Patent application number | Description | Published |
20090109267 | INK-JET IMAGE FORMING APPARATUS AND METHOD OF CONTROLLING INK FLOW - An ink-jet image forming apparatus. The ink-jet image forming apparatus includes a print head having a plurality of nozzles to eject ink, an ink tank to store the ink, an ink supply passage to supply the ink in the ink tank to the print head, an ink return passage to return the ink in the print head to the ink tank, a regulator mounted in the ink supply passage to regulate ink flow supplied to the print head, a shut-off valve mounted in the ink supply passage, between the ink tank and the regulator, to intercept ink flow supplied to the regulator, and an ink pump mounted in the ink return passage to forcedly flow the ink in the ink return passage. The ink pump is configured to be driven in forward and reverse directions so as to change an ink flow direction. Since the shut-off valve intercepts forcedly the ink flow in the ink supply passage, the ink in the ink tank is prevented from flowing abnormally to the print head and leaking from the print head. | 04-30-2009 |
20090141093 | IMAGE FORMING APPARATUS - An image forming apparatus including a body, a print head including a nozzle part having a length corresponding to a width of a printing medium, and a regulator provided separately from the print head and mounted to the body, the regulator serves to adjust a negative pressure of ink which is to be supplied into the print head. | 06-04-2009 |
20100053265 | ARRAY TYPE INKJET PRINT HEAD AND IMAGE FORMING APPARATUS HAVING THE SAME - An array type inkjet print head includes an ink cartridge to store ink, at least one print head chip disposed on a base of the ink cartridge to project from the base, the at least one print head chip to fire the ink, a flat plate cover disposed on the base of the ink cartridge and to have at least one opening corresponding to the at least one print head chip, and an adhesive member disposed between the base of the ink cartridge and the flat plate cover to fix the flat plate cover to the base of the ink cartridge. The flat plate cover is formed of either a metal material or a ceramic material. | 03-04-2010 |
20100171802 | INK CARTRIDGE AND INK CIRCULATION SYSTEM - An ink cartridge easily attached to and removed from an inkjet printer and an ink circulation system of the inkjet printer. The ink cartridge includes a plurality of print heads ejecting ink, an ink channel unit supplying ink to the plurality of print heads, at least one filter unit filtering ink supplied to the ink channel unit, and at least one septum unit connecting the ink channel unit, at least one filter unit, and the inkjet printer. The ink circulation system includes the ink cartridge, an ink tank storing ink to be supplied to the ink cartridge, at least one 3-way valve interposed between the ink cartridge and the ink tank to selectively control channel circulation and priming circulation, the channel circulation circulating ink in the ink channel unit and the priming circulation circulating ink in the at least one filter unit, and an ink pump interposed between the at least one 3-way valve and the ink tank for providing driving power for circulating ink. | 07-08-2010 |
20110043567 | WIPING ASSEMBLY AND IMAGE FORMING APPARATUS HAVING THE SAME - An inkjet image forming apparatus includes a main body frame, a medium supplying unit which is coupled to the main body frame and supplying a print medium, an image forming cartridge which is coupled to the main body frame, forms an image on the supplied print medium, and including a nozzle to eject ink, and a wiping assembly which wipes the nozzle. The wiping assembly includes a wiping sheet storage unit in which the wiping sheet is stored as being wound, a transfer shuttle which moves along arrangement of the nozzle by a driving force of a driving source, a pressing member which is provided in the transfer shuttle and presses a region of the wiping sheet against the nozzle to perform wiping using the wiping sheet, and a wiping sheet support unit which is provided in the transfer shuttle and restricts move of the wiping sheet while the nozzle is wiped. | 02-24-2011 |
20110043568 | SCRAPPING UNIT AND IMAGE FORMING APPARATUS HAVING THE SAME, AND CLEANING METHODS THEREOF - A scrapping unit and an image forming apparatus having the same, and cleaning methods thereof to improve a maintenance performance. The scrapping unit cleans a polluted member disposed in an image forming apparatus and stained by a polluting material. The scrapping unit may include an endless belt to circulate between an exposed position where a surface of the endless belt is exposed toward the polluted member, and a non-exposed position where the surface of the endless belt is not exposed with respect to the polluted member, and a belt support frame which includes a belt support surface to support the endless belt so that the endless belt can be unfolded in the exposed position, and a storing space to store the endless belt so that the endless belt can be folded in the non-exposed position. | 02-24-2011 |
20120045253 | Developing unit and image forming apparatus employing the same - A developing unit includes a toner storage portion containing toner and including a toner supply member, a development portion disposed above the toner storage portion and containing the toner supplied from the toner storage portion by the toner supply member, and including a developing roller and a supply roller to supply the toner to the developing roller, and a partition wall to divide the toner storage portion and the development portion, and including an opening portion disposed under the lowest portion of the supply roller and forming a path of the toner supplied from the toner storage portion to the development portion. | 02-23-2012 |
20120183332 | Image forming apparatus - An image forming apparatus includes a main body; at least one developer including an image carrier unit having an image carrier and a charged body charging the image carrier, a developing unit installed to swing at a predetermined angle with respect to the image carrier unit and having a developing roller, and a pressing member pressing the developing unit so that the developing roller comes in contact with the image carrier, and separably installed in the main body; a nip separation unit installed in the main body on one side of the developer to swing the developing unit so that the developing unit is in a position that is separated from the image carrier; and a control unit controlling the developer and the nip separation unit according to a print command. | 07-19-2012 |