Patents by Inventor Takafumi Koide

Takafumi Koide 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: 9709918
    Abstract: An image forming apparatus includes an image carrier; a charging device; an electrostatic image forming device that forms an electrostatic image; a developing device including a container that stores an electrostatic image developer containing a brilliant toner containing a substantially flake shape metal pigment, a developing member that is disposed so as to face, with a gap width, the image carrier and that develops the electrostatic image to form a toner image, and a voltage application unit, the apparatus satisfying 0.6×10?13C/particle?Q?3.0×10?13 C/particle??Formula (1): 150 g/m2 g/m2?M?300 g/m2??Formula (2): 0.8?M/L?1.4??Formula (3): where Q represents a charge amount per particle [C/particle] of the brilliant toner, M represents an amount [g/m2] of the electrostatic image developer carried by the developing member, and L represents the gap width [?m].
    Type: Grant
    Filed: September 1, 2016
    Date of Patent: July 18, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masataka Kuribayashi, Takafumi Koide, Yusuke Fukuda
  • Patent number: 9244392
    Abstract: An image forming apparatus includes a latent image forming unit that forms a latent image on a photoreceptor, a developing unit that accommodates a developer containing flake shape toner particles and develops the latent image using the developer to form a toner image on a surface of the photoreceptor, a transfer unit, a bias applying unit, and a fixing unit, wherein the flake shape toner particles have an average major axis length of from 7 ?m to 20 ?m and an average thickness of from 1 ?m to 3 ?m and contain a flake shape metallic pigment.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: January 26, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Masataka Kuribayashi, Takafumi Koide, Katsuyuki Kitajima, Makoto Kamisaki, Yasuhisa Morooka
  • Publication number: 20150248081
    Abstract: An image forming apparatus includes a latent image forming unit that forms a latent image on a photoreceptor, a developing unit that accommodates a developer containing flake shape toner particles and develops the latent image using the developer to form a toner image on a surface of the photoreceptor, a transfer unit, a bias applying unit, and a fixing unit, wherein the flake shape toner particles have an average major axis length of from 7 ?m to 20 ?m and an average thickness of from 1 ?m to 3 ?m and contain a flake shape metallic pigment.
    Type: Application
    Filed: July 16, 2014
    Publication date: September 3, 2015
    Inventors: Masataka KURIBAYASHI, Takafumi KOIDE, Katsuyuki KITAJIMA, Makoto KAMISAKI, Yasuhisa MOROOKA
  • Patent number: 9058001
    Abstract: An image forming apparatus includes a toner image forming unit that forms and continuously transfers a toner image based on image data onto a transported sheet from the front to the rear in a sheet transport direction as the sheet is transported, a fixing unit positioned downstream of the toner image forming unit in the transport direction and that fixes the transferred toner image onto the sheet, an image determining unit that determines whether the formed toner image is a scattering toner image that causes toner scattering during the transfer, and a speed controlling unit that controls, when it is determined that the toner image is a scattering toner image, a transport speed of the sheet and a transfer speed of the toner image to the sheet such that the speeds are slower than those when it is determined that the toner image is not a scattering toner image.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: June 16, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Narumasa Sato, Eiji Nakai, Katsuyuki Kitajima, Makoto Kamisaki, Toyofumi Inoue, Takafumi Koide, Masataka Kuribayashi, Yoshinari Ueno, Yoshifumi Eri
  • Patent number: 8722296
    Abstract: The invention provides a toner for electrostatic image development having a binder resin containing a amorphous polyester resin and a crystalline polyester resin, and a coloring agent, and satisfying the following relationship (1): SP(L)>SP(H)>SP(C)??(1) wherein SP(H) is the solubility parameter of a resin contained in an elution fraction F (0-10) from the beginning of elution of W1 until 10% of elution of W1 when W1 is the whole area of an elution curve on a gel permeation chromatograph measured for an acetone-soluble fraction; SP(L) is the solubility parameter of a resin contained in an elution fraction F (80-100) from 80% to 100% of the elution of W1; and SP(C) is the solubility parameter of the crystalline polyester resin.
    Type: Grant
    Filed: May 16, 2007
    Date of Patent: May 13, 2014
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Noriyuki Mizutani, Shinya Nakashima, Takeshi Iwanaga, Takafumi Koide, Susumu Yoshino
  • Publication number: 20140112677
    Abstract: An image forming apparatus includes a toner image forming unit that forms and continuously transfers a toner image based on image data onto a transported sheet from the front to the rear in a sheet transport direction as the sheet is transported, a fixing unit positioned downstream of the toner image forming unit in the transport direction and that fixes the transferred toner image onto the sheet, an image determining unit that determines whether the formed toner image is a scattering toner image that causes toner scattering during the transfer, and a speed controlling unit that controls, when it is determined that the toner image is a scattering toner image, a transport speed of the sheet and a transfer speed of the toner image to the sheet such that the speeds are slower than those when it is determined that the toner image is not a scattering toner image.
