Patents by Inventor Isao Nakajima

Isao Nakajima 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: 6136049
    Abstract: The present invention provides diesel fuel oil composition comprising a base fuel which contains normal paraffin compounds having a carbon number of 20 or more 4.0 wt % or less, has a specific carbon number distribution in the high-boiling normal paraffin compounds, contains sulfur at 0.05 wt % or less, and is incorporated with 0.01 to 0.1 wt % of a FI.
    Type: Grant
    Filed: May 7, 1999
    Date of Patent: October 24, 2000
    Assignee: Tonen Corporation
    Inventors: Isao Nakajima, Takashi Hino
  • Patent number: 6136050
    Abstract: The present invention provides a diesel fuel oil composition comprising a base fuel which contains normal paraffin compounds having a carbon number of 20 or more at 4.0 wt % or less, has a specific carbon number distribution in the high-boiling normal paraffin compounds, contains sulfur at 0.05 wt % or less, and is incorporated with 0.01 to 0.1 wt % of an FI and 0.002 to 0.1 wt % of lubricity improver.
    Type: Grant
    Filed: May 7, 1999
    Date of Patent: October 24, 2000
    Assignee: Tonen Corporation
    Inventors: Isao Nakajima, Kazuyuki Murakami, Takashi Hino
  • Patent number: 6130408
    Abstract: A heating belt is laid along a conveying path for a recording medium moved after development, a halogen lamp is incorporated in a belt drive roller for driving the heating belt so as to heat the heating belt by heat generated by the halogen lamp, and accordingly, the heating belt whose temperature is controlled at a predetermined temperature heats the recording sheet. With this arrangement, the conveying speed of the recording sheet and the moving speed of the heating belt are set to be equal to each other. Alternatively, the heating belt may itself generate heat.
    Type: Grant
    Filed: February 4, 1998
    Date of Patent: October 10, 2000
    Assignees: Hitachi, Ltd., Hitachi Koki Co., Ltd.
    Inventors: Hiromitsu Fukuda, Hidefumi Ohtsuka, Chikara Hiraoka, Shuho Yokokawa, Isao Nakajima, Yoji Hirose, Akihiko Yamazaki
  • Patent number: 6104907
    Abstract: There is provided an image recording apparatus which does not cause a print shift or a color drift caused by vibration and a widthwise shift due to speed variation in a conveying direction of a continuous sheet such as rolled paper or folded paper, in which a variation in speed is prevented by rollers which wind and clamp the sheet on and between an upper and a lower roller which are driven by the conveying force of the sheet, so as to prevent occurrence of vibration in the conveying direction, and a guide roller having pins adapted to be engaged in sprocket holes of the sheet are provided between the set-up positions of the tractors.
    Type: Grant
    Filed: April 27, 1998
    Date of Patent: August 15, 2000
    Assignees: Hitachi, Ltd., Hitachi Koki Co., Ltd.
    Inventors: Shigeru Obata, Hidefumi Ohtsuka, Shuho Yokokawa, Isao Nakajima, Akitomo Kuwabara
  • Patent number: 6028269
    Abstract: A composite insulator includes a hollow and tapered core portion composed of fiber-reinforced plastics, and a sheath and sheds composed of an insulating polymeric material integrally molded on the outer surface of the core portion. The core portions of composite insulators for a plurality of voltage classes are formed by using a mandrel assembly in which a plurality of mandrel members are combined. The so-prepared core portion is placed within a mold unit in accordance with the voltage class of the composite insulator to be manufactured, and the insulating polymeric material is poured into the mold cavity to integrally mold the sheath and the sheds.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 22, 2000
    Assignee: NGK Insulators, Ltd.
    Inventors: Shigehiko Kunieda, Isao Nakajima, Yusuke Utsumi
  • Patent number: 5961864
    Abstract: A toner image heating device for heating a recording material holding a toner image includes: a first heating roller having a plurality of heaters which are different in heat generating region from one another; and a second heating roller having a plurality of heaters which are different in heat generating region from one another. A heat generating region dividing position between said heaters adjacent to each other in said second heating roller is shifted from a heat generating region dividing position between said heaters adjacent to each other in said first heating roller.
