Abstract: A hydrogen storage system is disclosed and includes a storage unit including a plurality of unit storage containers, in which metal hydride materials are respectively provided in an interior thereof and which are connected to each other in parallel, and a thermal fluid line defining a thermal fluid passage, which passes via the plurality of unit storage containers continuously and through which a thermal fluid flows for heating or cooling the unit storage containers, thereby enhancing a storage performance and an efficiency of the hydrogen.

Abstract: A hydrogen storage device includes a storage container having an accommodation space in an interior thereof, a first metal hydride material provided in the interior of the storage container and that stores hydrogen, and a second metal hydride material provided in the interior of the storage container and that stores the hydrogen at a pressure that is different from that of the first metal hydride material. An advantageous effect of restraining an excessive rise of a pressure of the storage container and enhancing safety and reliability may be obtained.

Abstract: Disclosed are an apparatus and a method for analyzing milk in a field, capable of analyzing the quality of milk by rapidly and easily examining components of milk in a field, other than a laboratory. To manage the quality of milk, a monochromator using an interference filter having different wavelength bands is employed to the apparatus for analyzing milk, and the amount of milk samples used at one time is increased, so components of milk are simultaneously examined. The apparatus for analyzing milk has a portable structure, so the components of milk are simply, rapidly and easily determined in the field, and the apparatus for analyzing milk is inexpensive as compared with existing apparatuses, thereby increasing the productivity.

Abstract: An image forming apparatus and method includes a controller to set a reference fusing temperature according to the print pattern of an input image received from an image input unit. The input image is converted to bitmap data to recognize the print pattern. The reference fusing temperature is set higher as the transition rate of the converted bitmap data increases. When printing an image whose print pattern has a low transition rate, the apparatus reduces the time required to print the first page of the image, thereby improving the print speed over the conventional apparatus.

Abstract: An image forming apparatus includes a laser scanning unit that irradiates a light. A photoconductive medium forms thereon an electrostatic latent image using the light from the laser scanning unit. A developing roller transfers a developer onto the electrostatic latent image formed on the photoconductive medium to develop the electrostatic latent image. A transferring roller forms a transfer nip in tight contact with the photoconductive medium and transfers the developer attached on the photoconductive medium onto a paper passing through the transfer nip. A paper supplying part stacks the paper thereon. A pickup roller picks up the paper stacked on the paper supplying part. A paper edge sensor senses a top edge of the paper picked up by the pickup roller. The paper picked up by the pickup roller is directly supplied toward the transfer nip. A paper moving path is reduced, thereby minimizing the whole size of the image forming apparatus. Also, the number of parts is reduced, thereby decreasing material costs.

Abstract: Disclosed are an apparatus and a method for analyzing milk in a field, capable of analyzing the quality of milk by rapidly and easily examining components of milk in a field, other than a laboratory. To manage the quality of milk, a monochromator using an interference filter having different wavelength bands is employed to the apparatus for analyzing milk, and the amount of milk samples used at one time is increased, so components of milk are simultaneously examined. The apparatus for analyzing milk has a portable structure, so the components of milk are simply, rapidly and easily determined in the field, and the apparatus for analyzing milk is inexpensive as compared with existing apparatuses, thereby increasing the productivity.

Abstract: An image forming apparatus and method includes a controller to set a reference fusing temperature according to the print pattern of an input image received from an image input unit. The input image is converted to bitmap data to recognize the print pattern. The reference fusing temperature is set higher as the transition rate of the converted bitmap data increases. When printing an image whose print pattern has a low transition rate, the apparatus reduces the time required to print the first page of the image, thereby improving the print speed over the conventional apparatus.

Abstract: A developer includes a developer frame in which a developing agent is contained, a development roller that is rotatably disposed inside the developer frame. Coupling means couples the development roller to the developer frame. The coupling means includes a gear member that is rotatably mounted to the developer frame and engages a first gear disposed outside the developer to transfer a rotational force. A development roller end portion rotates with the gear member in the same direction about the same rotational shaft as the gear member. An image forming apparatus includes a photosensitive medium on which an electrostatic latent image corresponding to an image to be printed is formed through light scanning and the developer, which applies a developing agent to the photosensitive medium to develop the image into a visible image.

Abstract: A warming-up method for an electrophotography image forming apparatus. The warming-up method includes the steps of turning on a heat source when the image forming apparatus is turned on or when a wake-up event is generated in a power saving mode, driving an image fix-related driving body for rotating a heated roller and a pressing roller, thereby heating the rollers; driving a main driving body and rotating an OPC drum after driving the image fix-related driving body; and stopping the sub-driving body and the main driving body when surface temperature of the heated roller and surface temperature of the pressing roller reach an objective temperature, respectively, by means of heat from the heat source and rotation of the heated roller and the pressing roller.

Abstract: An image forming apparatus includes a laser scanning unit that irradiates a light. A photoconductive medium forms thereon an electrostatic latent image using the light from the laser scanning unit. A developing roller transfers a developer onto the electrostatic latent image formed on the photoconductive medium to develop the electrostatic latent image. A transferring roller forms a transfer nip in tight contact with the photoconductive medium and transfers the developer attached on the photoconductive medium onto a paper passing through the transfer nip. A paper supplying part stacks the paper thereon. A pickup roller picks up the paper stacked on the paper supplying part. A paper edge sensor senses a top edge of the paper picked up by the pickup roller. The paper picked up by the pickup roller is directly supplied toward the transfer nip. A paper moving path is reduced, thereby minimizing the whole size of the image forming apparatus. Also, the number of parts is reduced, thereby decreasing material costs.

