METHOD FOR INJECTING LIQUID, AND LIQUID-INJECTING APPARATUS WHERE THE METHOD IS USED

摘要

PROBLEM TO BE SOLVED: To prevent undesired air bubbles from mixing in a recording head by supplying a liquid to a liquid storage part through a liquid discharge part of the recording head filled with the liquid and discharging the inside air to the outside through a communication hole. SOLUTION: This liquid-injecting apparatus stores inside an ink tank case 2 an ink-absorbing body 4 for absorbing an ink to be filled. A recording head 6 is molded together with the ink tank case 2. A connection member 8 is selectively kept in tight touch with an ink discharge opening formation face 6a of the recording head 6, to which an injection pump 10 is connected via an ink feed passage 14. Moreover, an ink feed passage 16 is connected in the middle of the ink feed passage 14 to communicate with an ink feed tank 12. An ink INK is stored by a predetermined amount in the ink feed tank 12 through the ink discharge opening formation face 6a of the recording head 6. The air in the ink tank case 2 is discharged outside via a communication hole 2a at an upper part of the ink tank case 2.