Patents by Inventor Yuuichi Obara

Yuuichi Obara 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 heat-fixing unit
    Patent number: 7792448
    Abstract: An image forming apparatus includes an image forming portion. The image forming apparatus further includes a fixing portion having a fixing nip portion that heats and fixes the unfixed image and an discharge roller that discharges the recording material. In the case where the recording material is a plain paper that is equal to or larger than a predetermined size, the discharge roller conveys the plain paper in a range from a front edge to a rear edge at a predetermined speed. In the case where the recording material is a plain paper smaller than the predetermined size, the discharge roller conveys the plain paper at a first speed until the rear edge passes through the fixing nip portion, and the discharge roller conveys the plain paper at a second speed higher than the first speed after the rear edge has passed through the fixing nip portion.
    Type: Grant
    Filed: June 19, 2009
    Date of Patent: September 7, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsutoshi Ando, Yuuichi Obara, Hiroshi Sahara
  • IMAGE FORMING APPARATUS HAVING HEAT-FIXING UNIT
    Publication number: 20090257768
    Abstract: An image forming apparatus includes an image forming portion; a fixing portion having a fixing nip portion which heats and fixes the unfixed image and an discharge roller which discharges the recording material, wherein in the case where the recording material is the plain paper which is equal to or larger than the predetermined size, the discharge roller conveys the plain paper in a range from a front edge to a rear edge at a predetermined speed, in the case where the recording material is the plain paper smaller than the predetermined size, the discharge roller conveys the plain paper at a first speed until the rear edge passes through the fixing nip portion, and the discharge roller conveys the plain paper at a second speed higher than the first speed after the rear edge passed through the fixing nip portion.
    Type: Application
    Filed: June 19, 2009
    Publication date: October 15, 2009
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Atsutoshi Ando, Yuuichi Obara, Hiroshi Sahara
  • Image forming apparatus having heat-fixing unit
    Patent number: 7570895
    Abstract: An image forming apparatus includes an image forming portion; a fixing portion having a fixing nip portion which heats and fixes the unfixed image and an discharge roller which discharges the recording material, wherein in the case where the recording material is the plain paper which is equal to or larger than the predetermined size, the discharge roller conveys the plain paper in a range from a front edge to a rear edge at a predetermined speed, in the case where the recording material is the plain paper smaller than the predetermined size, the discharge roller conveys the plain paper at a first speed until the rear edge passes through the fixing nip portion, and the discharge roller conveys the plain paper at a second speed higher than the first speed after the rear edge passed through the fixing nip portion.
    Type: Grant
    Filed: February 21, 2007
    Date of Patent: August 4, 2009
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsutoshi Ando, Yuuichi Obara, Hiroshi Sahara
  • IMAGE FORMING APPARATUS HAVING HEAT-FIXING UNIT
    Publication number: 20070201892
    Abstract: An image forming apparatus includes an image forming portion; a fixing portion having a fixing nip portion which heats and fixes the unfixed image and an discharge roller which discharges the recording material, wherein in the case where the recording material is the plain paper which is equal to or larger than the predetermined size, the discharge roller conveys the plain paper in a range from a front edge to a rear edge at a predetermined speed, in the case where the recording material is the plain paper smaller than the predetermined size, the discharge roller conveys the plain paper at a first speed until the rear edge passes through the fixing nip portion, and the discharge roller conveys the plain paper at a second speed higher than the first speed after the rear edge passed through the fixing nip portion.
    Type: Application
    Filed: February 21, 2007
    Publication date: August 30, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Atsutoshi Ando, Yuuichi Obara, Hiroshi Sahara