| 摘要 |
A box having the form of a carrying case when it is closed, and that of a tray when it is fully open, is disclosed. The box is made of a flat blank consisting of a sheet of cardboard, plastic or any other material and provided with folds and cut-outs. In one embodiment, the blank is made in a single piece and has two partial cut-outs (28) in the opposed longitudinal side walls (26) facing the bottom side wall (14). The blank has first (34) and second (36) inwardly re-entrant portions parallel to the two opposed apical side walls (16, 18). The first re-entrant portion (34) includes a substantially trapezoid open cut-out (38). At least one flap (42, 44) extends from the second re-entrant portion (36) through the second apical side wall (18) via a suitable cut-out (22) therein. The flap (42, 44) has a substantially trapezoid base matching the shape of the open cut-out (38) and projects outwards for engaging said open cut-out (38).
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