| 摘要 |
An ink supplying unit and an inkjet image forming apparatus using the same are provided to effectively remove bubbles and a gas component causing injection inferiority of a print head. An ink supplying unit includes an ink reservoir(101), a print head(111) to eject ink introduced from the ink reservoir through an ink passage to a printing medium to print an image and an ultrasonic generator(350) disposed at a side of the ink reservoir to generate an ultrasonic wave to remove a gas component from the ink stored in the ink reservoir to separate the gas component into an empty space(101a) of the ink reservoir. The ink supplying unit further includes a vacuum pump(310) connected to the empty space of the ink reservoir through ink passages(304,306,307,331) to remove the gas component separated into the empty space of the ink reservoir to the outside. The ink supplying unit further includes a needle valve(315) disposed in the ink passage between the ink reservoir and the vacuum pump to maintain the ink reservoir in a predetermined negative pressure.
|
