Patents by Inventor Takanobu Nakajima

Takanobu Nakajima 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).

  • Apparatus for causing a developer powder to make an irregular motion in a developing zone
    Patent number: 4126100
    Abstract: An apparatus for developing an electrostatic latent image formed on the surface of an electrostatic latent image-bearing material by applying a powdery developer, wherein means are provided for bringing the surface of a developer-retaining member retaining a layer of the powdery developer thereon into rolling contact with the surface of the image-bearing material in such a relation that a reservoir zone of the developer is formed at least upstream of the zone of rolling contact between the two surfaces, and means are provided for physically disturbing the developer in the reservoir zone to cause the developer to make an irregular motion.
    Type: Grant
    Filed: July 26, 1977
    Date of Patent: November 21, 1978
    Assignee: Mita Industrial Company Ltd.
    Inventors: Hitoshi Nishihama, Katsuhiko Gotoda, Minoru Motomura, Takanobu Nakajima, Tatsuo Aizawa
  • Method for developing electrostatic latent images
    Patent number: 4081571
    Abstract: Method and apparatus for developing an electrostatic latent image formed on the surface of an electrostatic latent image-bearing material by applying a powdery developer, wherein the surface of a developer-retaining member retaining a layer of the powdery developer thereon is brought into rolling contact with the surface of the image-bearing material in such a relation that a reservoir zone of the developer is formed at least upstream of the zone of rolling contact between the two surfaces, and the developer in the reservoir zone is physically disturbed.
    Type: Grant
    Filed: July 29, 1975
    Date of Patent: March 28, 1978
    Assignee: Mita Industrial Co. Ltd.
    Inventors: Hitoshi Nishihama, Katsuhiko Gotoda, Minoru Motomura, Takanobu Nakajima, Tatsuo Aizawa
  • Contact heat fixing device
    Patent number: 4045165
    Abstract: A contact heat fixing device which comprises a driving heated roller having a heating mechanism disposed in the interior thereof and a surface coated with an offset preventing material, a press roller which is rotated in intimate contact under pressure with said heat roller, a vessel for containing therein an offset preventing liquid and a feed mechanism for supplying the offset preventing liquid to the heated roller from the vessel, fixation of a toner image being accomplished by the passage of a support having the toner image thereon through the nip position of the heated roller and the press roller, wherein said feed mechanism includes an applicator for applying the offset preventing liquid to the surface of the heated roller and supply means for supplying the offset preventing liquid from the vessel to the applicator, said applicator being arranged so that it can shift between a position (PI) where it has a pressing contact with said supply means and a position (P2) where it has a pressing contact with sa
    Type: Grant
    Filed: October 17, 1975
    Date of Patent: August 30, 1977
    Assignee: Mita Industrial Co., Ltd.
    Inventors: Takanobu Nakajima, Toshikazu Matsui, Tatsuo Aizawa