Patent ID: 7467446
Filing Date: 2008-12-23
Classification: D04H

Abstract:
1. A system for hydroentangling a sheet of fabric material moving in a processing direction to form a nonwoven fabric, the system comprising an elongate hydroentangling jet strip comprising a plurality of nozzle orifices, each operatively positioned to direct a stream of hydroentangling fluid toward the sheet of fabric material, the plurality of nozzle orifices comprising: a first row of nozzle orifices spaced apart along the width of the elongate hydroentangling jet strip, each of the nozzle orifices in the first row having a first diameter; and a second row of nozzle orifices disposed downstream from the first row of nozzle orifices in the processing direction and spaced apart along the width of the elongate hydroentangling jet strip, each nozzle orifice of the second row of nozzle orifices being offset at a selected distance from the closest nozzle orifices of the first row of nozzle orifices along the width of the elongate hydroentangling jet strip such that a nozzle orifice of the second row is laterally offset between each pair of nozzle orifices of the first row, each of the nozzle orifices in the second row having a second diameter being smaller than the first diameter.