Patent ID: 7757964

Claim:
An air cap for keeping a spray nozzle that produces a flat spray clean, said air cap comprising a single slit and an interior volume adapted to at least partially contain the nozzle, the air cap being adapted to allow the flat spray from the nozzle, and an air flow flowing in the same direction as the flat spray, to flow through the interior volume and the single slit of the air cap, wherein the air cap is divided into a back component, wherein the back component comprises an internal thread for holding the nozzle and a front component comprising the single slit, guiding portions, and at least one drainage hole, wherein the front component and the back component are rotatable relative to one another via sliding surfaces and wherein the guiding portions comprise flat guiding surfaces constructed to co-act with guiding surfaces on the nozzle to keep the single slit in the front component aligned with the flat spray from the nozzle by preventing the front component guiding surface from being rotatable relative to the nozzle guiding surface, wherein at least one air recess is provided in the internal thread of the back component as well as in the interior wall of the sliding surface, wherein the air recess comprises a slot in the interior wall of the back component that is the length of the back component.