Drain conduit extends into the bottom of the ink cartridges; Vent conduit one end extends into the Ink Level in the ink bottle, other end has preset the ink to fill to the predetermined level of the ink cartridge; Pressure the bottle twice; Vent conduit provides the air to enter within the ink bottle, By formation a nature convective circulation between in the drain conduit and vent conduit, When the ink fill full, will be auto-stop the filling.