Method and device for improving a yarn produced in the rotor of an open-end spinning apparatus
AssigneeW. Schlafhorst AG & Co.
InventorHeinz-Georg Wassenhoven
Life of this patent
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Abstract
A method and a device for improving a yarn produced with genuine twist in the rotor of an open-end spinning apparatus directs the yarn through a yarn take-off nozzle in a given yarn travel direction. The yarn is subsequently diverted from the given yarn travel direction first to one side and then back to the opposite side over false-twist edges disposed obliquely relative to the given yarn travel direction including a last false-twist edge. Outer fiber ends of the traveling yarn are spread radially apart after passing the last false-twist edge. The yarn is subsequently passed through a pair of delivery rollers.
Claims9
Method for improving a yarn produced with genuine twist in the rotor of an open-end spinning apparatus, which comprises initially directing the yarn through a yarn take-off nozzle centrally disposed relative to the rotor in a yarn travel direction, subsequently guiding the yarn straight and substantially centrally relative to the rotor in a given withdrawal direction, subsequently diverting the yarn laterally in a given plane into a first direction forming a given angle with the given withdrawal direction over first false-twist edges disposed obliquely relative to the yarn travel direction, subsequently diverting the yarn in the given plane into a second direction forming an angle with the given withdrawal direction smaller than the given angle over a last false-twist edge disposed obliquely relative to the yarn travel direction, imparting a false-twist onto the traveling yarn leading to fiber spreading yarn movements and/or oscillations spreading outer fiber ends of the traveling yarn radially apart after passing the last false-twist edge, and subsequently passing the yarn through a pair of delivery rollers in the second direction.
Device for improving a yarn produced with genuine twist in the rotor of an open-end spinning apparatus, comprising a yarn take-off nozzle disposed centrally relative to the rotor through which the yarn is initially directed in a yarn travel direction and after which the yarn is directed straight and substantially centrally relative to the rotor in a given withdrawal direction, first false-twist edges disposed obliquely relative to the yarn travel direction downstream of said yarn take-off nozzle over which the yarn is diverted laterally in a given plane into a first direction forming a given angle with said given withdrawal direction, a last false-twist edge disposed obliquely relative to the yarn travel direction downstream of said first false-twist edges over which the yarn is diverted in said given plane into a second direction forming an angle with said given withdrawal direction being smaller than said given angle, a pair of delivery rollers forming a clamping point through which the yarn passes in said second direction, and a false-twist device through which the yarn travels between said last false-twist edge and said pair of delivery rollers, said false-twist device being spaced from said pair of delivery rollers by a distance allowing formation of fiber spreading oscillations and/or centrifugal forces in a yarn segment between said false-twist device and said clamping point.
Dependencies are inferred from the claim text.