    Type: Grant
    Filed: May 5, 1998
    Date of Patent: October 5, 1999
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Isao Nakajima, Akihiko Yamazaki, Akitomo Kuwabara, Yoji Hirose, Hidefumi Ohtsuka, Hiromitsu Fukuda
  • Patent number: 5855553
    Abstract: A remote surgery supporting system and a method thereof produces a presentation of realism control data generated by realism control data generating means 101 from image data obtained from work environment data detecting means 104 and measurement data processing means 118 and from force and proximity data. While viewing this presentation, the surgical operator inputs actions through action command inputting means 114 and thereafter, diseased tissue manipulating means 102 executes a procedure on diseased part 125. The manipulation force of each surgical operator received from manipulation command generating means 103 and force reflection from the diseased part 125 are combined and presented to the action command inputting means 114. Thereby, a plurality of surgical operators can perform a surgerical operation while viewing the realism control data and sensing the manipulation force of other surgical operators and the force reflection from the diseased part.
    Type: Grant
    Filed: February 16, 1996
    Date of Patent: January 5, 1999
    Assignee: Hitchi, Ltd.
    Inventors: Fujio Tajima, Masakatsu Fujie, Isao Nakajima, Hiroshi Takeuchi, Toshihiko Wada
  • Patent number: 5834110
    Abstract: An excellent polymer insulator is provided which can be formed by casting a composition in a mold and which after heat-curing have a silicone rubber coating layer on an outer circumferential surface of a glass fiber-reinforced plastics core thereby providing superior electric insulation properties including weather resistance, tracking resistance and erosion resistance, etc. in severe conditions of air pollution, salt damaging or severe climate.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: November 10, 1998
    Assignee: NGK Insulators, Ltd.
    Inventors: Hidenobu Misawa, Yukihiro Koshino, Isao Nakajima
  • Patent number: 5818496
    Abstract: An exposure device of an electrophotographic apparatus which includes a rotary polyhedral mirror for scanning a plurality of laser beams on a photosensitive body, a beam interval adjusting member for adjusting an interval between the laser beams, a rotating mechanism for rotating the beam interval adjusting member, and an optical path position deciding device disposed on the side of the rotary polyhedral mirror in a laser beam advancing direction at the time of adjustment of the laser beam interval, the beam interval adjusting member being rotated so that the optical paths of the laser beams are decided by the optical path position deciding device. The optical path position deciding device may include a plate-like member with boresights or a CCD sensor and a CRT display.
    Type: Grant
    Filed: July 14, 1995
    Date of Patent: October 6, 1998
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Youji Hirose, Yasuyuki Tsuji, Shuuho Yokokawa, Kunitomo Takahashi, Isao Nakajima, Muneyoshi Akai, Satoshi Aita, Sho Sawahata, Shigeo Nemoto, Yukio Otome, Katsuhito Komoda, Keiji Kataoka, Kazuhiro Akatsu
  • Patent number: 5802444
    Abstract: An electrophotographic apparatus is provided in which toner stick hardly occurs by improving the cooling effect on the strip of paper sheets after they are heat-fixed. This electrophotographic apparatus includes a fixing unit for heating toner transferred on a continuous strip of paper sheets and fixing the toner, and a folding unit for supplying a folding force to the continuous strip of paper sheets. A conveyer unit is arranged in the back stage of the electrophotographic apparatus for transferring the continuous strip of paper sheets, received from folding unit, in the horizontal direction.
    Type: Grant
    Filed: May 5, 1997
    Date of Patent: September 1, 1998
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Youichi Takeuchi, Akihiko Yamazaki, Shuho Yokokawa, Kunitomo Takahashi, Isao Nakajima, Kazuhiro Shimojima, Shinya Yamazaki, Tomomichi Kawashima
  • Patent number: 5774777
    Abstract: An image forming apparatus includes a feed roller mechanism disposed downstream of a transfer corotron 412 constituting a transfer section and composed of driven rollers 506 located on both edges of a continuous recording medium 100 which are outside an image transfer area and a drive roller 508 extending over the whole width of the continuous recording medium 100, so that when transferring a toner image from an image recording member 402, on which the toner image is to be formed, to the continuous recording medium 100, friction by the rollers achieves reliable conveyance against an attraction between the image recording member 402 and the continuous recording medium 100 without disturbing an unfixed image on the continuous recording medium 100.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: June 30, 1998
    Assignees: Hitachi, Ltd., Hitachi Koki Co., Ltd.
