Patents by Inventor Youichi Narui

Youichi Narui 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: 8332881
    Abstract: An optical disc apparatus capable of reducing looseness vibrations resulting from a gap between a sub-guide shaft and a bearing is provided. According to an optical disc apparatus in the present invention, both ends of the sub-guide shaft are supported by being sandwiched between a pair of support parts formed in a chassis and a pair of pressing members mounted on the chassis. The support part is formed by bending a protruding portion both protruding in an inward direction of a hole from an edge of the hole of the chassis and extending along the direction perpendicular to the sub-guide shaft.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: December 11, 2012
    Assignees: Hitachi, Ltd., Hitachi-LG Data Storage, Inc.
    Inventors: Seiichi Katou, Yoshiaki Yamauchi, Ikuo Nishida, Youichi Narui
  • Patent number: 7640558
    Abstract: Increases in the data transfer rates of optical disc drives have resulted in problems such as increases in optical disc vibrations due to higher rotation speeds or increases in heat generation due to increases in the output of motors for rotating the optical discs and in the output of laser diodes. To solve such problems, an optical pickup is provided with an air duct therein, and a space that is formed between the optical disc and a top case of a casing and that has negative pressure during rotation of the optical disc is connected to the air duct in the optical pickup via a tube, at least part of the tube being deformable. The optical pickup is cooled by the air flow through the air duct induced by pressure difference.
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: December 29, 2009
    Assignees: Hitachi, Ltd., Hitachi-LG Data Storage, Inc.
    Inventors: Nobuyuki Isoshima, Takayuki Fujimoto, Yoshiaki Yamauchi, Seiichi Katou, Ikuo Nishida, Youichi Narui
  • Publication number: 20080320507
    Abstract: An optical disc apparatus capable of reducing looseness vibrations resulting from a gap between a sub-guide shaft and a bearing is provided. According to an optical disc apparatus in the present invention, both ends of the sub-guide shaft are supported by being sandwiched between a pair of support parts formed in a chassis and a pair of pressing members mounted on the chassis. The support part is formed by bending a protruding portion both protruding in an inward direction of a hole from an edge of the hole of the chassis and extending along the direction perpendicular to the sub-guide shaft.
    Type: Application
    Filed: June 19, 2008
    Publication date: December 25, 2008
    Inventors: Seiichi Katou, Yoshiaki Yamauchi, Ikuo Nishida, Youichi Narui
  • Publication number: 20070277185
    Abstract: Increases in the data transfer rates of optical disc drives have resulted in problems such as increases in optical disc vibrations due to higher rotation speeds or increases in heat generation due to increases in the output of motors for rotating the optical discs and in the output of laser diodes. To solve such problems, an optical pickup is provided with an air duct therein, and a space that is formed between the optical disc and a top case of a casing and that has negative pressure during rotation of the optical disc is connected to the air duct in the optical pickup via a tube, at least part of the tube being deformable. The optical pickup is cooled by the air flow through the air duct induced by pressure difference.
    Type: Application
    Filed: January 29, 2007
    Publication date: November 29, 2007
    Inventors: Nobuyuki Isoshima, Takayuki Fujimoto, Yoshiaki Yamauchi, Seiichi Katou, Ikuo Nishida, Youichi Narui
  • Patent number: 5548411
    Abstract: A facsimile apparatus has a lower structure and an upper structure which is swingable between a raised open position an a lowered close position about a pivot located at a lower part of the rear end portion of the apparatus. A thermal print head is fixed to the front end portion of the upper structure. A recording medium conveyor roller is fixed to the front end portion of the lower structure. A linear image sensor and an original sheet conveyor roller are fixed to a central portion of the lower structure. The recording medium is placed on the lower structure at a position between the thermal print head and the linear image sensor.
    Type: Grant
    Filed: April 24, 1995
    Date of Patent: August 20, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Kazutaka Sato, Michihiro Watanabe, Masahisa Aoyagi, Taisaku Seino, Katsuo Ohki, Hiromitsu Fukuda, Hideyuki Kawase, Kimio Oga, Akira Shimizu, Youichi Narui, Tsuguo Suzuki, Yasuo Otsuka, Kazutoshi Konno
  • Patent number: 5452098
    Abstract: A facsimile apparatus has a lower structure and an upper structure which is swingable between a raised open position an a lowered closed position about a pivot located at a lower part of the rear end portion of the apparatus. A thermal print head is fixed to the front end portion of the upper structure. A recording medium conveyor roller is fixed to the front end portion of the lower structure. A linear image sensor and an original sheet conveyor roller are fixed to a central portion of the lower structure. The recording medium is placed on the lower structure at a position between the thermal print head and the linear image sensor.
    Type: Grant
    Filed: March 25, 1993
    Date of Patent: September 19, 1995
    Assignee: Hitachi, Ltd.
    Inventors: Kazutaka Sato, Michihiro Watanabe, Masahisa Aoyagi, Taisaku Seino, Katsuo Ohki, Hiromitsu Fukuda, Hideyuki Kawase, Kimio Oga, Akira Shimizu, Youichi Narui, Tsuguo Suzuki, Yasuo Otsuka, Kazutoshi Konno
  • Patent number: 5168287
    Abstract: A thermal transfer recording apparatus wherein printing on record paper is performed with the record paper fixed on a platen roller is constituted such that, when the record paper is to be fixed, transmission of power to the platen roller is interrupted and the platen roller is fixedly held at a predetermined position, which enables realization of a transporting system for a transport system of a thermal transfer recording apparatus of the record paper fixing type which system includes a single motor therein.
    Type: Grant
    Filed: January 9, 1991
    Date of Patent: December 1, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Seiji Okunomiya, Youichi Narui, Masami Takada, Naohiro Ozawa
  • Patent number: 5092698
    Abstract: A platen roller apparatus having a cylindrical platen roller, a recording sheet retaining member capable of moving while being maintained in parallel with the axis of the platen roller, a positioning member for positioning a recording sheet on the platen roller; and members for urging the recording sheet retaining member inwardly in the radial direction of the platen roller. The recording sheet is retained while being pinched between the outer circumferential surface of the platen roller and the recording sheet retaining member.
    Type: Grant
    Filed: April 17, 1990
    Date of Patent: March 3, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Youichi Narui, Seiji Okunomiya, Masami Takada
  • Patent number: 5079565
    Abstract: A thermal transfer printing apparatus includes a reading device for reading a code registered section provided on an ink sheet cassette, and a color discrimination device, a part of which is provided on a thermal head. The apparatus acts to heat an ink sheet superposed on a print paper by means of the thermal head to print an image on the print paper. The ink sheet cassette includes a pair of ink shafts on which both ends of a continuous ink sheet having a continuous film or paper with inks applied thereon are wound, and a cassette case in which the ink shafts are received, at least one of the ink shafts being adapted to be drivingly connected in the axial direction to a torque supply shaft inserted from the outside of the cassette case so that driving torque is supplied from the torque supply shaft to the ink shaft.
    Type: Grant
    Filed: September 27, 1989
    Date of Patent: January 7, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Shimizu, Naohiro Ozawa, Toshihiko Gotoh, Kentaro Hamma, Seiji Okunomiya, Youichi Narui