Patents by Inventor Kunio Satou

Kunio Satou 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: 8139557
    Abstract: A radio base-station apparatus with improved frame transmission efficiency by avoiding interference of preambles and frame control information between sectors of a cell or between cells with a frequency reuse factor. In the apparatus OFDMA multiple-access processing is performed for each of a plurality of sectors of a cell, and frames made of logical subchannel numbers and OFDMA symbol numbers are configured in synchronization respectively for the plurality of sectors, and offsets are added to the beginnings of given frames such that the preambles and frame control information arranged sequentially from the beginnings of the frames do not overlap on the OFDMA symbol numbers.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: March 20, 2012
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tsuyoshi Tominaga, Kunio Satou, Yasuhiro Ohnaka, Takeshi Fukunaga
  • Patent number: 7817957
    Abstract: The invention provides a double feed sensing device capable of sensing double feed of paper sent out for the first time. The double feed sensing device includes a thickness sensing unit for sensing thickness of cut paper conveyed, a rigidity sensing unit for sensing bending rigidity of the conveyed paper, and a double feed determining unit for comparing a value of the thickness of the paper sensed by the thickness sensing unit and a value of the bending rigidity of the paper sensed by the rigidity sensing unit with threshold values of thickness and rigidity of the paper set based on values of thickness and bending rigidity of one sheet of the paper and values of thickness and bending rigidity of stacked sheets of the paper, so as to determine whether the paper is double-fed or not.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: October 19, 2010
    Assignee: Ricoh Company, Ltd.
    Inventors: Shunichi Oohara, Kunio Satou, Masuo Furutono
  • Publication number: 20080253355
    Abstract: A radio base-station apparatus with improved frame transmission efficiency by avoiding interference of preambles and frame control information between sectors of a cell or between cells with a frequency reuse factor. In the apparatus OFDMA multiple-access processing is performed for each of a plurality of sectors of a cell, and frames made of logical subchannel numbers and OFDMA symbol numbers are configured in synchronization respectively for the plurality of sectors, and offsets are added to the beginnings of given frames such that the preambles and frame control information arranged sequentially from the beginnings of the frames do not overlap on the OFDMA symbol numbers.
    Type: Application
    Filed: September 30, 2005
    Publication date: October 16, 2008
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Tsuyoshi Tominaga, Kunio Satou, Yasuhiro Ohnaka, Takeshi Fukunaga
  • Patent number: 7246890
    Abstract: When an refresh ink droplet ejected from a nozzle and deflected by an inclined electric field impinges on a orifice electrode/ink receiving member, electric charge is discharged from the refresh ink droplet, thereby an electric current is generated. A current-voltage converter/amplifier detects the electric current and outputs a detection signal. A defective-condition determining circuit determines an ejection condition of a nozzle element based on voltage value of the detection signal.
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: July 24, 2007
    Assignee: Ricoh Printing Systems, Ltd.
    Inventors: Takahiro Yamada, Shinya Kobayashi, Hitoshi Kida, Kunio Satou
  • Patent number: 7222946
    Abstract: An ink jet head includes: a chamber plate having a plurality of pressuring chambers formed therein for storing an ink; a vibrating plate bonded to the chamber plate; a housing having an ink flow path through which an ink is supplied into the pressuring chambers; an orifice through which an ink is ejected from the pressuring chambers; and a longitudinal vibration mode piezoelectric element for generating pressure under which an ink droplet is ejected through the orifice. A thickness of the vibration plate is from 5 ?m to 10 ?m.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: May 29, 2007
    Assignee: Ricoh Printing Systems, Ltd.
    Inventors: Osamu Machida, Kunio Satou, Kazuo Shimizu, Yoshinari Suzuki
  • Publication number: 20070018383
    Abstract: The invention provides a double feed sensing device capable of sensing double feed of paper sent out for the first time. The double feed sensing device includes a thickness sensing unit for sensing thickness of cut paper conveyed, a rigidity sensing unit for sensing bending rigidity of the conveyed paper, and a double feed determining unit for comparing a value of the thickness of the paper sensed by the thickness sensing unit and a value of the bending rigidity of the paper sensed by the rigidity sensing unit with threshold values of thickness and rigidity of the paper set based on values of thickness and bending rigidity of one sheet of the paper and values of thickness and bending rigidity of stacked sheets of the paper, so as to determine whether the paper is double-fed or not.
