Patents by Inventor Nobutoshi Yoshida

Nobutoshi Yoshida 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: 6005585
    Abstract: A painting method for painting a plurality of regions with a plurality of colors by selecting and assigning respective colors corresponding to respective regions. The selection and assignment of colors is performed in a lump. Painting the plurality of regions with selected colors is also performed in a lump.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: December 21, 1999
    Assignees: Hitachi, Ltd., Hitachi Taga Engineering, Ltd.
    Inventors: Hiroshi Soutome, Nobutoshi Yoshida, Youichi Kawakami, Takeshi Yamamoto
  • Patent number: 4870447
    Abstract: There is a multi-color copying apparatus having image processing functions which can easily designate arbitrary areas when the trimming or masking is executed. This apparatus comprises: an area designating device to designate the first area of the original; a first developing device to develop the image of the first area in the first color; a second developing device to develop the image of the second area in the second color; and a control circuit for making the first developing device operative without making the second developing device operative in accordance with the designation of the first area and, after completion of the development of the image of the first area, making the second developing device operative without making the first developing device operative.
    Type: Grant
    Filed: January 3, 1989
    Date of Patent: September 26, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobutoshi Yoshida, Nobuyuki Miyake, Atsushi Takagi, Takashi Saito, Tadashi Suzuki, Naoyuki Ohki, Masahiro Tomosada, Hideki Adachi, Hiroaki Takeda
  • Patent number: 4862219
    Abstract: There is a multi-color copying apparatus having image processing functions which can easily designate arbitrary areas when the trimming or masking is executed. This apparatus comprises: an area designating device to designate the first area of the original; a first developing device to develop the image of the first area in the first color; a second developing device to develop the image of the second area in the second color; and a control circuit for making the first developing device operative without making the second developing device operative in accordance with the designation of the first area and, after completion of the development of the image of the first area, making the second developing device operative without making the first developing device operative.
    Type: Grant
    Filed: March 10, 1988
    Date of Patent: August 29, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobutoshi Yoshida, Nobuyuki Miyke, Atsushi Takagi, Takashi Saito, Tadashi Suzuki, Naoyuki Ohki, Masahiro Tomosada, Hideki Adachi, Hiroaki Takeda
  • Patent number: 4785330
    Abstract: A multiple image forming system for synthesizing images having different kinds of gradation characteristics of an original comprises: a latent image forming circuit for projecting a reflected light from the original onto a photo sensitive drum and forming an electrostatic latent image onto this drum; a developing unit to develop the latent image; and a control circuit to make the latent image forming circuit and the developing unit operative every gradation characteristic for the different gradation characteristic areas in the original, wherein the control circuit changes the latent image forming conditions such as an amount of exposing light to the original of the latent image forming circuit and the developing conditions such as a developing bias of the developing unit in accordance with the kind of gradation characteristic.
    Type: Grant
    Filed: October 20, 1987
    Date of Patent: November 15, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobutoshi Yoshida, Atushi Takagi
  • Patent number: 4777512
    Abstract: An image forming apparatus using two component developer. When a toner content in the developer becomes out of a predetermined range as a result of the consumption of the toner, a control device effects a toner replenishing operation, and simultaneously, the image forming operation is substantially delayed.
    Type: Grant
    Filed: December 9, 1986
    Date of Patent: October 11, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masayoshi Takahashi, Nobutoshi Yoshida, Ikumi Omura, Tatsuya Tada
  • Patent number: 4739370
    Abstract: A cleaning device which ensures perfect cleaning of the surface of an image bearing member by a cleaning device for cleaning toner remaining on the surface of the image bearing member and a cleaning roller disposed upstream of the cleaning device with respect to the direction of movement of the image bearing member and rotatable while being in contact with the surface of the image bearing member, the cleaning roller having an elastic outer layer of high hardness and an elastic inner layer of lower hardness than the outer layer.
    Type: Grant
    Filed: November 15, 1984
    Date of Patent: April 19, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventors: Nobutoshi Yoshida, Hisaaki Senba, Keishi Ohsawa, Takashi Hino
  • Patent number: 4441417
    Abstract: A fixing device for use in an image formation apparatus such as an electrophotographic copying apparatus or recording apparatus, and more particularly a fixing device in which a sheet such as paper having a toner image on the surface thereof is passed between a pair of rotatable members pressed against each other to thereby fix the toner image on the sheet. In the substance forming the surface of at least one of the pair of rotatable members, particles having a hardness higher than that of said substance are dispersed to enhance the fixativeness.
    Type: Grant
    Filed: October 27, 1981
    Date of Patent: April 10, 1984
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiro Katayama, Nobutoshi Yoshida, Tsukasa Kuge
  • Patent number: 4265531
    Abstract: Disclosed is a method for protecting a primary electrostatic latent image formed on a screen type photosensitive member. In the step for modulating ion streams or toner particle streams by the primary electrostatic latent image, due to a bias voltage impressed on the screen type photosensitive member natural corona discharge is generated by a corona discharge electrode used for forming a primary electrostatic latent image or natural discharge is generated between the photosensitive member and a conductor located close thereto so that the degradation or destruction of the primary electrostatic latent image result. The present invention provides the methods for solving this problem by electrically isolating the photosensitive member, the corona discharge electrodes and other conductors in the vicinity of the photoconductive member when a bias voltage is impressed on the latter.
    Type: Grant
    Filed: October 24, 1978
    Date of Patent: May 5, 1981
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsunobu Ohara, Nobutoshi Yoshida
  • Patent number: 4168974
    Abstract: The present invention aims at improvement in the image forming method, wherein ion current is modulated in an image form, on the basis of which a secondary electrostatic latent image is formed on a recording sheet, an insulated drum, and other recording media, and the thus formed electrostatic latent image is developed. In more detail, the entire region of such sheet and drum where such secondary electrostatic latent image is formed is uniformly charged beforehand to a desired potential, whereby the fogging phenomenon to occur at the time of development, and changes in the formed image which take place due to variations in the modulating quantity of the ion current on account of deterioration in an ion current modulating element can be prevented. Setting of the member to form thereon such secondary electrostatic latent image at a desired arbitrary potential can be done by, for example, varying the voltage to be applied to a grid provided in a corona discharger.
    Type: Grant
    Filed: March 7, 1978
    Date of Patent: September 25, 1979
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yujiro Ando, Nobutoshi Yoshida, Kazuki Tanaka, Katsunobu Ohara
  • Patent number: D294691
    Type: Grant
    Filed: December 26, 1985
    Date of Patent: March 15, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Nobutoshi Yoshida, Takao Itoh