Patents by Inventor Yoji Yamaguchi

Yoji Yamaguchi 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: 8385769
    Abstract: An image forming apparatus, including: a plurality of charging members, each applying charging voltage between the charging member and corresponding charged body, a plurality of cleaning members, each removing adherent matters by reciprocating in a contact state with each of the charging members, each waiting in a waiting position in a non-cleaning time, a plurality of detection units, each detection unit detecting by availability of electric connection whether each of the cleaning members is located in the waiting position, and a series circuit that connects the plurality of detection units in series, wherein, when the plurality of cleaning members clean the plurality of charging members: an outward movement is started from a cleaning member on a side corresponding to one end of the series circuit, and a homeward movement is completed by the cleaning member on the side corresponding to the one end of the series circuit.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: February 26, 2013
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoji Yamaguchi, Tomoya Ichikawa
  • Patent number: 8212141
    Abstract: There is provided a high-sensitivity organic semiconductor radiation/light sensor and a radiation/light detector which can detect rays in real time. In the high-sensitivity organic semiconductor radiation/light sensor, a signal amplification wire 2 is embedded in an organic semiconductor 1. Carriers created by passage of radiation or light are avalanche-amplified by a high electric field generated near the signal amplification wire 2 by means of applying a high voltage to the signal amplification wire 2, thus dramatically improving detection efficiency of rays. Hence, even rays exhibiting low energy loss capability can be detected in real time with high sensitivity.
    Type: Grant
    Filed: October 20, 2006
    Date of Patent: July 3, 2012
    Assignees: Niigata University, Japan Carlit Co., Ltd.
    Inventors: Hitoshi Miyata, Yoshimasa Fujigaki, Yoji Yamaguchi, Yoshinori Muto, Masaaki Tamura
  • Patent number: 8135293
    Abstract: The image forming apparatus includes: an image forming section forming an image on a recording medium; an attachable and detachable storing container storing waste powder discarded and transported from the image forming section; a transport path for transporting the waste powder; a first discharging part allowed to be shut off and discharging the waste powder to an outside of the transport path; a second discharging part provided downstream of the first discharging part in a transporting direction and discharging the waste powder to the storing container; a powder storage part storing the waste powder when the storing container is removed; and a controller causing the shut first discharging part to be opened when the storing container is removed, and causing the waste powder to be discharged from the first discharging part. The powder storage part has capacity enough for storing the waste powder when the first discharging part is opened.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: March 13, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoji Yamaguchi, Tomoya Ichikawa, Mihoko Tanaka
  • Patent number: 8135326
    Abstract: An image forming apparatus includes a developer housing that holds a developer; a lubricant supply brush that rotates when in contact with the developer housing, and that supplies a lubricant to a surface of the developer housing; a lubricant that is in contact with the lubricant supply brush; a first voltage supply unit that supplies an AC voltage on which a DC voltage is superimposed to the lubricant supply brush; a determination unit that determines whether or not a usage state of the developer housing is a state at an initial stage; and a controller that controls the first voltage supply unit to supply the AC voltage on which the DC voltage is superimposed to the lubricant supply brush, prior to start of execution of an image forming operation if the determination unit determines that the usage state of the developer housing is the state at the initial stage.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: March 13, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shigeo Ohno, Tomoya Ichikawa, Yoji Yamaguchi, Kuniaki Tanaka
  • Patent number: 8131165
    Abstract: An image forming apparatus includes: an image forming section including first and second image forming parts each forming a toner image by using an image forming unit to be mounted, the first and the second image forming parts being inhibited from forming respective toner images if an image forming unit is not mounted to the first image forming part, the first image forming part being allowed to form a toner image if an image forming unit is mounted to the first image forming part while an image forming unit is not mounted to the second image forming part; and a transporting section including first and second receiving parts receiving waste powder discarded by the first and second image forming parts, respectively, and that transports the received waste powder. The second receiving part is provided downstream of the first receiving part in a transporting direction of the waste powder.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: March 6, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoji Yamaguchi, Shigeo Ohno, Tomoya Ichikawa, Mihoko Tanaka
  • Patent number: 8116645
    Abstract: The image forming apparatus includes: an image forming section forming an image on a recording medium; first and second storing containers attachably and detachably provided and storing waste powder discarded from the image forming section; a first discharging part allowed to be shut off and discharging the waste powder to the first storing container; a second discharging part discharging the waste powder to the second storing container; a first transporting section transporting the waste powder to the first discharging part; a second transporting section transporting, toward the second discharging part, the waste powder transported to the first discharging part, when the first discharging part is shut off; and a controller shutting off the first discharging part and stopping the first transporting section or reducing an output of the first transporting section, when the first storing container is removed in a state where the first discharging part is opened.
