Patents by Inventor Toshiyuki Fujita

Toshiyuki Fujita 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: 8557486
    Abstract: An organic photoreceptor having a photosensitive layer, an electric conductive support, and a protective layer is disclosed, in which the protective layer comprises a composition produced by reacting tin oxide particles an acryloyl or methacryloyl group on their surface with a compound having an acryloyl or methacryloyl group. A production method of the same, an image forming apparatus and a process cartridge using the same are also disclosed.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: October 15, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Takeshi Ishida, Hirofumi Hayata, Masahiko Kurachi, Toshiyuki Fujita, Seisuke Maeda, Seijiro Takahashi
  • Patent number: 8481233
    Abstract: Disclosed is an organic photoreceptor comprising on an electrically conductive support a light-sensitive layer and a surface layer, wherein the surface layer comprises a resin formed by curing a photocurable compound containing at least one polar group and at least one photocurable-functional group and a particulate metal oxide having a water absorption of 0.1 to 10%. There are also disclosed an image forming apparatus and a process cartridge.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: July 9, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Toshiyuki Fujita, Hirofumi Hayata, Masahiko Kurachi, Kunihiro Ogura
  • Publication number: 20130157182
    Abstract: Disclosed is an electrophotographic photoreceptor including a conductive supporting body, a photosensitive Layer and a protective layer. In the electrophotographic photoreceptor, at least the photosensitive layer and the protective layer are sequentially layered, on the conductive supporting body, and the protective layer includes P-type semiconductor particles.
    Type: Application
    Filed: December 14, 2012
    Publication date: June 20, 2013
    Inventors: Toshiyuki FUJITA, Hirofumi HAYATA
  • Patent number: 8404417
    Abstract: In the present invention, disclosed is an organic photoreceptor comprising a conductive support and provided thereon, a photosensitive layer and a protective layer provided on the photosensitive layer, the protective layer formed with alumina particles each comprising a reactive organic group. Also provided is an organic photoreceptor with which electrophotographic images having high durability together with high image quality can be obtained by improving a wear property of the organic photoreceptor up to the same level as that of an amorphous silicon photoreceptor, as well as by improving image flow and image blur which are easy to be generated at high temperature and high humidity.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: March 26, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Toshiyuki Fujita, Hirofumi Hayata, Takeshi Ishida, Masahiko Kurachi, Seisuke Maeda, Seijiro Takahashi
  • Patent number: 8354212
    Abstract: Disclosed is an electrophotogaphic photoreceptor that causes little or no abrasion-derived uneven image density and does not cause scratches and image defects attributable to the occurrence of scratches even after a large volume, for example, exceeding 1,000,000 sheets of printing, and that does not cause image blurring even after printing in an environment of a high-temperature and a high-relative humidity (RH) respectively exceeding 30° C. and 80%.
    Type: Grant
    Filed: September 17, 2009
    Date of Patent: January 15, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hirofumi Hayata, Takeshi Ishida, Masahiko Kurachi, Toshiyuki Fujita, Seisuke Maeda, Seijiro Takahashi
  • Publication number: 20120314465
    Abstract: There is provided a contactless electricity-supplying device that can safely and efficiently supply power to a load.
    Type: Application
    Filed: November 12, 2010
    Publication date: December 13, 2012
    Inventors: Ryoji Matsui, Toshiyuki Fujita, Hironori Kambara, Masayoshi Ozaki
  • Publication number: 20120305444
    Abstract: The object of this invention is to protect a solar panel with attaching a protection module to four corners of a solar panel. Another object is for preventing the protection module from falling off when a solar panel is lifted up or tilted. Further object is that protection modules prevent collapse of cargo piles when solar panels are accumulated. The protection module comprises perpendicular sidewalls 41 and stage-like insertion member 44. The sidewalls 41 cover two corner sides of the stacked solar panels. The insertion member 44 and the sidewalls 41 are molded integrally in such manner to connect two sides of the insertion member 44 to the inner surface 42 of the sidewalls 41. The insertion member 44 is inserted between the stacked solar panels. A bank 45 is formed on the upper surface of the insertion member 44. The bank 45 has hooking slopes 46 for holding the lower edge 34 of the frame of the solar panel by hooking on it. A terrace 47 is formed on the underside of the insertion member 44.
