Low debris fluid jetting system

A printing system, comprising:

• a track constructed to transport substrates to be printed at a printing location defining a printing location plane;
• a print head having a front printing side having an orifice therethrough, the print head constructed to jet fluid through the orifice onto the substrates as they are transported to the printing location;
• the front side having a convex bulge with an orifice substantially at the top of the bulge and two slopes, an upstream slope and a downstream slope, descending in opposite directions from the top of the bulge, the orifice defining an orifice plane normal to the direction fluid will jet through the orifice, the orifice plane and the printing location plane being separated by a print gap;
• an air flow opening, and a blower constructed to blow air through the opening, located further from the printing location plane than the orifice plane, the air flow opening constructed to blow air onto the upstream slope, in a direction towards the orifice and the downstream slope.