| 摘要 |
When manufacturing protecting covers of shrinkable plastic foil having a pleated portion along at least one of its sides, welding seams (14b, 14c) are arranged individually in the pleats (16, 17) so no welding seam will interconnect more than two layers of foil. The covers are manufactured in a long series, separated by tear-off lines (15) and are rolled or folded into a magazine. When feeding-out covers from the latter an expandable folding-out device (18) runs within the pleated portion, which may occur continuously from cover to cover due to the individual welding seams (14b, 14c) at the pleats. The devices (18) may be brought to grip the foil and also to expand the pleats so the cover will be opened. Further devices (19) are arranged to grip the lower portion of the cover to open the latter fully and to pull the cover down along a cargo unit (20). |
