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| 20090246673 | Method for Manufacturing a Toner Having Good Charging Characteristics - There is provided a toner having good charging characteristics that is composed of a core region and a thin shell in which a charge control agent is densely distributed so as to improve charging characteristics of the toner, and a method for manufacturing the same. The method for manufacturing a toner having a bi-layered structure includes: producing a toner core using a suspension polymerization method; preparing a suspension of toner particles having a core-shell structure by forming a rigid shell on a surface of the toner core; and recovering the toner particles from the suspension as a post-processing operation. | 10-01-2009 |
| 20090280430 | Method for Manufacturing Toner - There is provided a method for manufacturing a toner capable of providing a toner having excellent low-temperature fixing property and anti-offset property by adjusting a molecular weight distribution of a polymerization toner to a narrow distribution range. The method is characterized in that a toner is polymerized using a reversible addition-fragmentation chain transfer polymerization (RAFT) method by adding a dithioacetate, xanthate or dithioester-based chain transfer agent in the polymerization of a toner. The method for manufacturing a toner comprises: dissolving a dispersant in water to prepare an aqueous dispersion solution; mixing a binder resin monomer, a charge control agent, a pigment, a wax and a dithioacetate, xanthate or dithioester-based chain transfer agent to prepare a monomer mixture; adding the monomer mixture to the aqueous dispersion solution and suspension-polymerizing the monomer mixture to form a toner composition; removing the dispersant from the toner composition; and drying the dispersant-free toner composition under a vacuum condition. | 11-12-2009 |
| 20100104968 | Polymerized toner having high resolution - A polymerized toner is provided. The polymerized toner comprises a reactive anionic surfactant having at least one reactive functional group. The reactive anionic surfactant is added simultaneously with a dispersant to prepare an aqueous dispersion or is added within 2 hour after a polymerization reaction of a monomer mixture is initiated in an aqueous dispersion. This simultaneous or rapid addition allows the reactive anionic surfactant to be dispersed on the surface of the toner particles. The reactive anionic surfactant is located over the entire surface of the toner particles to increase the surface charge density of the toner, achieving good charge stability and excellent imaging characteristics. | 04-29-2010 |
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| 20110150542 | IMAGE FORMING APPARATUS AND TRANSFER DEVICE THEREOF - An image forming apparatus having an improvement to increase the reliability of a sensing operation that is carried out to improve image quality, and a transfer device thereof. The image forming apparatus includes at least one photosensitive member, a plurality of developing units to supply developer to the at least one photosensitive member so as to form a visible image, and a transfer belt to transfer the visible image formed on the at least one photosensitive member to a printing medium, an inner surface of the transfer belt being rotatably supported by at least two rollers. The image forming apparatus further includes at least one sensor to sense a mark formed on the transfer belt, and a supporting unit to support the transfer belt at a position corresponding to the at least one sensor so as to apply a tensile force to the transfer belt. The supporting unit includes a first supporting portion and a second supporting portion arranged to support the transfer belt at different two positions in a rotating direction of the transfer belt. | 06-23-2011 |
| 20110216784 | METHOD AND APPARATUS FOR GENERATING VIDEO PACKET - Methods and apparatuses for generating video packets are provided. A method of generating a video packet includes generating at least one pixel block including at least one reference pixel and at least one neighboring pixel adjacent to the at least one reference pixel from pixels of a video frame; replacing a pixel value of the at least one neighboring pixel in the at least one pixel block with a pixel difference value, which is a difference value between a pixel value of a pixel adjacent to the at least one neighboring pixel and the pixel value of the at least one neighboring pixel; and generating packets so that a pixel value of the at least one reference pixel and the pixel difference value of the at least one neighboring pixel are allocated to different packets according to positions of the pixels. | 09-08-2011 |
