Abstract: A PCI-E signal transmission apparatus and an image forming apparatus using the same are provided. The PCI-E signal transmission apparatus includes a controller board, and at least one unit board which is connected to the controller board through a differential signal transmission cable, which uses a PCI-E protocol, to transceive data. Therefore, it is possible to transmit a signal using an inexpensive cable at a high speed.

Abstract: Provided are an ultra-rapid hardening hydraulic binder including reduced slag powder and a method of preparing the same. The reduced slag powder is prepared by rapidly cooling molten electric arc furnace reduced slag, among by-products generated during an iron refinement process in a steel mill, to room temperature not to have free-calcium oxide by scattering the molten electric arc furnace reduced slag into the air using high-pressure gas by dropping the molten electric arc furnace reduced slag through a tundish.

Abstract: An image forming apparatus for controlling power supply is provided. An image forming apparatus includes at least one cover unit to be mounted in the image forming apparatus, at least one replaceable unit to participate in an image forming operation of the image forming apparatus, a sensing unit to sense whether the at least one cover unit is opened or closed, and a main board unit to cut off the power supply to the at least one replaceable unit for a predetermined period of time when the at least one cover unit is opened or closed. Accordingly, stable operation is enabled.

Abstract: An image forming apparatus for controlling power supply is provided. An image forming apparatus includes at least one cover unit to be mounted in the image forming apparatus, at least one replaceable unit to participate in an image forming operation of the image forming apparatus, a sensing unit to sense whether the at least one cover unit is opened or closed, and a main board unit to cut off the power supply to the at least one replaceable unit for a predetermined period of time when the at least one cover unit is opened or closed. Accordingly, stable operation is enabled.

Abstract: An image forming apparatus for controlling power supply is provided. An image forming apparatus includes at least one cover unit to be mounted in the image forming apparatus, at least one replaceable unit to participate in an image forming operation of the image forming apparatus, a sensing unit to sense whether the at least one cover unit is opened or closed, and a main board unit to cut off the power supply to the at least one replaceable unit for a predetermined period of time when the at least one cover unit is opened or closed. Accordingly, stable operation is enabled.

Abstract: An image forming apparatus and a method of transmitting a signal. The image forming apparatus includes a main controller to convert a plurality of image signals corresponding to printing data into differential signals, and to combine the converted differential signals into a plurality of transmission signals, a printing engine unit to restore the image signal after the plurality of transmission signals are transmitted from the main controller, and a plurality of transfer cables to transmit the plurality of transmission signals between the main controller and the printing engine unit. The number of cables to transmit an image signal is reduced, which is economically efficient, additionally, the size of the image forming apparatus is minimized.

Abstract: A PCI-E signal transmission apparatus and an image forming apparatus using the same are provided. The PCI-E signal transmission apparatus includes a controller board, and at least one unit board which is connected to the controller board through a differential signal transmission cable, which uses a PCI-E protocol, to transceive data. Therefore, it is possible to transmit a signal using an inexpensive cable at a high speed.

Abstract: An image forming apparatus for controlling power supply is provided. An image forming apparatus includes at least one cover unit to be mounted in the image forming apparatus, at least one replaceable unit to participate in an image forming operation of the image forming apparatus, a sensing unit to sense whether the at least one cover unit is opened or closed, and a main board unit to cut off the power supply to the at least one replaceable unit for a predetermined period of time when the at least one cover unit is opened or closed. Accordingly, stable operation is enabled.

Abstract: A multifunctional apparatus includes a first circuit board which is installed on a low surface of a main body, receives a current from an external power source and supplies the current to other circuit boards and devices; a second circuit board which is installed on a surface of the main body and includes a controller to control the other circuit boards and devices; and a third circuit board which is installed on an upper surface of the main body and supplies the current or transfers control signals to a scanning unit.

Abstract: An image forming apparatus and a method of transmitting a signal. The image forming apparatus includes a main controller to convert a plurality of image signals corresponding to printing data into differential signals, and to combine the converted differential signals into a plurality of transmission signals, a printing engine unit to restore the image signal after the plurality of transmission signals are transmitted from the main controller, and a plurality of transfer cables to transmit the plurality of transmission signals between the main controller and the printing engine unit. The number of cables to transmit an image signal is reduced, which is economically efficient, additionally, the size of the image forming apparatus is minimized.

