| 摘要 |
PURPOSE:To obtain an ink jet cartridge capable of controlling an ink pressure in a recording head almost constant by a simple construction, coping with an environmental change, and always stably supplying ink for ensuring a good image quality. CONSTITUTION:An ink chamber 1 is connected to a recording head 3 through a connecting path 2. An ink holding member 6 having a capillary force is connected to the ink chamber 1 through an introducing wick 7. When ink is held in the ink holding member 6, the introducing wick 7 serves as an ink flow path between the ink holding member 6 and the ink chamber 1, and a negative pressure is kept constant by the capillary force of the ink holding member 6. In the absence of ink in the ink holding member 6, an ink meniscus is formed on the introducing wick 7, and the increase of a negative pressure is offset by the production of bubbles for keeping a negative pressure in the ink chamber 1 constant. If air in the ink chamber 1 expands, ink is moved from the ink chamber 1 to the ink holding member 6 through the introducing wick 7, thereby being prevented from leaking. |
