Patents by Inventor Masao Otsuka

Masao Otsuka 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: 7949350
    Abstract: To provide a mobile communication system which can distribute area information from a radio Node to a mobile terminal in a unit of cell. A mobile communication system comprising: a radio Node having a plurality of cells; host apparatus connected to the radio Node so as to be able to communicate information with the radio Node; and a mobile terminal receiving information distributed from the radio Node, wherein area information different for each cell is distributed from the radio Node to the mobile terminals 40 existing in the cell included in the radio Node, the area information is transmitted, together with control information including type information added according to a content of the area information, from the host apparatus to the radio Node, and the cell to be distributed with the information is determined based on the type information.
    Type: Grant
    Filed: April 7, 2004
    Date of Patent: May 24, 2011
    Assignee: Evolium S.A.S.
    Inventors: Hirotoshi Satou, Masao Otsuka, Koji Matsushita, Sachiko Naito, Hiroshi Tomozawa
  • Patent number: 7566762
    Abstract: The present invention relates to a process for preparing a fluoropolymer containing at least one kind of fluoroolefin, which comprises carrying out polymerization in the presence of a surfactant represented by the formula (1): (wherein R1 and R2 may be the same or different respectively, and represent an alkyl group or an alkenyl group, R3 is a hydrogen atom, an alkyl group or an alkenyl group, the total carbon number of R1 to R3 is 2 to 25, L? is a group represented by —SO3?, —OSO3?, —PO3?, —OPO3? or —COO?, and M+ is a monovalent cation). Thereby, polymerization can be carried out with excellent production efficiency in the presence of a small amount of a surfactant, and a fluoropolymer can be prepared without lowering various physical properties such as water resistance by the surfactant.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: July 28, 2009
    Assignee: Daikin Industries, Ltd.
    Inventors: Masao Otsuka, Satoshi Tokuno, Katsuya Nakai
  • Publication number: 20070149733
    Abstract: The present invention relates to a process for preparing a fluoropolymer containing at least one kind of fluoroolefin, which comprises carrying out polymerization in the presence of a surfactant represented by the formula (1): (wherein R1 and R2 may be the same or different respectively, and represent an alkyl group or an alkenyl group, R3 is a hydrogen atom, an alkyl group or an alkenyl group, the total carbon number of R1 to R3 is 2 to 25, L? is a group represented by —SO3?, —OSO3?, —PO3?, —OPO3? or —COO?, and M+ is a monovalent cation). Thereby, polymerization can be carried out with excellent production efficiency in the presence of a small amount of a surfactant, and a fluoropolymer can be prepared without lowering various physical properties such as water resistance by the surfactant.
    Type: Application
    Filed: December 22, 2004
    Publication date: June 28, 2007
    Inventors: Masao Otsuka, Satoshi Tokuno, Katsuya Nakai
  • Patent number: 6963015
    Abstract: The present invention provides an ethylene-hexafluoropropylene copolymer which is suitable as a hose or seal for engine oil of an automobile and has sufficient amine resistance, while maintaining heat resistance, oil resistance and chemical resistance close to that of conventional fluorine rubber. The ethylene-hexafluoropropylene copolymer comprises 35 to 60% by mole of ethylene structural unit, 25 to 50% by mole of hexafluoropropylene structural unit and 0 to 15% by mole of structural unit derived from a monomer copolymerizable therewith and has a fluorine content of at least 60% by weight and number average molecular weight of 3,000 to 500,000.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: November 8, 2005
    Assignee: Daikin Industries, LTD
    Inventors: Masao Otsuka, Mitsuo Tsukamoto, Mitsuhiro Otani, Tatsuya Morikawa, Hideya Saito
  • Patent number: 6858763
    Abstract: The present invention relates to a process for preparing an elastomeric ethylene-hexafluoropropylene copolymer with excellent vulcanization properties, which comprises emulsion polymerizing ethylene, hexafluoropropylene and when in demand, a monomer copolymerizable therewith in a aqueous medium at a low temperature of ?20° C. to 40° C. using a radical polymerization initiator.
    Type: Grant
    Filed: September 19, 2001
    Date of Patent: February 22, 2005
    Assignee: Daikin Industries, Ltd.
