Patents by Inventor Sachie Hosokoezawa

Sachie Hosokoezawa 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).

  • Image forming apparatus having charger to charge image carrier with magnetic brush
    Patent number: 5381215
    Abstract: A device for charging a photoreceptor on which a toner image is formed, comprises a rotatable sleeve, at least two magnets disposed in the sleeve so as to attract magnetic particles in a form of magnetic brush, and a electric power source to provide the photoreceptor with an electric charge through the magnetic brush. One of the magnets is disposed upstream of the closest point between the photoreceptor and the sleeve, and the other magnet is disposed downstream of the closest point.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: January 10, 1995
    Assignee: Konica Corporation
    Inventors: Satoshi Haneda, Kunio Shigeta, Sachie Hosokoezawa, Masakazu Fukuchi, Shizuo Morita, Hiroyuki Nomori
  • Image forming apparatus with charger of image carrier using magnetic brush
    Patent number: 5367365
    Abstract: An image forming machine has a charging roller on which magnetic particles are supplied to form a magnetic brush and an image forming body which is charged under the condition that the magnetic brush on the charging roller is in an alternating electric field. When the distance between a regulating member that regulates an amount of the magnetic particles passing through and the charging roller is defined to be DB and the distance between the image forming body and the charging roller is defined to be DI, an inequality of 0.7 DB.ltoreq.DI.ltoreq.1.0 DB is satisfied. More preferably, DB is in the relation of 0.2.ltoreq.DB.ltoreq.1.0 in mm.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: November 22, 1994
    Assignee: Konica Corporation
    Inventors: Satoshi Haneda, Kunio Shigeta, Sachie Hosokoezawa, Masakazu Fukuchi, Shizuo Morita, Hiroyuki Nomori
  • Magnetic brush charging device
    Patent number: 5357323
    Abstract: An image forming machine such as a copier or a printer for developing a latent image on a photoreceptor with toner. The image forming machine includes a sleeve for charging the photoreceptor; magnetic particles for forming a magnetic brush on a surface of the sleeve; a driver for driving the sleeve so that the magnetic brush is moved; and a power applying circuit for applying an alternating current between 20 and 500 .mu.A/cm on to a charging area between the sleeve and the photoreceptor; in which the sleeve is located in the vicinity of the photoreceptor so that the magnetic brush is in contact with the surface of the photoreceptor.
    Type: Grant
    Filed: October 15, 1993
    Date of Patent: October 18, 1994
    Assignee: Konica Corporation
    Inventors: Satoshi Haneda, Kunio Shigeta, Sachie Hosokoezawa, Masakazu Fukuchi, Shizuo Morita, Hiroyuki Nomori