Patents by Inventor Takashi Kawabata

Takashi Kawabata 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: 20020167920
    Abstract: In a radio random access control method in which a communication access zone is divided into a plurality of sectors, a range of a load regarded as a use range of a channel is converted into a range of a slot use rate, a value of the slot use rate measured in a base station is compared with the range of the slot use rate regarded as the use range of the channel, and a communication traffic volume is controlled according to the comparison of the measured value of the slot use rate with the range of the slot use rate.
    Type: Application
    Filed: October 25, 2001
    Publication date: November 14, 2002
    Inventors: Takuya Miyazaki, Takashi Kawabata
  • Publication number: 20020114292
    Abstract: A radio channel assigning device provided with an assignment request table for detecting the queueing time of data which is queueing in the respective terminal stations, and a channel assignment algorithm controlling the assignment capacity of the communication channels, based on a queueing-time distribution detected by the assignment request table, so as to detect a queueing-time distribution of the transmission data and to cope precisely with the delay time for the respective terminal stations, by processing the transmission data in descending order of a queueing time. Accordingly, the amount of queueing data in the respective terminal stations is not collectively processed, and the terminal station having queueing data whose amount is small as a whole, though its queueing time is long, is capable of being assigned capacity of communication channels.
    Type: Application
    Filed: June 26, 1998
    Publication date: August 22, 2002
    Inventors: TAKASHI KAWABATA, YOICHI MORITANI
  • Patent number: 6430379
    Abstract: An intermediate transfer type image forming apparatus is provided, in which a secondary transfer unit includes a secondary transfer member having a contact transfer member disposed in contact with at least the surface of an intermediate transfer medium, a bias applying unit for applying a transfer bias to transfer a toner image on the intermediate transfer medium through the secondary transfer member to a transfer medium and an inverse transfer bias having the opposite polarity to the transfer bias, and a bias switching unit for switching the applied bias of the bias applying unit so that the transfer bias is applied to an image transfer area on the intermediate transfer medium and the inverse transfer bias is applied to an image non-transfer area on the intermediate transfer medium. The apparatus is also equipped with a disturbing member for disturbing (scraping out, sweeping off or the like) toner adhering to the contact transfer member.
    Type: Grant
    Filed: August 30, 2000
    Date of Patent: August 6, 2002
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Masaaki Takahashi, Naoto Yoshino, Masao Ohkubo, Takashi Kawabata, Yukio Hayashi, Yoko Miyamoto, Makoto Katayama
  • Patent number: 6424645
    Abstract: A TDMA radio communication method including the steps of: providing a latter part of each of super frames with an assignment information notification period which is preceded by an assignment processing period, and providing a remaining part of the each of the super frame with an assignment request collecting period; transmitting, from a terminal station to a base station, assignment request information using a plurality of frames included in the assignment request collecting period; transmitting, from the base station to the terminal station, frame structure information and assignment information over a plurality of frames included in the assignment information notification period; and carrying out, in the base station, channel assignment of a radio channel, changes of the frame structure and of the channel assignment in response to timings of the super frames.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: July 23, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takashi Kawabata, Youichi Moritani, Tomokazu Hamada, Tohru Sogabe
  • Patent number: 6400955
    Abstract: In a radio communication system repeatedly using the same frequency, each base station and terminal station have directional antennas respectively, and a base station has direction-determining patterns for setting a direction of an antenna according to a timing, the adjacent base stations each using the same frequency use different direction-determining. patterns from each other, and remote base stations repeatedly use the same direction-determining patterns. The direction-determining pattern has a correlation between a timing obtained by equally dividing a frame for a communication line by a number of direction-determining patterns and each antenna direction, and a communication slot is allocated based on a timing decided according to the table to a communication line with a terminal station positioned at a particular direction.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: June 4, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Takashi Kawabata, Yuko Mikuni, Yoichi Moritani
  • Patent number: 6400704
    Abstract: A first sector cell is set as an object for measurement (S101). Reception levels in each time slot in the number of TDMA-TDD frames is measured for the object cell (S102) and for all the cells (S103 and S105). The results of the measurement of a specific sector cell are added to the results of the measurement of a sector cell opposite the specific sector cell, and time slots in which control channels can be placed are extracted for each sector cell (S106 to S108). TDMA-TDD frames are then allocated such that the control channels of each sector cell coincide with time slots in which control channels can be placed (S109). In this way, control channels are placed in time slots such that a base station having a sector cell structure avoids interference from the same frequency.
