| 摘要 |
PROBLEM TO BE SOLVED: To provide an ink cartridge with a ventilation filter from which ink is hard to leak even when temperature rises in a state where it is brought into contact with the ink, and the thermal expansion of air at the inside of a case and the evaporation of the ink are caused, thus the ink is pressed against the ventilation filter. SOLUTION: A ventilation filter 13 as the stacked body of a fluororesin porous membrane and a gas permeable supporting material is attached to a ventilation hole 14. In the ventilation filter 13, the surface facing the inside space of a case 1, and becoming the contact face with ink 2 is composed of a fluororesin porous membrane. COPYRIGHT: (C)2009,JPO&INPIT |
