Patents by Inventor Kunio Hasegawa

Kunio Hasegawa 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: 20120141177
    Abstract: A novel protective agent supply device is provided including a protective agent block including a metal salt of a fatty acid; a rotatable foamed roller having a foamed layer having open cells, that is in continuous contact with both the protective agent block and an outer peripheral surface of an image bearing member that bears a toner image, and that scrapes the protective agent block and supplies the scraped protective agent to the outer peripheral surface of the image bearing member during rotation of the foamed roller; and a pressing unit that presses the protective agent block against the foamed roller.
    Type: Application
    Filed: November 2, 2011
    Publication date: June 7, 2012
    Inventors: Taichi URAYAMA, Kunio Hasegawa
  • Publication number: 20120060753
    Abstract: An image bearing member-protecting agent including a fatty acid metal salt and boron nitride, wherein the image bearing member-protecting agent contains the fatty acid metal salt in an amount of 60% by mass to 87% by mass, and is formed by compression molding; or an image bearing member-protecting agent including a fatty acid metal salt and boron nitride, wherein the image bearing member-protecting agent contains the fatty acid metal salt in an amount of 88% by mass to 99% by mass, and is formed by melt molding.
    Type: Application
    Filed: September 13, 2011
    Publication date: March 15, 2012
    Applicant: Ricoh Company, Ltd.
    Inventors: Shinya Tanaka, Hiroshi Nakai, Kunio Hasegawa, Kohsuke Yamamoto, Taichi Urayama
  • Publication number: 20120063825
    Abstract: To provide a protecting agent supplying member, containing a core, and a foam layer formed on a periphery of the core, wherein the protecting agent supplying member is in the shape of a roller, and wherein the foam layer has concavities regularly arranged in a surface thereof.
    Type: Application
    Filed: August 26, 2011
    Publication date: March 15, 2012
    Applicant: Ricoh Company, Ltd.
    Inventors: Kunio Hasegawa, Hiroshi Nakai, Shinya Tanaka, Kohsuke Yamamoto, Taichi Urayama
  • Publication number: 20120063809
    Abstract: A protective agent for an image bearing member of an image forming apparatus. The protective agent is applied onto a surface of the image bearing member and includes a hydrophobic organic compound (A), an inorganic fine particle (B), and an inorganic lubricant (C).
    Type: Application
    Filed: November 16, 2011
    Publication date: March 15, 2012
    Inventors: Shinya Tanaka, Hiroshi Nakai, Masato Iio, Masahide Yamashita, Kunio Hasegawa, Naoyuki Ozaki
  • Publication number: 20120057912
    Abstract: A protecting agent-supplying device including: a rotation member configured to rotate in a certain direction; an image bearing member-protecting agent containing a fatty acid metal salt and an inorganic lubricant, and being in the form of a solid, wherein the agent is scraped off by the rotation of the rotation member, supplied to an image bearing member for protection thereof, and disposed to have a surface facing the rotation member, which surface has a width G in a direction along the certain direction, and wherein the position X (a center of the width G) is located upstream in the direction along the certain direction from the position Y (a line of intersection between the surface facing and a line extended from the rotational center of the rotation member perpendicular to the surface facing), and a distance d between these positions satisfies a formula 0<d?G/2.
    Type: Application
    Filed: September 7, 2011
    Publication date: March 8, 2012
    Applicant: Ricoh Company, Ltd.
    Inventors: Kunio Hasegawa, Hiroshi Nakai, Shinya Tanaka, Kohsuke Yamamoto, Taichi Urayama
  • Patent number: 8107872
    Abstract: An image forming apparatus including a charging unit configured to charge a surface of an image bearing member utilizing discharge generated by applying a voltage containing an alternating current component to a charging member disposed in contact with or close to the image bearing member, so that a latent electrostatic image is formed on the image bearing member; a developing unit configured to develop the latent electrostatic image formed on the image bearing member using a toner; a cleaning unit configured to clean the surface of the image bearing member using a blade; a protecting agent applying unit configured to rub and scrape a protecting agent by a brush roller and apply the protecting agent to the surface of the image bearing member; and a protecting agent charging member configured to charge the protecting agent, the member being disposed between the protecting agent applying unit and the charging unit.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: January 31, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Naoyuki Ozaki, Hiroshi Nakai, Masahide Yamashita, Masato Iio, Shinya Tanaka, Kunio Hasegawa
  • Patent number: 8081916
    Abstract: A protective agent for an image bearing member of an image forming apparatus. The protective agent is applied onto a surface of the image bearing member and includes a hydrophobic organic compound (A), an inorganic fine particle (B), and an inorganic lubricant (C).
