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).

  • Patent number: 7540251
    Abstract: An electrolysis-type apparatus for treating ballast water using NaOCl and a method thereof is provided. The apparatus includes: a ballast tank; an electrolyzer; a first circulation pump; a second circulation pump; and a controller. The ballast tank is installed in a ship to store seawater. The electrolyzer is connected with the ballast tank and electrolyzes the seawater. The circulation pumps are installed to allow the ballast water to flow into the electrolyzer and to discharge the electrolyzed water containing NaOCl to the ballast tank. The controller supplies power to the electrolyzer so as to control an NaOCl density and controls the circulation pumps. The apparatus and the method safely treat the seawater. Thus, environment pollution and ecosystem destruction can be minimized.
    Type: Grant
    Filed: December 21, 2004
    Date of Patent: June 2, 2009
    Assignee: Research Institute of Industrial Science & Technology
    Inventors: Woo-Chul Jung, Kwang-Il Kim, Young-Deog Kim, Heung-Rak Kim
  • Patent number: 7486906
    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: Grant
    Filed: April 12, 2004
    Date of Patent: February 3, 2009
    Assignee: Samsung Electronics Co., Ltd
    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
  • Patent number: 7483048
    Abstract: An apparatus is provided for fixing a shaft of a cartridge and an image forming device including the apparatus. The apparatus includes a fixed supporting part formed at a frame, and rotatably supporting a first end of at least one shaft of at least one cartridge. A movable supporting part is formed at the frame to be movable between a first position and a second position, and rotatably supporting a second end of the shaft of the cartridge. An operating part operates to move the movable supporting part between the first position and the second position. The fixed supporting part and the movable supporting part fix the shaft of the cartridge, and the movable supporting part works together with opening and closing operation of the cover. The shaft of the cartridge is fixed in the proper position, but also a corresponding cartridge, such as an image forming cartridges, is easily assembled and disassembled in the frame of the main body when the cartridge is mounted in the frame.
    Type: Grant
    Filed: July 14, 2005
    Date of Patent: January 27, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Woo-chul Jung, Se-hyun Lyu, Heung-sup Jeong
  • Publication number: 20080312355
    Abstract: A composition for forming a prism layer and a prism film manufactured using the same. The composition for forming a prism layer includes a UV-curable monomer A, including a fluorene derivative diacrylate monomer represented by Formula 1 or 2; a UV-curable monomer B, including at least one acrylate monomer; a photoinitiator; and an additive, and thus is excellent in surface strength, adhesion to a substrate film and anti-yellowing properties, with a viscosity suitable for formation of the prism layer.
    Type: Application
    Filed: January 26, 2006
    Publication date: December 18, 2008
    Applicant: Kolon Ind, INC./KR
    Inventors: Woo Chul Jung, Chang Kun Kim, Jong Min Park
  • Publication number: 20080248256
    Abstract: Disclosed herein is a transparent optical film, including an optically structured layer, which is a sheet formed of a transparent polymeric material and composed of a first surface having three-dimensional structures thereon and a second surface opposite the first surface, and a damage prevention layer formed on the second surface of the optically structured layer and composed of a transparent polymeric material and spherical organic or inorganic particles. The damage prevention layer has protruding surface portions formed by the particles protruding from the transparent polymeric material. The optical film of the current invention is advantageous because the prism structure and the opposite surface of the optical film are prevented from damage due to external impact, vibration and friction, and the attachment of impurities due to frictional static charges is prevented. Further, the front luminance and optical properties of the optical film are improved.
    Type: Application
    Filed: March 18, 2005
    Publication date: October 9, 2008
    Inventors: Hyun Jin Kim, Jong Min Park, Chang Gun Kim, Ji Seong Kim, Woo Chul Jung
  • Publication number: 20080138130
    Abstract: A fusing device that is provided on a printing passage of an image forming apparatus and fuses an image transferred to a print medium, the fusing device including: a heating roller; a pressure roller to press a print medium fed along the printing passage against the heating roller; a separation roller to separate the print medium from the heating roller; a fusing pressure belt that winds around the pressure roller and the separation roller; a first elastic member to pressure the pressure roller towards the heating roller along a first line; and a second elastic member to pressure the separation roller towards the heating roller, wherein the first line passes through a center of the pressure roller and forms an angle towards the separation roller with a second line that passes through a center of the heating roller and the center of the pressure roller.
    Type: Application
    Filed: June 29, 2007
    Publication date: June 12, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Eun-sang PARK, Woo-chul Jung, Kyung-shig Chung
  • Publication number: 20080134824
    Abstract: An image forming apparatus includes a main body unit which has an image forming unit; a door unit which couples with the main body unit to open and close the main body unit, and has a projection at one side thereof; a mid-transfer unit which couples with the door unit; a coupling knob which is provided in the main body unit and rotates in cooperation with pressure of the projection when the door unit is closed; and a coupling apparatus which is provided in the main body and transmits a driving force from the main body unit to the mid-transfer unit in cooperation with the rotation of the coupling knob.
    Type: Application
    Filed: November 29, 2007
    Publication date: June 12, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Woo-chul Jung, Jin-kyu Yang, Sang-woon Lee, Eun-sang Park
  • Patent number: 7336916
    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: Grant
    Filed: May 27, 2005
    Date of Patent: February 26, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Woo-chul Jung, Heung-sup Jeong, Se-hyun Lyu
  • Patent number: 7321381
    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: Grant
    Filed: June 30, 2004
    Date of Patent: January 22, 2008
    Inventors: Heung-kyu Jang, Se-hyun Lyu, Woo-chul Jung
  • Patent number: 7289749
    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: Grant
    Filed: April 12, 2004
    Date of Patent: October 30, 2007
    Assignee: Samsung Electronics Co., Ltd.
