| 摘要 |
<p>For the purpose of controlling the back pressure of an ink tank, a porous body (10) is arranged in an ink tank (11) in such a manner that the lower end of the porous body (10) contacts with an ink (21), and the ink (21) rises in the porous body (10) by capillary force. Upper end of the porous body (10) is not immersed into the ink (21) and a rising force acts on the ink (21) stored in the ink tank (11) to the maximum. Consequently, the ink (21) does not leak from a discharge head (3) located below the ink tank (11). Furthermore, the components of the ink (21) are less susceptible to degradation because the ink (21) accumulates lower in the porous body (10) and the amount of the ink (21) in contact with the porous body (10) is small.</p> |
