Method and device for applying an adhesive to a product surface

A device for applying an adhesive in the form of a spiral-shaped thin stream of adhesive spray, having a housing embodied for receiving the adhesive delivered by a piston unit, having a spray head arranged thereon, which is connected with an air injection device and has a nozzle body, which is provided with bores, which are arranged distributed in respect to each other over the circumferential direction and are oriented obliquely in the direction of the exiting thin stream of spray, on which at least one air jet is to act,

• characterized in that
• for achieving an air jet, which is expelled in an accelerated manner and is directed onto the thin stream of adhesive spray (6), an air nozzle (10) with an interior chamber (10′), which is embodied convergent-divergent in the flow-through direction, can be respectively inserted into the bores (20, 20′), which can be charged with air via an associated air conduit (26), or that the interior chamber (20″), which is oriented in the flow-through direction, of the single bore (20′) is embodied to be convergent-divergent.