| 摘要 |
Improvements in a truck van closure of the type having a flexible closure web with an opening therethrough and means for moving the web about the perimeter of the van between an inoperative position wherein access through the opening into the interior of the van is prevented and an operative position wherein access through the opening is allowed, the improvements comprising a means for tensioning the web in a vertical plane when the web is in its inoperative position, means for guiding the web along its path of travel between its operative and inoperative position and means for sealing the web against the entry of foreign materials into the van over the top of the web when the web is in its inoperative position.
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