| 摘要 |
A printer comprising: a printhead having an ink inlet and an ink outlet; a pressure-regulating chamber having an outlet port connected to the ink inlet via an upstream ink conduit, the chamber containing ink at a first level below the printhead, wherein a headspace above the first level of ink is open to atmosphere; and a downstream ink conduit connected to the ink outlet and terminating above the first level of ink, the downstream ink conduit being open to atmosphere, wherein the downstream ink conduit comprises a loop section passing below the first level of ink, such that, in a printing configuration, a second level of ink in the loop is equal to the first level of ink in the chamber.
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