Patents by Inventor Woo-chul Jung

Woo-chul Jung 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).

  • Publication number: 20050265746
    Abstract: An electrophotographic image forming apparatus includes a print unit that prints an image by an electrophotographic process and has a developer cartridge having a photoreceptor drum. A door opens and closes one side of the print unit to install and remove the developer cartridge. A fixing member is selectively shifted between a first position where the developer cartridge is installed and removed and a second position where the developer cartridge is fixed to the print unit by opening and closing the door.
    Type: Application
    Filed: May 27, 2005
    Publication date: December 1, 2005
    Inventors: Woo-chul Jung, Heung-sup Jeong, Se-hyun Lyu
  • Publication number: 20050095044
    Abstract: A foreign substance prevention unit use with an electro-photographic printer is installed over a waste toner injection hole such that it closes the waste toner injection hole when a photosensitive medium is separated from a main body of the electro-photographic printer, and opens the waste toner injection hole when the photosensitive medium is installed in the main body of the electro-photographic printer. The foreign substance prevention unit is formed of an elastic material.
    Type: Application
    Filed: August 30, 2004
    Publication date: May 5, 2005
    Inventors: Young-min Yoon, Byeong-hwa Ahn, Se-hyun Lyu, Woo-chul Jung
  • Patent number: 6873819
    Abstract: A wasted toner storing apparatus and a dry type electrophotographic image forming apparatus using the same. The wasted toner storing apparatus includes a wasted toner container accommodating wasted toner generated during a printing process, and a dispersing member inside the wasted toner container, dispersing the wasted toner inside the wasted toner container by rotation of the dispersing member.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: March 29, 2005
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byeong-hwa Ahn, Young-min Yoon, Woo-chul Jung
  • Publication number: 20050008390
    Abstract: Provided is an image forming apparatus, which comprises a contamination prevention member that covers a top surface of a light window with one side exposed to an outside of a main body, which prevents a contamination material, such as dust, from getting onto the light window, and which a user can recognize and remove easily.
    Type: Application
    Filed: June 30, 2004
    Publication date: January 13, 2005
    Inventors: Heung-kyu Jang, Se-hyun Lyu, Woo-chul Jung
  • Publication number: 20050002687
    Abstract: A system to replace a photosensitive unit and a transfer unit in a printer includes a frame provided in a printer body, and a locking unit which is provided in the frame and simultaneously locks and unlocks the photosensitive unit and the transfer unit that enter via an entrance of the printer body and are seated in a mounting location. The locking unit may include a rotating lever, a rotating cam, and a connection bar which connects the rotating cam to the rotating lever.
    Type: Application
    Filed: April 12, 2004
    Publication date: January 6, 2005
    Inventors: Woo-chul Jung, Heung-sup Jeong, Byeong-hwa Ahn, Kyung-shig Chung
  • Publication number: 20050002688
    Abstract: An electrophotographic includes a main frame, a photosensitive drum unit vertically detachably installed on the main frame and having a photosensitive drum on which an electrostatic latent image is formed, and an intermediate transfer unit vertically detachably installed on the main frame and having a transfer belt to which a toner image is transferred from the photosensitive drum, wherein the intermediate transfer unit is installed above the photosensitive drum unit.
    Type: Application
    Filed: April 12, 2004
    Publication date: January 6, 2005
    Inventors: Heung-sup Jeong, Se-hyun Lyu, Byeong-hwa Ahn, Woo-chul Jung, Young-min Yoon, Jae-myoung Choi, Jin-soo Lee, Heung-kyu Jang
  • Publication number: 20050002691
    Abstract: An electrophotographic printer including a pre-erasing unit. The pre-erasing unit includes a pre-erasing lamp to irradiate light, and a pre-transfer erasing lens to induce the light generated from the pre-transfer erasing lamp to the photosensitive drum, movably installed such that it moves to an erasure position at which the pre-transfer erasing lens is close to the photosensitive drum for erasure, and moves to a retracted position spaced apart from the photosensitive drum so as not to interfere therewith when the photosensitive drum unit is being mounted or dismounted. The pre-erasing unit may further include an elastic member to provide elasticity in a direction in which the pre-transfer erasing lens moves to the retracted position.