    Inventors: Hidefumi Ohtsuka, Shigeru Obata, Junichi Matsuno, Yasuyuki Tsuji, Shuho Yokokawa, Isao Nakajima, Muneyoshi Akai, Yoji Hirose
  • Patent number: 5702731
    Abstract: A composite insulator-producing lateral type molding apparatus includes a mold body constituted by a first molding unit and a second molding unit, each of said first and second molding units being provided, at an inner peripheral face, with recesses for the formation of a housing constituted by a plurality of shed portions and a axial portion connecting these shed portions, means for opening or tightening the first molding unit and the second molding unit, a pouring passage for pouring a housing-forming material into said recesses, and housing-forming material escape holes. A core member of the insulator is placed between the first and second molding units, the first and second molds are tightened, and the housing-forming material is poured into said recesses to form the housing. The first molding unit and the second molding unit extend laterally, and that the core member is laterally arranged horizontally between first and second molding units.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: December 30, 1997
    Assignee: NGK Insulators, Ltd.
    Inventors: Koji Hayakawa, Isao Nakajima, Yusuke Utsumi
  • Patent number: 5652949
    Abstract: Preheating temperature of a preheating plate provided on the front side of a fixing unit can be changed using a temperature controller. In a case where a printing system to print images on both sides of a print member is constructed by arranging two electrophotographic printing apparatuses in dependent relationship, the preheating temperature of the preheating plate in the electrophotographic printing apparatus in the second stage is changed to a low temperature to prevent the toner image fixed in the electrophotographic printing apparatus in the first stage from softening.
    Type: Grant
    Filed: June 26, 1996
    Date of Patent: July 29, 1997
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hiroyuki Ogawa, Shuho Yokokawa, Hiroshi Hakuta, Takao Chikuzenya, Isao Nakajima, Hiroshi Ueno
  • Patent number: 5648132
    Abstract: A composite insulator having a core member and a housing member integrally arranged around the core member, the housing member being constructed by a trunk portion and a shed portion, has a creepable distance extending means arranged on a lower plane of the shed portion. Moreover, a segment used for producing the composite insulator has a pair of segment molds detachably connected at a partition plane having a through-hole at its center portion through which the core member is arranged, an upper plane forming portion arranged at its one end surface for defining an upper plane of the shed portion, and a lower plane forming portion arranged at its other end surface for defining a lower plane of the shed portion; and a partition for forming the creepage distance extending means arranged at the lower plane forming portion.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: July 15, 1997
    Assignee: NGK Insulators, Ltd.
    Inventors: Tetsuhiko Abe, Shigehiko Kunieda, Isao Nakajima, Yusuke Utsumi
  • Patent number: 5607702
    Abstract: A segment used for producing a composite insulator having a core member and a housing member arranged around the core member and constructed by a trunk portion and a shed portion is disclosed. The segment has a pair of segment molds detachably connected at a partition plane and a heating and cooling passage arranged in the segment molds respectively. The segment molds have a through-hole through which the core member is arranged, an upper plane forming portion arranged at its one end surface for defining an upper plane of the shed portion, and a lower plane forming portion arranged at its other end surface for defining a lower plane of the shed portion. A heating or cooling medium is passed through the heating and cooling passage. Moreover, a mold is constructed by integrating a plurality of segments with the heating and cooling passage mentioned above.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: March 4, 1997
    Assignee: NGK Insulators, Ltd.
    Inventors: Koji Hayakawa, Isao Nakajima, Yusuke Utsumi
  • Patent number: 5578819
    Abstract: A simple optical recorder which permits alignment of scanning positions of a plurality of laser beams with high accuracy and effects optical recording using the laser beams. The optical recorder is provided with a photosensitive drum which is scanned by a plurality of laser beams formed in rows at an inclined angle with respect to the direction of scan, a single photosensor for sensing each of the sweep positions of the laser beams, and a controller for controlling the scanning positions of the laser beams on the basis of a sensing result of the sensor. The controller is made up of an optical sensing signal separation circuit, synchronous clock generation circuits, FIFO memory circuit elements, and OR circuits.
