Patents by Inventor Kohsuke Yamamoto

Kohsuke Yamamoto 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: 20100232831
    Abstract: An electrophotographic photoreceptor including a conductive substrate, a photosensitive layer, and a surface layer, which satisfies the following inequations: 0.005<WRa(LMH)<0.03??(i) 0.010<WRa(LHH)<0.03??(ii) 0.005<WRa(LML)<0.20??(iii) WRa(LLH)>WRa(LMH)??(iv) WRa(LLH)>WRa(LHH)??(v) wherein WRa (?m) represents a center-line average roughness of frequency components LHH, LHL, LMH, LML, LLH, and LLL that are obtained by subjecting a one-dimensional data array of a surface profile of the electrophotographic photoreceptor to wavelet transformation multiresolution analysis so as to be separated into 6 frequency components; thinning a one-dimensional data array of the lowest frequency component so that the number of data array is reduced to 1/40; and subjecting the thinned one-dimensional data array to wavelet transformation multiresolution analysis so as to be separated into the 6 frequency components LHH, LHL, LMH, LML, LLH, and LLL.
    Type: Application
    Filed: March 12, 2010
    Publication date: September 16, 2010
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yukio Fujiwara, Hidetoshi Kami, Kazuhiro Egawa, Shinji Nohsho, Mayumi Yoshihara, Mihoko Matsumoto, Kohsuke Yamamoto
  • Publication number: 20100220818
    Abstract: A digital broadcast reception device mounted on a mobile body includes a position information detection unit for detecting the position of the digital broadcast reception device, a database holding unit for storing reception quality of the digital broadcast in advance, a switching point calculation unit for obtaining a hierarchy switching point, and output switching unit for performing a hierarchy switching. The digital broadcast reception device acquires the hierarchy switching frequency generated during movement in advance based on reception quality information previously stored in the database holding unit, and controls the hierarchy switching so as to reduce the switching frequency, thereby reducing disconnections of video and audio.
    Type: Application
    Filed: May 17, 2007
    Publication date: September 2, 2010
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kohsuke Yamamoto, Keiichi Toiyama
  • Publication number: 20100191533
    Abstract: The text information presentation device calculates an optimum readout speed on the basis of the content of text information being input, its arriving time, and its previous arriving time; speech-synthesizes text information being input, at the readout speed calculated; and outputs it as an audio signal, or alternatively controls the speed at which a video signal is output according to an output state of the speech synthesizing unit.
    Type: Application
    Filed: July 15, 2008
    Publication date: July 29, 2010
    Inventors: Keiichi Toiyama, Mitsuteru Kataoka, Kohsuke Yamamoto
  • Patent number: 7725069
    Abstract: An image forming apparatus includes an image carrier configured to carry an image on a surface thereof, a cleaning unit including a cleaning blade and configured to remove residual toner remaining on the surface of the image carrier with the cleaning blade, and an application unit including a brush roller having a modified cross-section fiber and configured to use the brush roller to scrape molded lubricant into scraped lubricant and apply the scraped lubricant to the image carrier. A process cartridge is provided to the image forming apparatus and integrally includes the image carrier, the cleaning unit, the application unit, and at least one of a charging unit and a developing unit in a single unit.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: May 25, 2010
    Assignee: Ricoh Company Limited
    Inventors: Shinichi Kawahara, Kohsuke Yamamoto, Takehide Mizutani
  • Publication number: 20100040393
    Abstract: An image forming apparatus includes multiple image forming units disposed adjacent to and horizontally aligned with each other to form respective single non-black color images, a first transfer member to sequentially transfer and overlay the respective single non-black color images thereon for forming a composite color image, a black image forming unit disposed separately from the multiple image forming units including a black image carrier and a black image developing unit, a second transfer member to transfer the black image from the black image forming unit onto a recording medium, a first cleaning unit to clean the surface of the black image carrier, and a second cleaning unit to clean the surface of the second transfer member. The black toner removed from the surface of the black image carrier is collected to the black image developing unit.
    Type: Application
    Filed: August 17, 2009
    Publication date: February 18, 2010
    Inventors: Shinichi Kawahara, Masumi Sato, Nobuyuki Koinuma, Kazuhisa Sudo, Tokuya Ojimi, Kazuhiko Yuki, Kohsuke Yamamoto, Takehide Mizutani, Masaki Sukesako, Ryuji Yoshida
  • Publication number: 20090311616
    Abstract: An electrophotographic photoconductor including an electroconductive support and a photoconductive layer provided thereon, wherein the photoconductive layer includes a charge generating material, an electron transporting material and a hole transporting material, the electron transporting material being a diphenoquinone compound represented by formula (1) described herein, the hole transporting material being a compound represented by formula (2) described herein.