    Type: Application
    Filed: February 3, 2011
    Publication date: December 6, 2012
    Inventors: Toshiyuki Fujita, Yoshiaki Miyata, Katsuyuki Naitoh, Eiji Tamatani
  • Patent number: 8318396
    Abstract: An organic photoreceptor is disclosed, comprising, on an electrically conductive support, a photosensitive layer and a protective layer containing metal oxide particles produced by a plasma method, and the protective layer being formed by curing a composition containing the metal oxide particles and a curable compound. There is also disclosed a preparation method of the organic photoreceptor.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: November 27, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Toshiyuki Fujita, Hirofumi Hayata, Takeshi Ishida, Masahiko Kurachi, Seisuke Maeda, Seijiro Takahashi
  • Patent number: 8298735
    Abstract: Disclosed is an organic photoreceptor, which is composed of a photosensitive layer and a protective layer, provided on an electric conductive support, and the protective layer contains a composition obtained by hardening reaction of ?-alumina particles treated with a compound having a reactive functional group with a hardenable compound. A manufacturing method thereof is also disclosed.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: October 30, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Masahiko Kurachi, Takeshi Ishida, Toshiyuki Fujita, Seisuke Maeda, Seijiro Takahashi
  • Patent number: 8202675
    Abstract: An electrophotographic photoreceptor is provided with a conductive support; a photosensitive layer provided on the conductive support; and a surface layer provided on the photosensitive layer, wherein the surface layer contains a reaction product of surface-treated inorganic fine particles which are applied with a surface treatment with a metal oxide and a surface treatment with a compound having a polymerizable functional group.
    Type: Grant
    Filed: February 16, 2010
    Date of Patent: June 19, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Masahiko Kurachi, Hirofumi Hayata, Takeshi Ishida, Toshiyuki Fujita, Seisuke Maeda, Seijiro Takahashi
  • Publication number: 20120105763
    Abstract: Concave marks indicative of an orientation of a circuit board are formed on the circuit board, convex indices to be engaged with the marks are formed in a position in which the circuit is to be attached. An operator confirms the orientation of the circuit board easily and accurately by visually recognizing the marks and touching the marks with a finger. Moreover, the operator positions the circuit board by engaging the marks with the indices.
    Type: Application
    Filed: April 16, 2010
    Publication date: May 3, 2012
    Inventors: Hideto Takeuchi, Toshiyuki Fujita, Tatsuo Sugahara, Yuuki Kawamura, Mamoru Yahata, Hiroshi Takahashi, Keita Ito, Kenzo Toshiyuki, Kenichiro Ito, Kazuki Nakamichi, Tomoo Sasaki, Kenta Moribe
  • Patent number: 8163456
    Abstract: An image forming method and image forming apparatus based on the application thereof wherein comet-like deposits do not appear on the surface of the photoreceptor even after prolonged use of small-diameter toner, and there is no dropout or damage on the photoreceptor surface in the image forming process using an intermediate transfer member. This image forming method contains a process wherein the toner developed on an electrophotographic photoreceptor is transferred onto an intermediate transfer member, and the toner contains at least a metallic oxide and metallic soap added as external additive agents, and the protective layer contains a resin component obtained by reaction of at least a curable compound, and alumina particles.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: April 24, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Hirofumi Hayata, Masahiko Kurachi, Toshiyuki Fujita
  • Publication number: 20120087122
    Abstract: There are provided a light source device and a display device which do not generate a wrinkle on an optical sheet even if the optical sheet is held on an LED substrate. A reflection sheet is disposed between each of head portions possessed by a rivet, a positioning rivet and a support rivet and one surface of an LED substrate where an LED is mounted, and a gap in a direction of a sheet thickness is provided between the head portion of each of the rivets and the reflection sheet. In the case in which a sudden thermal change is caused, therefore, the reflection sheet expands or contracts between the head portion of each of the rivets and the reflection sheet so that the wrinkle can be prevented from being generated over the reflection sheet.
    Type: Application
    Filed: May 21, 2010
    Publication date: April 12, 2012
    Inventors: Hideto Takeuchi, Toshiyuki Fujita, Tatsuo Sugahara, Yuuki Kawamura, Mamoru Yahata, Hiroshi Takahashi, Keita Ito, Kenzo Toshiyuki, Kenichiro Ito, Kazuki Nakamichi, Tomoo Sasaki, Kenta Moribe
  • Publication number: 20120087126
    Abstract: There are provided a plurality of circuit boards having a light-emitting element mounted on a one surface and disposed apart from each other with a planar direction aligned, a support body positioned on the other surface side of the circuit boards for supporting the circuit boards, and a connector for electrically connecting the adjacent circuit boards to each other. Inserting holes for inserting a fixture for fixing the circuit boards to the support body are formed on the circuit boards apart from each other, and a dimension of the inserting hole is smaller than that of the other inserting hole.