Abstract: A fusing device for an image forming apparatus including a cylindrical fusing roller, a pressure roller installed opposite to the fusing roller and pressing a sheet of paper passing therebetween, and an inductive heating element simultaneously heating the fusing roller and the pressure roller. The fusing device reduces the time to reach a fusing temperature by heating both the fusing roller and the pressure roller with a closed magnetic core extending between hollow portions of each.

Abstract: A fusing device of an image forming apparatus and method thereof are provided. The fusing device and method include a conductive member having a linear portion for contacting a printing medium, a fusing film for sliding on a circumference of the conductive member, a pressing roller for contacting the fusing film in the linear portion, forming a fusing nip area, and rotating the fusing film, and an induction heating unit for heating the conductive member by induction and generating heat. The thickness of the conductive member in the fusing nip area is smaller than the thickness of the conductive member in other areas.

Abstract: A multi-function peripheral is provided. The multi-function peripheral comprises an image printing unit, an image scanning unit which is openably provided on the image printing unit and scans an image, and a ground unit which is electrically disconnected or connected by opening or shutting the image scanning unit from the image printing unit and delivers electrical noise generated from the image scanning unit to the image print unit via a shortened conductive path.

Abstract: An image fixing device of an image forming apparatus includes a pressure roller and a heating roller to rotate as if it is in contact with the pressure roller, with a paper fed therebetween, to fix a developed image to the paper by applying heat generated by a heating member installed inside therein. The heating roller is a heat pipe of a closed tube type. The heat pipe of the closed tube type has a fluid poured inside of a closed space thereof. The heating member is an induction heating body to generate a magnetic field to the heating roller. The heat generated by induction heating is applied to the heating roller including the heat pipe to keep a temperature around the surface thereof at a predetermined uniform level.

Abstract: A scanning device comprises a scanner body including a frame, a cover pivotably mounted to the scanner body so that it can be opened and closed, a scan unit mounted to the scanner body to scan an image of a document, and a grounding unit for grounding a noise radiated from the scan unit to the frame and thereby remove the noise. The grounding unit is selectively connected to the frame according to whether the cover is opened or closed. The connection distance between the grounding member and the frame is reduced as much as possible to prevent induction of radiated EMI by the grounding member, and to achieve effective grounding of the radiated EMI.

Abstract: A printed circuit board with EMI radiation suppression is disclosed. An integrated circuit and an RC filter are disposed and wired in the printed circuit board including a top layer and a bottom layer. The integrated circuit has a first ground pin and a clock pin for outputting a clock signal, and the RC filter eliminates high frequency components of the clock signal. A second ground pin as one end of a capacitor of the RC filter is disposed to face the first ground pin of the integrated circuit, and no wiring is formed in a current return path directly connecting the second ground pin to the first ground pin. According to the present invention, the RC filter is disposed and wired in consideration of the EMI radiation characteristics, so the EMI radiation can be suppressed.

Abstract: A fusing device of an image forming apparatus and method thereof are provided. The fusing device and method comprise a conductive member having a linear portion for contacting a printing medium; a fusing film for sliding on a circumference of the conductive member; a pressing roller for contacting the fusing film in the linear portion, forming a fusing nip area, and rotating the fusing film; and an induction heating unit for heating the conductive member by induction and generating heat, wherein the thickness of the conductive member in the fusing nip area is smaller than the thickness of the conductive member in other areas.

Abstract: A method of reducing consumption of a developer used in an electrophotographic processor that forms a latent electrostatic image on a charged photosensitive object using a laser exposure unit for outputting a laser beam, the method including adjusting a power of the laser beam to match a user-selected density of an output image so as to adjust an electric potential between an image region and a non-image region of the latent electrostatic image, wherein the consumption of the developer is reduced, and an electrophotographic processor performing the method.

Abstract: A multifunctional apparatus includes a first circuit board which is installed on a low surface of a main body, receives a current from an external power source and supplies the current to other circuit boards and devices; a second circuit board which is installed on a surface of the main body and includes a controller to control the other circuit boards and devices; and a third circuit board which is installed on an upper surface of the main body and supplies the current or transfers control signals to a scanning unit.

Abstract: A fusing device for an image forming apparatus including a cylindrical fusing roller, a pressure roller installed opposite to the fusing roller and pressing a sheet of paper passing therebetween, and an inductive heating element simultaneously heating the fusing roller and the pressure roller. The fusing device reduces the time to reach a fusing temperature by heating both the fusing roller and the pressure roller with a closed magnetic core extending between hollow portions of each.