Textiles: spinning – twisting – and twining – Apparatus and processes – Piecing up
Reexamination Certificate
2006-11-02
2011-11-22
Hurley, Shaun R (Department: 3765)
Textiles: spinning, twisting, and twining
Apparatus and processes
Piecing up
C057S264000
Reexamination Certificate
active
08061116
ABSTRACT:
A method for piecing a yarn at a rotor spinning machine comprising plural spinning stations, wherein more than five piecers are successively produced in a measuring phase and coordinates of measurement values and associated measurement values from individual measurements of the piecers are evaluated for averaging and determining a fiber band function taking into account a drafting reduced for the measurement values, which reflects the fiber flow behavior in the form of the respective fiber band quantity supplied to the rotor as a function of the transport path of the fiber band feed. The speed of the fiber band feed is controlled in a delayed manner from the run-up of the yarn draw-off, dependent on the rotor speed, by the fiber band function, such that the fiber shortfall quantity being produced from the fiber band function is compensated by dynamic feed addition with respect to height and length.
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Raasch H. et al. “Automatisches Anspinnen Beim OE-Rotorspinnen” Melliand Textilberichte, International Textile Reports, Melliand Textilberichte, Frankfurt Am Main, DE, vol. 70, No. 4, Apr. 1, 1989, pp. 251-256, PX000099924, ISSN: 0341-0781.
Hurley Shaun R
K&L Gates LLP
Oerlikon Textile GmbH & Co KG
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