    Type: Application
    Filed: July 5, 2013
    Publication date: April 24, 2014
    Inventors: Narumasa SATO, Eiji Nakai, Katsuyuki Kitajima, Makoto Kamisaki, Toyofumi Inoue, Takafumi Koide, Masataka Kuribayashi, Yoshinari Ueno, Yoshifumi Eri
  • Patent number: 8216757
    Abstract: There is provided a toner for electrostatic charge image development, which includes a binder resin that includes a non-crystalline polyester resin and a crystalline polyester resin, and a colorant, wherein in a measurement of an acetone-soluble fraction of the toner by gel permeation chromatography, in which W1 represents the total area of an elution curve of the acetone-soluble fraction, F(0-10) represents an eluate corresponding to from the beginning of the elution to 10% elution of W1 over time, and F(80-100) represents an eluate corresponding to from 80% elution to 100% elution of W1 over time, the amount of an aliphatic unsaturated dicarboxylic acid-derived component of the resins contained in the eluate F(0-10) is in the range of from about 0 mol % to about 10 mol % relative to the total amount of the acid-derived components of the resins contained in the eluate F(0-10), and the amount of the aliphatic unsaturated dicarboxylic acid-derived component of the resins contained in the eluate F(80-100) is in
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: July 10, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Noriyuki Mizutani, Shinya Nakashima, Takeshi Iwanaga, Takafumi Koide, Susumu Yoshino
  • Patent number: 8090283
    Abstract: An image forming apparatus includes: an image bearing body on which surface an image is formed and borne; an image forming section that forms the image; a transfer device that transfers the formed image to a transferring body; a cleaning member that comes into contact with the surface of the image bearing body to scrape an adhesion substance after the image is transferred; a storage tank in which the removed adhesion substance is stored; a damming member that obstructs a region between the cleaning member and the storage tank to temporarily dam the adhesion substance moving from the cleaning member to the storage tank on the cleaning member side, the damming member including overlapped members having openings, the members including a movable member that is slidable with respect to other member; and a driving section that drives the movable member to change an overlapping amount between the openings.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: January 3, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Masataka Kuribayashi, Toyofumi Inoue, Yoshinari Ueno, Takafumi Koide, Naoki Ohnishi
  • Patent number: 7867683
    Abstract: A toner that when the complex elastic modulus measured at an angular frequency of 6.28 rad/sec., and a strain amount of 0.3% is 1×106 Pa or more and 1×108 Pa or less, the tangent loss is 0.5 or more and 1.8 or less.
    Type: Grant
    Filed: April 20, 2007
    Date of Patent: January 11, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Masanobu Ninomiya, Toyofumi Inoue, Masataka Kuribayashi, Masashi Ikeda, Takafumi Koide
  • Publication number: 20100232823
    Abstract: An image forming apparatus includes: an image bearing body on which surface an image is formed and borne; an image forming section that forms the image; a transfer device that transfers the formed image to a transferring body; a cleaning member that comes into contact with the surface of the image bearing body to scrape an adhesion substance after the image is transferred; a storage tank in which the removed adhesion substance is stored; a damming member that obstructs a region between the cleaning member and the storage tank to temporarily dam the adhesion substance moving from the cleaning member to the storage tank on the cleaning member side, the damming member including overlapped members having openings, the members including a movable member that is slidable with respect to other member; and a driving section that drives the movable member to change an overlapping amount between the openings.
    Type: Application
    Filed: July 13, 2009
    Publication date: September 16, 2010
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Masataka KURIBAYASHI, Toyofumi INOUE, Yoshinari UENO, Takafumi KOIDE, Naoki OHNISHI
  • Publication number: 20090155707
    Abstract: There is provided a toner for electrostatic charge image development, which includes a binder resin that includes a non-crystalline polyester resin and a crystalline polyester resin, and a colorant, wherein in a measurement of an acetone-soluble fraction of the toner by gel permeation chromatography, in which W1 represents the total area of an elution curve of the acetone-soluble fraction, F(0-10) represents an eluate corresponding to from the beginning of the elution to 10% elution of W1 over time, and F (80-100) represents an eluate corresponding to from 80% elution to 100% elution of W1 over time, the amount of an aliphatic unsaturated dicarboxylic acid-derived component of the resins contained in the eluate F(0-10) is in the range of from about 0 mol % to about 10 mol % relative to the total amount of the acid-derived components of the resins contained in the eluate F(0-10), and the amount of the aliphatic unsaturated dicarboxylic acid-derived component of the resins contained in the eluate F(80-100) is i
    Type: Application
    Filed: July 15, 2008
    Publication date: June 18, 2009
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Noriyuki MIZUTANI, Shinya NAKASHIMA, Takeshi IWANAGA, Takafumi KOIDE, Susumu YOSHINO
  • Publication number: 20080131802
    Abstract: The invention provides a toner for electrostatic image development having a binder resin containing a amorphous polyester resin and a crystalline polyester resin, and a coloring agent, and satisfying the following relationship (1): SP(L)>SP(H)>SP(C) ??(1) wherein SP(H) is the solubility parameter of a resin contained in an elution fraction F (0-10) from the beginning of elution of W1 until 10% of elution of W1 when W1 is the whole area of an elution curve on a gel permeation chromatograph measured for an acetone-soluble fraction; SP(L) is the solubility parameter of a resin contained in an elution fraction F (80-100) from 80% to 100% of the elution of W1; and SP(C) is the solubility parameter of the crystalline polyester resin.
    Type: Application
    Filed: May 16, 2007
    Publication date: June 5, 2008
    Applicant: FUJI XEROX CO., LTD
    Inventors: Noriyuki Mizutani, Shinya Nakashima, Takeshi Iwanaga, Takafumi Koide, Susumu Yoshino
  • Publication number: 20080085460
    Abstract: A toner that when the complex elastic modulus measured at an angular frequency of 6.28 rad/sec., and a strain amount of 0.3% is 1×106 Pa or more and 1×108 Pa or less, the tangent loss is 0.5 or more and 1.8 or less.
    Type: Application
    Filed: April 20, 2007
    Publication date: April 10, 2008
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Masanobu Ninomiya, Toyofumi Inoue, Masataka Kuribayashi, Masashi Ikeda, Takafumi Koide