    Type: Grant
    Filed: February 24, 2009
    Date of Patent: February 14, 2012
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoji Yamaguchi, Tomoya Ichikawa, Mihoko Tanaka
  • Publication number: 20110315939
    Abstract: A near infrared absorbent dye is provided, having excellent heat resistance and excellent moisture resistance, as is a near infrared shielding filter using the dye. The near infrared absorbent dye contains an association form of a diimmonium salt compound represented by formula (1): wherein R1 to R8 are the same or different and each represents an organic group, and X? represents an anion.
    Type: Application
    Filed: February 18, 2010
    Publication date: December 29, 2011
    Applicant: Japan Carlit Co., Ltd.
    Inventors: Akinori Okayasu, Susumu Yamanobe, Masaaki Tamura, Yoji Yamaguchi
  • Patent number: 7965972
    Abstract: An image forming apparatus includes: an image forming section forming an image on a recording medium; first and second storage parts storing waste powder discarded from the image forming section; a transport path of the waste powder; first and second discharging parts provided on the transport path and discharging the waste powder to the first and second storage parts, respectively; a transporting section provided along the transport path between both discharging parts, and transporting the waste powder toward the second and first discharging parts in first and second operating states, respectively; a feeding section feeding the waste powder from the image forming section to the transport path between both discharging parts; and a controller making the transporting section operate in both operating states, and stopping the feeding section or reducing its output when switching a transporting direction of the waste powder by switching from the first to second operating state.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: June 21, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Tomoya Ichikawa, Yoji Yamaguchi, Mihoko Tanaka
  • Patent number: 7835667
    Abstract: A discharger includes: a discharge electrode member that is placed opposedly to a member to be charged; an opposed electrode member that is placed opposedly to the discharge electrode member; and a power source circuit that applies a discharge voltage for generating a discharge between the discharge electrode member and the opposed electrode member, and the electrode member having a surface that includes a covered layer covered by a covering material is formed on a surface opposed thereto, and the covering material containing a carbon atom, or a carbon atom and another atom or other plural atoms as a main component, and having an SP3 structure by a carbon atom.
    Type: Grant
    Filed: February 5, 2008
    Date of Patent: November 16, 2010
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Shigeo Ohno, Tsutomu Sugimoto, Tomoya Ichikawa, Yasuo Takayama, Yoji Yamaguchi, Yoshitaka Kuroda, Tohru Inoue, Kuniaki Tanaka, Takahiro Shinkawa, Hiroki Murakami
  • Publication number: 20100209134
    Abstract: An image forming apparatus is provided, the image forming apparatus including: a plurality of charging members which apply charging voltage between each charging member and corresponding charged body; a plurality of cleaning members which remove adherent matters by reciprocating in a contact state with each charging member and wait in a waiting position in a non-cleaning time; a plurality of detection units which detect by availability of electric connection whether each cleaning member is located in the waiting position; and a series circuit that connects the detection units in series, wherein when the cleaning members clean the charging members, an outward movement is started from a cleaning member on a side corresponding to one end of the series circuit, and a homeward movement is completed from a cleaning member on a side corresponding to the other end of the series circuit.
