Patent ID: 6890053

Claim:
A positive air system, for a fluid jetting device, the fluid jetting device configured to jet a fluid therefrom in a fluid droplet path, the positive air system comprising: an enclosure having at least one wall defining a barrier and enclosing the fluid jetting device, the barrier defining a local environment, the at least one wall having a plurality of orifices formed therein, the orifices configured to direct a stream of pressurized air therefrom in a direction that diverges from the fluid droplet path such that the fluid droplet path and the pressurized air stream direction do not converge, wherein the pressurized air flowing from the orifices prevents the ingress of dust and debris to the fluid jetting device and further prevents the introduction of dust and debris into the fluid droplet path, and wherein the pressurized air flowing from the orifices does not interfere with the fluid moving through the droplet path.