| 摘要 |
The method for forming a polygonal container from a blank comprises placing the blank over a polygonal cone having the same number of sides as the side walls of the polygon to be formed. The blank is inverted during placement over the cone so that the upper edges of the container side walls engage the sides of the cone and so that the bottom closure portion of the container is presented upwardly. The bottom closure is folded inwardly along preformed folding lines into a configuration comprising a plurality of triangular bottom panels equal in number to the side panels and a plurality of interconnecting webs each extending between a pair of adjacent bottom panels. Each bottom panel is hingedly connected to one of the side panels and is inclined upwardly from the lower edge of the side panel to which it is connected to form an acute angle therewith. Each bottom panel has two side edges which abut adjacent side edges of adjacent bottom panels, and having side webs on either side thereof hingedly connecting the bottom panel to an adjacent bottom panel. When the container is folded, the webs form a plurality of vertically disposed ribs which protrude downwardly from the bottom closure and which are arranged in a spoke like configuration. These ribs are fastened together at the center of the spoke like configuration with a clip which retentively engages the ribs.
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