| 摘要 |
A display sign of the type which utilizes a flexible sheet as a graphics carrier has a polygonal frame (2) to withstand the forces necessary to tension the sheet, latch assemblies (44, 46) on the frame which grip the edge of the graphics screen (18). A fluid chargeable ring (26) situated at the perimeter of the flexible sheet between the latter and the support which upon charging tensions the sheet without wrinkling it. Instead of latches the flexible sheet may have a peripheral hem (20) with a drawstring (22). Instead of latches a captive roller screen tensioner 76 is disclosed. |
