Wrapping machine

1. A wrapping machine for wrapping a product with a plastic film comprising, a supporting frame with which a ring arrangement is associated that rotates around a wrapping axis of said film around said product and supports a carriage arranged for supporting a reel of said film and for supporting a first roller and a second roller cooperating for unwinding and stretching said film, a first motor fixed to said supporting frame and coupled with said first roller, a second motor fixed to said supporting frame and coupled with said second roller, a driving arrangement for coupling said first motor and said second motor with said first roller and with said second roller, respectively, said driving arrangement comprising a flexible driving arrangement, wherein said flexible driving arrangement comprises a first driving belt and a second driving belt rotated by said first motor and by said second motor, respectively, and acting respectively on a first driven belt and on a second driven belt arranged for rotating said first roller and said second roller, respectively, said wrapping machine further comprising a first pulley arrangement and a second pulley arrangement on which are wound, at least partially, said first driving belt and said second driving belt, respectively.

2. A wrapping machine according to claim 1 , wherein said first driven belt and said second driven belt are wound on said first driving belt and on said second driving belt, respectively.

3. A wrapping machine according to claim 1 , wherein said first pulley arrangement and said second pulley arrangement are rotatably supported by a first supporting arrangement associated with said supporting frame.

4. A wrapping machine according to claim 3 , wherein said first supporting arrangement comprises a plurality of supporting elements connected with said supporting frame in an angularly spaced arrangement.

5. A wrapping machine according to claim 4 , wherein each of said supporting elements supports a first pulley of said first pulley arrangement and a second pulley of said second pulley arrangement.

6. A wrapping machine for wrapping a product with a plastic film comprising, a supporting frame with which a ring arrangement is associated that rotates a wrapping axis of said film around said product and supports a carriage arranged for supporting a reel of said film and for supporting a first roller and a second roller cooperating for unwinding and stretching said film, a first motor fixed to said supporting frame and coupled with said first roller, a second motor fixed to said supporting frame and coupled with said second roller, a driving arrangement for coupling said first motor and said second motor with said first roller and with said second roller, respectively, said driving arrangement comprising a flexible driving arrangement, wherein said flexible driving arrangement comprises a first driving belt and a second driving belt rotated by said first motor and by said second motor, respectively, and acting respectively on a first driven belt and on a second driven belt arranged for rotating said first roller and said second roller, respectively, said wrapping machine further comprising a motion transferring arrangement supporting and connecting said first driving belt and said first driven belt, and said second driving belt and said second driven belt, said motion transferring arrangement being arranged for transferring motion from said first driving belt to said first driven belt and from said second driving belt to said second driven belt, wherein said motion transferring arrangement comprises a transferring belt arrangement that is rotatable around said wrapping axis.

7. A wrapping machine according to claim 6 , wherein said transferring belt arrangement comprises a first transferring belt and a second transferring belt, said first transferring belt being arranged for supporting said first driving belt and said first driven belt, said second transferring belt being arranged for supporting said second driving belt and said second driven belt.

8. A wrapping machine according to claim 7 , and further comprising a third pulley arrangement and a fourth pulley arrangement on which said first transferring belt and said second transferring belt, respectively, are partially wound.

9. A wrapping machine according to claim 8 , wherein said third pulley arrangement and said fourth pulley arrangement are rotatably supported by a third supporting arrangement and by a fourth supporting arrangement associated with said supporting frame.

10. A wrapping machine according to claim 9 , wherein said third supporting arrangement and said fourth supporting arrangement are connected with said supporting frame in an angularly spaced arrangement.

11. A wrapping machine according to claim 9 , wherein the distance of said third supporting arrangement from said wrapping axis is less than the respective distance of said fourth supporting arrangement from said wrapping axis.

12. A wrapping machine according to claim 9 , wherein said third supporting arrangement and said fourth supporting arrangement are external to said ring arrangement.

13. A wrapping machine according to claim 6 , and further comprising a motion transmitting arrangement arranged for transmitting motion from said first driven belt to said first roller and from said second driven belt to said second roller, said motion transmitting arrangement being associated with said carriage.

14. A wrapping machine for wrapping a product with a plastic film comprising, a supporting frame with which a ring arrangement is associated that rotates around a wrapping axis of said film around said product and supports a carriage arranged for supporting a reel of said film and for supporting a first roller and a second roller cooperating for unwinding and stretching said film, a first motor fixed to said supporting frame and coupled with said first roller, a second motor fixed to said supporting frame and coupled with said second roller, a driving arrangement for coupling said first motor and said second motor with said first roller and with said second roller, respectively, said driving arrangement comprising a flexible driving arrangement, wherein said flexible driving arrangement comprises a first driving belt and a second driving belt rotated by said first motor and by said second motor, respectively, and acting respectively on a first driven belt and on a second driven belt arranged for rotating said first roller and said second roller, respectively, said wrapping machine further comprising a motion transferring arrangement supporting and connecting said first driving belt and said first driven belt, and said second driving belt and said second driven belt, said motion transferring arrangement being arranged for transferring motion from said first driving belt to said first driven belt and from said second driving belt to said second driven belt, wherein said motion transferring arrangement comprises a fifth pulley arrangement and a sixth pulley arrangement, said sixth pulley arrangement being rotatably associated with said fifth pulley arrangement.

15. A wrapping machine according to claim 14 , wherein said fifth pulley arrangement is arranged for supporting said first driving belt and said first driven belt.

16. A wrapping machine according to claim 15 , wherein said fifth pulley arrangement is rotatably supported by a fifth supporting arrangement associated with said supporting frame.

17. A wrapping machine according to claim 16 , wherein said fifth supporting arrangement is connected with said supporting frame in angularly spaced arrangement.

18. A wrapping machine according to claim 16 , wherein said fifth supporting arrangement is external to said ring arrangement.

19. A wrapping machine according to claim 14 , wherein said sixth pulley arrangement is arranged for supporting said second driving belt and said second driven belt.

20. A wrapping machine according to claim 14 , wherein between said sixth pulley arrangement and said second driving belt and said second driven belt, respectively, a third transferring belt is interposed that is arranged for rotatably supporting said second driving belt and said second driven belt and for transferring motion from said second driving belt to said second driven belt.

21. A wrapping machine according to claim 14 , and further comprising a motion transmitting arrangement arranged for transmitting motion from said first driven belt to said first roller and from said second driven belt to said second roller, said motion transmitting arrangement being associated with said carriage.