by arrow 54 more particularly threading arm assembly 50 includes a mounting 56 which is pivotally coupled with a pivot linkage 58 at pivot pin 60 pivot arm 62 has a pre selected length and is in threaded engagement with pivot linkage 58 pivot linkage 58 has a generally l shaped configuration with the free end being coupled with a pneumatic cylinder 64 pneumatic cylinder 64 is a two way cylinder in the embodiment shown which is either manually or remotely actuatable pneumatic cylinder 64 is of course fluidly coupled with a source of pressurized air not shown fig5 illustrates yet another embodiment of a threading arm assembly 70 of the present invention similar to the embodiment of threading arm assembly 50 shown in fig3 and 4 threading arm assembly 70 shown in fig5 has a pivot arm 72 which is pneumatically actuated however rather than pivoting in an upward direction as shown in the embodiment of threading arm assembly 50 pivot arm 72 pivots in a downward direction to move the fiber web tail in a transverse direction with respect to the running direction into ropes 74 pivot arm 72 may also pivot in an upward direction depending on the specific application more particularly threading arm assembly 70 includes a frame 76.