Yarn carrier

The present invention relates to a yarn carrier for winding yarn thereon. In particular, the yarn carrier includes a yarn catch insert positioned within a recess formed within a hollow cylindrical tube.

Yarn carriers, sometimes known as textile yarn cores, yarn winding tubes or yarn bobbins, are used in the textile industry to wind and support an elongated yarn. In order to make a yarn package, a moving yarn line is strung up onto a rapidly rotating empty core. The moving yarn is contacted with the rotating core and a catching, start-up or pick-up groove is provided on the core to grip the yarn and start the winding operating. The catching groove is normally located adjacent one end of the tube.

U.S. Pat. No. 5,927,637 to Gerharts shows a yarn carrier having a tubular wall, which includes a yarn catching slot therein. The slot allows the bobbin to catch advancing yarn along a yarn catching tongue. The yarn catching tongue engages the yarn and slides the yarn into a clamping slot, which holds the yarn for winding.

US 2005/0077421 to Hernandez et al., shows in various embodiments a yarn carrier incorporating a yarn catch insert. The yarn carrier includes a hollow tube, having a hole in its surface to receive a yarn catch insert. When positioned within the hole, the insert receives and catches the yarn in a groove formed by the insert. Once the yarn is caught in the groove, the yarn is wound around the yarn carrier. The yarn catch insert can be separated from the tube. The yarn catch insert can then be cleaned and reinserted or replaced to reuse the tube for winding.

This present invention is a yarn carrier for winding yarn thereon. The yarn carrier includes a hollow cylindrical tube having opposing ends. Adjacent one end of the tube is provided a recess formed circumferentially along a portion of the tube wall. The recess may be located proximal the end of the tube or may be spaced inwardly from the tube end. The recess extends radially through the tube wall.

The yarn carrier further includes a yarn catch insert positioned within the recess on the tube. The yarn catch insert includes a yarn catching slot that extends in a circumferential direction of the tube. The slot includes a major opening located at one end of the insert, a minor opening positioned adjacent the major opening and a first step positioned between the major and minor openings. In one aspect of the invention, the yarn catching slot may include a side flank, opposite the first step, which extends the length of the yarn catching slot. In a further embodiment, the yarn catching slot may include a second step, opposite the first step. In a further embodiment, the yarn catch insert may comprise first and second members that are coupled together to form the yarn catching slot.

A catching groove is provided having a width that is smaller than the diameter of the yarn to be wound on the tube. The catching groove is positioned adjacent the minor opening of the insert. The groove generally extends in a circumferential direction, opposite the major opening. The catching groove may be formed as part of the insert or within the tube wall.

Upon rotation of the yarn carrier, the yarn is positioned substantially tangent to the tube wall and in a generally circumferential direction along the yarn catching slot. The yarn drops into the major opening and slides along the first step into the minor opening. After entering the minor opening, the yarn is engaged by the catching groove, which holds the yarn end and winding is initiated.

BRIEF DESCRIPTION OF THE DRAWINGS

For the purpose of illustrating the invention, the drawings show forms of the invention that are presently preferred. However, it should be understood that the invention is not limited to the precise arguments and instrumentalities shown in the drawings.

FIG. 1 is a partial exploded perspective view of a yarn carrier having a yarn winding tube and yarn catch insert.

FIG. 2 is a partial side elevation of the yarn carrier of FIG. 1 with the insert positioned within a recess in the tube.

FIG. 3 is a partial side elevation of another embodiment of a yarn catch insert within a yarn winding tube.

FIG. 4 is a partial side elevation of a further embodiment of a yarn catch insert within a yarn winding tube.

FIG. 5 is perspective view of another embodiment of a yarn catch insert.

FIG. 6 is a partial perspective view of a yarn carrier showing the yarn catch insert of FIG. 5 positioned within a recess in a yarn winding tube.

FIG. 7 is a perspective view of a further embodiment of a yarn catch insert.

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Winding, tensioning, or guiding

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