    Type: Grant
    Filed: February 3, 2009
    Date of Patent: December 20, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinya Tanaka, Hiroshi Nakai, Masato Iio, Masahide Yamashita, Kunio Hasegawa, Naoyuki Ozaki
  • Patent number: 8081917
    Abstract: To provide an image-bearing member protecting agent used for forming a protective layer on a surface of an image bearing member, the agent including: a compressed powder body formed by pressurizing a powder containing at least a fatty acid metal salt (A) and an inorganic lubricant (B), wherein a ratio Db/Da of an average particle diameter Db of the inorganic lubricant (B) to an average particle diameter Da of the fatty acid metal salt (A) satisfies 0<Db/Da?0.40.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: December 20, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroshi Nakai, Masahide Yamashita, Masato Iio, Kunio Hasegawa, Shinya Tanaka
  • Patent number: 7991342
    Abstract: A protective material block including a metal soap, wherein the surface of the protective material block has an X-ray diffraction pattern wherein a ratio (P2/P1) of a maximum peak height (P2) on a surface separation of from 3.6 to 5.0 ? to a maximum peak height (P1) on a surface separation of from 11 to 16 ? not greater than 0.5.
    Type: Grant
    Filed: May 5, 2009
    Date of Patent: August 2, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Toshiyuki Kabata, Kumiko Hatakeyama, Kunio Hasegawa, Shinya Tanaka, Masahide Yamashita, Masato Iio, Hiroshi Nakai
  • Patent number: 7979017
    Abstract: An object of the present disclosure is to provide an image-bearing member protecting agent capable of preventing abrasion of an image-bearing member, filming on an image-bearing member, smearing of a charging member and leakage of toner. The image-bearing member protecting agent includes a fatty acid metal salt and boron nitride, wherein the boron nitride is crystals having an average diameter of 0.1 ?m to 1.0 ?m and forms secondary particles of a crystal aggregate having an average diameter of 3.0 ?m to 14.0 ?m.
    Type: Grant
    Filed: June 16, 2009
    Date of Patent: July 12, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinya Tanaka, Hiroshi Nakai, Kunio Hasegawa
  • Patent number: 7979016
    Abstract: An image forming apparatus including an image bearing member that bears a latent electrostatic image on the surface thereof, a charging device that uniformly charges the surface of the image bearing member, an irradiation device that irradiates the surface of the image bearing member to form the latent electrostatic image thereon, a development device that develops the latent electrostatic image on the surface of the image bearing member with toner to form a toner image thereon, a transfer device that transfers the toner image to a transfer body, a cleaning device including a cleaning blade that removes residual toner remaining on the surface of the image bearing member with the cleaning blade, a protective agent application device that applies a protective agent containing zinc stearate and zinc palmitate to the surface of the image bearing member, wherein the ratio of the zinc stearate and the zinc palmitate is from 66:34 to 40:60 by weight.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: July 12, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Kumiko Hatakeyama, Toshiyuki Kabata, Kunio Hasegawa, Masahide Yamashita
  • Patent number: 7941087
    Abstract: To provide an image-bearing member protecting agent used in an image forming method which includes applying or attaching the agent onto a surface of an image bearing member, the agent including: a fatty acid metal salt (A), and an inorganic lubricant (B), wherein the inorganic lubricant (B) has an average particle diameter of 0.1 ?m to 14 ?m.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: May 10, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinya Tanaka, Hiroshi Nakai, Masahide Yamashita, Masato Iio, Kunio Hasegawa
  • Publication number: 20110052286
    Abstract: An image bearing member-protecting agent which is supplied to an image bearing member for protecting the image bearing member, the image bearing member-protecting agent including a fatty acid metal salt and an inorganic lubricant, wherein the image bearing member-protecting agent is formed by compression molding of powder containing at least the fatty acid metal salt and the inorganic lubricant, and wherein the image bearing member-protecting agent satisfies the relation 1.0<A/B, where A denotes a density at end portions in the longitudinal direction of the image bearing member-protecting agent and B denotes a density at a central portion in the longitudinal direction of the image bearing member-protecting agent.
    Type: Application
    Filed: August 24, 2010
    Publication date: March 3, 2011
    Inventors: Taichi Urayama, Hiroshi Nakai, Kunio Hasegawa, Shinya Tanaka
  • Publication number: 20110038656
    Abstract: A protecting agent-supplying device which supplies, to an image bearing member, an image bearing member-protecting agent for protecting the image bearing member, wherein the image bearing member-protecting agent contains at least a fatty acid zinc salt and boron nitride, and wherein the protecting agent-supplying device supplies the image bearing member-protecting agent to the image bearing member so that the amount of zinc (Zn) present on a surface of the image bearing member satisfies the relation 0.4?Zn?2.5 (Atomic %) and the amount of boron (B) present on the surface of the image bearing member satisfies the relation 0.2?B?30.2 (Atomic %).
