Patents by Inventor Tatsuki Hirano

Tatsuki Hirano 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: 8973253
    Abstract: The object of the invention is to provide a method and an apparatus that allow production of metal plate chip resistors having a relatively low resistance with high accuracy and yield through simple process. The object is achieved by apparatus for manufacturing metal plate chip resistors including cutting mold for cutting intermediate product strip transversely to obtain worked product chip, ohm meter for measuring the resistance of the worked product chip, control device having a calculating part for performing a calculation using the resistance measured by the ohm meter to work out a width in which the strip is to be cut transversely so as to obtain a worked product chip of a desired resistance, and cutting width adjustor for making an adjustment so that the strip is to be cut transversely in the width obtained from the calculating part.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: March 10, 2015
    Assignee: Kamaya Electric Co., Ltd.
    Inventors: Tatsuki Hirano, Kazuo Tanaka
  • Publication number: 20140059838
    Abstract: The object of the invention is to provide a method and an apparatus that allow production of metal plate chip resistors having a relatively low resistance with high accuracy and yield through simple process. The object is achieved by apparatus for manufacturing metal plate chip resistors including cutting mold for cutting intermediate product strip transversely to obtain worked product chip, ohm meter for measuring the resistance of the worked product chip, control device having a calculating part for performing a calculation using the resistance measured by the ohm meter to work out a width in which the strip is to be cut transversely so as to obtain a worked product chip of a desired resistance, and cutting width adjustor for making an adjustment so that the strip is to be cut transversely in the width obtained from the calculating part.
    Type: Application
    Filed: November 8, 2013
    Publication date: March 6, 2014
    Applicant: KAMAYA ELECTRIC CO., LTD.
    Inventors: Tatsuki Hirano, Kazuo Tanaka
  • Patent number: 8590141
    Abstract: The object of the invention is to provide a method and an apparatus that allow production of metal plate chip resistors having a relatively low resistance with high accuracy and yield through simple process. The object is achieved by apparatus 10 for manufacturing metal plate chip resistors including cutting mold 21 for cutting intermediate product strip 14 transversely to obtain worked product chip 16a, ohm meter 22 for measuring the resistance of the worked product chip 16a, control device 23 having a calculating part for performing a calculation using the resistance measured by the ohm meter 22 to work out a width in which the strip 14 is to be cut transversely so as to obtain a worked product chip of a desired resistance, and cutting width adjusting means 26, 27 for making an adjustment so that the strip 14 is to be cut transversely in the width obtained from the calculating part.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: November 26, 2013
    Assignee: Kamaya Electric Co., Ltd.
    Inventors: Tatsuki Hirano, Kazuo Tanaka
  • Publication number: 20110283522
    Abstract: The object of the invention is to provide a method and an apparatus that allow production of metal plate chip resistors having a relatively low resistance with high accuracy and yield through simple process. The object is achieved by apparatus 10 for manufacturing metal plate chip resistors including cutting mold 21 for cutting intermediate product strip 14 transversely to obtain worked product chip 16a, ohm meter 22 for measuring the resistance of the worked product chip 16a, control device 23 having a calculating part for performing a calculation using the resistance measured by the ohm meter 22 to work out a width in which the strip 14 is to be cut transversely so as to obtain a worked product chip of a desired resistance, and cutting width adjusting means 26, 27 for making an adjustment so that the strip 14 is to be cut transversely in the width obtained from the calculating part.
    Type: Application
    Filed: August 2, 2011
    Publication date: November 24, 2011
    Applicant: Kamaya Electric Co., Ltd.
    Inventors: Tatsuki Hirano, Kazuo Tanaka
  • Patent number: 8058968
    Abstract: A method for manufacturing rectangular plate type chip resistors and a rectangular plate type chip resistor obtained by this method. The method includes the steps of (A) providing a resistive alloy plate strip of predetermined width and thickness, (B) forming an insulating protective film of a predetermined width longitudinally along the middle of upper and lower faces of the alloy plate strip, (C) forming an electrode layer composed of integrated surface, back, and end electrodes, along both sides of the protective film by electroplating, and (D) cutting the alloy plate strip coated with the protective films and the electrode layers in step (C) transversely in predetermined lengths, wherein resistance is controlled to be within a predetermined range by adjusting the thickness of the alloy plate strip in step (A), the width of the protective film formed in step (B), and the cutting length in step (D).
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: November 15, 2011
    Assignee: Kamaya Electric Co., Ltd.
    Inventors: Tatsuki Hirano, Osamu Matsukawa
  • Publication number: 20100236054
    Abstract: The object of the invention is to provide a method and an apparatus that allow production of metal plate chip resistors having a relatively low resistance with high accuracy and yield through simple process. The object is achieved by apparatus 10 for manufacturing metal plate chip resistors including cutting mold 21 for cutting intermediate product strip 14 transversely to obtain worked product chip 16a, ohm meter 22 for measuring the resistance of the worked product chip 16a, control device 23 having a calculating part for performing a calculation using the resistance measured by the ohm meter 22 to work out a width in which the strip 14 is to be cut transversely so as to obtain a worked product chip of a desired resistance, and cutting width adjusting means 26, 27 for making an adjustment so that the strip 14 is to be cut transversely in the width obtained from the calculating part.
    Type: Application
    Filed: January 10, 2008
    Publication date: September 23, 2010
    Applicant: KAMAYA ELECTRIC CO., LTD.
    Inventors: Tatsuki Hirano, Kazuo Tanaka
  • Publication number: 20100176913
    Abstract: There is provided a method for manufacturing rectangular plate type chip resistors which provides easy and convenient control of resistance, and easy and low cost manufacture of rectangular plate type chip resistors having a reliable electrode structure, as well as a rectangular plate type chip resistor obtained by this method and having excellent properties particularly at low resistance.
    Type: Application
    Filed: May 18, 2007
    Publication date: July 15, 2010
    Inventors: Tatsuki Hirano, Osamu Matsukawa
  • Patent number: 5828123
    Abstract: A chip resistor comprising an insulated substrate, a pair of top electrodes disposed on top of said insulated substrate, a resistor film bridging said pair of top electrodes, a protective film coating said resistor film, and an end electrode and a plated electrode film which are formed on each of said pair of top electrodes, wherein each of said top electrodes includes:a first electrode section connected to said resistor film; anda second electrode section not in direct contact with said resistor film and arranged in connection to and along said first electrode section so as to extend in parallel with a portion of said first electrode section between said resistor film and said end electrode, said second electrode section having a sheet resistivity lower than that of said first electrode section.
    Type: Grant
    Filed: December 18, 1996
    Date of Patent: October 27, 1998
    Assignee: Kamaya Electric Co., Ltd.
    Inventor: Tatsuki Hirano