Tray sealing machines that cut a cover film in a sealing station before the cover film is applied to the tray to be sealed are known from the state of the art. A blade is typically arranged on a sealing frame in such a way that it juts out in the direction of movement so far that the cover film is cut before the cut cover film is clamped onto the tray by a sealing frame and the sealing subsequently takes place.
The disadvantage of this technique is that the position of the cut cover film on the tray is not process-reliable.
Other tray sealing machines, in which the cover film is cut after being clamped on and after or during the sealing process, have a device that allows the blade to be moved independently of the sealing frame and the cover film in such a way that the cover film is cut outside the tray.
The disadvantage of this execution is that the cut film is cut outside the tray edge and the area between the sealing seam and the outer edge of the cover film is not fixed in place or is loose.