Patents by Inventor Dong-ha Choi

Dong-ha Choi 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: 8565662
    Abstract: A hinge apparatus for a cover of an image forming apparatus has a hinge body with supporting brackets, movably inserted into a coupling hole positioned in a main body of the image forming apparatus, a hinge cam connected to the cover and pivotably connected to the supporting brackets, and a pressure device disposed at the hinge body to press the hinge cam. Accordingly, the hinge apparatus can be implemented with a simple and easy assembly operation, since it is not a complicated structural connection among the component parts of the hinge apparatus.
    Type: Grant
    Filed: October 16, 2012
    Date of Patent: October 22, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Dong-ha Choi
  • Patent number: 8315540
    Abstract: An image forming apparatus to be placed on a desktop includes a first body, a second body which is pivotally mounted above the first body, a light emitting unit disposed in the second body, an image forming unit disposed in the first body so as to form a C-shaped paper feeding path, a first power supply unit and a second power supply unit disposed on a bottom surface of the first body, a controlling board disposed on a first side wall of the first body, and a power transmission unit disposed on a second side wall of the first body.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: November 20, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong-ha Choi, Kiel-jae Hur
  • Patent number: 8315549
    Abstract: A hinge apparatus for a cover of an image forming apparatus has a hinge body with supporting brackets, movably inserted into a coupling hole positioned in a main body of the image forming apparatus, a hinge cam connected to the cover and pivotably connected to the supporting brackets, and a pressure device disposed at the hinge body to press the hinge cam. Accordingly, the hinge apparatus can be implemented with a simple and easy assembly operation, since it is not a complicated structural connection among the component parts of the hinge apparatus.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: November 20, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Dong-ha Choi
  • Publication number: 20120224884
    Abstract: An image forming apparatus including: a first body including a developing unit to perform an image forming operation on a print medium, and a second body provided above the first body to pivot between a closed position and an open position in relation to the first body, the second body including a light emitting unit, wherein the light emitting unit is directly above the developing unit when the second body is in the closed position, and the developing unit is exposed to an outside of the image forming apparatus when the second body is in the closed position. A user can place the image forming apparatus on a desktop, which increases convenience in using the apparatus. Additionally, a specialized image forming apparatus can be provided to a user who mainly wants to print and copy in small quantities.
    Type: Application
    Filed: May 14, 2012
    Publication date: September 6, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Dong-ha Choi, Kiel-jae Hur, Young-min Kim
  • Patent number: 8200117
    Abstract: An image forming apparatus including: a first body including a developing unit to perform an image forming operation on a print medium, and a second body provided above the first body to pivot between a closed position and an open position in relation to the first body, the second body including a light emitting unit, wherein the light emitting unit is directly above the developing unit when the second body is in the closed position, and the developing unit is exposed to an outside of the image forming apparatus when the second body is in the closed position. A user can place the image forming apparatus on a desktop, which increases convenience in using the apparatus. Additionally, a specialized image forming apparatus can be provided to a user who mainly wants to print and copy in small quantities.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: June 12, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong-ha Choi, Kiel-jae Hur, Young-min Kim
  • Patent number: 8128087
    Abstract: A power transmitter for an image forming apparatus transmitting power to a plurality of feeding rollers, including a plurality of feeding roller rotation shafts rotatably mounted at certain distances from one another and forming a feeding path of a printing medium by a plurality of feeding rollers which are coaxially mounted therewith; a driving unit rotating one of the plurality of feeding roller rotation shafts; and a feeding gear train mounted on the feeding path of the printing medium to transmit a rotational force of one of the plurality of feeding roller rotation shafts being rotated by the driving unit to the other feeding roller rotation shafts.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: March 6, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Dong-ha Choi
  • Patent number: 7952605
    Abstract: A light scanning unit assembly, an electrophotographic image forming apparatus including the light scanning unit assembly, and a method of adjusting a scanning line skew. The light scanning unit assembly includes a frame, a primary light scanning unit and at least one secondary light scanning unit each being mounted to the frame to scan a corresponding beam, and a skew adjuster to adjust a scanning line skew of the at least one secondary light scanning unit to equal a scanning line skew of the primary light scanning unit. In the light scanning unit assembly, the skew adjuster includes at least one side to project out from at least one side of the at least one secondary light scanning unit, at least one adjusting screw to connect the at least one side projection with the frame, and at least one elastic member interposed between the at least one side projection and the frame.
