Patent ID: 7931765

Claim:
A system for applying a binder to an airborne flow of fibres, the system comprising: means ( 102 ; 401 ) for applying a binder solution comprising binder droplets ( 203 ) to an airborne flow of fibres ( 202 ) received from a dryer 101 ), characterized in that said system further comprises at least one ultrasound device ( 301 ) adapted, during use, to apply ultrasound to the airborne flow of fibres ( 202 ) before the binder solution is applied whereby fibre lumps, if any, in the airborne flow of fibres ( 202 ) are separated, or substantially at the same time that the binder solution is applied whereby fibre lumps, if any, in the airborne flow of fibres ( 202 ) are separated and binder droplets are reduced to a smaller size.