Patents by Inventor Kyu-cheol Shin

Kyu-cheol Shin 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: 6263176
    Abstract: An apparatus for cleaning a transfer roller and an optical photoreceptor cleans the transfer roller for transferring a toner image formed on the optical photoreceptor of a printing device to a recording paper, and includes a cleaning roller installed to closely contact an outer circumferential surface of the transfer roller and to be rotatable; a heat source installed in the cleaning roller for heating an outer circumferential surface of the cleaning roller; and a cleaning roller moving mechanism which causes the cleaning roller either to contact or be separated from the outer circumferential surface of the transfer roller. In addition, the apparatus further includes a waste ink mechanism which removes waste ink on the outer circumferential surface of the cleaning roller, and a discharge mechanism which discharges the removed waste ink.
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: July 17, 2001
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyung-jin An, Kyu-cheol Shin
  • Patent number: 6104893
    Abstract: An image forming device forms an image on a recordable medium with image data supplied from a document. The device provides an otpimum print quality by varying a fixing temperature of a fixing unit after presuming an amount of consumed toner. In another embodiment, the image forming device is capable of supplying an optimum print quality by varying a transferring voltage level of a transfer unit after presuming the amount of consumed toner.
    Type: Grant
    Filed: July 23, 1998
    Date of Patent: August 15, 2000
    Assignee: SamSung Electronics Co., Ltd.
    Inventors: Sang-hyeon Byeon, Nam-ryoung Kim, Seung-deok An, Kyu-cheol Shin
  • Patent number: 5978616
    Abstract: A charger for charging the surface of a photoconductive drum by a contact charging method in an electrophotographic image forming apparatus includes: a charge roller for charging an unexposed surface of the photoconductive drum to a prescribed potential by contact with the surface of the photoconductive drum; a power supply connected to the charge roller, for supplying a variable DC charge voltage to the charge roller; a potential sensor installed around the photoconductive drum, for detecting a charge potential value of the unexposed surface of the photoconductive drum; and a controller for comparing the charge potential value detected by the potential sensor with a specified value, and changing the charge voltage generated by the power supply upon detecting any difference therebetween, so as to maintain the charge potential of the photoconductive drum at a constant value.
    Type: Grant
    Filed: August 17, 1998
    Date of Patent: November 2, 1999
    Assignee: SamSung Electronics Co., Ltd.
    Inventor: Kyu-Cheol Shin
  • Patent number: 5517223
    Abstract: An inkjet printing method and apparatus in which an ejecting head is rotated to selectively eject ink by centrifugal force. The viscosity of ink is varied electrically or magnetically. The method and apparatus requires no additional heater, piezoelectric element or compressor, thereby simplifying the structure and reducing the production cost of the printer.
    Type: Grant
    Filed: December 29, 1993
    Date of Patent: May 14, 1996
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Kyu-cheol Shin