    Inventors: Mitsuo Tsukamoto, Masao Otsuka, Mitsuhiro Otani, Tatsuya Morikawa, Hideya Saito
  • Publication number: 20040224673
    Abstract: To provide a mobile communication system which can distribute area information from a radio Node to a mobile terminal in a unit of cell. A mobile communication system comprising: a radio Node having a plurality of cells; host apparatus connected to the radio Node so as to be able to communicate information with the radio Node; and a mobile terminal receiving information distributed from the radio Node, wherein area information different for each cell is distributed from the radio Node to the mobile terminals 40 existing in the cell included in the radio Node, the area information is transmitted, together with control information including type information added according to a content of the area information, from the host apparatus to the radio Node, and the cell to be distributed with the information is determined based on the type information.
    Type: Application
    Filed: April 7, 2004
    Publication date: November 11, 2004
    Applicant: EVOLIUM S.A.S.
    Inventors: Hirotoshi Satou, Masao Otsuka, Koji Matsushita, Sachiko Naito, Hiroshi Tomozawa
  • Publication number: 20040214973
    Abstract: According to the present invention, ethylene, HFP and when in demand, a monomer copolymerizable therewith can be emulsion polymerized at a low temperature of −20° C. to 40° C. at a high polymerization rate. Furthermore, the obtained elastomeric E-HFP copolymer has few branches and is excellent in processability.
    Type: Application
    Filed: March 27, 2003
    Publication date: October 28, 2004
    Inventors: Mitsuo Tsukamoto, Masao Otsuka, Mitsuhiro Otani, Tatsuya Morikawa, Hideya Saito
  • Publication number: 20040030049
    Abstract: The present invention provides an ethylene-hexafluoropropylene copolymer which is suitable as a hose or seal for engine oil of an automobile and has sufficient amine resistance, while maintaining heat resistance, oil resistance and chemical resistance close to that of conventional fluorine rubber. The ethylene-hexafluoropropylene copolymer comprises 35 to 60% by mole of ethylene structural unit, 25 to 50% by mole of hexafluoropropylene structural unit and 0 to 15% by mole of structural unit derived from a monomer copolymerizable therewith and has a fluorine content of at least 60% by weight and number average molecular weight of 3,000 to 500,000.
    Type: Application
    Filed: March 27, 2003
    Publication date: February 12, 2004
    Inventors: Masao Otsuka, Mitsuo Tsukamoto, Mitsuhiro Otani, Tatsuya Morikawa, Hideya Saito
  • Patent number: 6164643
    Abstract: A paper path is provided with a paper guide for guiding paper, an oblique roller for obliquely moving the paper toward the paper guide and an electromagnetic clutch allowing and interrupting transmission of a rotating force to the oblique roller. Sensors for detecting the paper are provided upstream and downstream of the oblique roller. Also provided in the paper path is a controller which controls the electromagnetic clutch in accordance with paper sensing operation of the sensors to drive the oblique roller while the paper is passing under the oblique roller. A low-friction paper guiding surface is formed on the paper guide by coating it with a fluoroplastic.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: December 26, 2000
    Assignee: Kyocera Mita Corporation
    Inventor: Masao Otsuka
  • Patent number: 6038218
    Abstract: For each of a plurality of signal processors accommodating respective shares of signalling links to be controlled by a signalling point, a congestion-condition level is determined by comparing an overload condition of a central controller and the number of processed signals with their respective threshold values. Any signalling link, whose priority is lower than the priority corresponding to the determined congestion-condition level, is inhibited for use, and a signalling link accommodated in another signal processor is substituted for the inhibited signalling link. In determining the congestion-condition level, a decision is made at predetermined intervals of time as to whether the condition is a congested condition or a congestion cleared condition; if it is a congested condition, the congestion-condition level is raised, and if it is a congestion cleared condition, the congestion-condition level is lowered.
    Type: Grant
    Filed: August 29, 1996
    Date of Patent: March 14, 2000
    Assignee: Fujitsu Limited
    Inventors: Masao Otsuka, Hirokazu Iwakura
  • Patent number: 5915683
    Abstract: The present invention relates to an air suction type paper feeding device that includes at least one rib 5 formed on a paper supply table, the rib slightly lifting papers P such that the bottommost paper is less likely to be retained by static electricity. The invention also relates to a jogging plate disposed at a rear end of the paper supply table which has an inclined portion which urges the uppermost papers on the paper supply table towards an air supply means. The jogging plate is further formed with an arcuate portion which diverts air from the air supply means downward against a rear end portion of the paper on the paper supply table. The present invention further relates to a paper feeding belt 3 having air permeability disposed above stacked papers on the paper supply table. A vacuum manifold is disposed between portions of the feeding belt 3 to provide vacuum to lift papers. The vacuum manifold is formed with a plurality of suction ports a, b, c.