    Type: Application
    Filed: April 16, 2010
    Publication date: April 12, 2012
    Inventors: Hideto Takeuchi, Toshiyuki Fujita, Tatsuo Sugahara, Yuuki Kawamura, Mamoru Yahata, Hiroshi Takahashi, Keita Ito, Kenzo Toshiyuki, Kenichiro Ito, Kazuki Nakamichi, Tomoo Sasaki, Kenta Moribe
  • Publication number: 20120063133
    Abstract: A through hole penetrating in a vertical direction and a slot which is separated from the through hole in the direction along the sheet surface and is long in a separating direction are provided on a light reflection sheet supported on a support body supporting a light source for reflecting light emitted from the light source, and there are provided a first shaft member fitted in the through hole for setting a position of the light reflection sheet with respect to the support body, and a second shaft member fitted in the slot to enable a relative movement in a longitudinal direction of the slot for setting the position of the light reflection sheet with respect to the support body.
    Type: Application
    Filed: April 16, 2010
    Publication date: March 15, 2012
    Inventors: Hideto Takeuchi, Toshiyuki Fujita, Tatsuo Sugahara, Yuuki Kawamura, Mamoru Yahata, Hiroshi Takahashi, Keita Ito, Kenzo Toshiyuki, Kenichiro Ito, Kazuki Nakamichi, Tomoo Sasaki, Kenta Moribe
  • Publication number: 20120034541
    Abstract: Provided is a fuel cell stack having reduced thickness and weight and an improved output density. The fuel cell stack according to the present invention includes two or more stacked fuel cell layers, and is characterized in that at least one of the fuel cell layers is formed by arranging two or more composite unit cells in an identical plane with a gap provided therebetween, that the composite unit cell includes a plurality of unit cells and a fuel supply portion for supplying fuel to anode electrodes of the unit cells, and that the anode electrodes of the plurality of unit cells are arranged to face the fuel supply portion.
    Type: Application
    Filed: March 31, 2010
    Publication date: February 9, 2012
    Inventors: Masashi Muraoka, Toshiyuki Fujita, Tomohisa Yoshie, Hironori Kambara
  • Publication number: 20110318681
    Abstract: An electrophotographic photoreceptor is disclosed, comprising, on an electrically conductive substrate, a photosensitive layer and a surface layer provided sequentially in that order, in which the surface layer is a layer formed by polymerizing a polymerizable compound (I) containing seven to ten functional groups and exhibiting a reactive group equivalent of not more than 140 and not less than 100.
    Type: Application
    Filed: June 17, 2011
    Publication date: December 29, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Morio OSADA, Takeshi ISHIDA, Toshiyuki FUJITA, Seisuke MAEDA
  • Patent number: 8084172
    Abstract: An organic photoreceptor comprising a photosensitive layer on a conductive substrate and a protective layer on the photosensitive layer, wherein the protective layer is a surface layer prepared via reaction curing of a compound having a radical polymerizable, curable functional group using a polymerization initiators and the content of the polymerization initiator detected in the photosensitive layer is at most 5,000 ppm.
    Type: Grant
    Filed: May 1, 2009
    Date of Patent: December 27, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Masahiko Kurachi, Hirofumi Hayata, Toshiyuki Fujita
  • Patent number: 8071266
    Abstract: An objective is to provide a high releasing electrophotographic photoreceptor exhibiting lubricity and mechanical strength. The photoreceptor possessing a photosensitive layer on a conductive support, wherein an outermost layer of the photoreceptor comprises a fluorine resin represented by the following formula. wherein each of X, Y and Z represents a hydrogen atom, a halogen atom, a halogen-substituted alkyl group or a halogen-substituted alkoxy group; at least one of X, Y and Z represents a fluorine atom; each of R4, R5, R6 and R7 represents a hydrogen atom, a halogen atom or a halogen-substituted alkyl group; each of R1, R2, and R3 represents a hydrogen atom, a halogen atom or a halogen-substituted alkyl group; at least one of R1, R2, and R3 represents a fluorine atom; n1 represents an integer of 1-8000; and n2 represents an integer of 0-4000.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: December 6, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kunihiro Ogura, Hirofumi Hayata, Masahiko Kurachi, Toshiyuki Fujita
  • Publication number: 20110217651
    Abstract: Disclosed is an image formation method comprising the steps of charging an organic photoreceptor by a charging device, the organic photoreceptor comprising a substrate and provided thereon, a photoreceptive layer and a protective layer in that order; imagewise exposing the charged organic photoreceptor by an exposure device to form an electrostatic latent image; developing the electrostatic latent image by a developing device to form a toner image, the developing device comprising a developer containing a toner; transferring the toner image to a recording medium by a transfer device; and then removing, by a cleaning device, a toner remaining on the organic photoreceptor from the organic photoreceptor, wherein the protective layer is formed by polymerization of a polymerizable composition containing a polymerizable compound with a polymerizable functional group, and wherein the toner contains an antioxidant.
    Type: Application
    Filed: February 28, 2011
    Publication date: September 8, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Hirofumi HAYATA, Toshiyuki FUJITA