| 摘要 |
In one embodiment, a system for delivering liquid to a printhead at a first elevation. The system includes a reservoir to hold liquid at a second elevation, which is below the first elevation. A pump delivers liquid from the reservoir to the printhead through a first line. A bypass valve diverts liquid from the first line when a pressure in the first line exceeds a predefined pressure. A vent coupled to the printhead at or above the first elevation vents the printhead to atmospheric pressure when the pump is off. |
