Spinning machine with a doffing apparatus

A spinning machine of the type wherein a yarn knotting truck having a knotter provided thereon is adapted to travel in a truck travelling space provided along a number of spinning units included in said spinning machine, the travelling of said knotting truck being controlled in a known manner in order to successively effect knotting at said individual spinning units, further comprising:

• a doffing truck;
• a doffing apparatus, carried on said doffing truck, said doffing apparatus being operably adapted for effecting doffing of packages of said spinning units which have a fully wound yarn package thereon;
• and
• means, associated with each spinning unit, for sensing the presence of a fully wound yarn package, for identifying the spinning unit containing said fully wound yarn package, and for communicating a doffing request signal to said doffing truck;
• said truck travelling space being formed internal of each spinning unit such that a knotting operation and a doffing operation may be directly observable;
• said doffing truck being caused to operate, in response to the doffing request signal, so that it travels in said truck travelling space until aligned, by known means, with the spinning unit communicating the doffing request signal whereat said doffing of the package is effected.