Patent ID: 6863387

Claim:
An ink supply for an inkjet printing system, the ink supply having one or more areas of relatively high air diffusion through one or more structures comprising the ink supply, the ink supply comprising one or more air diffusion barrier structures shielding each of said one or more areas of relatively high air diffusion from air diffusion, and a quantity of liquid unsaturated ink disposed in said ink supply, and wherein the ink supply includes a reservoir for holding the quantity of liquid unsaturated ink, a fluid interconnect for interconnecting to the printing system when the ink supply is installed in the printing system, wherein the one or more areas of relatively high air diffusion includes an ink flow path between the reservoir and the fluid interconnect, and wherein the one or more air diffusion barrier structures includes a first barrier structure for shielding the ink flow path from air diffusion from an external environment into the ink flow path, further comprising a chassis member fabricated of a material having a relatively high air diffusion rate, the chassis member having a fluid passage formed therethrough leading between a fluid interconnect port and an ink reservoir attachment, and wherein the first barrier structure shields the fluid passage.