    Type: Grant
    Filed: June 22, 1995
    Date of Patent: November 26, 1996
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Keiji Kataoka, Susumu Saito, Shuuho Yokokawa, Satoshi Aita, Muneyoshi Akai, Shigeo Nemoto, Isao Nakajima, Hitomi Shimizu, Kunitomo Takahashi, Youji Hirose
  • Patent number: 5572290
    Abstract: An electrophotographic apparatus system or an electrophotographic apparatus provided according to the present invention has the discrepancy of printing speed between tandem and single printing removed. The electrophotographic apparatus system or the electrophotographic apparatus is provided with printing speed changeover means 23a, 23b, 24 not only to select a printing speed applicable for the case where printing is effected with a plurality of electrophotographic apparatus A, B operatively linked together and another printing speed serviceable for the case where printing is implemented with each of plural electrophotographic apparatus put into separate run independently of one another, but also to shift the printing speeds from one to another, whereby the electrophotographic apparatus system or the electrophotographic apparatus may provide normal performance in each of the respective formations of printing.
    Type: Grant
    Filed: August 3, 1995
    Date of Patent: November 5, 1996
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hiroshi Ueno, Yasuyuki Tsuji, Shuuho Yokokawa, Kunitomo Takahashi, Isao Nakajima, Youji Hirose, Kazuo Takano, Takehiro Honda, Satoshi Aita, Isao Watanabe, Koji Doi, Tsukasa Onose, Syou Sawahata
  • Patent number: 5557386
    Abstract: A toner recovering device for an electrophotographic apparatus, which includes: a dust collector connected to a device for cleaning untransferred toner remaining on a photosensitive body; a toner recovering filter having an inlet port for introducing an air-toner mixture from the dust collector side and an exhaust port for filtering the air-toner mixture and discharging the air from which the toner has been removed; a filter mounting section for mounting the toner recovering filter; a joint mechanism having a joint and a hose member, one end of the hose member capable of being connected to the dust collector and other end thereof being joint, the joint being disposed at the inlet port, the joint mechanism being arranged in the filter mounting section in such a manner as to be opened and closed; a detector for sensing that the toner recovering filter has been mounted or not onto the filter mounting section; and a pulling member for coupling the inlet port of the toner recovering filter to the joint in synchron
    Type: Grant
    Filed: November 16, 1995
    Date of Patent: September 17, 1996
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Yuuji Meguro, Shuho Yokokawa, Isao Nakajima, Tsukasa Onose, Hiroshi Ueno
  • Patent number: 5519080
    Abstract: An insulator includes a housing portion. The housing portion is composed a silicone rubber obtained by curing a composition containing diorganopolysiloxane (A) and a fine silicon powder (B) by heating, and a methylalkylpolysiloxane oil (C). The diorganopolysiloxane has at least two silicon atom-bonded alkenyl groups in one molecule. The methylalkyl-polysiloxane oil (C) has each of both terminal ends of each molecular chain blocked with a trialkysiloxy group and possessing a viscosity at 25.degree. C. being 1 to 1,000 centistokes, and is incorporated into the above composition in an amount of 1-100 parts by weight per 100 parts by weight of the component (A).
    Type: Grant
    Filed: August 10, 1994
    Date of Patent: May 21, 1996
    Assignees: Dow Corning Toray Silicone Co., Ltd., NGK Insulators Ltd.
    Inventors: Takao Matsushita, Katsuya Baba, Kazuo Hirai, Isao Nakajima, Takayuki Takeda
  • Patent number: 5453820
    Abstract: A developing device for use in an electrophotographic apparatus includes a casing for storing a developer including a toner and a carrier therein; a photosensitive drum having a surface on which an electrostatic latent image is formed; a carrying magnetic roll for drawing up the developer stored in said casing; a developing magnetic roll for forming a magnetic brush out of the developer fed by the carrying magnetic roll to develop the electrostatic latent image; and a developer mixing chamber including an impeller interposed between the carrying and developing magnetic rolls, for mixing the toner and carrier contained in the developer with each other, which is drawn up by the carrying magnetic roll, to supply the mixed developer to the developing magnetic roll.
    Type: Grant
    Filed: November 19, 1993
    Date of Patent: September 26, 1995
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Hiroshi Ueno, Yasuyuki Tsuji, Shuuho Yokokawa, Isao Nakajima, Tsukasa Onose, Yoshio Ogura, Katsuhiro Shinohara