Method to wind down a yarn package and device to perform the method
AssigneeCerit S.p.A.
InventorsMirko Marchiori, Danny Lant, Fabio Lancerotto, Umberto Gerin
Life of this patent
Estimating the term…
Abstract
The invention concerns a spinning machine having a spindle with which to rotate a yarn package, a winding apparatus to wind the yarn on the package, and drafting rolls to feed the yarn to the winding apparatus. According to the disclosed method, the winding down of the yarn on the package is achieved by reversing the rotation of the spindle relative to the spinning direction. according to the disclosed device, a spacer ring is employed which is fixed to the spindle, and which has an upper and a lower hollow, a protruding edge, and substantially sharp edges which aid in cutting the yarn.
Claims15
A method to wind down a yarn package, on a spinning machine having a spindle to rotate the yarn package in a spinning direction, means to wind yarn on the yarn package and drafting rolls to feed the yarn, comprising:
- forming underwinding coils by rotating the yarn package on the spindle in a direction opposite to the spinning direction.
A method to wind down a yarn package, on a spinning machine having a spindle to rotate the yarn package in a spinning direction, an underwinding sleeve located on said spindle, means to wind yarn on the yarn package, and drafting rolls to feed the yarn, comprising:
- diverting the yarn from a position corresponding with an upper end portion of the yarn package to a position corresponding with the underwinding sleeve;
- and then
- forming the underwinding coils by rotating the yarn package on the spindle in a direction opposite to the spinning direction.
An apparatus for winding down a yarn package comprising:
- a spindle to rotate the yarn package;
- and
- means to wind yarn on the yarn package;
- and
- drafting rolls to feed the yarn to the winding means;
- and
- an underwinding sleeve located on said spindle and rotatable relative to the spindle;
- and
- a spacer ring, solidly fixed to the spindle above the
- underwinding sleeve, comprising:
- an upper annular hollow end to accommodate the yarn package;
- a lower annular hollow end having a substantially sharp annular edge;
- and
- an annular protruding surface positioned between the upper and lower ends of said spacer ring.
Dependencies are inferred from the claim text.