| 摘要 |
PROBLEM TO BE SOLVED: To eliminate an ink leak regardless of a posture to enhance storage stability by constituting an ink tank of a first housing chamber having an ink supply port, an atmosphere communication port and a negative pressure generating member, a fine communication part and a second housing chamber and providing an ink damming-up wall between the atmosphere communication port and the negative pressure generating member. SOLUTION: A first housing chamber 5 houses a porous member 6 being a negative pressure generating member and has the ink supply port 7 to a recording head 1, the press part 13 of the porous member 6, atmosphere communication parts 15, 8 and the ink damming-up wall 18 to the atmosphere communication part 8. Further, a second housing chamber 9 is an ink supply chamber directly filled with ink from an ink filling port 10 and the second housing chamber 9 is hermetically closed by a ball 10A after the filling with ink and ink is supplied from the second housing chamber 9 to the first housing chamber 5 through the fine communication part 11 in the vicinity of the side end part of the ink supply port 7 of a partition wall 4 to be held to the state absorbed by the porous member 6. Terefore, an ink leak is not generated regardless of posture difference by a simple structure and storage stability can be improved. |