    Type: Application
    Filed: April 12, 2004
    Publication date: January 6, 2005
    Inventors: Woo-chul Jung, Heung-sup Jeong, Byeong-hwa Ahn, Se-hyun Lyu, Young-min Yoon, Jae-myoung Choi, Jin-soo Lee, Heung-kyu Jang
  • Publication number: 20050002682
    Abstract: In an electrophotographic printer including a photosensitive drum unit having a photosensitive drum, a plurality of development units each having a developing roller, an intermediate transfer unit having a transfer belt to which an image is transferred from the photosensitive drum, a waste toner storage container to store waste toner generated at the photosensitive drum unit and the intermediate transfer unit, and a sheet transport unit which finally holds the image. The electrophotographic printer also includes first through third doors provided to mount or dismount the plurality of development units, the photosensitive drum unit and intermediate transfer unit, and the waste toner storage container, respectively, and a fourth door provided to access the sheet transport unit.
    Type: Application
    Filed: April 12, 2004
    Publication date: January 6, 2005
    Inventors: Se-hyun Lyu, Heung-sup Jeong, Byeong-hwa Ahn, Woo-chul Jung, Young-min Yoon, Jae-myoung Choi, Jin-soo Lee, Heung-kyu Jang
  • Publication number: 20050002689
    Abstract: An electrophotographic includes a main frame, a photosensitive drum unit having a photosensitive drum and vertically detachably installed on the main frame, a plurality of development units each having a developing roller and detachably installed on the main frame while sliding in a horizontal direction, and a first door openably installed for mounting or dismounting the plurality of development units.
    Type: Application
    Filed: April 12, 2004
    Publication date: January 6, 2005
    Inventors: Heung-sup Jeong, Se-hyun Lyu, Jae-myoung Choi, Jin-soo Lee, Woo-chul Jung, Young-min Yoon, Heung-kyu Jang, Byeong-hwa Ahn
  • Publication number: 20040096251
    Abstract: A wasted toner storing apparatus and a dry type electrophotographic image forming apparatus using the same. The wasted toner storing apparatus includes a wasted toner container accommodating wasted toner generated during a printing process, and a dispersing member inside the wasted toner container, dispersing the wasted toner inside the wasted toner container by rotation of the dispersing member.
    Type: Application
    Filed: August 4, 2003
    Publication date: May 20, 2004
    Applicant: SAMSUNG Electronics Co. Ltd.
    Inventors: Byeong-Hwa Ahn, Young-Min Yoon, Woo-chul Jung
  • Patent number: 6694113
    Abstract: The present invention provides an ink delivery system and an ink delivery method of a liquid-type electrophotographic printer which are adapted to detect whether or not liquid in any one of containers which supply ink and a solvent to circulation tanks is exhausted without installing separate level sensors.
    Type: Grant
    Filed: February 1, 2002
    Date of Patent: February 17, 2004
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Geun-yong Park, Hyun-seong Shin, Hyong-gu Lee, Yong-su Kim, Woo-chul Jung
  • Publication number: 20020114637
    Abstract: An ink delivery system and an ink delivery method are disclosed.
    Type: Application
    Filed: February 1, 2002
    Publication date: August 22, 2002
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Geun-yong Park, Hyun-seong Shin, Hyong-gu Lee, Yong-su Kim, Woo-chul Jung
  • Patent number: 6275670
    Abstract: A liquid electrophotographic printer having topping corona devices for charging a photosensitive belt, a laser scanner for forming an electrostatic latent image on the charged photosensitive belt, and a development unit for developing the electrostatic latent image to an image having a predetermined color. The liquid electrophotographic printer includes an exhaust guide forming a movement path of air so that the air moves from places around the topping corona devices to the outside of the printer, a filter for filtering impurity contained in the air passing through the exhaust guide, and an induction pump for allowing air to flow from the places around the topping corona devices to the filter through the exhaust guide. The ozone generated around the topping corona devices can be removed, thereby preventing the environment surrounding the printer from being contaminated by the ozone.
    Type: Grant
    Filed: December 29, 1999
    Date of Patent: August 14, 2001
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Min-su Cho, Woo-chul Jung