Abstract: Provided is an annealing separating agent composition for a grain-oriented electrical steel sheet, a grain-oriented electrical steel sheet and a method for manufacturing a grain-oriented electrical steel sheet. The annealing separating agent composition for a grain-oriented electrical steel sheet according to an embodiment of the present invention contains 30 to 70% by weight of a calcium compound, and the remainder of magnesium oxide or magnesium hydroxide on a solid basis.

Abstract: An embodiment of the present invention relates to a porous silicon-based carbon composite, a method for preparing same, and a negative electrode active material comprising same. The porous silicon-based carbon composite according to an embodiment comprises silicon particles capable of intercalating and deintercalating lithium, a magnesium compound, and carbon, and satisfies a molar ratio (Mg/Si) of magnesium atoms to silicon atoms present in the composite of 0.02-0.30 and a molar ratio (O/Si) of oxygen atoms to silicon atoms in the composite of 0.40-0.90. Thus, when the porous silicon-based carbon composite is applied to a negative electrode active material, initial efficiency and capacity retention as well as discharge capacity can be enhanced.

Abstract: An inkjet image forming apparatus having an array type print head to stably deliver a printing medium through a printing zone. The inkjet image forming apparatus includes an array type print head including a nozzle part to discharge ink to a printing zone, a first rolling unit having a first nip portion to nip the printing medium, wherein the first nip portion is disposed before the printing zone to deliver the printing medium to the printing zone, and a second rolling unit having a second nip portion to nip the printing medium, wherein the second nip portion is disposed downstream of the first rolling unit in a delivery direction of the printing medium. A distance between the first nip portion and the second nip portion is less than or equal to 3 inches.

Abstract: An array type multi-pass inkjet printer head and an operating method thereof. The array type inkjet printer includes an image dividing unit to divide an image to be printed into a plurality of images, a printing unit having a head and to print one of the plurality of divided images on a printing medium using the head, the head being formed in a lateral direction and having a plurality of nozzles disposed in a longitudinal direction thereof, a feedback unit to reversely move the printing medium to a preceding end of the printing unit after the one of the plurality of divided images is printed by the printing unit, and a control unit to control the printing unit to print a divided image next to the printed one image on the reversely printing medium.

Abstract: An inkjet image forming apparatus having an array type print head to stably deliver a printing medium through a printing zone. The inkjet image forming apparatus includes an array type print head including a nozzle part to discharge ink to a printing zone, a first rolling unit having a first nip portion to nip the printing medium, wherein the first nip portion is disposed before the printing zone to deliver the printing medium to the printing zone, and a second rolling unit having a second nip portion to nip the printing medium, wherein the second nip portion is disposed downstream of the first rolling unit in a delivery direction of the printing medium. A distance between the first nip portion and the second nip portion is less than or equal to 3 inches.

Abstract: There are provided a print head wiper to wipe a nozzle surface of a print head where nozzles are formed to fire ink, an inkjet image forming apparatus including the print head wiper, and a method of maintaining the inkjet image forming apparatus. In the print head wiper, a first gear is capable of rotating in both clockwise and counterclockwise directions, a second gear is engaged with the first gear, a cleaning roller is fixed to the second gear to wipe the nozzle surface of the print head, and a link arm to connect the first gear and the second gear. When the first gear is rotated, the second gear and the cleaning roller may be revolved in an upward direction around the first gear by a frictional force between the first gear and the link arm until the cleaning roller makes contact with the nozzle surface, and then the second gear and the cleaning roller may be rotated about an axis of the second gear by a rotational force of the first gear to wipe the nozzle surface.

Abstract: An inkjet image forming apparatus includes a cap member, a wiper, a nozzle unit, and a platen. The cap member and the wiper face the nozzle unit and are located at a position lower than an upper surface of the platen that constitutes a paper delivery path. The platen is moveable to a printing position constituting a paper delivery path and a maintenance position that leaves the printing position such that the wiper and the cap member can access the nozzle unit.

Abstract: An ink-jet image forming apparatus includes an ink-jet head having a printbar provided with a plurality of nozzles to eject ink droplets, a steam sprayer to spray steam onto the printbar, and a wiper movable relative to the ink-jet head to wipe the printbar sprayed with the steam.

Abstract: An ink-jet image forming apparatus includes a main body, an ink-jet head mounted in the main body and provided with a nozzle part, and a cleaning device mounted movably along the nozzle part to clean the nozzle part. The cleaning device includes a roller to supply a cleaning liquid to the nozzle part, and a wiper to wipe the nozzle part. The ink-jet head includes a cleaning liquid nozzle to supply the cleaning liquid to the roller, and a cleaning liquid storage part to store the cleaning liquid.

Abstract: An inkjet printer is provided including a printing head which includes a nozzle unit with a length that corresponds to a width of paper to eject ink on the paper at a fixed position for printing an image. A capping unit ascends and descends between capping and uncapping positions. A guiding element is located below the printing head to support the paper and has an aperture through which the capping unit may access the nozzle unit. A moving guide moves between a first position to open the aperture such that the capping unit may be moved to the capping position and a second position to block the aperture.

