A printing system comprising: a gas enclosure for housing the printing system ; a substrate support apparatus in the gas enclosure ; a printhead device assembly in the gas enclosure , the printhead device assembly having a printhead, wherein the printhead device assembly is mounted to a motion system configured to move the at least one printhead relative to a substrate when supported by the substrate support apparatus ; a local ink delivery system in the gas enclosure and mounted to the motion system separately from and proximal the printhead device assembly and operably connected to the printhead device assembly , wherein the local ink delivery system comprises: a local ink dispensing reservoir , wherein the local ink dispensing reservoir in flow communication with the printhead; a local ink replenishment reservoir in flow communication with the local ink dispensing reservoir , configured to maintain a constant level of ink in the local ink dispensing reservoir ; and a bulk ink delivery system located exterior to the gas enclosure , wherein the bulk ink delivery system is in flow communication with the local ink replenishment reservoir , and is configured to maintain a sufficient level of ink in the local ink replenishment reservoir , the bulk ink delivery system being in flow communication with the local ink replenishment reservoir by a double conduit system. a gas enclosure for housing the printing system ; a substrate support apparatus in the gas enclosure ; a printhead device assembly in the gas enclosure , the printhead device assembly having a printhead, wherein the printhead device assembly is mounted to a motion system configured to move the at least one printhead relative to a substrate when supported by the substrate support apparatus ; a local ink delivery system in the gas enclosure and mounted to the motion system separately from and proximal the printhead device assembly and operably connected to the printhead device assembly , wherein the local ink delivery system comprises: a local ink dispensing reservoir , wherein the local ink dispensing reservoir in flow communication with the printhead; a local ink replenishment reservoir in flow communication with the local ink dispensing reservoir , configured to maintain a constant level of ink in the local ink dispensing reservoir ; and a bulk ink delivery system located exterior to the gas enclosure , wherein the bulk ink delivery system is in flow communication with the local ink replenishment reservoir , and is configured to maintain a sufficient level of ink in the local ink replenishment reservoir , the bulk ink delivery system being in flow communication with the local ink replenishment reservoir by a double conduit system. a local ink dispensing reservoir , wherein the local ink dispensing reservoir in flow communication with the printhead; a local ink replenishment reservoir in flow communication with the local ink dispensing reservoir , configured to maintain a constant level of ink in the local ink dispensing reservoir ; and a bulk ink delivery system located exterior to the gas enclosure , wherein the bulk ink delivery system is in flow communication with the local ink replenishment reservoir , and is configured to maintain a sufficient level of ink in the local ink replenishment reservoir , the bulk ink delivery system being in flow communication with the local ink replenishment reservoir by a double conduit system. <EOS>