    Type: Application
    Filed: June 9, 2009
    Publication date: December 17, 2009
    Inventors: Keisuke SHIMOYAMA, Eiji KURIMOTO, Takaaki IKEGAMI, Kohsuke YAMAMOTO, Tadayoshi UCHIDA, Takumi SHINOHARA, Hajime SUZUKI
  • Publication number: 20090136260
    Abstract: An electrophotographic photoconductor including a conductive support and a photosensitive layer, wherein the photosensitive layer contains a charge generation agent, a charge transport agent and a binder resin, and wherein the charge generation agent contains an asymmetric disazo pigment represented by General Formula (I), the charge transport agent contains a triphenylamine compound represented General Formula (IX), and the mass ratio of the charge transport agent to the binder resin is 0.3 to 2.0, where R1 and R2 each represent a substituted or unsubstituted alkyl group, alkoxy group, aryl group or heterocyclic group, provided that R1 and R2 are different, where R3 to R5 each represent hydrogen, a halogen atom, an alkyl group having 1 to 6 carbon atoms, which may have a substituent, an alkoxy group having 1 to 6 carbon atoms, which may have a substituent, or a substituted or unsubstituted aryl group having 6 to 12 carbon atoms.
    Type: Application
    Filed: November 25, 2008
    Publication date: May 28, 2009
    Applicants: RICOH COMPANY, LTD,, YAMANASHI ELECTRONICS CO., LTD.
    Inventors: Takaaki IKEGAMI, Takeshi Takada, Toshihiko Koizumi, Hideki Nakamura, Hajime Suzuki, Keisuke Shimoyama, Kohsuke Yamamoto, Eiji Kurimoto
  • Publication number: 20090044915
    Abstract: A sheet bonding machine bonds together a first sheet and a second sheet including an adhesion layer formed on one side thereof, covered with a release paper, includes a transport unit to transport the first sheet unidirectionally, a feeder to feed the second sheet obliquely toward the first sheet, a separation unit, a reel, an adhesion point, and a tensioner. The release paper is removed from the second sheet by the separation unit located upstream from the contact portion, and reeled by the reel. The second sheet adheres to the first sheet via the adhesion layer 91b at the adhesion point located downstream from the separation unit. The tensioner is located upstream from the separation unit and keeps the second sheet taut.
    Type: Application
    Filed: August 15, 2008
    Publication date: February 19, 2009
    Inventors: Takehide Mizutani, Kazuhisa Sudo, Mikio Ishibashi, Reki Nakamura, Megumi Arai, Yukiko Iwasaki, Kazuhiko Yuki, Nobuyuki Koinuma, Ryuji Yoshida, Kohsuke Yamamoto
  • Publication number: 20090000445
    Abstract: A sheet cutter cuts an adhesion sheet and includes a pair of blades including a first blade including a blade edge and a second blade opposing the first blade and including a blade edge. The pair of blades cuts a border of the adhesion sheet. The adhesion sheet is formed by adhering a first sheet, at least a part of which is transparent and bears a mirror image, to a non-transparent second sheet including an adhesive layer, to oppose the mirror image on the first sheet against the adhesive layer of the second sheet.
    Type: Application
    Filed: June 11, 2008
    Publication date: January 1, 2009
    Inventors: Kohsuke Yamamoto, Kazuhisa Sudo, Reki Nakamura, Takehide Mizutani, Mikio Ishibashi, Yukiko Iwasaki, Nobuyuki Koinuma, Takashi Sakamaki, Kazuhiko Yuki, Ryuji Yoshida, Megumi Ohtoshi
  • Publication number: 20080223515
    Abstract: A sheet laminator includes a bonding unit and a restricting unit. The bonding unit bonds a first sheet to a second sheet that includes an adhesive layer. The restricting unit restricts movement of any one of the first sheet and the second sheet thereby preventing bonding between the first sheet and the second sheet before the first sheet and the second sheet reach the bonding unit.
    Type: Application
    Filed: March 14, 2008
    Publication date: September 18, 2008
    Inventors: Kazuhisa Sudo, Mikio Ishibashi, Reki Nakamura, Megumi Ohtoshi, Yukiko Iwasaki, Kazuhiko Yuki, Nobuyuki Koinuma, Takashi Sakamaki, Ryuji Yoshida, Takehide Mizutani, Kohsuke Yamamoto
  • Publication number: 20080063447
    Abstract: An image forming apparatus includes an image carrier configured to carry an image on a surface thereof, a cleaning unit including a cleaning blade and configured to remove residual toner remaining on the surface of the image carrier with the cleaning blade, and an application unit including a brush roller having a modified cross-section fiber and configured to use the brush roller to scrape molded lubricant into scraped lubricant and apply the scraped lubricant to the image carrier. A process cartridge is provided to the image forming apparatus and integrally includes the image carrier, the cleaning unit, the application unit, and at least one of a charging unit and a developing unit in a single unit.
    Type: Application
    Filed: September 11, 2007
    Publication date: March 13, 2008
    Inventors: Shinichi KAWAHARA, Kohsuke Yamamoto, Takehide Mizutani