Patent ID: 7438544

Claim:
Melt-blow head with a rectilinear row of nozzle bores ( 17 ) arranged in a nozzle bar ( 6 c ) of a nozzle assembly ( 6 ), said nozzle bores ( 17 ) serving to produce endless filaments formed from a melt, said nozzle bores ( 17 ) being associated with blowing slots ( 12 ), in the form of longitudinal slots, of two slot-plates for feeding blowing air at an angle to the nozzle bores ( 17 ) and to which nozzle bores ( 17 ) the melt is fed, via melt feed pipes ( 2 , 5 ) from one or more distribution bars ( 1 ) and via melt pipes ( 7 ) in a distribution block ( 6 b ) of the nozzle assembly ( 6 ), to those nozzle bores ( 17 ) in the nozzle bar ( 6 c ) which are to be fed with the melt, wherein the blowing slots ( 12 ) are supplied with the blow air through blow-air feed pipes ( 10 ) in a blow-air feed element ( 15 ) via blow-air distribution bores ( 11 ), characterized in that a spinning width of the melt-blow head is variable, the nozzle assembly ( 6 ) or at least parts thereof being exchangeable, wherein, irrespective of the spinning width, each of the melt feed pipes ( 5 ) of the distribution bar(s) ( 1 ) in the melt-blow head is connected to the melt pipes ( 7 ) in the distribution block ( 6 b ), and wherein, depending on the spinning width, only those blow-air distribution bores ( 11 ) associated with the nozzle bores ( 17 ) to be fed are connected to the blowing slots ( 12 ) via blow-air pipes ( 8 ) in the distribution block ( 6 b ) and, where appropriate, the other blow-air distribution bores ( 11 ) are closed.