Patents by Inventor Shinji OKUYAMA

Shinji OKUYAMA 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: 20190086842
    Abstract: An image forming apparatus includes image forming units, a transfer unit that transfers a superposed toner image including toner images formed by the image forming units onto a sheet, a fixing unit that fixes the superposed toner image onto the sheet, and a controller that performs control such that a toner image is formed while the amount of toner used per unit area by the second image forming unit when forming a line image is smaller than that when forming a solid image. The image forming units include a first image forming unit that forms a toner image that is transferred onto the transfer unit relatively earlier than the other toner images and a second image forming unit that forms a toner image that is transferred onto the transfer unit relatively later than the other toner images, the first and second image forming units using the same color toner.
    Type: Application
    Filed: April 5, 2018
    Publication date: March 21, 2019
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Miho IKEDA, Aya KAKISHIMA, Yasumitsu HARASHIMA, Shinji OKUYAMA
  • Publication number: 20160313667
    Abstract: Provided is a developing device, including a developer holding member that is rotatably disposed with opposing a latent image holding member which holds an electrostatic latent image, holds a developer including a toner and a carrier which include a conductive metallic pigment and are charged as normal polarity set in advance, is imparted with a potential of a same polarity as the normal polarity, and develops the electrostatic latent image with the toner, and an opposing member that is disposed with opposing the developer holding member at a position different from a position of the latent image holding member, and is imparted with a potential having a same polarity as the normal polarity, and has an absolute value greater than an absolute value of the potential of the developer holding member.
    Type: Application
    Filed: October 28, 2015
    Publication date: October 27, 2016
    Inventors: Tomoyuki YOSHII, Yasuaki WATANABE, Jun ABE, Toshihiro KANEMATSU, Takashi OCHI, Kenta URAYAMA, Shinji OKUYAMA, Fumiyuki HONDA
  • Patent number: 9454104
    Abstract: A developing device includes a developing sleeve and a regulation portion. The developing sleeve includes a magnetism generating portion to which magnetic poles are attached. The developing sleeve holds a developer on an outer circumferential surface. The regulation portion includes a magnetic plate. A first segment connecting a peak position of the magnetic pole disposed at a position facing the magnetic plate and an axial center of the developing sleeve has an angle, with respect to a second segment connecting the magnetic plate and the axial center, equal to or less than 7 degrees on a downstream side in a rotation direction of the developing sleeve and equal to or less than 6 degrees on an upstream side in the rotation direction. An angle of a half value width of the magnetic pole is equal to or greater than 41 degrees to equal to or less than 52 degrees.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: September 27, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kenta Urayama, Yasuaki Watanabe, Jun Abe, Tomoyuki Yoshii, Takashi Ochi, Shinji Okuyama, Fumiyuki Honda, Shiho Matsuda
  • Publication number: 20160266519
    Abstract: A developing device includes a container in which developer is contained; and a developer carrier disposed in the container, the developer carrier including a magnet member having magnetic poles, and a rotation member that covers an outer circumference of the magnet member and is rotatably supported, the developer carrier developing a latent image formed on an image carrier into a visible image with the developer held on a surface of the rotation member as an effect of the magnet member. The rotation member has projections and recesses formed in the surface, which satisfy y?1.875×x+11.25, where y is an average depth of the projections and recesses when a lowest position of the recesses is assumed to be 0 and a highest position of the projections is assumed to be 100, and x is a ten-point average roughness of the projections and recesses.
    Type: Application
    Filed: September 10, 2015
    Publication date: September 15, 2016
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shinji OKUYAMA, Yasuaki WATANABE, Jun ABE, Tomoyuki YOSHII, Toshihiro KANEMATSU, Takashi OCHI, Kenta URAYAMA, Fumiyuki HONDA
  • Patent number: 9417582
    Abstract: An image forming apparatus includes an image forming section and a controller. The image forming section transfers a toner image to a transfer target and includes plural developing units. The plural developing units include a first developing unit and at least one second developing unit. The plural developing units each include an image holding body and a developing roller. The image holding body has an outer circumferential surface and is rotated. The controller controls the image forming section so that, when a low-area-coverage portion and a high-area-coverage portion are disposed adjacent to each other and are formed by the first developing unit, a correction toner image is superposed on a boundary portion, where the low-area-coverage portion and the high-area-coverage portion are adjacent to each other, by the at least one second developing unit.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: August 16, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kenta Urayama, Yasuaki Watanabe, Jun Abe, Tomoyuki Yoshii, Toshihiro Kanematsu, Takashi Ochi, Shinji Okuyama, Fumiyuki Honda
  • Patent number: 9383683
    Abstract: A transport mechanism includes: a container that stores a specific developer; a transport body that transports the developer in an axial direction of a shaft about which the transport body rotates in the container while stirring the developer; a bearing that supports the transport body such that the transport body is rotatable about the shaft; and a restricting portion that has a substantially annular shape and a maximum magnetic force of about 20 mT or greater and about 50 mT or smaller and restricts the transportation of the developer past the restricting portion by surrounding the shaft, the restricting portion being provided nearer to a side on which the transport body transports the developer than the bearing in the axial direction of the shaft.
