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US 2004/0104290 A1Published application
Cross-wind bobbin
AssigneeDeutsch Institute fur Textil-und Faserforschung Stuttgart (DITF)
InventorsHeinrich Planck, Christoph Rietmuller, Helmut Weinsdorfer
Life of this patent
Estimating the term…
Abstract
In a cross-wound bobbin (1), the helical lines along which the yarn (4) is wound have a different inclination in adjacent layers. The winding ratios are selected such that the quantity drawn off is greater if the unwinding point is moving from the unwinding end to the bottom end, compared to the quantity drawn off if the unwinding point is moving from the bottom end to the unwinding end.
Claims18
A cross-wound bobbin (1),
- having a bobbin core and
- having a cheese cone (2) which is made up of yarn (4) that is applied in layers to the bobbin core (3) and which has an unwinding end (8), from which the yarn can be drawn off overend, and a bottom end 16,
- wherein the yarn (4) in the cheese cone (2) extends along a helical line from the unwinding end (8) to the bottom end (16) and in another helical line in the opposite winding direction from the bottom end 16) to the unwinding end (8), and the inclinations of the helical lines differ from one another such that, at least in one region of the cheese cone (2), the yarn length being unwound in this region is greater if the unwinding point (12, 12′) of the yarn (4) on the outside of the cheese cone (2) has moved from the unwinding end to the bottom end (16), relative to the yarn length that is drawn off in this region if the unwinding point (12, 12′) has moved from the bottom end (16) to the unwinding end (8).
Dependencies are inferred from the claim text.