Patent ID: 7707699

Claim:
Device for air interlacing ( 10 ) of a yarn (Y), comprising: an interlacing duct ( 21 , 22 , 23 , 24 ) for the passage and guidance of said yarn through said device ( 10 ), said interlacing duct ( 21 ) having an interlacing chamber ( 24 ), a first entrance channel ( 22 ) for receiving the yarn (Y) at the entrance of said device and feeding it to said interlacing chamber ( 24 ), and a second exit channel ( 23 ) for receiving the yarn from said interlacing chamber ( 24 ) and releasing it at the exit of said device, said interlacing chamber being delimited by a first emitting wall ( 24 a ) bearing a nozzle ( 26 ) for the emission of a jet of compressed air ( 31 ) inside said interlacing chamber ( 24 ), and by a second deflecting wall ( 24 b ), opposite the first wall ( 24 a ) and having a concave shape, which is suitable for receiving and deflecting the jet of compressed air ( 31 ) emitted by the nozzle ( 26 ) and intersecting the yarn to be interlaced, wherein said interlacing chamber ( 24 ) has a transverse section, with respect to the feeding path ( 11 ) of the yarn (Y) through the device ( 10 ) and as defined by the concave shape of said second deflecting wall, which is greater than that of each of said two channels ( 22 , 23 ).