METHOD FOR REMOVING BUBBLE IN INK SUPPLYING PASSAGE FOR INK JET RECORDER, AND INK JET RECORDER SUITABLE FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To remove bubbles entering a fluid passage in a recording head by a small quantity of ink. ;SOLUTION: An air hole 8a of an ink cartridge 8 connected to an ink jet recording head 7 is sealed and a negative pressure generated by an ink suction pump 11 is applied to the recording head 7 via a capping device 10. Ink is forced to be discharged from the recording head 7 until the inner pressure of the ink cartridge 8 becomes equal to a suction pressure of the ink suction pump 11, then the bubbles are discharged outside by virtue of the ink flow. After that the pressure of the ink in the ink cartridge 8 is reduced to the suction pressure so that a degassing degree is raised.;COPYRIGHT: (C)1998,JPO