| 20110255896 | Image forming apparatus and method of controlling the same - An image forming apparatus including: an image carrying member supported in a body housing and forming a visible image by a developing agent; a transfer unit including a driving roller supported in the body housing and an intermediate transfer belt rotated by the driving roller in a first direction on which the visible image on the image carrying member is intermediately transferred to when a printing process is conducted on a recording medium; a cleaning blade in contact with the intermediate transfer belt to clean a remaining developing agent on the intermediate transfer belt rotating in the first direction; the intermediate transfer belt being rotated in an opposite direction to the first direction, for a preset period of time before the visible image is intermediately transferred and rotating the intermediate transfer belt in the first direction so that the visible image is intermediately transferred when the printing process starts. | 10-20-2011 |
| 20110272263 | METAL DOME SHEET COMPRISING CONDUCTIVITY SHEET - The keypad assembly uses a metal dome sheet that shields electromagnetic waves and noise. A metal dome is placed on a base sheet. And a conductive sheet is placed above the base sheet to shield electromagnetic waves and noise. | 11-10-2011 |
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| 20110189581 | COMPOUND, CROSS-LINKED MATERIAL THEREOF, DOUBLE CROSS-LINKED POLYMER THEREOF, AND ELECTROLYTE MEMBRANE, ELECTRODE FOR FUEL CELL AND FUEL CELL INCLUDING SAME - A compound having an amino group at a terminal thereof and at least one amino group in a repeating unit, a cross-linked material of the compound, a double cross-linked polymer thereof, an electrolyte membrane and an electrode for a fuel cell, which include the cross-linked material of the compound or the double cross-linked polymer thereof, and a fuel cell including at least one of the electrolyte membrane and the electrode. | 08-04-2011 |
| 20110189584 | POLYMER AND CROSS-LINKED POLYMER COMPOSITION, ELECTRODE AND ELECTROLYTE MEMBRANE INCLUDING CROSS-LINKED POLYMER, AND FUEL CELL INCLUDING ELECTRODE AND ELECTROLYTE MEMBRANE - A polymer composition, a cross-linked polymer formed therefrom, an electrolyte membrane and electrode for a fuel cell including the same, and a fuel cell employing the electrode and the electrolyte membrane. The cross-linked polymer includes an oxazine-based monomer capable of retaining phosphoric acid and has excellent mechanical strength. When the cross-linked polymer is used, an electrode and electrolyte membrane for a fuel cell with enhanced capability of retaining phosphoric acid at a wide range of temperature may be manufactured, leading to long-term durability, and enhanced proton conductivity. | 08-04-2011 |
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| 20090072418 | MANUFACTURING THIN-FILM TRANSISTOR AND COLOR FILTER SUBSTRATES - A method of manufacturing thin film transistor and color filter substrates suitable for liquid crystal displays comprises imprinting a pattern in a resin layer formed on a substrate by disposing a mold on the resin layer, aligning the mold and the substrate, curing an edge portion of the resin layer, pressing the full area of the resin layer, curing the full area of the resin layer, and separating the mold from the resin layer. | 03-19-2009 |
| 20110156118 | SEMICONDUCTOR DEVICE WITH VERTICAL CELLS AND FABRICATION METHOD THEREOF - A method for fabricating a semiconductor substrate includes defining an active region by forming a device isolation layer over the substrate, forming a first trench dividing the active region into a first active region and a second active region, forming a buried bit line filling a portion of the first trench, forming a gap-filling layer gap-filling an upper portion of the first trench over the buried bit line, forming second trenches by etching the gap-filling layer and the device isolation layer in a direction crossing the buried bit line, and forming a first buried word line and a second buried word line filling the second trenches, wherein the first buried word line and the second buried word line are shaped around sidewalls of the first active region and the second active region, respectively. | 06-30-2011 |
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| 20080248143 | Pulsatilla Spp. Extracts Effective in Brain Function - This invention relates to Pulsatillae Radix extract for improving brain functions. More specifically, this invention relates to Pulsatillae Radix extract, its active fractions and a pharmaceutical product and a health food containing the same respectively having a protective activity against neurotoxicity and a growth inhibitory effect induced by beta-amyloid, an anti-oxidizing effect, a neuron proliferating effect and improving memory thereby effective in improving brain functions such as Mild Cognitive Impairment and dementia. | 10-09-2008 |
