A valve device is incorporated within a printhead (20) of an ink-jet pen (10) for regulation of ink flow and pressure within the printhead. The valve device includes a valve member (110) comprising a resiliently deformable flap positioned in an ink channel (128a, 128b), adjacent a firing chamber (132). The flap is deflectable into and out of a position to regulate ink flow and pressure both to and from the ink firing chambers. IMAGE
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