    Type: Grant
    Filed: January 30, 2015
    Date of Patent: July 5, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Fumiyuki Honda, Takashi Ochi, Yasuaki Watanabe, Tomoyuki Yoshii, Jun Abe, Toshihiro Kanematsu, Kenta Urayama, Shinji Okuyama
  • Patent number: 9377719
    Abstract: A developing device includes a developer container; a developer carrier; a first transport member having a rotation shaft and a transport blade; a second transport member having a rotation shaft and a transport blade; a partition member; a guide member; a first inflow portion; a second inflow portion; and a movement portion. The rotation shaft of the first transport member is located within a projection area of the developer carrier projected from above. A second imaginary tangent line extending vertically and touching an outer end of the transport blade of the first transport member is farther from the image carrier than a first imaginary tangent line extending vertically and touching an outer surface of the developer carrier. A first distance between the first and second imaginary tangent lines is smaller than a second distance between a rotation center of the image carrier and an inner surface of the developer container.
    Type: Grant
    Filed: September 24, 2014
    Date of Patent: June 28, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shigeru Inaba, Shigemi Murata, Yoshitaka Nakajima, Shinji Okuyama
  • Publication number: 20160085180
    Abstract: A transport mechanism includes: a container that stores a specific developer; a transport body that transports the developer in an axial direction of a shaft about which the transport body rotates in the container while stirring the developer; a bearing that supports the transport body such that the transport body is rotatable about the shaft; and a restricting portion that has a substantially annular shape and a maximum magnetic force of about 20 mT or greater and about 50 mT or smaller and restricts the transportation of the developer past the restricting portion by surrounding the shaft, the restricting portion being provided nearer to a side on which the transport body transports the developer than the bearing in the axial direction of the shaft.
    Type: Application
    Filed: January 30, 2015
    Publication date: March 24, 2016
    Inventors: Fumiyuki HONDA, Takashi OCHI, Yasuaki WATANABE, Tomoyuki YOSHII, Jun ABE, Toshihiro KANEMATSU, Kenta URAYAMA, Shinji OKUYAMA
  • Patent number: 9244376
    Abstract: Provided is a developing device including a storage container that stores a developer, a rotating body that supplies the developer to an image holding member in a supply region by being rotated with holding the developer, an inflow portion that is provided with an inflow port placed on a downstream side of the supply region in a rotation direction of the rotating body, and flows air into the storage container, and an outflow portion that is provided with an outflow port and emits air in the storage container from the outflow port, wherein the outflow port and the inflow port are placed to be adjacent to each other.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: January 26, 2016
    Assignee: FUJI XEROX CO., LTD
    Inventors: Shinichi Kuramoto, Yasutomo Ishii, Ryota Tomishi, Shinji Okuyama
  • Patent number: 9195168
    Abstract: A developing device includes a developer carrier that has a cylindrical shape and that rotates while carrying developer to supply the developer to an image carrier on which an electrostatic latent image is formed, a container that contains the developer carrier, and a discharge-path forming member that is provided along an outer peripheral surface of the developer carrier, that covers a top portion of a path along which the outer peripheral surface moves, the top portion being located at an uppermost position of the path, and that forms a discharge path, through which air is discharged from inside of the container to outside of the container, between the discharge-path forming member and an inner wall surface of the container, the discharge path having an outlet located closer to the developer carrier than the top portion.
    Type: Grant
    Filed: July 9, 2014
    Date of Patent: November 24, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yasutomo Ishii, Shinichi Kuramoto, Hiroaki Okuma, Ryota Tomishi, Shinji Okuyama, Kiyohito Horii, Daisuke Nakai, Ryo Fukuno, Toshiaki Suzuki
  • Publication number: 20150277292
    Abstract: A developing device includes a developer container; a developer carrier; a first transport member having a rotation shaft and a transport blade; a second transport member having a rotation shaft and a transport blade; a partition member; a guide member; a first inflow portion; a second inflow portion; and a movement portion. The rotation shaft of the first transport member is located within a projection area of the developer carrier projected from above. A second imaginary tangent line extending vertically and touching an outer end of the transport blade of the first transport member is farther from the image carrier than a first imaginary tangent line extending vertically and touching an outer surface of the developer carrier. A first distance between the first and second imaginary tangent lines is smaller than a second distance between a rotation center of the image carrier and an inner surface of the developer container.
