Patents by Inventor Junji Nakajima

Junji 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).

  • Publication number: 20060194116
    Abstract: A lithium ion secondary battery includes a positive electrode capable of absorbing and desorbing lithium ion, a negative electrode capable of absorbing and desorbing lithium ion, a porous film interposed between the positive electrode and the negative electrode, and a non-aqueous electrolyte, the porous film being adhered to a surface of at least the negative electrode. The porous film includes an inorganic filler and a first binder: The content of the first binder in the porous film is 1.5 to 8 parts by weight per 100 parts by weight of the filler: The first binder includes a first rubber including an acrylonitrile unit: The first rubber is water-insoluble and has a decomposition temperature of 250° C. or higher. The negative electrode includes a negative electrode active material capable of absorbing and desorbing lithium ion and a second binder, and the second binder includes a second rubber particle and a water-soluble polymer.
    Type: Application
    Filed: September 13, 2004
    Publication date: August 31, 2006
    Inventors: Kohei Suzuki, Tsumoru Ohata, Junji Nakajima, Akiko Fujino, Shigeo Ikuta, Tetsuya Hayashi, Yusuke Fukumoto, Shinji Kasamatsu
  • Publication number: 20050266305
    Abstract: To provide a non-aqueous secondary battery having a capacity as high as that of a conventional battery using a conventional resin separator and achieving excellent overcharge characteristics and excellent resistance to external short-circuit, a combined electrode plate for a spirally-wound electrode group for a non-aqueous secondary battery including a current collector, an active material layer carried on the current collector and a multi-layer porous membrane carried on the active material layer is used. The multi-layer porous membrane includes a first porous membrane and a second porous membrane. The first porous membrane contains metal oxide particles and a first binder. The second porous membrane contains resin particles and a second binder. The thickness of the multi-layer porous membrane is preferably 15 to 25 ?m.
    Type: Application
    Filed: May 25, 2005
    Publication date: December 1, 2005
    Inventors: Tsumoru Ohata, Junji Nakajima
  • Patent number: 6951956
    Abstract: Crystalline polyglycolic acid wherein a difference between the melting point Tm and the crystallization temperature Tc2 is not lower than 35° C., and a difference between the crystallization temperature Tc1 and the glass transition temperature Tg is not lower than 40° C. A production process of polyglycolic acid modified in crystallinity, comprising applying heat history to crystalline polyglycolic acid at a temperature of not lower than (the melting point Tm of the crystalline polyglycolic acid+38° C.). A polyglycolic acid composition comprising crystalline polyglycolic acid and a heat stabilizer, wherein a difference (T2?T1) between the temperature T2 at 3%-weight loss on heating of the polyglycolic acid composition and the temperature T1 at 3%-weight loss on heating of the crystalline polyglycolic acid is not lower than 5° C.
    Type: Grant
    Filed: April 25, 2002
    Date of Patent: October 4, 2005
    Inventors: Kazuyuki Yamane, Hiromitsu Miura, Toshihiko Ono, Junji Nakajima, Daisuki Itoh
  • Publication number: 20050180277
    Abstract: There are provided an optical disk device and tilt correction processing method for performing recording/reproduction by rapidly acquiring an optimal tilt correction value for an optical disk having a plurality of recording/reproducing layers. In an optical disk device capable of recording or reproducing information by irradiating a laser beam to each of a plurality of recording/reproducing layers of an optical disk, the tilt value is stepwise set within a predetermined range at a predetermined radius position of the recording/reproducing layer located at the farthest distance from the laser beam irradiation side so that an optimal tilt correction value can be obtained from the quadratic function by the method of least squares of the jitter or the like obtained from the disk. By applying the optimal tilt value obtained to the other recording/reproducing layer, it is possible to start recording or reproduction in a short time.
    Type: Application
    Filed: August 18, 2004
    Publication date: August 18, 2005
    Applicant: Hitachi, Ltd.
