Abstract: Apparatus for automatically forming a yarn reserve on a wind-up bobbin of a yarn treatment machine, is described in which a slot disc at one end of the bobbin pinches and tears off the yarn prior to causing the yarn to engage a first stationary catching thread guide through which the yarn passes while being wound to form the yarn reserve. However, as the usual reciprocating thread-guide approaches the end of the bobbin, a movable thread-guide element fixed thereto transfers the yarn to a second stationary catching thread-guide. Then, on reversal, the movable-thread-guide element releases the yarn, the second catching thread-guide being positioned so that the yarn then enters the reciprocating thread guide to enable the yarn to be wound up to fill the bobbin in the wind-up range thereof.

Abstract: A textile machine having a line of bobbins to which filaments are fed continuously is provided with bobbin-exchanging device arranged to run along a rail in front of the bobbins. On reaching a bobbin holder on which a full bobbin is to be exchanged for an empty one, the device is stopped and a first arm is swivelled upwards for a holding device thereon to engage the full bobbin. Simultaneously a second arm carrying a power driven friction roller for maintaining the rotation of the full bobbin is swivelled into engagement with the full bobbin, and a third arm having an outwardly extended pivoted terminal portion carrying a device holding an empty bobbin, is swivelled upwards. The first arm is then withdrawn carrying the full bobbin past the empty bobbin while the full bobbin is being driven by the friction roller. The terminal portion of the third arm is pivoted inwards and the third arm raised further to place the empty bobbin in the bobbin holder.