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AssigneeW. Schlafhorst AG & Co.
InventorsWilhelm Kuepper, Heinz-Lorenz Topuett, Helmuth Hensen, Uwe Fabelje
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A method and apparatus for producing an end winding on a bobbin on which yarn has been wound. The bobbin is wound in an unwinding direction while the trailing yarn end is engaged and a length of yarn is unwound from the bobbin by suction. The yarn is released from the suction once a length of yarn has been unwound from the bobbin, the released unwound yarn falls onto a yarn support member to be supported at a location at substantially the level of the upper end of the bobbin. The bobbin is then further rotated in the unwinding direction to wind the unwound yarn length into an end winding on the upper end of the bobbin. The yarn support member includes a pair of oppositely sloping transverse surfaces spaced lengthwise of the yarn from one another to define a receiving slot therebetween and a yarn guiding eye is disposed beneath and in communication with the receiving slot for supporting the unwound yarn length during winding of the end winding.
A method for forming an end winding on an upper end portion of a bobbin on which yarn has been wound, comprising:
An apparatus for forming an end winding on an upper end portion of a bobbin on which yarn has been wound, comprising:
In a textile machine of the type having a bobbin rotating device for rotating a bobbin with yarn wound thereon, a suction device for engaging a trailing end of the yarn wound on the bobbin and applying a releasable yarn pulling force thereto to effect unwinding of a yarn length during rotation of the bobbin in an unwinding direction and a device for releasing the unwound yarn length from the releasable yarn pulling force when an extent thereof has been unwound from the bobbin, the unwound yarn length providing a suitable length of yarn for winding onto the upper end of the bobbin as an end winding, a yarn support member positionable between the releasing device and the bobbin at a position relative to the unreleased unwound yarn length such that the unwound yarn length falls onto the yarn support member after it is released by the releasing device, said yarn support member being disposed relative to the bobbin for supporting the unwound yarn length at a location at substantially the level of the upper end of the bobbin during further rotation of the bobbin in the unwinding direction, whereby the unwound yarn length is wound on the upper end of the bobbin while being supported by the yarn support member during the rotation of the bobbin in the unwinding direction.
Dependencies are inferred from the claim text.