Patent ID: 6517189
Filing Date: 2003-02-11
Classification: B41J

Abstract:
An ink jet print device comprising:a head formed with a plurality of nozzles and a common ink chamber in fluid communication with each of the nozzles, each nozzle being formed with an orifice through which an ink droplet is ejected, the common ink chamber having a first end and a second end; a sub ink tank that stores ink and supplies the ink to the nozzles; a main ink tank that stores ink and supplies the ink to the sub ink tank; a first switching valve provided to the first end of the common ink chamber, the first switching valve being selectively switched to an opening condition where the common ink chamber is in fluid connection with the sub ink tank and a closed condition where the common ink chamber is in fluid disconnection from the sub ink tank; and a second switching valve provided to the second end of the common ink chamber, the second switching valve being selectively switched to a first condition where the common ink chamber is in fluid connection with the sub ink tank and fluid disconnection from the main ink tank and a second condition where the common ink chamber is in fluid connection with the main ink tank and fluid disconnection from the sub ink tank, wherein the sub ink tank supplies the ink to the nozzles through the common ink chamber, and the main ink tank supplies the ink to the sub ink tank through the common ink chamber.