| 摘要 |
The jointing device includes a jointing piece, pref. a ball (3a) or prism, for reception in a circular widening (5a) on each end of a slot (4) formed in each sheet (1,2). The slot extends to half the width of the sheets. Alternatively, one or both widenings can be formed by a hole formed in the solid part of the sheet. Pref. the material of the sheets is plastically or permanently deformable. Also, there are pref. a series of widenings at each slot and/or a series of holes in the solid part of the sheets. |