    Type: Grant
    Filed: December 26, 2000
    Date of Patent: June 4, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yuko Mikuni, Takashi Kawabata, Norihiko Toyota
  • Patent number: 6370262
    Abstract: An information processing apparatus using a distance measuring apparatus includes a distance measuring device for producing distance information related to a distance for each of different areas in a scene, a photometry device for measuring brightness information of the scene, the photometry device dividing each of the areas measured by the distance measuring device into a plurality of divided areas and outputting the brightness information for each of the divided areas, and a signal processor. The signal processor detects a characteristic portion on the scene from the distance information for each of the areas and the brightness information from each of the divided areas, detects the characteristic portion in units for each of the divided areas, compares the characteristic portion with standard information on the scene and extracts scene information.
    Type: Grant
    Filed: November 2, 1995
    Date of Patent: April 9, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takashi Kawabata
  • Patent number: 6349192
    Abstract: A tandem type image forming apparatus having plural image forming bodies and an intermediate transfer belt is provided, in which the intermediate transfer belt can be spaced from the image carrying bodies without causing any damage on the intermediate transfer belt. A retracting unit is provided which retracts a belt module along with a secondary transfer module such that a belt-shaped intermediate transfer belt is spaced from all of image carrying bodies.
    Type: Grant
    Filed: August 30, 2000
    Date of Patent: February 19, 2002
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Naoto Yoshino, Shuji Iseki, Minoru Niwa, Takashi Kawabata, Yukio Hayashi, Masaaki Takahashi, Tatsuya Soga, Yoko Miyamoto, Masao Ohkubo
  • Patent number: 6347196
    Abstract: An apparatus and techniques for reducing the electrostatic sticking of a transfer member to the image carrying body of an image forming apparatus. The visible image on the image carrying body is formed by charged participles. A collective transfer unit collectively transfers the visible image from the image carrying body to a transfer member. A transfer member judging unit judges whether a transfer member exists downstream of and in the vicinity of a transfer position of the collective transfer unit. A pre-stop processing unit for preventing, if the transfer member presence judging unit judges that a transfer monitor exists when the stopping unit stops the device, the transfer member from electrostatically sticking to the image carrying body.
    Type: Grant
    Filed: November 22, 1999
    Date of Patent: February 12, 2002
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takashi Kawabata, Shuji Iseki, Keiji Yamamoto, Naoto Yoshino, Naoto Nishi, Nobuyoshi Komatsu, Yukio Hayashi, Tatsuya Soga, Norio Hokari
  • Patent number: 6238408
    Abstract: A balloon-tip catheter having a balloon formed from a polymeric material in the vicinity of the tip of a catheter, wherein the polymeric material forming the balloon comprises a polyolefin obtained by polymerization using a metallocene catalyst.
    Type: Grant
    Filed: October 21, 1999
    Date of Patent: May 29, 2001
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Takashi Kawabata, Masaru Uchiyama, Koichi Sakai
  • Publication number: 20010001609
    Abstract: A first sector cell is set as the object for measurement (S101). Reception levels in each time slot in the number of TDMA-TDD frames corresponding to the number of sector cells within the base station is measured for the object cell (S102). This measurement is performed for all the cells (S103 and S105). The results of the measurement of the reception levels of a specific sector cell are added to the results of the measurement of the reception levels of a sector cell opposite the specific sector cell, and time slots in which control channels can be placed are extracted for each sector cell (S106 to S108). TDMA-TDD frames are then allocated such that the control channels of each sector cell coincide with time slots in which control channels can be placed (S109). As a result, a control channel placement method is provided in which a TDMA-TDD mode is employed and in which control channels are placed in time slots such that a base station having a sector cell structure avoids interference from the same frequency.
