| 摘要 |
A blank 100 for forming a polygonal prism (fig 2) including a plurality of rectangular side wall panels 102 joined together in a series, an edge of a first of the series of panels 102a being connectable to an edge of a last of the series 102f to form a prism. For each distinct pair of adjacent sidewalls of the prism, there are one or more top panels 106 for connecting together the tops of the sidewall panels and form an externally visible top portion of the prism. The shape of the externally visible top portion is substantially quadrilateral. A free side of one or more top panels includes a top panel extension 112 for tucking under the externally visible top portion for a neighbouring distinct pair of adjacent side walls so as to maintain the top of the prism in a closed state. |