| 20110214706 | CANOPY TENT - The present invention relates to a canopy tent, comprising: a main body having an outer surface with a plurality of joint rings, and a hollow interior; a sliding member having an outer surface with a plurality of joint rings, and an interior with a downwardly protruding cylinder; a support pole, one end of which is hinged to the joint rings of the main body, and the other end of which is connected to a tent pole for standing the tent fabric upright, and which has a pole connection portion with a joint ring formed at the outer surface thereof; and a joint bar, one end of which is hinged to the joint ring of the sliding member, and the other end of which has one side hinged to a first connection bar hinged to the joint ring of the support pole and the other side hinged to a second connection bar hinged to the joint ring of the main body. The hollow interior of the main body is equipped with a compression spring and a spring holder. The spring holder is coupled to the lower portion of the cylinder. The cylinder of the sliding member is fitted into the hollow interior of the main body from the top of the hollow interior such that the cylinder is movable in the upward and downward directions. The canopy tent of the present invention can be set up or taken down in a rapid and convenient manner using the elastic force of the compression spring arranged in the connection device installed on top of the tent and the elastic force of tent poles connected to the support poles hinged to the connection device. | 09-08-2011 |
| 20110320427 | SYSTEM AND METHOD FOR COLLECTING DOCUMENT - Provided is a system and method for collecting a document. The system may include an identification information receiver to receive, from a host of a site, identification information of a document of which an update may occur, a collection request transfer unit to transmit a collection request for the document based on the identification information, an update information collector to receive update information of the document from the host, and a search result provider to provide, to the host, a search result extracted from the update information of the document, in response to the search request being received from the host. The system for collecting the document may reduce load of a web site, and may improve accuracy of the document to be collected. | 12-29-2011 |
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| 20090034993 | METHOD AND APPARATUS FOR FORMING IMAGE - A method and apparatus for forming an image determine if printing paper is properly picked up, and printing data is transferred to an intermediate transfer belt (ITB). When it is sensed that the printing paper is not properly picked up, picking up the printing paper is retried considering a revolution cycle of the ITB. Thus, the frequency of errors can be decreased, and a user's convenience can be increased because picking up the printing paper is automatically retried whenever mis-pick up occurs instead of displaying an error. Further, wasting of toner is decreased. | 02-05-2009 |
| 20090103961 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD THEREOF - An image forming apparatus and an image forming method thereof. The image forming apparatus includes an image forming part which forms a color image on a printing medium, a pickup roller which picks up the printing medium, and a controller which controls the pickup roller to try to pick up the printing medium if image forming for a first color among a plurality of colors is completed, and controls the image forming part to form an image corresponding to a second color among the plurality of colors after trying to pick up the printing medium. | 04-23-2009 |
| 20110142470 | Image forming apparatus and control method thereof - A method of controlling an image forming apparatus and method thereof including a medium feeder configured to load therein and to pick up and feed a printing-target medium; an image forming unit configured to form an image on the printing-target medium that is picked up and fed; and a fixing unit configured to fix the printed medium on which the image has been formed, the method including: heating the fixing unit such that a temperature of the fixing unit reaches a fixing reference temperature determined corresponding to the printing-target medium if an printing operation is started; sensing the temperature of the fixing unit corresponding to the start of the printing operation and compensating a pickup timing temperature corresponding to whether the sensed temperature thereof is higher or lower than a predetermined first reference temperature, the pickup timing temperature being a temperature for picking up the printing-target medium; and picking up the printing-target medium when the temperature of the fixing unit that is being heated reaches the compensated pickup timing temperature. | 06-16-2011 |