    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
  • Patent number: 7272341
    Abstract: Provided is an image forming apparatus. The image forming apparatus includes a print unit printing having a plurality of developer cartridges, each of which has a photoreceptor drum disposed therein. A plurality of fixing members are movable between a first position where the developer cartridges are installed and removed and a second position where the developer cartridges are fixed to the print unit. A pinion includes a female screw portion and a first sliding member includes a male screw portion that is engaged with the female screw portion, sliding backwards and forwards as the pinion rotates, and moving the fixing members to the first position or the second position.
    Type: Grant
    Filed: October 12, 2005
    Date of Patent: September 18, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Woo-Chul Jung, Heung-Sup Jeong, Se-Hyun Lyu
  • Publication number: 20070158208
    Abstract: An electrolysis-type apparatus for treating ballast water using NaOCl and a method thereof is provided. The apparatus includes: a ballast tank; an electrolyzer; a first circulation pump; a second circulation pump; and a controller. The ballast tank is installed in a ship to store seawater. The electrolyzer is connected with the ballast tank and electrolyzes the seawater. The circulation pumps are installed to allow the ballast water to flow into the electrolyzer and to discharge the electrolyzed water containing NaOCl to the ballast tank. The controller supplies power to the electrolyzer so as to control an NaOCl density and controls the circulation pumps. The apparatus and the method safely treat the seawater. Thus, environment pollution and ecosystem destruction can be minimized.
    Type: Application
    Filed: December 21, 2004
    Publication date: July 12, 2007
    Applicant: Research Institute of Industrial Science & Technology
    Inventors: Woo-Chul Jung, Kwang-Il Kim, Young-Deog Kim, Heung-Rak Kim
  • Publication number: 20060238598
    Abstract: A laser scan unit for an image forming apparatus is provided that compensates for an error of the irradiating position of a laser beam on a photoconductive medium, such as the error caused by processing errors or assembling errors of component parts. The laser scan unit includes a frame, a laser scan unit mounted in the frame and projecting a laser beam on a photoconductive medium according to printing data, and a control unit tilting the laser scan unit on the frame to adjust the irradiation position of the laser beam on the photoconductive medium in main scanning and sub scanning directions.
    Type: Application
    Filed: January 9, 2006
    Publication date: October 26, 2006
    Inventors: Woo-chul Jung, Se-hyun Lyu, Heung-sup Jeong
  • Patent number: 7110712
    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: Grant
    Filed: August 30, 2004
    Date of Patent: September 19, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Young-min Yoon, Byeong-hwa Ahn, Se-hyun Lyu, Woo-chul Jung
  • Publication number: 20060165427
    Abstract: An apparatus is provided for fixing shaft of photosensitive body and an image forming device including the apparatus. The apparatus includes a fixed supporting part formed at a frame, and rotatably supporting a first end of a shaft of at least one photosensitive body. A movable supporting part is formed at the frame to be movable between a first position and a second position, and rotatably supporting a second end of the shaft of the photosensitive body. An operating part operates to move the movable supporting part between the first position and the second position. The fixed supporting part and the movable supporting part fix the shaft of the photosensitive body, and the movable supporting part works together with opening and closing operation of the cover. The shaft of the photosensitive body is fixed in the proper position, but also a corresponding image forming cartridge is easily assembled and disassembled in the frame of the main body when the image forming cartridge is mounted in the frame.
    Type: Application
    Filed: July 14, 2005
    Publication date: July 27, 2006
    Inventors: Woo-chul Jung, Se-hyun Lyu, Heung-sup Jeong
  • Patent number: 7082281
    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: Grant
    Filed: April 12, 2004
    Date of Patent: July 25, 2006
    Assignee: Samsung Electronics Co., Ltd.
    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
  • Patent number: 7076187
    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: Grant
    Filed: April 12, 2004
    Date of Patent: July 11, 2006
    Assignee: Samsung Electronics Co., Ltd.
    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: 20060127129
    Abstract: Provided is an image forming apparatus. The image forming apparatus includes a print unit printing having a plurality of developer cartridges, each of which has a photoreceptor drum disposed therein. A plurality of fixing members are movable between a first position where the developer cartridges are installed and removed and a second position where the developer cartridges are fixed to the print unit. A pinion includes a female screw portion and a first sliding member includes a male screw portion that is engaged with the female screw portion, sliding backwards and forwards as the pinion rotates, and moving the fixing members to the first position or the second position.
    Type: Application
    Filed: October 12, 2005
    Publication date: June 15, 2006
    Inventors: Woo-Chul Jung, Heung-Sup Jeong, Se-Hyun Lyu
  • Publication number: 20060115303
    Abstract: Provided are a color registration sensing device to detect color registration of a color image to adjust color registration. An electrophotographic color image forming apparatus is also provided that includes a case with a door and the color registration sensing device is disposed on the case. The color registration sensing device includes at least one sensor to detect color registration of a color image, a holder including a cleaning medium which cleans the sensor while making a reciprocating movement between a first position and a second position, and an actuator to move the holder from the first position to the second position when a door of a case of an electrophotographic color image forming apparatus is closed. The holder is set to deviate from a transfer path of paper at the second position.
    Type: Application
    Filed: November 23, 2005
    Publication date: June 1, 2006
    Inventors: Il-Kwon Kang, Heung-sup Jeong, Woo-Chul Jung
  • Patent number: 7054578
    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: Grant
    Filed: April 12, 2004
    Date of Patent: May 30, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Woo-chul Jung, Heung-sup Jeong, Byeong-hwa Ahn, Kyung-shig Chung