| 摘要 |
A packaging device is provided with a feed unit for a highly stretchable polyethylene-based plastic film which during use is able to generate and maintain a high number of electric charges on its surface. A vertically movable head having on its lower end a gripping surface with a very smooth, mirror-like gripping surface, is then lowered to have its gripping surface engaged with the leading end of the film which overlies and is supported on a planar supporting surface. The smooth gripping surface of the head adheres cohesively by electrostatic molecular attraction to the film, which is then moved by the head over the upper end of a package containing food, or the like, which is to be covered by the film. The head then descends severing the film from the supply thereof and securing the edge of the film to the edge of the container.
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