Abstract: An apparatus to correct a white line of an ink-jet printer and a method to control the apparatus including driving a pickup roller when a printing command is inputted to pickup a paper; judging whether the leading end of the paper enters or not using a paper-detection sensor; judging a corresponding overfeeding amount and overfeeding position in accordance with the type of the paper; sequentially implementing the printing and feeding in accordance with a preset printing width; and implementing the printing using dummy nozzles which are not used in the printing of the sequential implementing operation, in such a way that the printing is performed for the overfeeding amount judged in the judging operation as well as for the printing width in the sequential implementing operation, when the line positioned just before the overfeeding position judged in the judging operation is printed.

Abstract: An inkjet printer includes a resistance element with which a front end of the paper becomes in contact so that a paper on a top of the stack of papers is separated from the stack of papers and picked up from a cassette, an angle conversion unit which changes an inclination angle of the resistance element with respect to the front end of the paper, and a switching gear which is moved by a carriage to a first position to feed the paper and to a second position to drive the angle conversion unit.

Abstract: Provided a paper feeding apparatus used with a printer includes a pickup roller which draws out a paper stacked in a cassette and conveys the paper to a printer, a conveying roller which conveys the drawn-out paper onto a paper feeding route, and a feeding roller which feeds the paper conveyed by the conveying roller to a printing portion. The conveying roller is driven when the paper supplied by the pickup roller is conveyed to the feeding roller, and after the paper is conveyed to the feeding roller, the conveying roller is isolated from the paper feeding route.

Abstract: An inkjet printer includes a resistance element with which a front end of the paper becomes in contact so that a paper on a top of the stack of papers is separated from the stack of papers and picked up from a cassette, an angle conversion unit which changes an inclination angle of the resistance element with respect to the front end of the paper, and a switching gear which is moved by a carriage to a first position to feed the paper and to a second position to drive the angle conversion unit.

Abstract: A printing apparatus and a method to pick up paper using the printing apparatus.

Abstract: A maintenance apparatus of an inkjet printer includes a control unit to control a drive motor for a wiping member convey unit to be in contact with a stopper two or more times in order to prevent a wiping member and a wiper disposed therein from being erroneously positioned due to an abnormal repulsive force occurring in the wiping member convey unit when the wiping member convey unit comes in contact with the stopper, due to outer impact and changes in load of the motor. The wiper-positioning method includes a first contact operation of driving the motor for the wiping member convey device to come in contact with the stopper, and a re-contact operation of controlling the motor for the wiping member convey unit to be in contact with the stopper one or more times again.

Abstract: An apparatus to correct a white line of an ink-jet printer and a method to control the apparatus including driving a pickup roller when a printing command is inputted to pickup a paper; judging whether the leading end of the paper enters or not using a paper-detection sensor; judging a corresponding overfeeding amount and overfeeding position in accordance with the type of the paper; sequentially implementing the printing and feeding in accordance with a preset printing width; and implementing the printing using dummy nozzles which are not used in the printing of the sequential implementing operation, in such a way that the printing is performed for the overfeeding amount judged in the judging operation as well as for the printing width in the sequential implementing operation, when the line positioned just before the overfeeding position judged in the judging operation is printed.

Abstract: A maintenance apparatus of an inkjet printer includes a control unit to control a drive motor for a wiping member convey unit to be in contact with a stopper two or more times in order to prevent a wiping member and a wiper disposed therein from being erroneously positioned due to an abnormal repulsive force occurring in the wiping member convey unit when the wiping member convey unit comes in contact with the stopper, due to outer impact and changes in load of the motor. The wiper-positioning method includes a first contact operation of driving the motor for the wiping member convey device to come in contact with the stopper, and a re-contact operation of controlling the motor for the wiping member convey unit to be in contact with the stopper one or more times again.

Abstract: A print head cleaning apparatus of an ink jet printer and an ink jet printer having the same, disposed to be movable between a printing position to eject ink from an ink injection nozzle to print an image on a paper sheet and a cleaning position to clean the ink injection nozzle. The print head is cleaned at the cleaning position using ultrasonic waves. The print head cleaning apparatus is fixed to the printer. The print head is moved to the print head cleaning apparatus and is then cleaned by the print head cleaning apparatus. Therefore, the print head is moved using an existing carrier transferring unit without a separate driving device to drive the print head, thereby facilitating the cleaning operation.

Abstract: Provided a paper feeding apparatus used with a printer includes a pickup roller which draws out a paper stacked in a cassette and conveys the paper to a printer, a conveying roller which conveys the drawn-out paper onto a paper feeding route, and a feeding roller which feeds the paper conveyed by the conveying roller to a printing portion. The conveying roller is driven when the paper supplied by the pickup roller is conveyed to the feeding roller, and after the paper is conveyed to the feeding roller, the conveying roller is isolated from the paper feeding route.

Abstract: A print head cleaning apparatus of an ink jet printer and an ink jet printer having the same, disposed to be movable between a printing position to eject ink from an ink injection nozzle to print an image on a paper sheet and a cleaning position to clean the ink injection nozzle. The print head is cleaned at the cleaning position using ultrasonic waves. The print head cleaning apparatus is fixed to the printer. The print head is moved to the print head cleaning apparatus and is then cleaned by the print head cleaning apparatus. Therefore, the print head is moved using an existing carrier transferring unit without a separate driving device to drive the print head, thereby facilitating the cleaning operation.

Abstract: An electrical contacting apparatus in an ink jet printer includes a plurality of spring elastic members corresponding to the contact portions of the ink cartridge. Each of the spring elastic members includes a contact portion which contacts a contact portion of the ink cartridge, a base having one end electrically connected to the printed circuit board, and a connection portion connected to the contact portion and the base for providing an elastic restoration force between the contact portion and the base. According to this structure, the contact resistance at the contact surface of a spring elastic member which contacts each of the contact portions of the ink cartridge is reduced, thereby improving the quality of printing.

Abstract: A service station device of a head for inkjet printer placed out of a printing area includes a wiper for cleaning the head, an operating lever operated by a carriage part moved to a service area, an elastic member for returning the operating lever when the carriage part is moved to a printing area, a rotating force transmitting part for changing the movement of the operating lever into a rotating force to transmit it, and a cap part reciprocating by the rotating force to be in contact with a head surface by ascending when the carriage part is moved to the service area. Here, a driving part for driving the wiper and cap is formed by a cleaning part having a wiper gear, the operating lever and the wiper, and a closing part having a cap gear, a vertical rack and the cap. A carriage moved side to side is utilized during printing to sequentially carry out the cleaning and closing functions.