    Type: Application
    Filed: August 27, 2009
    Publication date: August 19, 2010
    Inventors: Yoji Yamaguchi, Tomoya Ichikawa
  • Publication number: 20100080637
    Abstract: An image forming apparatus includes: an image forming section including first and second image forming parts each forming a toner image by using an image forming unit to be mounted, the first and the second image forming parts being inhibited from forming respective toner images if an image forming unit is not mounted to the first image forming part, the first image forming part being allowed to form a toner image if an image forming unit is mounted to the first image forming part while an image forming unit is not mounted to the second image forming part; and a transporting section including first and second receiving parts receiving waste powder discarded by the first and second image forming parts, respectively, and that transports the received waste powder. The second receiving part is provided downstream of the first receiving part in a transporting direction of the waste powder.
    Type: Application
    Filed: January 26, 2009
    Publication date: April 1, 2010
    Inventors: Yoji Yamaguchi, Shigeo Ohno, Tomoya Ichikawa, Mihoko Tanaka
  • Publication number: 20100080580
    Abstract: The image forming apparatus includes: an image forming section forming an image on a recording medium; first and second storing containers attachably and detachably provided and storing waste powder discarded from the image forming section; a first discharging part allowed to be shut off and discharging the waste powder to the first storing container; a second discharging part discharging the waste powder to the second storing container; a first transporting section transporting the waste powder to the first discharging part; a second transporting section transporting, toward the second discharging part, the waste powder transported to the first discharging part, when the first discharging part is shut off; and a controller shutting off the first discharging part and stopping the first transporting section or reducing an output of the first transporting section, when the first storing container is removed in a state where the first discharging part is opened.
    Type: Application
    Filed: February 24, 2009
    Publication date: April 1, 2010
    Inventors: Yoji Yamaguchi, Tomoya Ichikawa, Mihoko Tanaka
  • Publication number: 20100080638
    Abstract: An image forming apparatus includes: an image forming section forming an image on a recording medium; first and second storage parts storing waste powder discarded from the image forming section; a transport path of the waste powder; first and second discharging parts provided on the transport path and discharging the waste powder to the first and second storage parts, respectively; a transporting section provided along the transport path between both discharging parts, and transporting the waste powder toward the second and first discharging parts in first and second operating states, respectively; a feeding section feeding the waste powder from the image forming section to the transport path between both discharging parts; and a controller making the transporting section operate in both operating states, and stopping the feeding section or reducing its output when switching a transporting direction of the waste powder by switching from the first to second operating state.
    Type: Application
    Filed: February 18, 2009
    Publication date: April 1, 2010
    Inventors: Tomoya Ichikawa, Yoji Yamaguchi, Mihoko Tanaka
  • Publication number: 20100080579
    Abstract: The image forming apparatus includes: an image forming section forming an image on a recording medium; an attachable and detachable storing container storing waste powder discarded and transported from the image forming section; a transport path for transporting the waste powder; a first discharging part allowed to be shut off and discharging the waste powder to an outside of the transport path; a second discharging part provided downstream of the first discharging part in a transporting direction and discharging the waste powder to the storing container; a powder storage part storing the waste powder when the storing container is removed; and a controller causing the shut first discharging part to be opened when the storing container is removed, and causing the waste powder to be discharged from the first discharging part. The powder storage part has capacity enough for storing the waste powder when the first discharging part is opened.
    Type: Application
    Filed: February 20, 2009
    Publication date: April 1, 2010
    Inventors: Yoji YAMAGUCHI, Tomoya ICHIKAWA, Mihoko TANAKA
  • Publication number: 20100074634
    Abstract: An image forming apparatus includes a developer housing that holds a developer; a lubricant supply brush that rotates when in contact with the developer housing, and that supplies a lubricant to a surface of the developer housing; a lubricant that is in contact with the lubricant supply brush; a first voltage supply unit that supplies an AC voltage on which a DC voltage is superimposed to the lubricant supply brush; a determination unit that determines whether or not a usage state of the developer housing is a state at an initial stage; and a controller that controls the first voltage supply unit to supply the AC voltage on which the DC voltage is superimposed to the lubricant supply brush, prior to start of execution of an image forming operation if the determination unit determines that the usage state of the developer housing is the state at the initial stage.
