be configured to deposit material on a substrate by activating the print heads simultaneously or sequentially fig7 is an exemplary load locked system according to an embodiment of the invention load locked system of fig7 includes a housing with inlet chamber 710 print head chamber 720 and outlet chamber 730 inlet chamber 710 communicates through gates 712 and 722 print head chamber 720 receives substrate 750 from the inlet chamber and deposits organic led material thereon as described in relation to fig6 gate 724 communicates substrate 750 to outlet chamber 730 after the printing process is completed the substrate exists outlet chamber 730 through gate 732 vacuum and pressure can be used to transport substrate 750 through the load locked system of fig7 to control transporting the substrate controller 770 communicates with nitrogen source 762 and vacuum 760 through valves 772 and 774 respectively controller 770 comprises one or more processor circuits not shown in communication with one or more memory circuit not shown the controller also communicates with the load locked housing and ultimately with the print nozzle in this manner controller 770 can coordinate opening and closing gates 712 722 724 and 732 controller 770 can also control ink dispensing by activating the piezoelectric element and or the heater see fig6 the substrate can be transported through the load locked print system through air bearings or by a physical conveyor under the control of the controller in an exemplary operation a memory circuit not shown of controller 770 provides instructions to a processor circuit not shown to i receive the substrate at the inlet partition ii purge the housing with the first gas iii direct the substrate to a discharge nozzle at the print head chamber iv energize the discharge nozzle to pulsatingly deliver a quantity.