Patents by Inventor Toshiyuki Itoh

Toshiyuki Itoh 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: 20040254001
    Abstract: The present invention relates to a portable terminal device, such as a cellular phone, which has a screen display section, such as an LCD module, in its upper part and a key manipulation section having an array of plural keys in its lower part. The portable terminal device has a removable battery and is highly protected from water especially in a battery area. There is provided a pair of inner housings, that are a backside inner housing and a front side inner housing, which form a battery compartment having an opening for battery insertion/removal. A key manipulation sheet is disposed on the front side inner housing, and the whole components are covered with a pair of outer housings.
    Type: Application
    Filed: January 28, 2004
    Publication date: December 16, 2004
    Inventors: Kazuhiro Kakuguchi, Yoshiaki Kato, Atsuko Yamamoto, Toshiyuki Itoh
  • Publication number: 20040058346
    Abstract: The present invention provides a polynucleotide cleavage agent switched on by photo-irradiation and a method of cleaving or decomposing a polynucleotide such as DNA or RNA using this agent switched on in this manner. More specifically, said polynucleotide cleavage agent switched on by photo-irradiation comprises cyclopropane or a 2,2-dihalogeno-cyclopropane ring between “A” unit and “B” unit, wherein said “A” unit is an aromatic group having an electron withdrawing property and is excited by photo-irradiation, and said “B” unit is a hydrophilic functional group. Said polynucleotide cleavage agent may further contain “C” unit which can recognize DNA sequences, and also a spacer molecule, if desired.
    Type: Application
    Filed: March 5, 2003
    Publication date: March 25, 2004
    Applicant: TOTTORI UNIVERSITY
    Inventors: Toshiyuki Itoh, Keiko Ninomiya, Masahiko Shishido
  • Publication number: 20040033822
    Abstract: A portable terminal apparatus which can be folded by having a movable portion thereof that rotatably moves with respect to a main body portion thereof in means to accommodate the increasing multiple functions of the portable terminal apparatus and to improve operability.
    Type: Application
    Filed: February 10, 2003
    Publication date: February 19, 2004
    Applicant: FUJITSU LIMITED
    Inventors: Toshiyuki Itoh, Ken Hayashida, Shinako Watabe
  • Publication number: 20040013443
    Abstract: An image forming device has a charger including a charging wire and a wire cleaner for cleaning the charging wire. The wire cleaner has a pair of legs, and cleaning members are provided inside the legs to be able to squeeze the charging wire between them. A stub is provided on the outside of each leg, and the wire cleaner can rotate round the stub, with the result that the cleaning members can move between a regular position in which they are placed on two sides of the charging wire and a step-aside position in which they are farther from the charging wire than in the regular position.
    Type: Application
    Filed: May 6, 2003
    Publication date: January 22, 2004
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Toshiyuki Itoh, Yasuhiro Nozaki
  • Patent number: 6493532
    Abstract: A slide-rotating collar integrally mounted on a resin shaft is configured to have a projected portion at one end of a metallic plate and a recessed portion at the other end thereof such that both ends engageably face each other without aligning in a shaft line direction. The shaft may be used in an electrostatic developing device in an image forming apparatus.
    Type: Grant
    Filed: June 26, 2001
    Date of Patent: December 10, 2002
    Assignee: Ricoh Company, Ltd.
    Inventors: Tomotoshi Nakahara, Keishi Nishioka, Toshiyuki Itoh
  • Patent number: 6438330
    Abstract: This invention relates to a device for detecting when the magnetic toner in the developing unit of an image formation device is empty, and prevents erroneous detection of empty toner even when the fluidity of the magnetic toner becomes poor. The developing device (3) has a stirring unit (30) having a cleaning member (22) for cleaning the position of a toner sensor (10), a toner accumulation section (24), and a magnetic metal member (21). The magnetic metal member (21) and toner accumulation section (24) for preventing erroneous detection of the toner-empty alarm are located at the sensor position of the stirring unit, so it is possible for the toner sensor to synthetically generate output that toner is detected, and thus making it possible to prevent erroneous detection that the toner is empty.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: August 20, 2002
    Assignee: Fujitsu Limited
    Inventor: Toshiyuki Itoh
  • Publication number: 20020021907
    Abstract: This invention relates to a device for detecting when the magnetic toner in the developing unit of an image formation device is empty, and prevents erroneous detection of empty toner even when the fluidity of the magnetic toner becomes poor. The developing device (3) comprises a stirring unit (30) having a cleaning member (22) for cleaning the position of a toner sensor (10), a toner accumulation section (24), and a magnetic metal member (21). The magnetic metal member (21) and toner accumulation section (24) for preventing erroneous detection of the toner-empty alarm are located at the sensor position of the stirring unit, so it is possible for the toner sensor to synthetically generate output that toner is detected, and thus making it possible to prevent erroneous detection that the toner is empty.
