Patent ID: 6311467
Filing Date: 2001-11-06
Classification: D02G

Abstract:
In a method for producing a filament yarn with alternating S- and Z-twists comprising the steps of: clamping at least one yarn at two spaced apart twisting stops, applying through at least one false twisting unit stationarily arranged between the twisting stops alternately S- and Z-twists, and fixing the twists by means of a thermo-fixing unit positioned downstream of the false twisting unit in yarn advancing direction, wherein the improvement comprises the steps ofbringing the first of said two twisting stops arranged downstream of the false twisting unit in clamping engagement with the yarn, thereby stopping the twisting at the clamped location;advancing synchronously said first twisting stop and the yarn clamped thereto through the fixing unit, until at least the twisting inversion point in the yarn is fixed;bringing at least one further twisting stop following the aforementioned first twisting stop into clamping engagement with the yarn, thereby stopping the twisting at the clamped location; andadvancing said further twisting stop and the yarn clamped thereto through the fixing unit, before the yarn is twisted in an opposite direction by the false twisting unit.