Patents by Inventor Yuji Nakatsu

Yuji Nakatsu 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: 5837647
    Abstract: A reversible thermal recording medium having a core material capable of being change in state by heat and a recording layer including capsules containing this core material. A repeatability corresponding to the limit of possible repeated recording/erasing effected by a physical or chemical change in the material constituting the recording can be obtained. A deterioration in image quality caused by transfer of a part of the recording layer to the heating unit can be prevented and repeat characteristics can be improved, thereby limiting the running cost.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: November 17, 1998
    Assignees: Toppan Printing Co., Ltd., Mitsubishi Denki Kabushiki Kaisha
    Inventors: Niro Watanabe, Yuji Nakatsu, Keiki Yamada, Masaru Ohnishi
  • Patent number: 5837646
    Abstract: A reversible thermal recording medium having a core material capable of being change in state by heat and a recording layer including capsules containing this core material. A repeatability corresponding to the limit of possible repeated recording/erasing effected by a physical or chemical change in the material constituting the recording can be obtained. A deterioration in image quality caused by transfer of a part of the recording layer to the heating unit can be prevented and repeat characteristics can be improved, thereby limiting the running cost.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: November 17, 1998
    Assignees: Toppan Printing Co., Ltd., Mitsubishi Denki Kabushiki Kaisha
    Inventors: Niro Watanabe, Yuji Nakatsu, Keiki Yamada, Masaru Ohnishi
  • Patent number: 5837348
    Abstract: A reversible thermal recording medium having a core material capable of being change in state by heat and a recording layer including capsules containing this core material. A repeatability corresponding to the limit of possible repeated recording/erasing effected by a physical or chemical change in the material constituting the recording can be obtained. A deterioration in image quality caused by transfer of a part of the recording layer to the heating unit can be prevented and repeat characteristics can be improved, thereby limiting the running cost.
    Type: Grant
    Filed: January 13, 1997
    Date of Patent: November 17, 1998
    Assignees: Toppan Printing Co., Inc., Mitsubishi Denki Kabushiki Kaisha
    Inventors: Niro Watanabe, Yuji Nakatsu, Keiki Yamada, Masaru Ohnishi
  • Patent number: 5672559
    Abstract: A reversible thermal recording medium having a core material capable of being change in state by heat and a recording layer including capsules containing this core material. A repeatability corresponding to the limit of possible repeated recording/erasing effected by a physical or chemical change in the material constituting the recording can be obtained. A deterioration in image quality caused by transfer of a part of the recording layer to the heating unit can be prevented and repeat characteristics can be improved, thereby limiting the running cost.
    Type: Grant
    Filed: September 21, 1995
    Date of Patent: September 30, 1997
    Assignees: Toppan Printing Co., Ltd., Mitsubishi Denki Kabushiki Kaisha
    Inventors: Niro Watanabe, Yuji Nakatsu, Keiki Yamada, Masaru Ohnishi
  • Patent number: 5658845
    Abstract: A reversible thermal recording medium having a core material capable of being change in state by heat and a recording layer including capsules containing this core material. A repeatability corresponding to the limit of possible repeated recording/erasing effected by a physical or chemical change in the material constituting the recording can be obtained. A deterioration in image quality caused by transfer of a part of the recording layer to the heating unit can be prevented and repeat characteristics can be improved, thereby limiting the running cost.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: August 19, 1997
    Assignees: Toppan Printing Co., Ltd., Mitsubishi Denki Kabushiki Kaisha
    Inventors: Niro Watanabe, Yuji Nakatsu, Keiki Yamada, Masaru Ohnishi
  • Patent number: 5637551
    Abstract: A reversible thermal recording medium having a core material capable of being change in state by heat and a recording layer including capsules containing this core material. A repeatability corresponding to the limit of possible repeated recording/erasing effected by a physical or chemical change in the material constituting the recording can be obtained. A deterioration in image quality caused by transfer of a part of the recording layer to the heating unit can be prevented and repeat characteristics can be improved, thereby limiting the running cost.
    Type: Grant
    Filed: September 17, 1996
    Date of Patent: June 10, 1997
    Assignees: Toppan Printing Co., Ltd., Mitsubishi Denki Kabushiki Kaisha
    Inventors: Niro Watanabe, Yuji Nakatsu, Keiki Yamada, Masaru Ohnishi
  • Patent number: 5278129
    Abstract: A rewritable thermosensitive recording medium having a recording layer, the transparency of which reversibly changes depending on the temperature thereof. Further, the recording layer contains a matrix material and an organic low-molecular-weight material dispersed in the matrix material as main components thereof. Moreover, an alicyclic dicarboxylic acid compound is added to the organic low-molecular-weight material dispersed in the matrix material. Furthermore, by adding the alicyclic dicarboxylic acid compound to the organic low-molecular-weight material, the eutectic point of the organic low-molecular-weight material and the alicyclic dicarboxylic acid compound becomes higher than the melting point of the organic low-molecular-weight material.
    Type: Grant
    Filed: November 6, 1992
    Date of Patent: January 11, 1994
    Assignee: Toppan Printing Co., Ltd.
    Inventors: Niro Watanabe, Atsushi Kijima, Yuji Nakatsu, Susumu Watanabe