Patent ID: 6134759
Filing Date: 2000-10-24
Classification: D02G,D02J

Abstract:
An apparatus for fluid treatment of yarn comprising a nozzle block, a yarn passage formed in the nozzle block, said yarn passage having a yarn inlet and a yarn outlet in said nozzle block, and having a fluid passage formed in said nozzle block provided with a fluid inlet in the outer surface of said nozzle block and a fluid outlet in an inner wall surface of said yarn passage, wherein said fluid passage comprises a substantially straight passage and an expanding passage communicating with said yarn passage, and wherein(i) said substantially straight passage is formed in such a manner that the area and form of said fluid passage, as viewed in a section crossing the axis line of said fluid passage are substantially constant throughout a range along the axial direction of said fluid passage, and wherein(ii) said expanding passage is positioned downstream of said substantially straight passage and is formed in such a manner that the width of said fluid passage in the direction parallel to a reference line is gradually increased from the end of said substantially straight passage to the fluid outlet in a reference plane, where said reference line is a line parallel to a second axial line; said reference plane is a plane containing a first axial line and said reference line; said first axial line is the axial line of said substantially straight passage; and said second axial line is the axial line of the yarn passage, and further wherein(iii) the length of said substantially straight passage in the direction of said first axial line in said reference plane, the width at the end of said substantially straight passage in the direction parallel to said reference line, and the length of said expanding passage in the direction of said first axial line satisfy the following formula (I):Ls>Le>2 .times.WaSp (I)wherein Ls represents the length of said substantially straight passage, Le represents the length of said expanding passage, and WaSp represents the width at the end of said substantially straight passage.