    Type: Application
    Filed: December 26, 2000
    Publication date: May 24, 2001
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Yuko Mikuni, Takashi Kawabata, Norihiko Toyota
  • Patent number: 6175711
    Abstract: The image forming apparatus is capable of preventing contamination of the rear surface of paper while minimizing the deterioration of the surface of the transfer roll. The image forming apparatus has an intermediate transfer belt for carrying a toner image visualized by a toner, a transfer roll pressed against the intermediate transfer belt, and a cleaning brush that is rotatable in contact with the transfer roll. This transfer roll acts to transfer the toner image carried on the belt to paper. The cleaning brush makes contact with the transfer roll to stir the toner adhering to the transfer roll.
    Type: Grant
    Filed: September 1, 1999
    Date of Patent: January 16, 2001
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Naoto Yoshino, Tatsuya Soga, Naoto Nishi, Yukio Hayashi, Takashi Kawabata, Shuji Iseki, Keiji Yamamoto, Nobuyoshi Komatsu, Norio Hokari
  • Patent number: 6144831
    Abstract: An image forming apparatus includes: a transfer unit T2 including the inside transfer roll 29, the outside transfer roll 30 transfers the toner image from the toner image holding belt B onto the recording sheet that passes through the transfer region Q4 when transfer voltage is applied to between the inside transfer roll 29 and the outside transfer roll 30; electric-field adjusting conductive member 51 disposed in proximity to and along the inner side of the toner image holding belt B leaving the transfer region Q4 at a position located downstream of the transfer region Q4; and electric-field adjust-potential applying means 53; 54 applies a potential, which weakens an electric field developed between the outside transfer roll 30 and the inside transfer roll 29 in a region located downstream of the transfer region Q4, to the electric-field adjusting conductive member 51.
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: November 7, 2000
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Katsuya Takenouchi, Yasushi Kawahata, Nobuyoshi Komatsu, Keiji Yamamoto, Noriaki Kojima, Yukio Hayashi, Takashi Kawabata, Nobuo Hyakutake, Makoto Katayama, Masao Ohkubo
  • Patent number: 6144451
    Abstract: A focusing state detecting or distance measuring apparatus or camera which measures a focusing state or distance of an object for a plurality of different areas in a scene. The apparatus or camera includes a light receiver for receiving a light beam associated with each area associated in the scene at a light receiving portion corresponding to each area. Each light receiving portion has a plurality of elements and provides an output corresponding to the received light. The apparatus also includes a processing circuit for performing calculation and regulation functions. When performing a calculation function, the circuit performs a correlation calculation on an output of each of the light receiving portions to detect a focusing state or distance for each light receiving portion.
    Type: Grant
    Filed: April 21, 1997
    Date of Patent: November 7, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takashi Kawabata
  • Patent number: 6104899
    Abstract: In an image forming apparatus adapted to transfer a toner image formed on a photosensitive drum to an intermediate transfer belt, and thereafter to a sheet, the position of one end portion of a backup roll around which the intermediate transfer belt is passed is set regulatable, this end portion being fixed after the position thereof has been regulated. The position of one end portion of a driving roll, cleaning blades or photosensitive drum may be set regulatable. This arrangement enables the skew of an image formed on a sheet to be reduced.
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: August 15, 2000
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Norio Hokari, Takashi Kawabata, Keiji Yamamoto, Naoto Yoshino, Naoto Nishi, Nobuyoshi Komatsu, Tatsuya Soga, Shuji Iseki, Yukio Hayashi
  • Patent number: 6084658
    Abstract: A distance measuring apparatus provided with a plurality of light-emitting units and a plurality of light-receiving units. The light emission period of each of the light-emitting units is changed over at each predetermined period interval. A plurality of light-receiving elements constituting each light-receiving unit are constructed so as to receive the reflected lights from a plurality of distance measurement fields of view on an object to be photographed in a plurality of distance measurement zones obtained by dividing a range to be measured into several blocks. The input signal from each of the light-receiving elements in each of the distance measurement zones is changed over in synchronism with the light emission period of the light-emitting units and the output signals for the respective distance measurement zones are compared, whereby a distance data indicative of the distance measurement zone most approximate to the object distance is put out.
