W. Schlafhorst Ag & Company

W. Schlafhorst & Co.

Siegfried Bruns

Heinz Kamp

Peter Gerhards

Karl-Josef Brockmanns

Theo Lembeck

In the course of rewinding yarn on a bobbin winding machine, the yarn performs a balloon-like oscillation around the delivery bobbin. The shape of the balloon has an effect on the yarn tension force and thus on the behavior of the yarn during winding. To reduce resulting tension fluctuations and particularly tension peaks, the course of yarn travel is influenced by means of a device in accordance with the present invention having an annular yarn guide surface comprised of a first set of guide surfaces collectively forming a part of a truncated cone the larger diameter of which is adjacent the delivery bobbin and a second set of guide surfaces collectively forming converging edges of an at least five-sided truncated pyramid with each pyramidal edge being disposed to extend axially between two adjacent first guide surfaces forming recessed notches in their collective conical surface. The conicity of the truncated cone and of the truncated pyramid extending in the same direction with coinciding axes to arrange the first and second guide surfaces symmetrically with respect to one another.

Device for controlling yarn ballooning at the winding head of a bobbin

Control means are provided for an apparatus for cross-winding packages of textile yarn or the like. The control means includes means operable during at least a portion of the rotation of the package at the selected rotational speed for increasing the relative frequency of traverse of the yarn guide means with respect to the selected rotational speed to a ratio less than the ratio of the rotational speed to the relative frequency of traverse prior to rotation at the selected rotational speed. The control means can gradually increase the relative frequency during operation at the selected rotational speed so that the ratio of the rotational speed to the relative frequency of traverse of the yarn guide means gradually decreases from the ratio of the rotational speed to the relative frequency of traverse at the beginning of rotation at the selected rotational speed.

Control means for apparatus for cross-winding packages

A sliver dividing device in a textile machine for a sliver travelling in a given direction comprises a sliver divider for dividing the sliver into at least two strands to be delivered to a work station for further processing. The sliver divider is movable in a direction substantially perpendicular to the given direction. In a preferred embodiment, the device includes guide walls for guiding the sliver with the sliver divider being disposed between the guide walls. In another preferred embodiment, the sliver divider is further rotateable about a pivot shaft and the guide walls are moveable and/or rotatable.

Sliver divider having a positionable blade and guide walls

Control means in an apparatus for cross-winding packages of textile yarn or the like is provided and includes means operable during at least a portion of the high speed or accelerating rotation for increasing the relative frequency of traverse of the traversing yarn guide means with respect to the rotational winding speed of the package from a frequency at which the ratio of the rotational winding speed to the relative frequency of traverse is greater than the ratio of the selected rotational winding speed and the related selected frequency of traverse. The control means can gradually increase the relative frequency during the high speed or accelerating rotation so that at least before the end of the high speed or accelerating rotation, the ratio of the rotational winding speed to the relative frequency of traverse of the yarn guide means is approximately the same as the ratio of the selected rotational winding speed and the related selected frequency.

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Monchengladbach, Germany

Siegfried Bruns