    Type: Application
    Filed: May 13, 2009
    Publication date: March 25, 2010
    Inventors: Shigeo Ohno, Tomoya Ichikawa, Yoji Yamaguchi, Kuniaki Tanaka
  • Patent number: 7524619
    Abstract: A coloring matter absorbing a near-infrared ray which comprises a diimonium salt containing a sulfonimide as an anion moiety, represented by the general formula (1): wherein R may be the same or different and represents a moiety selected from the group consisting of an alkyl group, a halogenated alkyl group, a cyanoalkyl group, an aryl group, a hydroxyl group, a phenyl group, and a phenylalkylene group, and R1 and R2 may be the same or different and each represent a fluoroalkyl group, or together form a fluoroalkylene group. The coloring matter absorbing a near-infrared ray is excellent in the resistance to heat and moisture, and thus exhibits an ability of absorbing a near-infrared ray not lowering for a long period of time.
    Type: Grant
    Filed: November 18, 2003
    Date of Patent: April 28, 2009
    Assignee: Japan Carlit Co., Ltd.
    Inventors: Susumu Yamanobe, Masaaki Tamura, Yoji Yamaguchi, Hideo Yamamoto
  • Publication number: 20090050815
    Abstract: There is provided a high-sensitivity organic semiconductor radiation/light sensor and a radiation/light detector which can detect rays in real time. In the high-sensitivity organic semiconductor radiation/light sensor, a signal amplification wire 2 is embedded in an organic semiconductor 1. Carriers created by passage of radiation or light are avalanche-amplified by a high electric field generated near the signal amplification wire 2 by means of applying a high voltage to the signal amplification wire 2, thus dramatically improving detection efficiency of rays. Hence, even rays exhibiting low energy loss capability can be detected in real time with high sensitivity.
    Type: Application
    Filed: October 20, 2006
    Publication date: February 26, 2009
    Inventors: Hitoshi Miyata, Yoshimasa Fujigaki, Yoji Yamaguchi, Yoshinori Muto, Masaaki Tamura
  • Publication number: 20080226334
    Abstract: A discharger includes: a discharge electrode member that is placed opposedly to a member to be charged; an opposed electrode member that is placed opposedly to the discharge electrode member; and a power source circuit that applies a discharge voltage for generating a discharge between the discharge electrode member and the opposed electrode member, and the electrode member having a surface that includes a covered layer covered by a covering material is formed on a surface opposed thereto, and the covering material containing a carbon atom, or a carbon atom and another atom or other plural atoms as a main component, and having an SP3 structure by a carbon atom.
    Type: Application
    Filed: February 5, 2008
    Publication date: September 18, 2008
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Shigeo OHNO, Tsutomu SUGIMOTO, Tomoya ICHIKAWA, Yasuo TAKAYAMA, Yoji YAMAGUCHI, Yoshitaka KURODA, Tohru INOUE, Kuniaki TANAKA, Takahiro SHINKAWA, Hiroki MURAKAMI
  • Patent number: 4982312
    Abstract: A charge transfer complex comprising N,N'-alkylene-di-3,5-lutidine as a donor and 7,7,8,8-tetracyanoquinodimethane as an acceptor, the molar ratio of the acceptor to the donor of the charge transfer complex being between 3.0 and 5.0 has a high melting point and excellent electrical conductivity as an electrolyte for a capacitor. A solid electrolytic capacitor employing said charge transfer complex has reduced current leakage and high temperature load characteristics. A chip-type solid electrolytic capacitor employing said charge transfer complex has reduced current leakage, high temperature load characteristics and excellent thermal stability and life characteristics.
    Type: Grant
    Filed: October 27, 1989
    Date of Patent: January 1, 1991
    Assignee: The Japan Carlit Co., Ltd.
    Inventors: Shuko Shindo, Tsuyoshi Aoyama, Yoji Yamaguchi, Isao Isa, Makoto Ebisawa