| 摘要 |
The invention consists in an approved apparatus for storing sheets, for instance of paper or foil, including especially maps and drawings. The sheets are neither rolled nor folded. They are readily inspected, and a considerable number of sheets can be stored without interfering with each other. The sheets are held from above from any convenient rail, by being inserted, singly or multiply in a clamp that may be comparable in length with the sheet. it is disclosed that the pressure of the clamp may be reduced gradually by means of wing nuts (4) on self locking bolts (5), biased by leaf springs (10). |