    Type: Application
    Filed: July 10, 2006
    Publication date: January 25, 2007
    Applicant: Ricoh Printing Systems, Ltd.
    Inventors: Shunichi Ohara, Kunio Satou, Masuo Furutono
  • Patent number: 7018010
    Abstract: A computer portion 201 of a printer includes a memory storing a printer driver software 201a and nozzle profile data 211. The printer driver software 201a includes a raster image processor (RIP) 203. When the RIP 203 receives document data 209, the RIP 203 converts the document data 209 into bitmap data 210 which is one dot/one bit data for 300 data/inch. Then, the nozzle data converting portion 204 converts the bitmap data 210 into driving data 212 based on the nozzle profile data 211. At this time, each bit of the bitmap data 210 is replaced by 16 bits. That is, the data amount is increased to 16 times of the bitmap data 210. Accordingly, fine control of ink ejection can be achieved.
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: March 28, 2006
    Assignee: Ricoh Printing Systems, LTD
    Inventors: Shinya Kobayashi, Takahiro Yamada, Kazuo Shimizu, Kunio Satou, Hitoshi Kida
  • Patent number: 6908166
    Abstract: During a printing operation, a recording device is switched from a normal mode to a refresh ejection mode so as to temporarily increase an ejection frequency. A refresh ink droplet ejected in the refresh ejection mode is deflected to impinge on an ink collector. Recording ink droplets ejected in the refresh ejection mode are deflected and impinge on a recording sheet at positions that are shifted by gradually smaller distances.
    Type: Grant
    Filed: July 25, 2003
    Date of Patent: June 21, 2005
    Assignee: Ricoh Printing Systems, Ltd.
    Inventors: Shinya Kobayashi, Takahiro Yamada, Kunio Satou, Hitoshi Kida
  • Patent number: 6837574
    Abstract: A recording head 200 has a plurality of nozzle orifices aligned in a row extending in a first direction. The recording head 200 is arranged with the nozzle orifices in confrontation with a recording medium P. The recording medium P is moved in a second direction B with respect to the recording head 200. Also, ink droplets ejected from the nozzle orifices are charged to a charged amount that corresponds to deflection amount of the ink droplets. The charged ink droplets are deflected in a direction perpendicular to a main scanning line. The plurality of ink droplets ejected from the plurality of nozzle orifices impinge on the same pixel position or at a nearby position so that it is possible to impinge multiple droplets at the same pixel position or a nearby position. As a result, it is possible to back up broken nozzles and to reduce recording distortion.
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: January 4, 2005
    Assignee: Hitachi Printing Solutions, Ltd.
    Inventors: Takahiro Yamada, Shinya Kobayashi, Hitoshi Kida, Kunio Satou, Toshitaka Ogawa, Yoshikane Matsumoto, Katsunori Kawasumi, Kazuo Shimizu
  • Patent number: 6814432
    Abstract: An inkjet recording device includes an ink reservoir that stores ink, a recording head having a plurality of nozzle holes for forming recording dots on a recording medium by ejecting ink particles from the plurality of nozzle holes onto the recording medium positioned opposite the plurality of nozzle holes, an ink channel for supplying ink from the ink reservoir to the recording head, ink discharging means for discharging ink from the recording head and the ink channel, evacuating means for creating a vacuum state in the recording head and the ink channel, and ink filling means for filling the evacuated recording head and ink channel with deaerated ink. The ink discharging means divides the recording head and the ink channel into a plurality of sections and independently discharges ink from each section of the recording head and the ink channel.
    Type: Grant
    Filed: June 6, 2003
    Date of Patent: November 9, 2004
    Assignee: Hitachi Printing Solutions, Ltd.
