Patents by Inventor Chang-Soo Yu

Chang-Soo Yu 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: 8425021
    Abstract: Disclosed is an ink cartridge for a printer, comprising a body having an opened surface and a predetermined shape to receive ink therein; a cover coupled with the body to define a desired space; and a chamber instrument comprising a filling chamber having a space for receiving a part of the ink in the body, a discharging chamber connected with the filling chamber, an ink transferring channel for moving the ink received in the filling chamber to the discharging chamber, an air guiding hold for guiding air to an inside of the cartridge, an air suction valve for selectively passing the guided air and a pressure regulating valve for regulating an internal pressure of the body.
    Type: Grant
    Filed: March 28, 2007
    Date of Patent: April 23, 2013
    Assignee: Inktec Co., Ltd.
    Inventors: Kwang-Choon Chung, Chang Soo Yu, Nam Boo Cho, Young Chul Shin, Baek Song Heo, In-Ha Kim, Jae-Won Choi
  • Patent number: 8162441
    Abstract: The present invention relates to an ink-cartridge loading/unloading apparatus used in various devices onto which an ink-cartridge is capable of minimizing damage of a flexible printed wiring board of the ink-cartridge. The ink-cartridge loading/unloading apparatus according to the present invention comprises a vertically extending main body having a support portion; a mounting part connected to the front surface of the main body; and a coupling part connecting the main body and the mounting part. A metal coupling bar or a magnetic substance inserted in a coupling bar is attached to an electromagnet provided in a side of the main body, whereby the mounting part is coupled to the main body. The mounting part is released from a coupled state by pressing a button bar with an external force, and an elastic means is further provided between the mounting part and the main body.
    Type: Grant
    Filed: November 15, 2006
    Date of Patent: April 24, 2012
    Assignee: Inktec Co., Ltd.
    Inventors: Jeong-Guck Lee, Hae-Sung Jung, Ki-Yong Kim, Kwang-Choon Chung, Chang-Soo Yu
  • Patent number: 8128211
    Abstract: The present invention relates to an ink-cartridge for printers comprising a body formed having a filling hole on an upper surface thereof; a plurality of filling chambers inside of the body divided by a partition having a connecting hole; a discharging chamber connected to the filling chamber; an air chamber connected to the filling chamber via an air transferring channel so as to supply air to the filling chamber; an air suction valve installed in the air chamber; an air inducing channel inducing external air to the air suction valve; a blocking film attached to one surface of the body; and a cover installed in the other side surface of the body; and a pressure regulating part formed in a surface of an outer wall of the body and communicating with the filling chamber.
    Type: Grant
    Filed: October 25, 2006
    Date of Patent: March 6, 2012
    Assignee: Inktec Co., Ltd
    Inventors: Kwang-Choon Chung, Chang-Soo Yu, Nam-Boo Cho, Young-Chul Shin, Bae-Song Heo
  • Patent number: 7997708
    Abstract: An ink cartridge for printers and ink filling method that can expand the space where the ink is filled, and maintain pressure inside the ink cartridge. The ink cartridge includes a body formed in a predetermined shape and having a filling hold on one surface, a filling chamber where ink is filled inside the body, a discharging chamber connected to the filling chamber, an ink discharging port connected to the discharging chamber through an ink transferring channel, an air chamber connected to the filling chamber to supply air through an air transferring channel, an air suction valve in the air chamber, an air inducing channel that induces exterior air into the air suction valve, a blocking film attached to one surface of the body, a cover installed on another surface of the body, a pressure regulating part on one surface of outer body, which communicates with the filling chamber.
    Type: Grant
    Filed: March 17, 2007
    Date of Patent: August 16, 2011
    Assignee: Inktec Co., Ltd.
