| 摘要 |
<p>A load on a pallet covered with an inverted bag with heat shrinkable film is moved through a shrink tunnel. Air is withdrawn from the bag by a venting system that follows the movements of the bag in the tunnel. The air is withdrawn from the bag with sufficient negative pressures to cause the lateral skirts of the bag, which depend below the pallet, to fold against the pallet bottom for heat shrinkage in that position so as to anchor the bag to the pallet.</p> |