    Type: Grant
    Filed: July 12, 2005
    Date of Patent: May 31, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: In-sick Seo, Dong-ha Choi
  • Patent number: 7949292
    Abstract: A hinge apparatus for a cover of an image forming apparatus has a hinge body with supporting brackets, movably inserted into a coupling hole positioned in a main body of the image forming apparatus, a hinge cam connected to the cover and pivotably connected to the supporting brackets, and a pressure device disposed at the hinge body to press the hinge cam. Accordingly, the hinge apparatus can be implemented with a simple and easy assembly operation, since it is not a complicated structural connection among the component parts of the hinge apparatus.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: May 24, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Dong-ha Choi
  • Publication number: 20110070002
    Abstract: In the image forming apparatus, a developing unit and a fusing unit are arranged to horizontally face each other. A printing path between the developing unit and the fusing unit includes a downward slope to guide a printing medium immediately having passed through the transfer nip and an upward slope to guide the printing medium approaching the fusing nip. The fusing nip is located lower than the transfer nip, preventing pollution of a rear end of the printing medium.
    Type: Application
    Filed: September 9, 2010
    Publication date: March 24, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventor: Dong Ha Choi
  • Patent number: 7773910
    Abstract: An image forming apparatus including: a first body; a second body to pivot between a closed position and an open position in relation to the first body; a guide lever member to control a pivoting of the second body and having a first end connected to one of the first body and the second body, and a second end, opposite the first end; and a guide rail member including: a guide rail along which the second end of the guide lever member is slidably connected. The guide rail member includes a first pressing portion to constrain the second end of the guide lever member in the open position of the second body, and a second pressing portion to prevent the second body from abruptly closing while the second body is being closed.
    Type: Grant
    Filed: January 3, 2008
    Date of Patent: August 10, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yoo-hung Jeong, Seung-hak Han, Dong-ha Choi
  • Patent number: 7665183
    Abstract: A hinge apparatus for a cover of an image forming apparatus has a hinge body with supporting brackets, movably inserted into a coupling hole positioned in a main body of the image forming apparatus, a hinge cam connected to the cover and pivotably connected to the supporting brackets, and a pressure device disposed at the hinge body to press the hinge cam. Accordingly, the hinge apparatus can be implemented with a simple and easy assembly operation, since it is not a complicated structural connection among the component parts of the hinge apparatus.
    Type: Grant
    Filed: June 25, 2008
    Date of Patent: February 23, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Dong-ha Choi
  • Publication number: 20090274502
    Abstract: A hinge apparatus for a cover of an image forming apparatus has a hinge body with supporting brackets, movably inserted into a coupling hole positioned in a main body of the image forming apparatus, a hinge cam connected to the cover and pivotably connected to the supporting brackets, and a pressure device disposed at the hinge body to press the hinge cam. Accordingly, the hinge apparatus can be implemented with a simple and easy assembly operation, since it is not a complicated structural connection among the component parts of the hinge apparatus.
    Type: Application
    Filed: July 10, 2009
    Publication date: November 5, 2009
    Applicant: Samsung Electronics Co. Ltd.
    Inventor: Dong-Ha Choi
  • Patent number: 7593146
    Abstract: An image scanning device is provided including a sensor unit which carries an image sensor. The sensor unit is installed within a scanner body and is capable of reciprocating underneath a flat glass plate. The sensor unit has an image sensor and a cleaning unit arranged on a moving route of the sensor unit to remove static electricity as well as contaminants remaining on the image sensor when the cleaning unit contacts the image sensor.
    Type: Grant
    Filed: December 29, 2005
    Date of Patent: September 22, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong-Ha Choi, Byung-Sun Ahn, Ho-Ill Hyun
  • Publication number: 20090188078
    Abstract: A hinge apparatus for a cover of an image forming apparatus has a hinge body with supporting brackets, movably inserted into a coupling hole positioned in a main body of the image forming apparatus, a hinge cam connected to the cover and pivotably connected to the supporting brackets, and a pressure device disposed at the hinge body to press the hinge cam. Accordingly, the hinge apparatus can be implemented with a simple and easy assembly operation, since it is not a complicated structural connection among the component parts of the hinge apparatus.
