Abstract: A strapping head for a strapping machine includes a containment frame for housing at least a strap launch/rewind path defined by a launch/tensioning assembly including a plurality of driving wheels of the strap, a welding assembly and a gripping and cutting device the driving wheels of the launch/tensioning assembly being brought into rotation by a first actuation motor, wherein all of the launch/tensioning assembly, welding assembly and gripping and cutting device have driving members driven into movement through a single linear cam apt to move alternately in the longitudinal direction through a second actuation motor and having cam profiles both on an horizontal plane and on a vertical plane, and the linear cam is actuated by the second driving motor being integral in rotation with screwed spindle transmission elements mutually cooperating with screw nut elements integral with the linear cam.

Abstract: A strapping head for a strapping machine includes a containment frame for housing at least a strap launch/rewind path defined by a launch/tensioning assembly including a plurality of driving wheels of the strap, a welding assembly and a gripping and cutting device including locking grippers, a moving abutment plate and a cutter, the driving wheels of the launch/tensioning assembly being brought into rotation by a first actuation motor, wherein all of the launch/tensioning assembly, welding assembly and gripping and cutting device have driving members driven into movement through a single linear cam apt to move alternately in the longitudinal direction through a second actuation motor and having cam profiles both on an horizontal plane and on a vertical plane, and the linear cam is actuated by the second driving motor being integral in rotation with screwed spindle transmission elements mutually cooperating with screw nut elements integral with the linear cam.

Abstract: Device to control the feeding of the strap in a strapping machine, comprising at least one fast driving wheel (4) and one slow driving wheel (2) which are mounted on fixed axes, the strap (R) being guided on the periphery of both driving wheels, and wherein pressure elements (5 and 14) are provided to press the strap (R) against the periphery of one and/or the other of the driving wheels, so as to ensure feeding thereof. The pressure elements are mounted on an oscillating sector (8) which is operated in response to tensioning of the strap.

Abstract: Device to control the feeding of the strap in a strapping machine, of the type wherein the strap (R) is guided on the periphery of at least one driving wheel (1) and at least one pressure wheel (4) is provided to press the strap (R) against the periphery of said driving wheel (1) so as to guarantee its feeding. An arm (8) is provided to oscillate between a guiding position, in which the arm at least partly surrounds the periphery of the driving wheel (1) so as to form a guiding channel (C3) for the strap (R), and an opening position of release, away from the driving wheel (1), into which the arm is moved by said strap when it stops, and in which it controls the removal of the pressure wheel (4) so as to release the feeding pressure. The oscillating arm (8) extends, beyond its part surrounding the periphery of the driving wheel (1), into a counter-bent portion which determines a saddle path (C4) for the strap (R).

Abstract: The invention relates to a device for feeding and tensioning the strap in strap applying machines, of the type in which the strap (R) is moved forward and fed between a pair of wheels, one being a drawing wheel (1) rotated by motor means and the other being an idly rotating contrast wheel (2) pressed against the first wheel through the strap (R). The drawing wheel (1) is caused to rotate by an epicyclic train, the free element (9) of which is connected by a mechanical drive to the shaft (8) of the contrast wheel (2), while the contrast wheel (2) is mounted idle onto an eccentric pin (7) of said shaft (8). The mechanical drive comprises a movable control element (17) being apt to act elastically on the shaft (8) of the contrast wheel (2) in order to cause the rotation thereof.