    Inventors: Kwang-Choon Chung, Chang Soo Yu, Nam Boo Cho, Young Chul Shin, Baek Song Heo
  • Publication number: 20110174950
    Abstract: The present invention relates to an ink-cartridge loading/unloading apparatus used in various devices onto which an ink-cartridge is capable of minimizing damage of a flexible printed wiring board of the ink-cartridge. The ink-cartridge loading/unloading apparatus according to the present invention comprises a vertically extending main body having a support portion; a mounting part connected to the front surface of the main body; and a coupling part connecting the main body and the mounting part. A metal coupling bar or a magnetic substance inserted in a coupling bar is attached to an electromagnet provided in a side of the main body, whereby the mounting part is coupled to the main body. The mounting part is released from a coupled state by pressing a button bar with an external force, and an elastic means is further provided between the mounting part and the main body.
    Type: Application
    Filed: November 15, 2006
    Publication date: July 21, 2011
    Applicant: INKTEC CO., LTD.
    Inventors: Jeong-Guck Lee, Hae-Sung Jung, Ki-Yong Kim, Kwang-Choon Chung, Chang-Soo Yu
  • Patent number: 7686436
    Abstract: The present invention relates to an ink recharging system in which the ink can be recharged into a used ink cartridge repeatedly, a bulk ink cartridge used in the system, and a method for recharging the ink into the ink cartridge using them. The ink recharging system for the ink cartridge installed in an inkjet printer comprises a compressor and a positive pressure tank for providing the compression force to supply the ink stored in the quantitative ink supply cylinder to the ink cartridge, a charging cylinder for applying the compression force and the suction force to the quantitative ink supply cylinder, automatic quantitative position control means for measuring the movement displacement of the charging cylinder, a vacuum pump and a negative pressure tank for producing a vacuum in the ink cartridge, and a compressed air supply tube diverged and connected to the inlet and outlet of the charging cylinder from the positive pressure tank via the solenoid valve for air pressure.
    Type: Grant
    Filed: July 12, 2006
    Date of Patent: March 30, 2010
    Assignee: Inktec Co., Ltd.
    Inventors: Hae-Sung Jung, Chang-Soo Yu, Kwang-Choon Chung, In-Ha Kim, Ki-Hun Kang, Hyung-Ho Gil
  • Patent number: 7661804
    Abstract: An ink cartridge recharge system includes an ink cartridge mount hole in which an ink cartridge is mounted. The ink cartridge mount hole includes an ink injection part in which an ink injection hole connected to a nozzle of the ink cartridge is formed. A magnetostrictive displacement transducer is connected to the ink injection hole through an ink supply tube and determines the charged amount of ink by sensing displacement of magnetic field due to displacement of an internal float. A positive pressure tank stores high pressure air by a compressor. A bulk cartridge is connected to one side of the magnetostrictive displacement transducer to supply ink to be charged. A negative pressure tank is connected to the ink injection hole of the ink cartridge mount hole through a vacuum tube.
    Type: Grant
    Filed: July 13, 2006
    Date of Patent: February 16, 2010
    Assignee: INKTEC Co., Ltd.
    Inventors: Kwang-Choon Chung, Chang-Soo Yu, Hae-Sung Jung, Ki-Hun Kang, Ki-Yong Kim, Jeong-Guck Lee, Chung-Il Kim
  • Publication number: 20090073245
    Abstract: The present invention relates to an ink-cartridge for printers comprising a body formed having a filling hole on an upper surface thereof; a plurality of filling chambers inside of the body divided by a partition having a connecting hole; a discharging chamber connected to the filling chamber; an air chamber connected to the filling chamber via an air transferring channel so as to supply air to the filling chamber; an air suction valve installed in the air chamber; an air inducing channel inducing external air to the air suction valve; a blocking film attached to one surface of the body; and a cover installed in the other surface of the body; and a pressure regulating part formed in a surface of an outer wall of the body and communicating with the filling chamber.
    Type: Application
    Filed: October 25, 2006
    Publication date: March 19, 2009
    Applicant: Inktec Co., Ltd.
