a system for transferring tubular blanks to a packing machine includes an apparatus intermittently positioned in a zone situated in front of the line with an open tubular blank hooked to a retainer . the apparatus includes a rotating member , activated in phase with the line movement , arranged between longitudinal walls , and having a series of transfer devices , angularly equidistanced along a circumference tangential to an upper line branch . the transfer devices have dynamic seating for encountering in zone , a tubular blank flap . the tubular blank is freely inserted in the dynamic seating , and subsequently by hooking the seating , the transfer means are deactivated in proximity to the upper branch in phase with the arranging of segments from radial to vertical first delimiting the dynamic seating and a compartment corresponding to the dynamic seating .