    Inventors: Koji Iljima, Motoyuki Suzuki, Junji Nakajima
  • Publication number: 20050011892
    Abstract: The invention provides a multilayer container that comprises a polyglycolic acid layer and a thermoplastic polyester resin layer and is much improved in terms of gas barrier properties, heat resistance, moldability, transparency and durability, and its production process. Polyglycolic acid is used as a gas barrier resin. At the body and bottom, the thermoplastic polyester resin forms an inner and an outer layer, and an intermediate layer comprising at least one polyglycolic acid layer is embedded in the thermoplastic polyester resin layer. The opening end of the container is formed of a thermoplastic polyester resin layer alone, and the body is biaxially oriented. The multilayer container has heat resistance enough to stand up to hot-filling at 93° C. for 20 seconds.
    Type: Application
    Filed: November 1, 2002
    Publication date: January 20, 2005
    Inventors: Junji Nakajima, Takafumi Kato, Yoshihiro Matsukura
  • Publication number: 20040166407
    Abstract: A lithium ion secondary battery comprising: a positive electrode, a negative electrode, a separator interposed between the positive and negative electrodes, and an electrolyte prepared by dissolving a lithium salt in a non-aqueous solvent, wherein the separator comprises a porous film layer containing basic solid particles and a composite binder, the porous film layer is adhered to at least one surface of at least one of the positive and negative electrodes, the composite binder comprises a primary binder and a secondary binder, the primary binder comprises polyether sulfone and the secondary binder comprises polyvinylpyrrolidone.
    Type: Application
    Filed: February 9, 2004
    Publication date: August 26, 2004
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Junji Nakajima, Tsumoru Ohata, Takashi Takano, Kohei Suzuki, Tetsuya Hayashi
  • Publication number: 20040115530
    Abstract: The present invention relates to a lead-acid battery Comprising a positive and a negative electrode, each having a current collector comprising an expanded grid, characterized in that at least one of the positive electrode and the negative electrode contains an organic binder in an active material layer at an edge portion thereof.
    Type: Application
    Filed: October 21, 2003
    Publication date: June 17, 2004
    Inventors: Akihiro Maeda, Naoto Hoshihara, Junji Nakajima
  • Publication number: 20030125431
    Abstract: Crystalline polyglycolic acid wherein a difference between the melting point Tm and the crystallization temperature Tc2 is not lower than 35° C., and a difference between the crystallization temperature Tc1 and the glass transition temperature Tg is not lower than 40° C. A production process of polyglycolic acid modified in crystallinity, comprising applying heat history to crystalline polyglycolic acid at a temperature of not lower than (the melting point Tm of the crystalline polyglycolic acid+38° C.). A polyglycolic acid composition comprising crystalline polyglycolic acid and a heat stabilizer, wherein a difference (T2−T1) between the temperature T2 at 3%-weight loss on heating of the polyglycolic acid composition and the temperature T1 at 3%-weight loss on heating of the crystalline polyglycolic acid is not lower than 5° C.
    Type: Application
    Filed: April 25, 2002
    Publication date: July 3, 2003
    Inventors: Kazuyuki Yamane, Hiromitsu Miura, Toshihiko Ono, Junji Nakajima, Daisuke Itoh
  • Publication number: 20030125508
    Abstract: Crystalline polyglycolic acid wherein a difference between the melting point Tm and the crystallization temperature Tc2 is not lower than 35° C., and a difference between the crystallization temperature Tc1 and the glass transition temperature Tg is not lower than 40° C. A production process of polyglycolic acid modified in crystallinity, comprising applying heat history to crystalline polyglycolic acid at a temperature of not lower than (the melting point Tm of the crystalline polyglycolic acid+38° C.). A polyglycolic acid composition comprising crystalline polyglycolic acid and a heat stabilizer, wherein a difference (T2−T1) between the temperature T2 at 3%-weight loss on heating of the polyglycolic acid composition and the temperature T1 at 3%-weight loss on heating of the crystalline polyglycolic acid is not lower than 5° C.
    Type: Application
    Filed: November 2, 2001
    Publication date: July 3, 2003
    Inventors: Kazuyuki Yamane, Hiromitsu Miura, Toshihiko Ono, Junji Nakajima, Daisuke Itoh
  • Patent number: 6215535
    Abstract: The present invention provides a light-modulation element comprising at least: liquid crystal droplets having a particle size between 0.6 &mgr;m-2 &mgr;m, which have light-modulating functions to scatter light rays or transmit light rays and polymer matrix having an interstructure thickness of 0.5 &mgr;m or less between the liquid crystal droplets. The light-modulation element works to scatter light rays or transmit light rays by turning on a voltage or turning off a voltage. The light-modulation element is produced by a polymerization process and a mixing step to separate out liquid crystal phases in a polymer matrix.
