| 摘要 |
Wrapping apparatus for winding a wrapping foil web (F) around an object (1) to be packaged, said wrapping apparatus comprising a foil dispenser (2) arranged to circulate along a ring-like endless track (3) around the object to be packaged, which foil dispenser (2) comprises a frame (4), a detachable and replaceable foil roll (5) mounted on the frame, supporting elements (6) for supporting the foil roll on the frame, and tensioning means (7) for braking foil delivery from the roll and maintaining a predetermined foil tension. The tensioning means (7) comprise a sensor (8) for detecting foil web tension, and an electric motor (9) for driving the foil roll (5), the torque, speed of rotation and/or direction of rotation of said electric motor being controlled on the basis of foil tension as detected by the sensor.
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