Patent ID: 7520110

Claim:
Self-propelled machine for wrapping stacked loads with a protective film which unwinds from a reel, comprising an elevator system ( 2 ) for vertical movement of reel ( 11 ), and a mobile supporting carriage ( 4 ) characterized in that it comprises: two driving wheels ( 40 , 41 ) arranged on the same axis, each driven by its own independent motor ( 42 , 43 ); and an automatic guidance system ( 5 ) with a contact device ( 50 ) adapted to follow a contact surface ( 32 ) of the stacked load ( 31 ) and to detect its distance from the machine, and a servocontrol ( 51 ) which is responsive to the distance detected by said contact device ( 50 ), adapted to control said driving motors of the machine in such a way that the machine follows the shape of the contact surface ( 32 ), wherein said two driving wheels ( 40 , 41 ) are located in the front pad of the mobile supporting carriage ( 4 ), ahead of a swiveling wheel ( 44 ), said swiveling wheel ( 44 ) being adapted to support the machine and to stabilize its motion.