Abstract: An inkjet image forming apparatus including an array inkjet head including at least one head chip row, the at least one head chip having a plurality of head chips on which nozzles are formed; a light emitting unit including a light emitting device that is disposed on a first side of the head chip rows in a main scanning direction and radiates light; a light receiving unit including a light receiving device that is disposed on a second side of the head chip rows in the main scanning direction and faces the light emitting device to detect the light; and a malfunctioning nozzle detection unit that controls the array inkjet head to eject ink across the light and detects malfunctioning nozzles using detection signals received from the light receiving unit, wherein an alignment error angle between the light emitting unit and the light receiving unit is Arctan[(D?C)/A] or less when a length of the head chip rows in the main scanning direction is A, a gap between nozzles furthest from each other in a sub-scanning dir

Abstract: An inkjet printer having a suction function and a method of operating the inkjet printer includes a suction instrument that applies a suction force toward a platen so as to closely attach a printing medium to the platen during a printing operation and to suck spitted ink in a printing standby state.

Abstract: A hybrid inkjet image forming apparatus having a replaceable scanning unit includes an array type inkjet head unit and a shuttle type inkjet head unit. One of the array type inkjet head unit and the shuttle type inkjet head unit is fixed to a main body frame at a predetermined distance from an advancing path of the printing medium, and the other one of the array type inkjet head unit and the shuttle type inkjet head unit is detachably mounted to a unit mount provided on the main body frame and disposed along a side of the one of the array type inkjet head unit and the shuttle type inkjet head unit. The replaceable scanning unit is detachably mounted in the unit mount to scan image data from a medium.

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 image forming apparatus including an image printing unit formed above a printing path along which an image is formed on a print medium. The printing unit has an array inkjet printhead with a length corresponding to the width of a print medium and includes a plurality of nozzles to eject ink. The multi-functional device also includes an image scanning unit formed above the image printing unit with a scanning unit formed on a document reading path to transfer a document to scan and read the document and a missing nozzle detection unit which forms a missing nozzle detection path that connects the printing path and the document reading path, and transports a print medium on which a test image is formed by the array inkjet printhead, to the document reading path via the missing nozzle detection path to scan the test image using the scanning unit. The image scanning unit and the missing nozzle detection unit also share the scanning unit.

Abstract: An ink supplying/blocking device of an inkjet printer selectively supplies or blocks flow of ink of an ink tank to a channel unit in which print head is supported. The device may include a negative pressure generating unit to generate a negative pressure at the print head and thus supply a desired amount of ink to the print head through the channel unit; an ink supply tube to connect the negative pressure generating unit and the ink tank; a sealing unit to selectively open and close the ink supply tube; and a sensor to detect an operation status of the sealing unit. An image forming apparatus having the same is also disclosed.

Abstract: A hybrid inkjet image forming apparatus having a replaceable scanning unit includes an array type inkjet head unit and a shuttle type inkjet head unit. One of the array type inkjet head unit and the shuttle type inkjet head unit is fixed to a main body frame at a predetermined distance from an advancing path of the printing medium, and the other one of the array type inkjet head unit and the shuttle type inkjet head unit is detachably mounted to a unit mount provided on the main body frame and disposed along a side of the one of the array type inkjet head unit and the shuttle type inkjet head unit. The replaceable scanning unit is detachably mounted in the unit mount to scan image data from a medium.

Abstract: An inkjet head for discharging ink to print an image and an inkjet printer with the same are provided. The inkjet head includes an ink cartridge filled with ink. The inkjet head has a nozzle portion with a nozzle for discharging ink. A cap bracket is connected to the ink cartridge and pivotally moves between a first position which covers the nozzle portion and a second position which opens the nozzle portion. A cleaning member is provided to the cap bracket and contacts the nozzle portion to clean the nozzle portion during movement of the cap bracket.

Abstract: An inkjet printer includes a printing head with a length that corresponds to a width of a sheet of paper being printed upon. The printing head has a nozzle unit, and the nozzle unit has a plurality of nozzle plates. A cleaning device slides in a lengthwise direction of the printing head and forcibly absorbs and removes foreign matter stuck to the nozzle plates.