    Type: Application
    Filed: March 18, 2009
    Publication date: July 30, 2009
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Dong-ha Choi
  • Publication number: 20080263825
    Abstract: A hinge apparatus for a cover of an image forming apparatus has a hinge body with supporting brackets, movably inserted into a coupling hole positioned in a main body of the image forming apparatus, a hinge cam connected to the cover and pivotably connected to the supporting brackets, and a pressure device disposed at the hinge body to press the hinge cam. Accordingly, the hinge apparatus can be implemented with a simple and easy assembly operation, since it is not a complicated structural connection among the component parts of the hinge apparatus.
    Type: Application
    Filed: June 25, 2008
    Publication date: October 30, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Dong-ha Choi
  • Publication number: 20080253798
    Abstract: An image forming apparatus including: a first body including a developing unit to perform an image forming operation on a print medium, and a second body provided above the first body to pivot between a closed position and an open position in relation to the first body, the second body including a light emitting unit, wherein the light emitting unit is directly above the developing unit when the second body is in the closed position, and the developing unit is exposed to an outside of the image forming apparatus when the second body is in the closed position. A user can place the image forming apparatus on a desktop, which increases convenience in using the apparatus. Additionally, a specialized image forming apparatus can be provided to a user who mainly wants to print and copy in small quantities.
    Type: Application
    Filed: March 17, 2008
    Publication date: October 16, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Dong-ha CHOI, Kiel-jae Hur, Young-min Kim
  • Publication number: 20080252949
    Abstract: An image forming apparatus to be placed on a desktop includes a first body, a second body which is pivotally mounted above the first body, a light emitting unit disposed in the second body, an image forming unit disposed in the first body so as to form a C-shaped paper feeding path, a first power supply unit and a second power supply unit disposed on a bottom surface of the first body, a controlling board disposed on a first side wall of the first body, and a power transmission unit disposed on a second side wall of the first body.
    Type: Application
    Filed: March 14, 2008
    Publication date: October 16, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Dong-ha Choi, Kiel-jae Hur
  • Patent number: 7409176
    Abstract: An image forming apparatus including a photosensitive bodies fixing unit. The image forming apparatus includes: a main body frame; a fixing frame on which a plurality of photosensitive bodies are installed, the fixing frame being fixed at a predetermined position on the main body frame; a guide protruding portion formed on the fixing frame to guide the fixing frame to be coupled with the main body frame; a guide rail formed on the main body frame for the guide protruding portion to be inserted into; and a position determining portion formed on the guide rail to fix the guide protruding portion to a predetermined position. Accordingly, the parallel alignment between the scanning units and the photosensitive bodies may be relatively easily maintained and accurate color overlapping and color presentation are obtained to achieve high image quality.
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: August 5, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong-ha Choi, Myung-woo Yang
  • Publication number: 20080157639
    Abstract: An image forming apparatus including: a first body; a second body to pivot between a closed position and an open position in relation to the first body; a guide lever member to control a pivoting of the second body and having a first end connected to one of the first body and the second body, and a second end, opposite the first end; and a guide rail member including: a guide rail along which the second end of the guide lever member is slidably connected. The guide rail member includes a first pressing portion to constrain the second end of the guide lever member in the open position of the second body, and a second pressing portion to prevent the second body from abruptly closing while the second body is being closed.
    Type: Application
    Filed: January 3, 2008
    Publication date: July 3, 2008
    Applicant: Samsung Electronics Co. Ltd.
    Inventors: Yoo-hung Jeong, Seung-hak Han, Dong-ha Choi
  • Publication number: 20080063450
    Abstract: An image forming apparatus having a compact size includes a printing medium supplying unit to hold printing media and to supply a printing medium, an image forming unit disposed above the printing medium supplying unit to form images on a printing medium, and a printing medium feeding part substantially formed in a letter ā€œCā€ shape, having a part which extends to the image forming unit and which is inclined in a downward direction along a printing medium moving direction to feed the printing medium from the printing medium supplying unit to the image forming unit.
    Type: Application
    Filed: February 27, 2007
    Publication date: March 13, 2008
    Applicant: Samsung Electronics Co., Ltd.
    Inventor: Dong-ha Choi