Abstract: The machine according to the invention comprises: a lower frame fitted with a linear guide system (21), a mobile carriage (23) comprising a front half-carriage (24) and a back half-carriage (25), each half-carriage including: a rigid bridge installed free to slide on the linear guide systems (21), a motorised device (37) for driving at least one belt in rotation, at least a first return device (41) for at least one belt, at least one endless driving belt (38) installed between the motorised drive device (37) and the return device (41) and delimiting a receptacle gripping and movement path, and a system (61) for moving one half-carriage away from or towards the other half-carriage.