Shock in the Yarn during Unwinding from Packages

Figure 4

(a) The surface of the cylinder is cut along the long edge and the surface is flattened. (b) The flattened surface is a plane with axes 𝑧 and 𝜒. The angle 𝜙 is the angle of the yarn in the (𝑧𝜒) plane.

(a)

(b)