light 131 and the second reflective part forms the light 132 by reflecting the light from the neutralization light source.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: December 8, 2015
    Assignee: KYOCERA DOCUMENT SOLUTIONS INC.
    Inventor: Yuji Kamiyama
  • Patent number: 9201349
    Abstract: Developing device includes developing roller and magnetic roller. Developing roller includes aluminum oxide thin film and resin coat layer. Magnetic roller is disposed to face, without contact, outer circumferential surface of developing roller, and includes aluminum oxide thin film formed on outer circumferential surface of base body that is made of metal including aluminum. Magnetic roller forms toner layer on surface of developing roller via magnetic brush composed of toner and magnetic carrier. AC impedance Z1 is in range from 1.0×105? to 1.0×106? and surface roughness Ra of resin coat layer is in range from 0.057 ?m to 0.280 ?m, AC impedance Z1 being obtained when AC voltage at predetermined frequency is applied to between base body of magnetic roller and base body of developing roller in a state where the magnetic brush is formed on magnetic roller.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: December 1, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Tamotsu Shimizu, Shizuka Okada, Yuji Kamiyama, Sakae Saito, Yasuhiro Oishi, Masashi Fujishima, Chikara Ishihara
  • Patent number: 9195159
    Abstract: The exposing unit emits a pair of light beams deflected to reverse scanning directions each other by a rotary polyhedron. The pattern creation unit creates color misregistration detection patterns on the transfer unit by the toner image in a reference color formed by a light beam emitted from an exposing unit and the toner image in an adjustment color formed by the other light beam having a different scanning direction. The color misregistration correction unit, on the basis of the image forming position of the toner image in the reference color, moves an image forming position of the toner image in each color formed by the light beam having the scanning direction opposite to the light beam corresponding to the reference color according to the color misregistration adjustment amount detected by the adjustment amount detection unit.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: November 24, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Yuji Kamiyama
  • Patent number: 9122193
    Abstract: A developing roller includes a roller main body disposed to face, without contact, an outer circumferential surface of an image carrier. A resin coat layer has been formed on an outer circumferential surface of the roller main body, the resin coat layer being made of a resin material having electric conductivity. A product of resistance component Rs [?] and electrostatic capacitance component Cs [F] in AC impedance Z of the roller main body is in a range from 2.79×10?7 to 6.77×10?5, the AC impedance Z being obtained when an AC voltage of a predetermined frequency f is applied.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: September 1, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Yoshinobu Yoneima, Yuji Kamiyama, Akihiro Watanabe, Tamotsu Shimizu, Shizuka Okada, Sakae Saito, Yasuhiro Oishi, Chikara Ishihara, Masashi Fujishima, Yoshimi Shimizu, Yasuhiro Tauchi, Yu Sasaki
  • Patent number: 9122194
    Abstract: A developing roller includes a roller main body disposed to face, without contact, an outer circumferential surface of an image carrier. The roller main body includes a resin coat layer that is formed on an outer circumferential surface of a base body that is made of a metal including aluminum, the resin coat layer being made of a resin material and having electric conductivity. An AC impedance Z obtained from an application of an AC voltage at a frequency in a range from 0.05 Hz to 100 Hz is equal to or higher than 100?, and a phase angle ? satisfies a relationship of 0 rad<?<0.1 rad when a power factor is cos ?=Za/Z.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: September 1, 2015
    Assignee: KYOCERA Document Solutions Inc.
    Inventors: Tamotsu Shimizu, Yuji Kamiyama, Akihiro Watanabe, Yoshinobu Yoneima, Shizuka Okada, Sakae Saito, Yasuhiro Oishi
  • Publication number: 20150177642
    Abstract: A developing roller includes a roller main body disposed to face, without contact, an outer circumferential surface of an image carrier. A resin coat layer has been formed on an outer circumferential surface of the roller main body, the resin coat layer being made of a resin material having electric conductivity. A product of resistance component Rs [?] and electrostatic capacitance component Cs [F] in AC impedance Z of the roller main body is in a range from 2.79×10?7 to 6.77×10?5, the AC impedance Z being obtained when an AC voltage of a predetermined frequency f is applied.
    Type: Application
    Filed: December 15, 2014
    Publication date: June 25, 2015
    Inventors: Yoshinobu Yoneima, Yuji Kamiyama, Akihiro Watanabe, Tamotsu Shimizu, Shizuka Okada, Sakae Saito, Yasuhiro Oishi, Chikara Ishihara, Masashi Fujishima, Yoshimi Shimizu, Yasuhiro Tauchi, Yu Sasaki
  • Publication number: 20150177652
    Abstract: Developing device includes developing roller and magnetic roller. Developing roller includes aluminum oxide thin film and resin coat layer. Magnetic roller is disposed to face, without contact, outer circumferential surface of developing roller, and includes aluminum oxide thin film formed on outer circumferential surface of base body that is made of metal including aluminum. Magnetic roller forms toner layer on surface of developing roller via magnetic brush composed of toner and magnetic carrier. AC impedance Z1 is in range from 1.0×105? to 1.0×106? and surface roughness Ra of resin coat layer is in range from 0.057 ?m to 0.280 ?m, AC impedance Z1 being obtained when AC voltage at predetermined frequency is applied to between base body of magnetic roller and base body of developing roller in a state where the magnetic brush is formed on magnetic roller.