Abstract: A developer includes a developer frame in which a developing agent is contained, a development roller that is rotatably disposed inside the developer frame. Coupling means couples the development roller to the developer frame. The coupling means includes a gear member that is rotatably mounted to the developer frame and engages a first gear disposed outside the developer to transfer a rotational force. A development roller end portion rotates with the gear member in the same direction about the same rotational shaft as the gear member. An image forming apparatus includes a photosensitive medium on which an electrostatic latent image corresponding to an image to be printed is formed through light scanning and the developer, which applies a developing agent to the photosensitive medium to develop the image into a visible image.

Abstract: A printing apparatus includes a printing unit to print an image onto a recording sheet; a discharged sheet stacker positioned on the printing unit, in which sheets discharged from the printing unit are stacked; and a scanning unit positioned at the upper side of the discharged sheet stacker and moved from a first position to a second position to enlarge a stacking height of the discharged sheet stacker.

Abstract: A warming-up method for an electrophotography image forming apparatus. The warming-up method includes the steps of turning on a heat source when the image forming apparatus is turned on or when a wake-up event is generated in a power saving mode, driving an image fix-related driving body for rotating a heated roller and a pressing roller, thereby heating the rollers; driving a main driving body and rotating an OPC drum after driving the image fix-related driving body; and stopping the sub-driving body and the main driving body when surface temperature of the heated roller and surface temperature of the pressing roller reach an objective temperature, respectively, by means of heat from the heat source and rotation of the heated roller and the pressing roller.

Abstract: There is disclosed a second cassette feeding apparatus for an electrostatic image-forming system employed to increase sheet feeding capacity, including a cassette frame for secondary paper feeding, formed on one side of a main body of the electrostatic image-forming system, and having a pickup roller for picking up a sheet of paper, and a driving roller forming a relay roller to convey the paper to a registration roller of the main body; and a second paper cassette inserted into the cassette frame to store sheets of paper, and having a passive roller forming the relay roller with the driving roller.

Abstract: A secondary cassette feeder enhances the capacity of an image forming apparatus having a main body provided with a primary cassette feeder for introducing sheets of print media to the apparatus and a first pickup roller, disposed inside the main body and driven by a motor, for feeding the sheets of print media in accordance with a synchronizing signal. The secondary cassette feeder includes: a plurality of idler gears engaged with the first pickup roller; and a second pickup roller, engaged with the idler gears, for feeding auxiliary sheets of print media in accordance with the synchronizing signal. The secondary cassette feeder further includes a set of contiguous gears, engaged with at least one of the idler gears, for driving the second pickup roller. The contiguous gears are ganged together by a swing arm, the swing arm being biased by a spring anchored at an interior point of the secondary cassette feeder.

Abstract: A laser beam printer with variable paper feeding capacity includes a body having a cassette mounting portion with a paper feeding device and a cassette mounting rail, at the bottom thereof. This permits the use of a minimum capacity paper cassette and a large capacity paper cassette independently formed with paper holding portions of different capacities. The cassettes may each have a channel along which the cassette mounting rail slides, at both sides thereof, and a plate for supporting paper which receives elasticity from a spring. The printer may make use of a height compensation mechanism installed at the bottom of the body. This mechanism permits the height of the cassette mounting portion of the body to be higher, such as when the large capacity paper cassette is selectively used. Therefore, the printer is efficiently used by selectively employing the minimum capacity paper cassette and large capacity paper cassette, in accordance with usage environment of users.

Abstract: A door apparatus of a fixing unit includes a guide door hinged to one side of a frame of the fixing unit, so that the guide door can be opened horizontally, securing enough space for removing a jammed sheet. The frame comprises a plurality of bent plates formed at the one side thereof, each of the bent plates having a hinge hole, and the guide door comprises a plurality of extending plates formed at one side thereof, extending horizontally with respect to the bent plates, each of the extending plates having a hinge pin. The hinge pins are inserted into the hinge holes. Further, the door apparatus includes a U-shaped lock having a fixed end and a free end, formed on the opposite side of the guide door such that an outer side of the free end elastically contacts an inner face of the other side of the frame.

Abstract: A paper feed device for a duplex printing apparatus. The paper feed device includes a hinge link coupled to an end of a solenoid, an arm link extended upwards from the hinge link, a reverse guide coupled to the arm link by a guide hinge, a vertical link coupled to one side of the hinge link by a hinge, and a plurality of gears for changing the turning direction of rollers according to a print mode.

Abstract: A duplex electrophotographic device has a driving apparatus that is constructed using only one motor to drive the various gears and rollers of the electrophotographic apparatus. A main gear is driven by the motor. The main gear is engaged with a set of gears that are mounted on a rod that is pivotally mounted inside of the housing of the electrophotographic device. A solenoid is attached to one end of the rod to move the set of gears between a first and a second position. When the set of gears is in a first position a first assembly is engaged with the set of gears. This assembly rotates a first plurality of rollers to transport a sheet of paper in a first direction. While the set of gears is in a second position, the set of gears is engaged with a second assembly that rotates both a first and second plurality of rollers in a second direction.