| 摘要 |
<p>A rectangular jacket is prepared from flexible sheet material. It has a first fold line (2) dividing it into upper and lower halves (O, U) and a central pair of fold lines (3, 4) at right angles to it (2). They divide the jacket into left and right halves, with a spine (5). Further fold lines (6, 7) are made in the left and right halves, parallel to the spine folds. These define the outer and inner sections (a, i) of the halves. The outer sections (a) are folded-in completely about the further fold lines, to rest against the inner sections and at least partially cover them. The upper half (O) is folded onto the lower half (U) along the fold line (2), so that it is covered and both halves lie together. An independent claim IS INCLUDED FOR a paperback with jacket.</p> |
