Device and method for top seal packaging

摘要

A wrapping device for welding a stretch film to a tray. A wrapping device (1) covers a top opening of a tray (T) with a stretch film (Fm), welds the stretch film (Fm) to the tray (T), and thermally cuts it. The wrapping device (1) includes a stretch mechanism (9), a control portion and a film winding portion (53). The stretch mechanism (9) stretches the film (Fm). The control portion controls the stretch mechanism (9) to stretch the film (Fm) at least before welding the stretch film (Fm) to the tray (T). The film winding portion (53) winds up the stretch film (Fm) after the thermal cutting.