    Type: Grant
    Filed: February 17, 1998
    Date of Patent: June 29, 1999
    Assignee: Mita Industrial Co., Ltd.
    Inventor: Masao Otsuka
  • Patent number: 5769409
    Abstract: Paper regulating mechanism in a paper feed cassette for accomodating paper sheets, has: a regulation guide plate disposed below a bottom plate, on which are placed the paper sheets, and formed with a slit having a predetermined width; upper plate-shaped portions against which the paper sheets come into abutment; lower guided portions disposed at the lower ends of said upper plate-shaped portions and so loosely fitted in said slit as to easily move; rollers connected to said upper plate-shaped portions or said lower guided portions and rotatably abutting against said regulating guide plate; and lock members for fixing said upper plate-shaped portions in arbitrary positions with respect to said regulation guide plate.
    Type: Grant
    Filed: May 15, 1996
    Date of Patent: June 23, 1998
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Yasuhiro Nakamatsu, Masao Otsuka, Fumio Hatanaka, Arihiro Tsunoda
  • Patent number: 5586757
    Abstract: Paper regulating mechanism in a paper feed cassette for accommodating paper sheets , has: a regulation guide plate disposed below a bottom plate, on which are placed the paper sheets, and formed with a slit having a predetermined width; upper plate-shaped portions against which the paper sheets come into abutment; lower guided portions disposed at the lower ends of said upper plate-shaped portions and so loosely fitted in said slit as to easily move; rollers connected to said upper plate-shaped portions or said lower guided portions and rotatably abutting against said regulating guide plate; and lock members for fixing said upper plate-shaped portions in arbitrary positions with respect to said regulation guide plate.
    Type: Grant
    Filed: January 12, 1995
    Date of Patent: December 24, 1996
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Yasuhiro Nakamatsu, Masao Otsuka, Fumio Hatanaka, Arihiro Tsunoda
  • Patent number: 5485247
    Abstract: A paper feeding device is capable of judging that a paper jam occurs on the basis of output from a first paper detecting switch and a second paper detecting switch. These paper detecting switches are respectively provided ahead of and behind a registration roller which feeds paper sheets to an image forming section. If the first paper detecting switch is turned on when a predetermined time has elapsed since the registration roller started to feed a paper sheet to the image forming section, it is judged that a duplicate paper feeding state has occurred where a plurality of paper sheets are simultaneously fed. If the second paper detecting switch is turned off in the case where it is judged that a duplicate paper feeding state has occurred, it is judged that a paper jam has not occurred. The registration roller is stopped so it will later be ready to feed the subsequent paper sheet.
    Type: Grant
    Filed: August 13, 1993
    Date of Patent: January 16, 1996
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Hiroki Morishita, Hiroaki Nakamura, Makoto Eki, Yoshinori Makiura, Masao Otsuka, Kazushiro Taguchi, Keiji Ban
  • Patent number: 5379996
    Abstract: In a time period from the time point where the forward end of a paper sheet fed from a pair of paper separation rollers reaches a registration roller to the time point, where the registration roller is driven, when the load torque exerted on a forward roller is not less than second regulated torque, the transmission of power to the forward roller is released by a torque limiter provided for the forward roller. In this case, therefore, the force of paper feeding produced by the pair of paper separation rollers is regulated. Consequently, a suitable force of paper feeding can be applied to the paper sheet, thereby to make it possible to regulate the paper sheet straight in the direction of paper feeding as well as to prevent the paper sheet from continuing to be fed even if the amount of deflection of the paper sheet is saturated between the pair of paper separation rollers and the registration roller to prevent the paper sheet from being wrinkled.
    Type: Grant
    Filed: December 13, 1993
    Date of Patent: January 10, 1995
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Makoto Egi, Masao Otsuka, Hiroki Morishita, Masanobu Maeshima, Junya Sasabe, Kazushiro Taguchi
  • Patent number: 5292115
    Abstract: In a time period from the time point where the forward end of a paper sheet fed from a pair of paper separation rollers reaches a registration roller to the time point where the registration roller is driven, when the load torque exerted on a forward roller is not less than second regulated torque, the transmission of power to the forward roller is released by a torque limiter provided for the forward roller. In this case, therefore, the force of paper feeding produced by the pair of paper separation rollers is regulated. Consequently, a suitable force of paper feeding can be applied to the paper sheet, thereby to make it possible to regulate the paper sheet straight in the direction of paper feeding as well as to prevent the paper sheet from continuing to be fed even if the amount of deflection of the paper sheet is saturated between the pair of paper separation rollers and the registration roller to prevent the paper sheet from being wrinkled.