Abstract: A multifunction peripheral in which a scanning unit and a printing unit can be driven by a single driving unit, including a printing unit which is movably installed in a main body of the multifunction peripheral to print a predetermined image onto a printing medium, a driving unit to drive the printing unit, a scanning unit which is movably installed in the main body of the multifunction peripheral to scan an image of a document placed on a document table, and a linking unit to link the scanning unit to the movement of the printing unit.

Abstract: An array type multi-pass inkjet printer head and an operating method thereof. The array type inkjet printer includes an image dividing unit to divide an image to be printed into a plurality of images, a printing unit having a head and to print one of the plurality of divided images on a printing medium using the head, the head being formed in a lateral direction and having a plurality of nozzles disposed in a longitudinal direction thereof, a feedback unit to reversely move the printing medium to a preceding end of the printing unit after the one of the plurality of divided images is printed by the printing unit, and a control unit to control the printing unit to print a divided image next to the printed one image on the reversely moved printing medium.

Abstract: An image forming apparatus includes a printing module that prints an image on a medium. A transfer unit transfers the medium. A rotating unit rotates the transfer unit such that first and second surfaces of the medium selectively face the printing module when the medium is pinched in the transfer unit.

Abstract: An inkjet image forming apparatus includes a printhead including a nozzle array having a plurality of nozzles arranged in a main scanning direction, an auxiliary printhead having an auxiliary nozzle to fire ink to assist the nozzles to print the image and capable of reciprocating in the main scanning direction, and a detecting unit formed integrally with the auxiliary printhead, and a control method of the inkjet image forming apparatus includes firing ink onto an ink firing position between ink dots printed by two neighboring nozzles in a high-resolution mode, and/or firing ink onto an ink firing position where a missing dot caused by a defective nozzle exists in a compensation mode.

Abstract: A hybrid image forming includes a first printing unit detachably mountable in the hybrid image forming apparatus and having a first printhead to print an image while performing a reciprocating motion in a width direction of a printing medium, and a second printing unit detachably mountable in the hybrid image forming apparatus and having a length at least as long as the width of the printing medium, and a mounting part to which each of the first printing unit and the second printing unit is detachably mountable.

Abstract: An ink cartridge assembly and an inkjet image forming apparatus having the same include a first ink cartridge and a second ink cartridge. The first ink cartridge has a shuttle type printhead to eject ink to form an image on a printing medium while reciprocating to the width direction of the printing medium at a printing position, and the second ink cartridge has an array type printhead to eject ink to form the image on the printing medium at the printing position in a stationary state. The first and second ink cartridges share the printing position. When the second ink cartridge is positioned on the printing position, the first ink cartridge is positioned at the first escape position and when the first ink cartridge is positioned on the printing position, the second ink cartridge is positioned at the second escape position away from the printing position and the first escape position.

Abstract: A head gap adjusting device includes a platen including a plurality of medium supporting projections to support a printing medium, the plurality of medium supporting projections formed on a surface of the platen facing an array type printhead having a nozzle array at least equal to or longer than a width of the printing medium, a moving element to move the medium supporting projections towards or away from the printhead to adjust the head gap, and a controller to control the moving element; and an inkjet image forming apparatus including the head gap adjusting device.

Abstract: An inkjet image forming apparatus includes a cap member, a wiper, a nozzle unit, and a platen. The cap member and the wiper face the nozzle unit and are located at a position lower than an upper surface of the platen that constitutes a paper delivery path. The platen is moveable to a printing position constituting a paper delivery path and a maintenance position that leaves the printing position such that the wiper and the cap member can access the nozzle unit.

Abstract: A thermal image forming apparatus is provided adapted to form images on both sides of a recording medium. The thermal image forming apparatus includes an image forming part having a recording head for forming an image on the recording medium and a support member facing the recording head and supporting the recording medium with respect to the recording head. The recording medium has a first side and a second side opposite to the first side. A position changing unit rotates the recording head around a shaft of the support member to move the recording head to first and second locations respectively facing the first and second sides of the recording medium.

Abstract: There are provided a print head wiper to wipe a nozzle surface of a print head where nozzles are formed to fire ink, an inkjet image forming apparatus including the print head wiper, and a method of maintaining the inkjet image forming apparatus. In the print head wiper, a first gear is capable of rotating in both clockwise and counterclockwise directions, a second gear is engaged with the first gear, a cleaning roller is fixed to the second gear to wipe the nozzle surface of the print head, and a link arm to connect the first gear and the second gear. When the first gear is rotated, the second gear and the cleaning roller may be revolved in an upward direction around the first gear by a frictional force between the first gear and the link arm until the cleaning roller makes contact with the nozzle surface, and then the second gear and the cleaning roller may be rotated about an axis of the second gear by a rotational force of the first gear to wipe the nozzle surface.