| 摘要 |
A flexible platen (150) of parallel bamboo canes has its canes (3) of full width alternating with axially aligned but spaced pairs of short canes (2). Flexible, non-resilient wires extend through aligned holes in all of the canes (2 and 3) to hold the platen together and the wires are tensioned by devices located in the interiors of selected canes. The platen (150) is bent to conform to a desired shape which is maintained by vertically spaced formers (151 and 156) over which opposite end-portions of the platen (150) are draped. Relative movement between the platen (150) and the formers (151 and 156) is prevented by ropes (146) which suspend the formers from a stand (140) and pass through trapping holes in the formers (151 and 156) and between the longer canes (3) adjacent the marginal edge portions of the platen.
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