    Type: Application
    Filed: August 10, 2010
    Publication date: February 17, 2011
    Applicant: Ricoh Company, Ltd.
    Inventors: Kunio Hasegawa, Hiroshi Nakai, Shinya Tanaka, Taichi Urayama
  • Publication number: 20110008088
    Abstract: The image forming method includes applying a protective agent including a fatty acid metal salt to a surface of an image bearing member; forming an electrostatic latent image on the surface of the image bearing member; and developing the electrostatic latent image with a developer including toner and boron nitride to form a visual image. The image forming apparatus includes an image bearing member; a latent image forming device configured to form an electrostatic latent image on a surface of the image bearing member; developing device configured to develop the electrostatic latent image with a developer including toner and boron nitride to form a visual image on the surface of the image bearing member; and a protective agent applying device configured to apply a protective agent including a fatty acid metal salt to the surface of the image bearing member.
    Type: Application
    Filed: July 13, 2010
    Publication date: January 13, 2011
    Inventors: Hiroshi Nakai, Kunio Hasegawa, Shinya Tanaka, Taichi Urayama
  • Publication number: 20100310291
    Abstract: The present invention provides an image-bearing member protecting agent, which has a block shape and is used in an image forming process where the image-bearing member protecting agent is applied or attached to a surface of an image bearing member while being scraped off with a roll-shaped brush, the image-bearing member protecting agent including: a fatty acid metal salt, wherein the image-bearing member protecting agent includes a plurality of small blocks and has such an orientation that one or more of the small blocks are easily separated from other small blocks, and a plurality of oriented surfaces of the plurality of small blocks are arranged in a laminated state in a substantially same direction.
    Type: Application
    Filed: June 2, 2010
    Publication date: December 9, 2010
    Inventors: Shinya Tanaka, Hiroshi Nakai, Kunio Hasegawa, Taichi Urayama
  • Publication number: 20100239309
    Abstract: An image-bearing member protecting agent including a fatty acid metal salt, and an inorganic lubricant, wherein the image-bearing member protecting agent is a solid formed by compression molding a particulate or granulated raw material containing the fatty acid metal salt and the inorganic lubricant, and applied or adhered to a surface of an image bearing member, and wherein the image-bearing member protecting agent has a front surface which is a side of the image-bearing member protecting agent. to be used at the beginning, and a rear surface which is a side thereof to be left when most of the image-bearing member protecting agent is used up, and the image-bearing member protecting agent has a density decreasing from the front surface toward the rear surface.
    Type: Application
    Filed: March 11, 2010
    Publication date: September 23, 2010
    Inventors: Shinya Tanaka, Hiroshi Nakai, Kunio Hasegawa, Taichi Urayama
  • Publication number: 20100209143
    Abstract: An image forming apparatus includes an image bearing member configured to bear a toner image, a protective layer forming device configured to apply a protective agent to a surface of the image bearing member with a brush-shaped protective agent applicator, and a surface roughness maintainer configured to maintain a surface roughness Ry of a contact surface of the protective agent with the brush-shaped protective agent applicator at 500 ?m or less. The protective agent is a solid material in which a granular material comprising a fatty acid metallic salt is compressed.
    Type: Application
    Filed: February 17, 2010
    Publication date: August 19, 2010
    Inventors: Hiroshi Nakai, Kunio Hasegawa, Shinya Tanaka, Taichi Urayama
  • Publication number: 20100183972
    Abstract: An image-bearing member protecting agent including: a hydrophobic organic compound (A); an inorganic lubricant (B); and inorganic fine particles (C), wherein each of the inorganic fine particles (C) has a specific surface area of 2.0 m2/g to 6.5 m2/g.
    Type: Application
    Filed: January 8, 2010
    Publication date: July 22, 2010
    Inventors: Kunio Hasegawa, Hiroshi Nakai, Shinya Tanaka
  • Publication number: 20100054829
    Abstract: A protective layer forming device including an image-bearing member protecting agent which contains a fatty acid metal salt and an inorganic lubricant, a protecting agent supply member configured to apply a surface of the image bearing member with the image-bearing member protecting agent, and a leveling member configured to level off the image-bearing member protecting agent applied on the surface of the image bearing member, wherein the leveling member serves as a cleaning blade having a ridge part with an obtuse angle, which comes into contact with the surface of the image bearing member in a direction counter to the rotation of the image bearing member.
    Type: Application
    Filed: August 25, 2009
    Publication date: March 4, 2010
    Inventors: Masato Iio, Hiroshi Nakai, Masahide Yamashita, Shinya Tanaka, Naoyuki Ozaki, Kunio Hasegawa