    Type: Application
    Filed: February 9, 2001
    Publication date: February 21, 2002
    Applicant: Fujitsu Limited, Kawasaki, Japan
    Inventor: Toshiyuki Itoh
  • Publication number: 20020018671
    Abstract: A slide-rotating collar integrally mounted on a resin shaft is configured to have a projected portion at one end of a metallic plate and a recessed portion at the other end thereof such that both ends engageably face each other without aligning in a shaft line direction. The shaft may be used in an electrostatic developing device in an image forming apparatus.
    Type: Application
    Filed: June 26, 2001
    Publication date: February 14, 2002
    Applicant: Ricoh Company, LTD.
    Inventors: Tomotoshi Nakahara, Keishi Nishioka, Toshiyuki Itoh
  • Patent number: 5633673
    Abstract: Disclosed is a recording system in which an operation performed on the side of a printer unit in order to change over recording density is delayed while a recording operation is in progress. When a recording density changeover command is received during a recording operation, the density changeover is performed after the recording operation ends. A control unit which controls the printer unit is informed of the fact that the measures for changing over the recording density have been completed on the printer unit side.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: May 27, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kaoru Sato, Toshiyuki Itoh, Akihisa Kusano, Makoto Abe, Toshihiko Inuyama, Masanori Ishizu, Kazuhiko Okazawa, Junichi Kimizuka
  • Patent number: 5511161
    Abstract: The invention provides an interunit communication system which comprises a main unit and a plurality of subunits and executes a communication between the units by a microcomputer of each unit. The system comprises: power producing means, provided for each subunit, for producing a driving power for the microcomputer of the subunit by a power which is supplied from the main unit through a power line; resetting means, provided for each subunit, for resetting the microcomputer of the subunit in the case where the power supply was restarted after the power supply from the main unit had been shut off; detecting means, provided for the main unit, for detecting a runaway of the microcomputer of the subunit on the basis of a reception state from a signal line for communication; power shut-off means, provided for the main unit, for shutting off the power supply to the subunit when the detecting means detects the runaway of the microcomputer; and power restarting means for restarting the power supply to the subunit.
    Type: Grant
    Filed: November 29, 1993
    Date of Patent: April 23, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kaoru Sato, Toshiyuki Itoh, Kazuhiko Okazawa, Junichi Kimizuka, Akihisa Kusano, Makoto Abe, Toshihiko Inuyama
  • Patent number: 5450170
    Abstract: An image forming apparatus includes a movable image bearing member; an image forming device for forming an image on the image bearing member; a transfer device for transferring an image from the image bearing member onto a recording material at a transfer position; a detector for detecting a recording material conveying passage from a recording material feeding station to the image transfer position; and a controller responsive to the detector to form blanks at a leading and trailing edges of the recording material by controlling image forming operation of the image forming device.
    Type: Grant
    Filed: October 4, 1993
    Date of Patent: September 12, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Junichi Kimizuka, Toshiyuki Itoh, Kaoru Sato, Akihisa Kusano, Kazuhiko Okazawa, Toshihiko Inuyama, Makoto Abe
  • Patent number: 5420396
    Abstract: A heating apparatus comprising a heating member, energization element for energizing said heating member, a temperature detection member for detecting a temperature of said heating member, a first switching element for turning on/off energization by said energization means on the basis of the temperature detected by said temperature detection member, abnormal current detection element for detecting an abnormal current flowing through said heating member, a second switching element for turning off energization by said energization element, and energization stop member for operating said second switching element to turn off energization.
    Type: Grant
    Filed: February 26, 1992
    Date of Patent: May 30, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiyuki Itoh, Toshihiko Inuyama, Takeji Gima, Hiroshi Hashimoto, Hiromichi Yamanaka, Masanori Ishizu
  • Patent number: 5398100
    Abstract: An image recording apparatus operated in synchronism with a vertical synchronization signal from an external device comprises a unit for sending out to the external device a signal indicating a status to accept the vertical synchronization signal, and switching device for switching between a plurality of operation modes related to an elapsed time from the send-out of the signal by the signal sending unit.
    Type: Grant
    Filed: June 29, 1993
    Date of Patent: March 14, 1995
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masanori Ishizu, Toshihiko Inuyama, Takeji Gima, Hiroshi Hashimoto, Hiromichi Yamanaka, Soya Endo, Toshiyuki Itoh, Hitoshi Machino, Tomohiro Nakamori
  • Patent number: 5359400
    Abstract: The present invention provides an image forming apparatus with a sheet supply cassette which can contain a plurality of recording members and can be removably mounted within the image forming apparatus, an image forming device for forming an image on the recording member with toner to form a toner image, fixing rollers having a heater for thermally fixing the toner image on the recording member, remaining amount detecter means for detecting the remaining amount of the recording members in the sheet supply cassette or/and a remaining amount of the toner and generating a detection signal, and energization stopping control for stopping the energization of the heater on the basis of the detection signal.
