A transfer device raises batteries of flat boxes inside a carton so that one battery at a time is in a waiting position beyond an open upper face of the carton at an inlet line of a boxing machine. A frame is predisposed to translate above the positioning station and the inlet line between a first position above the waiting position and a second position above the inlet line. Grippers on the frame both grip and retain a box battery at two ends thereof and release the battery. The grippers are activated, with the frame in the first position, to grip and retain the battery of boxes at its two ends and, with the frame in the second position, to release the battery into the inlet line.

A transfer device raises batteries of flat boxes inside a carton so that one battery at a time is in a waiting position beyond an open upper face of the carton at an inlet line of a boxing machine. A frame is predisposed to translate above the positioning station and the inlet line between a first position above the waiting position and a second position above the inlet line. Grippers on the frame both grip and retain a box battery at two ends thereof and release the battery. The grippers are activated, with the frame in the first position, to grip and retain the battery of boxes at its two ends and, with the frame in the second position, to release the battery into the inlet line.