| 摘要 |
The invention relates to a method and a device for forming a top film sheet from a film web wound on a roll and for setting it onto an object to be packaged. In the method, the end of the film web is gripped over the entire width of the film web to pull it over the object to be packaged. In addition, the film web is gripped before and after the pulling action at a point located at a distance from the cutting line such that, after the cutting has been performed, there remains hanging freely downwards a length of film web that can be gripped for the aforesaid pulling action. In the pulling device (14) performing the pulling of the film web (3), the motion of the pulling jaws (15, 16) between a closed position and an opened position is substantially horizontal. The pulling jaws (15, 16) have been arranged to grip the end of the film web over the entire width of the web. The gripping line of the holding jaws (10, 11) of the holding device (9) is at a distance from the cutting line of the cutting device (13) such that near the free end of the film web there remains hanging freely downwards a length (18) of film web that the pulling jaws (15, 16) can grip to pull the web. |