    Type: Application
    Filed: December 15, 2014
    Publication date: June 25, 2015
    Inventors: Tamotsu Shimizu, Shizuka Okada, Yuji Kamiyama, Sakae Saito, Yasuhiro Oishi, Masashi Fujishima, Chikara Ishihara
  • Publication number: 20150177651
    Abstract: A developing roller includes a roller main body disposed to face, without contact, an outer circumferential surface of an image carrier. The roller main body includes an aluminum oxide thin film and a resin coat layer, the aluminum oxide thin film being formed on an outer circumferential surface of a base body that is made of a metal including aluminum, the resin coat layer being formed on a surface of the aluminum oxide thin film that has been subjected to a predetermined heating process, the resin coat layer being made of a resin material and having electric conductivity.
    Type: Application
    Filed: December 17, 2014
    Publication date: June 25, 2015
    Inventors: Masashi Fujishima, Yuji Kamiyama, Tamotsu Shimizu, Shizuka Okada, Sakae Saito, Yasuhiro Oishi
  • Publication number: 20150177644
    Abstract: A developing roller includes a roller main body disposed to face, without contact, an outer circumferential surface of an image carrier. The roller main body includes a resin coat layer that is formed on an outer circumferential surface of a base body that is made of a metal including aluminum, the resin coat layer being made of a resin material and having electric conductivity. An AC impedance Z obtained from an application of an AC voltage at a frequency in a range from 0.05 Hz to 100 Hz is equal to or higher than 100?, and a phase angle ? satisfies a relationship of 0 rad<?<0.1 rad when a power factor is cos ?=Za/Z.
    Type: Application
    Filed: December 16, 2014
    Publication date: June 25, 2015
    Inventors: Tamotsu Shimizu, Yuji Kamiyama, Akihiro Watanabe, Yoshinobu Yoneima, Shizuka Okada, Sakae Saito, Yasuhiro Oishi
  • Publication number: 20150177643
    Abstract: A developing roller includes a roller main body disposed to face, without contact, an outer circumferential surface of an image carrier. In the roller main body, a boehmite layer has been formed on an outer circumferential surface of a base body that is made of a metal including aluminum, by a surface treatment by a boehmite method, and a resin coat layer has been formed on a surface of the boehmite layer, the resin coat layer being made of a resin material having electric conductivity.
    Type: Application
    Filed: December 15, 2014
    Publication date: June 25, 2015
    Inventors: Yasuhiro Oishi, Yuji Kamiyama, Akihiro Watanabe, Tamotsu Shimizu, Yoshinobu Yoneima, Shizuka Okada, Sakae Saito
  • Publication number: 20150117912
    Abstract: The exposing unit emits a pair of light beams deflected to reverse scanning directions each other by a rotary polyhedron. The pattern creation unit creates color misregistration detection patterns on the transfer unit by the toner image in a reference color formed by a light beam emitted from an exposing unit and the toner image in an adjustment color formed by the other light beam having a different scanning direction. The color misregistration collection unit, on the basis of the image forming position of the toner image in the reference color, moves an image forming position of the toner image in each color formed by the light beam having the scanning direction opposite to the light beam corresponding to the reference color according to the color misregistration adjustment amount detected by the adjustment amount detection unit.
    Type: Application
    Filed: October 24, 2014
    Publication date: April 30, 2015
    Applicant: KYOCERA Document Solutions Inc.
    Inventor: Yuji KAMIYAMA
  • Patent number: 8824909
    Abstract: An image forming apparatus includes a magnetic roller voltage applier for a magnetic roller, a developing roller voltage applier for a developing roller and a controller for controlling the appliers. The controller controls the magnetic roller voltage applier to apply, to the magnetic roller, a first voltage for forcibly conveying a thin layer of toner held on the developing roller toward the magnetic roller for a first period required for one turn of the developing roller, and controls the developing roller voltage applier to apply, to the developing roller, a second voltage for causing toner on the developing roller to fly onto the image carrier for a second period when at least the forcible consumption electrostatic latent image faces a facing portion between the developing roller and the magnetic roller. At least parts of the first period and the second period are overlapped with each other.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: September 2, 2014
    Assignee: Kyocera Document Solutions Inc.
    Inventor: Yuji Kamiyama