Patent ID: 7051954

Claim:
An external mixing nozzle, for use in coating pharmaceutical products with liquid material like a colorant, with a flat-jet cap which is fastened to a nozzle body, the flat-jet cap being provided with a central bore, pointing towards the nozzle body, for receiving a liquid guiding insert, and having a central orifice which receives a mouth attachment of the liquid insert, at the same time defining an annular gap surrounding the mouth attachment, the flat-jet cap defining a planar surface portion which runs perpendicularly to the axis of the nozzle body and over an entire width of the flat-jet cap and within which the central orifice is provided, and, furthermore, the planar surface portion having adjoining it laterally two surfaces running essentially mirror-symmetrically and obliquely to the axis of the nozzle body and adjoining the planar surface portion, wherein the flat-jet cap contains, in the region of the planar surface portion, outlet orifices which are provided at an equal distance from the central orifice and which communicate with bores provided so as to run in the flat-jet cap obliquely to the axis of the nozzle body, the transitions from the planar surface portion to the lateral surfaces being defined by smooth transitions or roundings such that an airflow for reacting upon and for controlling a liquid material jet emerging from said liquid guiding insert is blown out via the annular gap and via the outlet orifices.