Patent ID: 7114226

Claim:
An after-treatment needle ( 1 ) for flat textile products, comprising an axially elongated needle body ( 2 ) having at one end a clamping part ( 4 ) and at another end a working part ( 5 ) provided with n number of edges ( 6 , 7 , 8 , 10 ) extending in the axial direction of the needle body ( 2 ) and having a cross-sectional height of less than 0.35 mm, wherein n equals to or is greater than three, and adjoining barbs ( 12 , 13 ) arranged at least at two edges ( 6 , 7 ); the adjoining barbs ( 12 , 13 ) have a depth which is less than 0.02 mm and are arranged pair-wise in the same axial position or on a helical line, whose pitch (G) is less than n times the length of the barb ( 12 ).