Patent ID: 7661579

Claim:
A packaging container, comprising: a plurality of plies of material disposed atop one another in a stacked array so as to form a packaging structure having an inner surface portion and an outer surface portion, wherein all of said plies of material have substantially the same lateral width dimension as defined between a pair of oppositely disposed side edge portions thereof; and embossed means formed within said packaging structure at locations defined predetermined distances inwardly from said pair of oppositely disposed side edge portions of said packaging structure, and comprising pleated means having a substantially W-shaped cross-sectional configuration, for facilitating the folding of oppositely disposed side portions of said packaging structure, which are defined between said embossed means and said pair of oppositely disposed side edge portions of said packaging structure so as to define oppositely disposed side leg portions, with respect to a central base portion of said packaging structure at corner regions of a resulting packaging container defined by said oppositely disposed side leg portions and said central base portion, wherein said pleated structures will effectively be expanded and enlarged so as to permit said oppositely disposed side leg portions of said packaging structure to be easily folded upwardly wherein said corner regions will exhibit rounded configurations which extend smoothly and continuously along both said inner and outer surface portions of said packaging structure, with substantially the same radial curvature, from each one of said oppositely disposed side leg portions to said central base portion, and wherein said corner regions will exhibit good flexural beam strength resistance properties in view of the fact that said corner regions of said packaging container comprise all of said plies of material comprising said packaging structure.