    Inventors: Kwang-Choon Chung, Chang-Soo Yu, Nam-Boo Cho, Young-Chul Shin, Bae-Song Heo
  • Publication number: 20080291249
    Abstract: The present invention relates to an ink recharging system in which the ink can be recharged into a used ink cartridge repeatedly, a bulk ink cartridge used in the system, and a method for recharging the ink into the ink cartridge using them. The ink recharging system for the ink cartridge installed in an inkjet printer comprises a compressor and a positive pressure tank for providing the compression force to supply the ink stored in the quantitative ink supply cylinder to the ink cartridge, a charging cylinder for applying the compression force and the suction force to the quantitative ink supply cylinder, automatic quantitative position control means for measuring the movement displacement of the charging cylinder, a vacuum pump and a negative pressure tank for producing a vacuum in the ink cartridge, and a compressed air supply tube diverged and connected to the inlet and outlet of the charging cylinder from the positive pressure tank via the solenoid valve for air pressure.
    Type: Application
    Filed: July 12, 2006
    Publication date: November 27, 2008
    Inventors: Hae-Sung Jung, Chang-Soo Yu, Kwang-Choon Chung, In-Ha Kim, Ki-Hun Kang, Hyung-Ho Gil
  • Publication number: 20080284832
    Abstract: Disclosed is an ink cartridge for a printer, comprising a body having an opened surface and a predetermined shape to receive ink therein; a cover coupled with the body to define a desired space; and a chamber instrument comprising a filling chamber having a space for receiving a part of the ink in the body, a discharging chamber connected with the filling chamber, an ink transferring channel for moving the ink received in the filling chamber to the discharging chamber, an air guiding hold for guiding air to an inside of the cartridge, an air suction valve for selectively passing the guided air and a pressure regulating valve for regulating an internal pressure of the body.
    Type: Application
    Filed: March 28, 2007
    Publication date: November 20, 2008
    Applicant: INKTEC CO., LTD.
    Inventors: Kwang-Choon Chung, Chang Soo Yu, Nam Boo Cho, Young Chul Shin, Baek Song Heo, In-Ha Kim, Jae-Won Choi
  • Publication number: 20080278556
    Abstract: An ink cartridge for printers and ink filling method that can expand the space where the ink is filled, and maintain pressure inside the ink cartridge. The ink cartridge includes a body formed in a predetermined shape and having a filling hold on one surface, a filling chamber where ink is filled inside the body, a discharging chamber connected to the filling chamber, an ink discharging port connected to the discharging chamber through an ink transferring channel, an air chamber connected to the filling chamber to supply air through an air transferring channel, an air suction valve in the air chamber, an air inducing channel that induces exterior air into the air suction valve, a blocking film attached to one surface of the body, a cover installed on another surface of the body, a pressure regulating part on one surface of outer body, which communicates with the filling chamber.
    Type: Application
    Filed: March 17, 2007
    Publication date: November 13, 2008
    Applicant: INKTEC CO., LTD.
    Inventors: Kwang-Choon Chung, Chang Soo Yu, Nam Boo Cho, Young Chul Shin, Baek Song Heo
  • Publication number: 20070146448
    Abstract: An ink recharge system capable of repeatedly charging a proper amount of ink in an ink cartridge using magnetostrictive displacement transducers and a method of recharging ink in the ink cartridge are provided. The ink cartridge recharge system for an inkjet printer includes a compressor and a positive pressure tank providing compression force for supplying the ink stored in magnetostrictive displacement transducers to an ink cartridge, magnetostrictive displacement transducers for charging a proper amount of ink, a vacuum pump and a negative pressure tank for making the inside of the ink cartridge vacuous, and a pneumatic tube divided from a positive pressure tank and a vacuum tube divided from a negative pressure tank connected to pneumatic regulators of the magnetostrictive displacement transducers through the pneumatic solenoid valve.
    Type: Application
    Filed: July 13, 2006
    Publication date: June 28, 2007
    Inventors: Kwang-Choon Chung, Chang-Soo Yu, Hae-Sung Jung, Ki-Hun Kang, Ki-Yong Kim, Jeong-Guck Lee, Chung-Il Kim
  • Patent number: D422632
    Type: Grant
    Filed: September 2, 1998
    Date of Patent: April 11, 2000
    Assignee: Inktec Co., Inc.
    Inventors: Kwang Choon Chung, Young Ho Chung, Chang Soo Yu, Nam Bu Cho, Ju Yeon Lee, Ju Jin Choi