Patent ID: 7240875

Claim:
In combination, a yarn catch insert and a yarn winding tube, the insert for insertion into a circumferentially elongated hole formed through the yarn winding tube inwardly of the end of the tube, the yarn winding tube comprising: a hollow cylindrical tube body having a longitudinal axis extending lengthwise between first and second opposite ends thereof and having a substantially cylindrical outer surface, the elongated hole completely surrounded by the cylindrical surface, and the elongated dimension of the hole having a planar side surface with a portion extending in a circumferential direction around a portion of the circumference of the tube body and substantially perpendicular to the longitudinal axis of the tube body, and the yarn catch insert comprising: an inside surface, an outside surface positioned adjacent the outer cylindrical surface of the tube body when the insert is positioned within the hole, and an extended side surface, a portion of the side surface of the insert positioned opposite the portion of the side surface of the hole when the insert is positioned within the hole, the extended side surface of the insert having a planar first portion and a second portion formed at an angle with respect to the first portion, the opposing portions of the side surfaces of the insert and the hole forming a circumferential start-up groove within the cylindrical outer surface of the tube, at least a portion of the start-up groove being tapered in a direction along the circumference of the tube due to the angular relationship between the first portion and second portion of the side surface of the insert.