| 摘要 |
<p>A sheet (10) of material as hereinbefore defined has a first set of concertina folds (12) and, so as to be transverse to these when the sheet is folded with these folds, a second set of concertina folds (14), the sheet (10) being provided with two diagonally opposite holding portions (16, 18) at segments (20, 22) thereof, which segments are at or near diagonally opposite corners (24, 26) of the sheet (10) and defined by fold(s) (12, 14) and/or edge(s) (28, 30) thereof, one (12) of the holding portions being stiff and the opposite holding portion (14) having a part (32) extending beyond the remainder of the sheet (10) when folded, so as to be suitable to be held in a binder (34). Said part (32) may be pre-bound in a book or may have punch-holes (38), suitable for a ring-binder. The material, apart from the stiff portion (16), may be of paper-like plastics material that is tear-resistant.</p> |
