| 摘要 |
A pair of elongate holding devices 7a,7c extending along opposite sides of an imaginary rectangle have respective longitudinal recesses 12,21 which hold respective edge portions 6a,6c of a poster 6. One holding device 7c has a fixed bearing member 16 and a movable member 18 which contains the recess 21 and which is pivotable about a pivot axis 19 from (a) an active position, in which the recess 21 is open in a direction away from the opposite holding device so that the poster 6 turns back on itself near the edge portion 6c, the poster being under tension between the pair of holding devices, to (b) a passive position, in which tension in the poster is released sufficiently to allow the edge portion 6c to be removed from the recess 21. The holding device 7a is preferably an upper holding device with an undercut slot 12 slidably receiving a bead 14 at the upper edge portion 6a of the poster.
|
