Patents by Inventor Hirozo Funaki

Hirozo Funaki 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).

  • Toner for electrophotography
    Patent number: 4968574
    Abstract: The present invention relates to toners for electrophotography wherein the main resin component comprises a lower molecular weight polymer and a higher molecular weight polymer each of which is different from the other wherein the higher molecular weight polymer has a glass transition point of at least 50.degree. C. and the lower molecular weight polymer has a glass transition point no higher than 65.degree. C. The above polymers comprise one or more polymers selected from styrene polymers, arcylic polymers, and styrene-acrylic copolymers. Generally, the lower molecular weight polymer has a weight average molecular weight of 50,000 or less and the higher molecular weight polymer has a weight average molecular weight of 80,000 or more.
    Type: Grant
    Filed: January 9, 1986
    Date of Patent: November 6, 1990
    Assignees: Sekisui Chemical Co., Ltd., Konishiroku Photo Industry Co., Ltd.
    Inventors: Hideaki Morita, Takahira Kasuya, Goichi Yamakawa, Makoto Tomono, Hirozo Funaki, Minoru Kohara
  • Toner for developing electrostatic latent images comprising a resin having specified molecular weight parameters
    Patent number: 4486524
    Abstract: The present application relates to a novel toner for developing electrostatic latent images. The toner contains a colorant and a resin wherein the resin contains at least one particular type of polymer which has a Mw/Mn ratio of from 3.5 to 40 wherein the Mn value is about between 2,000 and 30,000.
    Type: Grant
    Filed: November 13, 1981
    Date of Patent: December 4, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yasuyuki Fujisaki, Minoru Takahashi, Hiroshi Ogawara, Hirozo Funaki, Ryubun Seimaya, Yutaka Yamada, Makoto Tomono, Noriyoshi Tarumi
  • Toner for developing electrostatic latent images
    Patent number: 4386147
    Abstract: The present invention relates to a method of fixing a toner image onto a paper bearing said image with the use of a particular toner containing a colorant and a resin wherein the resin contains at least one particular type of polymer which has a Mw/Mn ratio of about 3.5 to 40 wherein the Mn value is between about 2,000 and 30,000.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: May 31, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Ryubun Seimiya, Yutaka Yamada, Makoto Tomono, Noriyoshi Tarumi, Yasuyuki Fujisaki, Minoru Takahashi, Hiroshi Ogawara, Hirozo Funaki