Yarn cylinder

The yarn cylinder includes a hollow cylindrical body; a groove, almost annularly disposed around the cylindrical body, being formed with four sections of teeth to define four segments; and a plurality of recesses, located beside the groove one by one, each recess having a tapered end, and all tapered ends being toward the same direction.

BACKGROUND OF THE INVENTION

1. Technical Field

The invention relates to filatures.

2. Related Art

Please refer toFIGS. 1-4, which show a typical yarn cylinder. The yarn cylinder is made of plastic and is formed with a groove1. The groove1is of a C-shape with about 350 degrees. Two ends of the groove1are separately formed with two guiding slants11. The groove1is formed with four sections of teeth30,40,50,60to define four segments3,4,5,6. Directions of two adjacent sections of teeth30,40,50,60are different from each other.

A division line300,400,500,600is defined between every two adjacent sections of teeth30,40,50,60. Directions of two adjacent sections of teeth30,40,50,60meet at an angle. However, the groove1with the guiding slants11is too narrow, so yarn is not easy to enter the groove1. And the guiding slants11do not have enough holding ability.

SUMMARY OF THE INVENTION

An object of the invention is to provide an improved yarn cylinder, which allows yarn to easily enter the groove and can firmly hold yarn.

To accomplish the above object, the yarn cylinder of the invention includes a hollow cylindrical body; a groove, almost annularly disposed around the cylindrical body, being formed with four sections of teeth to define four segments; and a plurality of recesses, located beside the groove one by one, each recess having a tapered end, and all tapered ends being toward the same direction.

DETAILED DESCRIPTION OF THE INVENTION

Please refer toFIGS. 5-8. As shown, the improved yarn cylinder of the invention includes a hollow cylindrical body. A groove1is almost annularly disposed around the cylindrical body. The groove1is of a C-shape and formed with four sections of teeth30,40,50,60to define four segments3,4,5,6. A plurality of recesses31are formed beside the groove1one by one. Each recess31has a tapered end and a guiding slant11, and all tapered ends are toward the same direction. This arrangement allows yarn (a) to easily enter the groove1and can firmly hold the yarn (a).

Please refer toFIG. 7. The yarn (a) can be easily wound in the groove1through the guiding slants11of recesses31. The yarn (a) cannot escape from the groove1because the four sections of teeth30,40,50,60in the four segments3,4,5,6and the recesses31compose an interlaced holder. By the arrangement of the invention, the yarn (a) can be easily guided into the groove1but the yarn (a) is hard to escape from the groove1.