Patents by Inventor Yong-Ju Cheon

Yong-Ju Cheon 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).

  • Developing cartridge, image forming apparatus, and method of mounting/demounting developing cartridge to/from image forming apparatus
    Patent number: 8457524
    Abstract: A developing unit usable with an image forming apparatus includes a first frame to support a photoconductive medium, a second frame to support a developing member to apply a developer to the photoconductive medium, the second frame movable between a first position in which the photoconductive medium is at a developing gap from the developing member, and a second position in which the photoconductive medium is away from the developing member by a distance exceeding the developing gap, and a positioning unit to move the second frame from a current position in accordance with mounting and demounting of the developing unit to and from the image forming apparatus.
    Type: Grant
    Filed: March 21, 2008
    Date of Patent: June 4, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-ju Cheon, Joo-hwan Noh
  • Developing apparatus, image forming apparatus having the same, and assembling method of a developing apparatus
    Patent number: 7751745
    Abstract: A developing apparatus usable with an image forming apparatus includes a developer receptacle having a sidewall on which a shaft hole is formed, a rotation shaft having a length shorter than a distance between opposite sidewalls of the developer receptacle and an end on which a connection hole is formed, and a driving member rotatably supported by the shaft hole of the developer receptacle and having a connecting shaft inserted into the connection hole of the rotation shaft.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: July 6, 2010
    Assignee: Samsung Electronics Co. Ltd
    Inventors: Joo-hwan Noh, Yong-ju Cheon
  • DEVELOPING CARTRIDGE, IMAGE FORMING APPARATUS, AND METHOD OF MOUNTING/DEMOUNTING DEVELOPING CARTRIDGE TO/FROM IMAGE FORMING APPARATUS
    Publication number: 20090087218
    Abstract: A developing unit usable with an image forming apparatus includes a first frame to support a photoconductive medium, a second frame to support a developing member to apply a developer to the photoconductive medium, the second frame movable between a first position in which the photoconductive medium is at a developing gap from the developing member, and a second position in which the photoconductive medium is away from the developing member by a distance exceeding the developing gap, and a positioning unit to move the second frame from a current position in accordance with mounting and demounting of the developing unit to and from the image forming apparatus.
    Type: Application
    Filed: March 21, 2008
    Publication date: April 2, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Yong-ju Cheon, Joo-hwan Noh
  • DEVELOPING APPARATUS, IMAGE FORMING APPARATUS HAVING THE SAME, AND ASSEMBLING METHOD OF A DEVELOPING APPARATUS
    Publication number: 20090022512
    Abstract: A developing apparatus usable with an image forming apparatus includes a developer receptacle having a sidewall on which a shaft hole is formed, a rotation shaft having a length shorter than a distance between opposite sidewalls of the developer receptacle and an end on which a connection hole is formed, and a driving member rotatably supported by the shaft hole of the developer receptacle and having a connecting shaft inserted into the connection hole of the rotation shaft.
    Type: Application
    Filed: January 17, 2008
    Publication date: January 22, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Joo-hwan NOH, Yong-ju Cheon
  • Developing device for printer
    Patent number: D600276
    Type: Grant
    Filed: May 22, 2008
    Date of Patent: September 15, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joo-Hwan Noh, Yong-Ju Cheon, Jin-Hong Kim