    Inventors: Takahiro Yamada, Kunihiro Tamahashi, Akemi Ouchi, Kunio Satou, Kazuo Shimizu, Hitoshi Kida, Hidetoshi Fujii
  • Publication number: 20040207676
    Abstract: When an refresh ink droplet ejected from a nozzle and deflected by an inclined electric field impinges on a orifice electrode/ink receiving member, electric charge is discharged from the refresh ink droplet, thereby an electric current is generated. A current-voltage converter/amplifier detects the electric current and outputs a detection signal. A defective-condition determining circuit determines an ejection condition of a nozzle element based on voltage value of the detection signal.
    Type: Application
    Filed: March 25, 2004
    Publication date: October 21, 2004
    Inventors: Takahiro Yamada, Shinya Kobayashi, Hitoshi Kida, Kunio Satou
  • Patent number: 6796632
    Abstract: An orifice electrode/ink receiving member 11 is attached to an orifice plate 13 that is attached to a recording head module 10. An ink absorbing member 111 is embedded in a lower surface of the orifice electrode/ink receiving member 11. A recording ink droplet 14 ejected through an orifice 12 is deflected as needed by an angled electric field 85 and then impinges on a recording sheet 60 to form a recording dot 70. On the other hand, a refresh ink droplet 15 is deflected by the angled electric field 85 and impinges on the ink absorbing member 111 of the orifice electrode/ink receiving member 11 after flying in a U-turn path. In this configuration, the ink absorbing member 111 provided to the orifice electrode/ink receiving member 11 collects ink, so that there is no need to increase a gap between the recording head module 10 and the recording sheet 60 so much in order to dispose the ink absorbing member 111, preventing decrease in recording precision and paper jam.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: September 28, 2004
    Assignee: Hitachi Printing Solutions, Ltd.
    Inventors: Takahiro Yamada, Kunio Satou, Shinya Kobayashi, Hitoshi Kida, Kazuo Shimizu, Lee Chahn
  • Patent number: 6767087
    Abstract: A plurality of nozzle rows are formed in a nozzle plate, and nozzle electrodes for generating a deflecting field are provided for every two nozzle rows. Each electrode is attached to the nozzle plate so as to locate between the corresponding adjacent two nozzles. Ink reception absorption bodies are embedded in the bottom surface of the electrodes. Refresh ink droplets deflected by the deflecting field travels along U-turn paths and impinge on the ink reception absorption bodies.
    Type: Grant
    Filed: December 27, 2002
    Date of Patent: July 27, 2004
    Assignee: Hitachi Printing Solutions, Ltd.
    Inventors: Takahiro Yamada, Kunio Satou, Shinya Kobayashi, Hitoshi Kida
  • Publication number: 20040130584
    Abstract: During a printing operation, a recording device is switched from a normal mode to a refresh ejection mode so as to temporarily increase an ejection frequency. A refresh ink droplet ejected in the refresh ejection mode is deflected to impinge on an ink collector. Recording ink droplets ejected in the refresh ejection mode are deflected and impinge on a recording sheet at positions that are shifted by gradually smaller distances.
    Type: Application
    Filed: July 25, 2003
    Publication date: July 8, 2004
    Inventors: Shinya Kobayashi, Takahiro Yamada, Kunio Satou, Hitoshi Kida
  • Patent number: 6749291
    Abstract: An inkjet head selectively ejects recording ink droplets and refresh ink droplets. The recording ink droplets are deflected so as to impinge on target locations on a recording medium, thereby forming recording dots thereon. On the other hand, the refresh ink droplets are deflected so as to impinge on an ink absorbing member. The ink clinging on the ink absorbing member is collected into an ink tank and reused. The ink absorbing member functions as a filter for preventing impurities being collected into the ink tank along with the ink.
    Type: Grant
    Filed: April 3, 2003
    Date of Patent: June 15, 2004
    Assignee: Hitachi Printing Solutions, Ltd.
    Inventors: Kunio Satou, Takahiro Yamada, Hitoshi Kida, Akemi Ouchi, Tsutomu Maekawa, Hidetoshi Fujii
  • Patent number: 6749279
    Abstract: When a pixel-dividing number is increased to a predetermined number or more, then nozzles in each nozzle group become in one-to-one correspondence with the sub-pixel number, so that only one of the nozzles performs ink ejection at one time. Accordingly an analog driving signal drives only a single nozzle in the corresponding group at one time. Therefore, by trimming the analog driving signal in accordance with a subject nozzle each time, the all-amount trimming is possible without providing a large number of analog-driving-signal generating devices for all of the nozzles.
