Patents by Inventor Yuichi Taka

Yuichi Taka 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).

  • Thermal image transfer recording medium
    Patent number: 5395676
    Abstract: A thermal image transfer recording medium is composed of a support, a thermosensitive image transfer layer formed thereon, and a back layer containing a silicone rubber and a silicone oil with a thickness of 0.001 to 0.1 .mu.m formed on the back side of the support opposite to the thermosensitive image transfer layer.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: March 7, 1995
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuichi Taka, Keishi Taniguchi
  • Thermal image transfer recording medium
    Patent number: 5250346
    Abstract: A thermal image transfer recording medium is composed of a support and a thermofusible ink layer formed on the support, with the water-content ratio of the recording medium excluding the support being in the range of 0.3 to 4.0 wt. % of the total weight of the recording medium excluding the support.
    Type: Grant
    Filed: July 31, 1991
    Date of Patent: October 5, 1993
    Assignee: Ricoh Company, Ltd.
    Inventors: Moriyasu Nagai, Yuichi Taka, Tadafumi Tatewaki, Shigeru Miyajima, Yoshihiko Hiyoshi, Youji Ide, Nobuyuki Maeda, Kumi Surizaki, Tetsuji Kunitake
  • Thermal image transfer recording medium
    Patent number: 5229189
    Abstract: A thermal image transfer recording medium is composed of a support and a thermofusible ink layer formed thereon, and the thermofusible ink layer contains as the main components a coloring agent, a wax component and a rubber elastomer component which is discontinuously dispersed in the form of layers in the thermofusible ink layer, or is composed of a first ink layer containing a wax component and a rubber elastomer and a second ink layer containing a coloring agent, a wax component and a binder resin, which is overlaid on the first ink layer.
    Type: Grant
    Filed: July 10, 1991
    Date of Patent: July 20, 1993
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshihiko Hiyoshi, Tetsuji Kunitake, Shigeru Miyajima, Yuichi Taka, Moriyasu Nagai, Tadafumi Tatewaki, Youji Ide, Nobuyuki Maeda, Kumi Surizaki
  • Ink and eraser of the ink
    Patent number: 4557618
    Abstract: Colored ink comprising a developer having a phenolic hydroxyl group, an electron-donating colorless dye which develops a color by the action of the developer, and a solvent which does not inhibit a color developing reaction. Handwriting written in this colored ink can be erased by using an eraser comprising a desensitizing compound which makes the colored electron-donating dye colorless.
    Type: Grant
    Filed: December 22, 1982
    Date of Patent: December 10, 1985
    Assignee: Pentel Kabushiki Kaisha
    Inventors: Masahiro Iwata, Yushi Miyashita, Yuichi Taka
  • Microcapsules having a wall of inorganic substance and process for the preparation thereof
    Patent number: 4268411
    Abstract: A process for preparing microcapsules comprising a core of highly viscous liquid substance encapsuled with a wall of an aggregate of finely divided silica powder, which comprises adding the highly viscous liquid substance into a powder bed of the finely divided silica powder under stirring with a cutter. The microcapsules thus obtained have such a structure that the core of highly viscous liquid substance is coated with a wall of an aggregate of the finely divided silica powder and a gelatinized layer formed between the wall and the liquid core substance.
    Type: Grant
    Filed: March 29, 1979
    Date of Patent: May 19, 1981
    Assignee: Pentel Kabushiki Kaisha
    Inventors: Masahiro Iwata, Yuichi Taka