    Type: Application
    Filed: September 24, 2014
    Publication date: October 1, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shigeru INABA, Shigemi MURATA, Yoshitaka NAKAJIMA, Shinji OKUYAMA
  • Publication number: 20150268583
    Abstract: A developing device includes: a first transport member that transports developer in a developer container; a second transport member that transports the developer in a direction opposite to a direction of transport by the first transport member; an inflow portion provided at a downstream end in the direction of transport by the second transport member and on an outer side with respect to an end of a developer carrying body, the inflow portion allowing the developer to flow from a second housing into a first housing; a high-speed transport portion provided in a range corresponding to the inflow portion and that transports the developer at a higher speed; and a regulating member provided at a position corresponding to a downstream end of the high-speed transport portion in the direction of transport by the first transport member and that regulates a height of a mound of developer in the first housing.
    Type: Application
    Filed: December 30, 2014
    Publication date: September 24, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shigemi MURATA, Shigeru INABA, Shinji OKUYAMA, Norihiro TAMAZAWA
  • Patent number: 9141032
    Abstract: A developing device includes: a first transport member that transports developer in a developer container; a second transport member that transports the developer in a direction opposite to a direction of transport by the first transport member; an inflow portion provided at a downstream end in the direction of transport by the second transport member and on an outer side with respect to an end of a developer carrying body, the inflow portion allowing the developer to flow from a second housing into a first housing; a high-speed transport portion provided in a range corresponding to the inflow portion and that transports the developer at a higher speed; and a regulating member provided at a position corresponding to a downstream end of the high-speed transport portion in the direction of transport by the first transport member and that regulates a height of a mound of developer in the first housing.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: September 22, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Shigemi Murata, Shigeru Inaba, Shinji Okuyama, Norihiro Tamazawa
  • Publication number: 20150093139
    Abstract: Provided is a developing device including a storage container that stores a developer, a rotating body that supplies the developer to an image holding member in a supply region by being rotated with holding the developer, an inflow portion that is provided with an inflow port placed on a downstream side of the supply region in a rotation direction of the rotating body, and flows air into the storage container, and an outflow portion that is provided with an outflow port and emits air in the storage container from the outflow port, wherein the outflow port and the inflow port are placed to be adjacent to each other.
    Type: Application
    Filed: May 19, 2014
    Publication date: April 2, 2015
    Applicant: FUJI XEROX CO., LTD
    Inventors: Shinichi KURAMOTO, Yasutomo ISHII, Ryota TOMISHI, Shinji OKUYAMA
  • Publication number: 20150016848
    Abstract: A developing device includes a developer carrier that has a cylindrical shape and that rotates while carrying developer to supply the developer to an image carrier on which an electrostatic latent image is formed, a container that contains the developer carrier, and a discharge-path forming member that is provided along an outer peripheral surface of the developer carrier, that covers a top portion of a path along which the outer peripheral surface moves, the top portion being located at an uppermost position of the path, and that forms a discharge path, through which air is discharged from inside of the container to outside of the container, between the discharge-path forming member and an inner wall surface of the container, the discharge path having an outlet located closer to the developer carrier than the top portion.
    Type: Application
    Filed: July 9, 2014
    Publication date: January 15, 2015
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yasutomo ISHII, Shinichi KURAMOTO, Hiroaki OKUMA, Ryota TOMISHI, Shinji OKUYAMA, Kiyohito HORII, Daisuke NAKAI, Ryo FUKUNO, Toshiaki SUZUKI
  • Publication number: 20110142524
    Abstract: Provided is a transportation roller, a transportation unit, a printing apparatus, and a method of manufacturing a transportation roller capable of reducing warpage with the elapsing of time. A transportation roller includes: a roller body which is formed in a cylindrical shape by subjecting a metal sheet to a pressing process and allowing a pair of end portions thereof to face each other, and has a joint formed between the pair of end portions, wherein in a sectional shape perpendicular to the axis of the roller body, a thickness of a joint facing portion facing the joint with the axis interposed therebetween is larger than a thickness of a joint portion provided with the joint, and a thickness of the roller body connecting the joint facing portion and the joint portion is gradually changed as it goes from the joint facing portion to the joint portion.
    Type: Application
    Filed: December 8, 2010
    Publication date: June 16, 2011
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Koichi SAITO, Toru SHINTATE, Shinji OKUYAMA, Kenji OZAWA