    Type: Grant
    Filed: September 11, 1992
    Date of Patent: March 8, 1994
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Makoto Egi, Masao Otsuka, Morishita, Masanobu Maeshima, Junya Sasabe, Kazushiro Taguchi, Hiroshi Kubota, Kenji Oda, Masami Fuchi
  • Patent number: 5238238
    Abstract: A paper feeding cassette case in an image forming apparatus according to the present invention is so adapted that an arbitrary internal unit out of a plurality of types of internal units including at least one internal unit of a universal type having a structure in which paper sheets of a plurality of sizes requiring the switching of the printing ranges can be set can be attached thereto. In the paper feeding cassette case, detecting member mounting portions are respectively formed in different positions respectively corresponding to the types of internal units, and the detecting member and each of the detecting member mounting portions are provided with mounting member for detachably mounting the detecting member on the detecting member mounting portion.
    Type: Grant
    Filed: October 6, 1992
    Date of Patent: August 24, 1993
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Masahiro Shinohara, Hiromi Okada, Hideaki Tomita, Naoyuki Ishida, Makoto Eki, Masao Otsuka
  • Patent number: 5202728
    Abstract: An image-forming machine includes a detachably mountable process unit. The process unit has a rotatable drum having an electrostatographic material thereon, a corona discharger, a developing device and a cleaning device. The developing device includes a development housing for holding a developer, a developer applicator for applying the developer to the electrostatographic material, and an agitating device for stirring the developer in the development housing. An agitating member of the agitating device is arranged to prevent damage of the agitating device due to forces resisting agitation motion by the agitating member. The developer applicator has a sleeve member for holding a developer on its surface, and a developer regulating blade which regulates the developer layer thickness, on the surface of the sleeve member, to provide an uniform developer thickness in the width direction.
    Type: Grant
    Filed: May 2, 1989
    Date of Patent: April 13, 1993
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Masanobu Maeshima, Hiroyuki Maede, Toshihiro Sato, Masao Otsuka, Hiroaki Tsuchiya, Shigeo Koyama, Eiji Tsutsui
  • Patent number: 5183248
    Abstract: When a sheet feeding cassette (10) is mounted on an image forming apparatus or the like, a forward portion of a mounting plate (13) is urged upward so that an upper surface of the forward portion of the mounting plate (13) is brought into contact with a feed roller (11). A pair of non-slip pads (14a) and (14b) is affixed to the upper surface of the forward portion of the mounting plate (13). The non-slip pads (14a) and (14b) are members each having a plane shape of approximately L or its reversed shape and made of, for example, a rubber plate.The non-slip pads (14a) and (14b) are affixed to such a position that they do not come into direct contact with the feed roller (11). Consequently, when sheets are fed, the last sheet is not directly nipped strongly by the feed roller and the non-slip pads, to produce no buzzing noise. In addition, the non-slip pads (14a) and (14b) are in the vicinity of the feed roller (11).
    Type: Grant
    Filed: May 21, 1992
    Date of Patent: February 2, 1993
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Hiromi Okada, Masao Otsuka
  • Patent number: 4488023
    Abstract: A gas-filled switch with an improved arc extinguishing characteristics. Such gas-filled switch comprises a gas-filled casing, a pair of electrodes disposed in the casing, a conductive retaining ring which encircles at least one of the electrodes, a permanent magnet of a cylindrical configuration mounted in the retaining ring, a conductive cylindrical body disposed in one end opening of the retaining ring, and an arc-drive coil encircling the conductive cylindrical body and having one end connected to the conductive cylindrical body and other end connected to the electrode. Due to such construction, one root of an arc generated between the electrodes is moved from one electrode to the conductive cylindrical body so that the other root of the arc is subjected to the magnetic flux of the permamemt magnet while the previous one root of the arc is subjected to the magnetic flux of the arc-drive coil so as to extinguish the arc during the rotation of the arc.
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: December 11, 1984
    Assignee: Yaskawa Electric Mfg. Co., Ltd.
    Inventors: Kenichi Matsumoto, Mashakatsu Goto, Kiyoshi Yomura, Masao Otsuka, Koichi Hori, Yoshiyuki Okamura