Bags, (1) produced at generic machines (2), are removed by means (3) toward grippers (5) associated to a conveyor line consisting of endless chain sections (4)-(10), including means (8) for weighing the bags (1), and bar-code and bag dimension verifying means (48) and (28). The sections (4) and (10) are related by transfer means (9) which may or may not connect the same, depending on an order received from means (8), (48) and (28), rejecting in the latter event faulty bags or grippers without a bag, or directing them toward a fitting station (12) at which the grippers and bags are released from the chain (10), suspended at different heights and grouped in the projection of a box (16) that is lifted toward the group by a lift (17).
