| 摘要 |
<p>The sheet (10) of paper or any other similar material is prepared in such a way that it features a first series of zigzag folds (12) and a second one (14) which is at a right angle to the first one and made after the sheet (10) was folded along the first series of zigzag folds, while the sheet can be unfolded without the folds (12, 14) to disappear and can be refolded. The sheet features two segments (20, 22) which are in diagonally opposite corners (24, 26) of the sheet (10) or near them and are determined by the folds (12, 14) and/or edges (28, 39). The sheet features means (181, 19, 21) for forming a stiff or semi-stiff section (16, 18) for at least one of the specified segments (20, 22) while the specified means (181, 19, 21) include at least two panels (181, 19, 21), which are hinged for mutual folding to create the specified section (16, 18), adapted to serve as a handle for folding and/or unfolding the sheet (10). The sheet (10) can be held and unfolded by a single move and if possible by using one hand only.</p> |
