Patent ID: 7070256

Claim:
A portable ink jet printer comprising: an elongate pagewidth printhead having a plurality of ink supply passages, an elongate pagewidth ink distribution manifold connected to said printhead and substantially coextensive therewith, the manifold including a plurality of ink outlets corresponding to said ink supply passages on the printhead, and further including a plurality of ink inlets positioned along the manifold, an elongate pagewidth ink supply unit connected to said manifold and substantially coextensive therewith and including at least one elongate pagewidth storage chamber for holding ink for supply to said manifold, said storage chamber including a series of baffles spaced along the storage chamber and extending in a transverse direction so as to define chamber portions each including a hole aligned with said ink inlets and via which ink in the chamber portions can flow to the manifold, the baffles acting to reduce excessive acceleration of ink along the storage chamber from one said chamber portion to another as may be induced by movement of the portable printer, whilst allowing for flows of the ink from said chamber portions to the manifold inlets via said holes in response to active demand from said printhead.