Patent ID: 7159796

Claim:
A device for spraying at least one substance onto a medium, the device comprising: a supply of vector gas; at least one substance feed that communicates with a supply of said substance, the substance being sucked from the supply of said substance by suction established in a vicinity of said at least one substance feed by emission of said vector gas; at least one shutter that interrupts communication between said at least one substance feed and the supply of said substance; and at least two gas outlet orifices, from which said vector gas is emitted, said two gas outlet orifices being positioned such that a vector gas jet emitted from a first of said at least two gas outlet orifices meets another vector gas jet emitted from a second of said at least two gas outlet orifices, wherein the shutter comprises a gasket mounted on a hollow rod, the rod being closed at a bottom end, the gasket being capable of bearing via a top face against a shoulder of the rod, the rod having at least one substance admission orifice passing therethrough, the substance admission orifice being of a diameter that is smaller than or equal to the thickness of the gasket, said gasket being capable of coming into abutment via a bottom face against a stationary bearing wall when the hollow rod is pushed down, thereby causing the gasket to be compressed so as to open the substance admission orifice at least in part and enabling the substance to flow towards said at least one substance feed.