surface 10 of relative product 3 and an end portion 53 of end portion 51 opposite end portion 49 and generally slightly narrower than major lateral walls 7 and 8 projects rearwards of relative inlet 25 is substantially coplanar with minor lateral surface 10 of relative product 3 and contacts the outer surface of relative roller 45 the distance of which from the rear end of relative inlet 25 is less than the width of end portion 53 sheet 6 of packing material remains in this position up to unloading station 22 where upon operation of pusher 31 end portion 53 is brought into contact with and folded backwards by end edge 30 of plate 27 and as relative product 3 is inserted inside unloading guide 26 is positioned contacting major lateral surface 7 of relative product 3 and overlapping end portion 49 to complete relative tubular wrapping 2 along the final portion of packing path p 1 the pocket 15 considered is fed through braking station 35 where pad 41 frictionally engages portion 52 of sheet 6 of packing material so as to exert braking action on the whole of end portion 51 which is thus maintained contacting minor lateral surface 10 of relative product 3 by tension acting in a direction 54 fig2 c opposite direction 14 as the pocket 15 considered is arrested at unloading station 22 relative roller 45 is arrested facing opening 36 the distance of which from the upstream end of unloading passage 29 equals the distance between roller 45 and the upstream end of inlet 25 of relative seat 20 consequently as the pocket 15 considered is arrested facing unloading passage 29 the tension applied by pad 41 to end portion 51 as a consequence of the rotation of packing wheel 11.