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: June 15, 2004
    Assignee: Hitachi Printing Solutions, Ltd.
    Inventors: Shinya Kobayashi, Eiichi Toyama, Hitoshi Kida, Kunio Satou, Takashi Sekino, Susumu Saito
  • Patent number: 6746095
    Abstract: When ink droplets are ejected, angled or splashed where a plurality of minute ink droplets are generated, angled or splashed ink clings on an electrode 401, 402 and increases the amount of electric current conducted therethrough. Hence, the defectiveness of ink ejection can be detected by monitoring the amount of the electric current. When the defectiveness of ink ejection is detected, ejection data D is retrieved and updates the ejection data D based on a condition register S, and set to a defect register E. When the defect register E has only one element that takes a condition value of 1 indicating defectiveness, the corresponding nozzle is identified as defective. The restoring means reallocates dots, which have been originally allocated to the defective nozzle, to neighboring nozzle.
    Type: Grant
    Filed: September 21, 2001
    Date of Patent: June 8, 2004
    Assignee: Hitachi Printing Solutions, Ltd.
    Inventors: Shinya Kobayashi, Takahiro Yamada, Hitoshi Kida, Kunio Satou, Katsunori Kawasumi, Kazuo Shimizu
  • Patent number: 6702418
    Abstract: When positively charged ink droplets 608 from a defective nozzle impact a negatively charged deflector electrode 320, the positive charge on condenser 609 flows to the ground via a FET 618 of a photo-coupler 610. As a result, the electric discharge occurs by an amount equivalent to the charging amount of the ink droplets 608 clinging on the electrode 320. Because a switching signal 606 is “1”, the ON resistance of the photo-coupler 610 is large, and the ON resistance of the FET 620 of the photo-coupler 612 is small. Accordingly, the discharge due to the charged ink droplets 608 is detected as a large detection voltage and amplified by an operational amplifier 613 . Because the charger voltage of the condenser 609 is static and has no noise, even when the detection output 615 is highly amplified, noise during the detection is suppressed.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: March 9, 2004
    Assignee: Hitachi Printing Solutions, Ltd.
    Inventors: Kunio Satou, Takahiro Yamada, Hitoshi Kida, Shinya Kobayashi, Kazuo Shimizu
  • Patent number: 6679586
    Abstract: A sheet-position synchronizing signal is generated once each time a recording sheet is transported by a single-line worth of distance in a sheet feed direction. A print-driving signal and a refresh-driving signal are generated within a time interval of two successive sheet-position synchronizing signal. When the print-driving signal is applied to a piezoelectric element of a nozzle, then a print ink droplet is ejected, thereby a dot is formed on a recording sheet. On the other hand, when the refresh-driving signal is applied to the piezoelectric element, then a negatively-charged refreshing ink droplet is ejected. The refresh ink droplet refreshing ink droplet is deflected by an electric field and collected by a metal mesh without reaching the recording sheet.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: January 20, 2004
    Assignee: Hitachi Printing Solutions, Ltd.
    Inventors: Shinya Kobayashi, Takahiro Yamada, Kunio Satou, Hitoshi Kida
  • Publication number: 20030227524
    Abstract: An inkjet recording device includes an ink reservoir that stores ink, a recording head having a plurality of nozzle holes for forming recording dots on a recording medium by ejecting ink particles from the plurality of nozzle holes onto the recording medium positioned opposite the plurality of nozzle holes, an ink channel for supplying ink from the ink reservoir to the recording head, ink discharging means for discharging ink from the recording head and the ink channel, evacuating means for creating a vacuum state in the recording head and the ink channel, and ink filling means for filling the evacuated recording head and ink channel with deaerated ink. The ink discharging means divides the recording head and the ink channel into a plurality of sections and independently discharges ink from each section of the recording head and the ink channel.
    Type: Application
    Filed: June 6, 2003
    Publication date: December 11, 2003
    Inventors: Takahiro Yamada, Kunihiro Tamahashi, Akemi Ouchi, Kunio Satou, Kazuo Shimizu, Hitoshi Kida, Hidetoshi Fujii