Patent ID: 7882999
Filing Date: 2011-02-08
Classification: B65D,Y10S

Abstract:
1. A corner structure for a tray or tray cover of the type formed from a unitary blank of paperboard, said tray or tray cover having an inside and outside surface, said corner structure having a quadrilateral main panel with right angle corners and a pair of outer side panels each having opposite side edges and inner surfaces and said outer side panels having adjacent end edges and being foldably joined along one of said side edges respectively to edges of said main panel along fold lines which intersect at a corner of the tray, said outer side panels being perpendicular to said main panel, collapsed web structure foldably joined to the adjacent end edges of said outer side panels, a pair of inner side panels having opposite edges and foldably joined respectively along one of said edges to the other of said edges of said outer side panels which are remote from said main panel, said inner side panels having adjacent end edges and one of said inner side panels having a lower corner, each of said inner side panels being disposed in flat face contacting relation with the inner surface of its associated outer side panel, one of said inner side panels being of rectangular configuration and the end edge of the other of said inner side panels being configured to define the shorter parallel side of a trapezoid and another diagonal intersecting locking edge of said trapezoid, a base flap foldably joined respectively to each of said inner side panels along a fold line at the other edge thereof which is adjacent said main panel, said base flaps having adjacent ends and being disposed in flat face contacting relation with said main panel and an end edge of the base flap which is foldably joined to said other inner side panel intersecting an end of said shorter parallel side of said trapezoid, and a locking tab of trapezoidal configuration foldably joined along a fold line having a memory to the adjacent end of the one of said base flaps which is foldably joined to said one of said inner side walls, said locking tab having a lower edge and a locking edge and being disposed in perpendicular relation to its associated base flap and with its locking edge in engagement with said locking edge of said other inner side panel, an extending tab integral with and projecting longitudinally from said adjacent end of the one of said base flaps which is foldably joined to said other inner side panel, said extending tab defining a cutaway end portion of its associated base flap which affords space into which the lower edge of the adjacent locking tab is disposed so that the memory along the tab fold line causes the tab to press against the inner surface of the adjacent outer side panel and also causes said locking edge of said locking tab securely to engage said locking edge of said other inner side panel, wherein the improvement comprises decorative paper being held in juxtaposition to the outside surface of the tray or tray cover, said paper forming a corner not supported by paperboard that extends beyond said corner formed by paperboard, said paper having a slit through the mid-section of the paper corner not supported by paperboard, so the paper can be folded with the folding of the paperboard to form a neat square corner when a tray or tray lid is formed.