Abstract: The invention concerns an apparatus including a body equipped with means supplying a continuous wire, feeding said wire to a curved slot capable of being closed on itself, a twister driven in rotation during the process and a wire cutting device to form a tie. Said apparatus further comprises a first motor for driving the wire and for closing and opening the guide slot and a second motor for actuating the twister and the wire cutting device. Control means successively drive the wire and close the slot with the first motor, then, the first motor being switched off, simultaneously drive the wire cutting device and the twister with the second motor, and finally, after the second motor is switched off, open the slot and feed the latter with wire.