PURPOSE: To completely get rid of the false action of an automatic doffing device due to the absence of bobbin thread on the side of a thread feed bobbin, by winding the thread end of a wound up package around an empty paper tube, and conducting the joining of the threads of this paper tube and the thread of the paper feed bobbin, and conducting.

CONSTITUTION: A thread end is sought out of a wound up package 7 which has emitted a fully wound up signal, and after conducting a punch winding 17 or the needed winding around 18 of a thread against an empty paper tube 15, cutting is done again. Next, the thread joining of the threads of this empty paper tube 15 and a thread feed bobbin 7 conducting a winding back, is done. As a result, regardless of the remaining quantity of the thread of the thread feed bobbin 7, the doffing action of an automatic doffing device can be conducted smoothly without a false action due to.