Patent ID: 8585388

Claim:
An apparatus for the production of a non-woven fabric of filaments, comprising a spinneret ( 2 ) to extrude a plurality of filaments ( 11 ), a cooling chamber ( 10 ) to cool said filaments by means of cooling air flows, a stretching duct ( 18 ) located below the cooling chamber ( 10 ) to stretch said filaments ( 11 ), means for depositing the stretched filaments on a support ( 28 ), inlet means ( 15 , 15 A) for at least one cooling air flow (Y, X) which crosses said filaments at least twice, in two different positions of the plurality of filaments ( 11 ), wherein said extrusion spinneret comprises a plurality of extrusion holes ( 6 ) from which are extruded two groups of the filaments ( 11 ) that are initially substantially parallel with each other, said extrusion holes being distributed in at least two spaced groups ( 7 , 8 ) to define an area ( 9 ) of the spinneret ( 2 ) without the extrusion holes ( 6 ) and an intermediate area ( 13 ) that is located below said portion of the spinneret ( 9 ) without the extrusion holes ( 6 ) and is a free space of the cooling chamber ( 10 ) without filaments, and in that said cooling chamber comprises inlet means for said at least one flow of cooling air directed towards said intermediate area ( 13 ) by crossing one of the two groups of filaments ( 11 ), and outlet means ( 14 , 14 a ; 70 , 70 A) for removal of at least part of said cooling air flow or flows from said cooling chamber, said at least one flow of cooling air (Y) re-crossing the one of the two groups of filaments from said intermediate area ( 13 ), said outlet means ( 14 , 14 a ; 70 , 70 A) being located above said inlet means ( 15 , 15 A).