    Type: Grant
    Filed: December 10, 1992
    Date of Patent: October 25, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshiyuki Itoh, Junichi Kimizuka, Takeji Gima
  • Patent number: 5334817
    Abstract: A temperature control device for controlling a surface temperature of a member to be heated at a predetermined temperature includes a detector for detecting the surface temperature, and a control unit for controlling current supply for a heating source for heating the member to be heated so that a result of detection by the detector is maintained at a predetermined value. The control unit controls a time of current supply for the heating source during a constant temperature control according to data relating to peak temperatures of the surface temperature during the constant temperature control.
    Type: Grant
    Filed: July 9, 1991
    Date of Patent: August 2, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomohiro Nakamori, Kazuhiko Okazawa, Tatsuto Tachibana, Akihisa Kusano, Kaoru Sato, Toshiyuki Itoh
  • Patent number: 5321478
    Abstract: An image forming apparatus includes an image forming unit for forming an undeveloped image on a recording material, heating fixing unit for fixing the undeveloped image on the recording material by heating. The heating fixing unit includes a heating member heated by a heater, a temperature detector for detecting a temperature of the heating member, and a current-supply control unit for controlling current supply to the heater so that the temperature detected by the temperature detector is maintained at a predetermined control temperature in a standby state. The apparatus further includes an electric-power reduction unit for reducing or cutting electric power supplied to the heater when an image forming signal is not input for a predetermined time period after the completion of an image forming operation, and a discriminating unit for discriminating the frequency of image forming operations.
    Type: Grant
    Filed: March 24, 1993
    Date of Patent: June 14, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiro Nakamura, Junichi Kimizuka, Takeji Gima, Toshiyuki Itoh
  • Patent number: 5251139
    Abstract: A system for measuring a traveling direction of a vehicle includes a geomagnetic sensor and a gyro sensor. The system utilizes first and second indicies for deriving the vehicle traveling direction. The first index is indicative of disturbance of a geomagnetic field on a short interval basis, and the second index is indicative of disturbance of the geomagnetic field on a long interval basis. The system further utilizes a correction value indicative of a drift error caused by the gyro sensor for deriving the vehicle traveling direction. The system varies a rate of dependence upon an output of the geomagnetic sensor and an output of the gyro sensor based on the first and second indicies and the correction value when calculating the vehicle traveling direction.
    Type: Grant
    Filed: November 1, 1990
    Date of Patent: October 5, 1993
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Kenji Takano, Hiroshi Tsuda, Toshiyuki Itoh
  • Patent number: 5206811
    Abstract: A navigation system for an automotive vehicle includes a map data storage unit. The storage unit stores first known target points and adjoining target points preselected for each of the first target points from the first target points. The storage unit further stores a first data group associated with each of the first target points. Each of the first data groups includes a second data group corresponding to each of the adjoining target points of the corresponding first target point. Each of the second data groups includes an abstract configuration of the corresponding first target point and a travel information required at the corresponding first target point for going to the corresponding adjoining target point. The system selects second target points from the first target points to define a vehicle travel route. The system further selects one of the second data groups based on third and fourth target points selected from the second target points.
    Type: Grant
    Filed: June 24, 1992
    Date of Patent: April 27, 1993
    Assignee: Nissan Motor Company, Limited
    Inventors: Toshiyuki Itoh, Hiroshi Tsuda, Kiyomichi Yamada, Katsuhiko Mizushima, Kouichi Ide
  • Patent number: 5196885
    Abstract: An image forming apparatus includes an image forming device for forming an image on a recording material, the image forming device including an image bearing member, a movable charging member for charging the image bearing member and a power source for supplying electric power to the charging member; a constant current controller for supplying the charging member with a predetermined constant level of electric current; and a second controller for controlling an image forming condition by the image forming device on the basis of plural voltage provided at different points of time during a constant current control operation with the same constant current level by the constant current controller.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: March 23, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiko Takeuchi, Akihisa Kusano, Junichi Kimizuka, Kaoru Sato, Toshiyuki Itoh, Masanori Ishizu, Toshihiko Inuyama, Kazuhiko Okazawa, Tatsuto Tachibana
  • Patent number: 5172138
    Abstract: A positioning apparatus for positioning a reciprocally movable member, such as a guide member for a sheet of recording paper, between a reference position and a predetermined position. The apparatus includes a detector for detecting that the movable member is in the proximity of the reference position, and a counter for counting the amount by which the movable member is shifted while the detector is detecting that the movable member is in the proximity of the reference position. A controller stores the value counted by the counter, and controls drive of the movable member when the movable member is being returned to the reference position based on the count in the counter and the stored count value. A second counter may be provided to count the amount by which the movable member is shifted from the reference position to the predetermined position.
    Type: Grant
    Filed: February 20, 1991
    Date of Patent: December 15, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuhiko Okazawa, Toshiyuki Itoh, Kaoru Sato, Tatsuto Tachibana, Akihisa Kusano