Internal pressure-stabilizing apparatus, ink tank and ink-jet printer including the same

摘要

An ink tank (11) includes an ink chamber (31) and a pressure-adjusting tube (22) communicated therewith. Low liquid-repellent areas (41) and high liquid-repellent films (40) having liquid repellence higher than that of the low liquid-repellent areas are formed alternately in the extending direction of the tube (22). A difference in air pressure between both sides of a movable liquid, required for the liquid to enter the high liquid-repellent film when the liquid exists on the low liquid-repellent area disposed adjacently to the high liquid-repellent film on an atmospheric air side, is larger than that of a movable liquid required for the liquid to enter the high liquid-repellent film when the liquid exists on the low liquid-repellent area disposed adjacently to the high liquid-repellent film on an ink chamber side. It is possible to suppress the fluctuation of the internal pressure of the ink chamber (31) of an ink-jet printer by using a simple structure.