    Type: Grant
    Filed: January 9, 1997
    Date of Patent: July 4, 2000
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takashi Kawabata
  • Patent number: 5923938
    Abstract: The present invention prevents a recording sheet from generating wrinkles, by expanding means having an inverted crown shape pressing roll or a special sheet shape discharge restraining baffle, at the nip portion, expanding the recording sheet toward the right and left sides from the central portion in the sheet moving direction, temporal adsorbing means having discharge-output control means for an adsorbing charger or a contact pressure adjustment mechanism of the pressing roll temporarily adsorbing, in the nip portion, the leading end of the recording sheet to the dielectric film with small adsorbing force, correction means having an outer roll and an inner roll or the like disposed between the recording-sheet adsorbing apparatus and a portion for electrostatically transferring a toner image disposed downstream from the recording-sheet adsorbing apparatus applying pressure to the dielectric film to which the recording sheet has been adsorbed so that a state of adsorption of the recording sheet before a firs
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: July 13, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yoshihiro Enomoto, Takashi Kawabata, Yukio Hayashi, Nobuo Hyakutake
  • Patent number: 5905925
    Abstract: An image formation apparatus for transporting a transfer material P and forming an image on the transfer material P is provided with an operation mode dedicated to transfer materials of a multilayer structure In the operation mode, setting of at least one operation condition of an attraction condition of the transfer material P on a transfer material support 8, a transfer condition of a toner image to the transfer material P, a peeling condition of the transfer material P from the transfer material support 8, a fixing condition of a toner image onto the transfer material P, and a static electricity elimination condition of an image support 1 or the transfer material support 8 is changed in response to the characteristics of a resistance value, etc., of the transfer material P.
    Type: Grant
    Filed: December 2, 1997
    Date of Patent: May 18, 1999
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Takashi Kawabata, Yukihiro Enomoto, Yukio Hayashi, Nobuo Hyakutake
  • Patent number: 5882586
    Abstract: A heat-resistant nickel-based alloy having excellent welding properties, said nickel-based alloy consisting essentially of, in terms of wt. %, 0.05 to 0.25% of C, 18 to 25% of Cr, 15 to 25% of Co, at least one selected from the group consisting of up to 3.5% of Mo and 5 to 10% of W, with W+1/2Mo being 5 to 10%, 1.0 to 5.0% of Ti, 1.0 to 4.0% of Al, 0.5 to 4.5% of Ta, 0.2 to 3.0% of Nb, 0.005 to 0.10% of Zr, 0.001 to 0.01% of B and the balance being Ni and unavoidable impurities, wherein the (Al+Ti) content and the (W+1/2Mo) content are within the range surrounded by the lines connecting points A (Al+Ti: 5%, W+1/2Mo: 10%), B (Al+Ti: 5%, W+1/2Mo: 5%), C (Al+Ti: 7%, W+1/2Mo: 5%), and D (Al+Ti: 7%, W+1/2Mo: 10%) excluding the line A-B in FIG. 1.
    Type: Grant
    Filed: July 24, 1997
    Date of Patent: March 16, 1999
    Assignees: Mitsubishi Steel Mfg. Co., Ltd., Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Itaru Tamura, Kazunori Tokoro, Takashi Kawabata, Tsuyoki Kokubun, Toshio Mochizuki, Shuichi Sakashita, Hisataka Kawai, Ikuo Okada, Ichiro Tsuji, Kouji Takahashi, Taiji Torigoe
  • Patent number: RE36280
    Abstract: Disclosed is a focus adjustment information forming device of the kind arranged to measure distances at a plurality of distance measuring areas on a picture plane specified by optical means which has its focal point being adjusted and to form information on adjustment of the focal point, the plurality of distance measuring areas including a center distance area located approximately in the center of the picture plane.
    Type: Grant
    Filed: May 4, 1993
    Date of Patent: August 24, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Kawabata, Yukio Odaka, Hiroshi Miyanari, Eiji Nishimori, Toshiaki Shingu, Yasuteru Ichida, Hidetoshi Masuda