    Type: Grant
    Filed: October 16, 1997
    Date of Patent: April 10, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Junji Nakajima, Hideaki Mochizuki, Masao Yamamoto, Hirofumi Wakemoto
  • Patent number: 5872608
    Abstract: A mixed material of liquid crystals and resin is dropped on at least one substrate in an amount greater than the amount needed to cover a display area for the LCD panel. The substrate is adhered to another substrate, and excess material is removed to the outside of a display area. The phase-separation of the liquid crystals and resin is carried out by irradiating light while pressure is added to at least one substrate, so that a liquid crystal display panel applied to a liquid crystal display device or a light shutter can be manufactured without applying a complex vacuum device.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: February 16, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuo Inoue, Tsuyoshi Uemura, Junji Nakajima
  • Patent number: 5854664
    Abstract: A mixed material of liquid crystals and resin is dropped on at least one substrate in an amount greater than the amount needed to cover a display area for the LCD panel. The substrate is adhered to another substrate, and excess material is removed to the outside of a display area. The phase-separation of the liquid crystals and resin is carried out by irradiating light while pressure is added to at least one substrate, so that a liquid crystal display panel applied to a liquid crystal display device or a light shutter can be manufactured without applying a complex vacuum device.
    Type: Grant
    Filed: September 25, 1995
    Date of Patent: December 29, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuo Inoue, Tsuyoshi Uemura, Junji Nakajima
  • Patent number: 5852484
    Abstract: A mixed material of liquid crystals and resin is dropped on at least one substrate in an amount greater than the amount needed to cover a display area for the LCD panel. The substrate is adhered to another substrate, and excess material is removed to the outside of a display area. The phase-separation of the liquid crystals and resin is carried out by irradiating light while pressure is added to at least one substrate, so that a liquid crystal display panel applied to a liquid crystal display device or a light shutter can be manufactured without applying a complex vacuum device.
    Type: Grant
    Filed: May 27, 1997
    Date of Patent: December 22, 1998
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kazuo Inoue, Tsuyoshi Uemura, Junji Nakajima
  • Patent number: 5541909
    Abstract: A masking type light control layer for decreasing its reflection factor in a high-temperature region is formed on phase pits of an optical disc, and the phase pit depth is set to a predetermined value. A light spot for reproduction is shaped to an elliptical form and two sub-flux beams on the optical disc are spaced by 5/4 track pitch from a principal flux beam in the radial direction of the optical disc. The kind of optical disc is discriminated and reproduction laser power and characteristics of an equalizer circuit are switched in accordance with the type of an optical disc. Through this, a stable servo signal detection can be ensured and repetitive reproduction characteristics can be improved.
    Type: Grant
    Filed: October 19, 1993
    Date of Patent: July 30, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Junji Nakajima, Kunikazu Ohnishi, Tooru Sasaki, Makoto Miyamoto, Masaaki Kurebayashi, Yoshio Suzuki, Masayuki Inoue, Hisamitsu Tanaka, Motoyuki Suzuki, Yukio Fukui
  • Patent number: 5519519
    Abstract: The present invention provides a light-modulation element comprising at least: liquid crystal droplets having a particle size between 0.6 .mu.m-2 .mu.m, which have light-modulating functions to scatter light rays or transmit light rays and polymer matrix having an interstructure thickness of 0.5 .mu.m or less between the liquid crystal droplets. The light-modulation element works to scatter light rays or transmit light rays by turning on a voltage or turning off a voltage. The light-modulation element is produced by a polymerization process and a mixing step to separate out liquid crystal phases in a polymer matrix.
    Type: Grant
    Filed: August 4, 1993
    Date of Patent: May 21, 1996
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Junji Nakajima, Hideaki Mochizuki, Masao Yamamoto, Hirofumi Wakemoto