Flexible container apparatus with substantially rectangular-bottomed configuration

A sealable, flexible container apparatus for use in storing, shipping and cooking various articles contained therewithin in an oven, said container apparatus having an exterior and an interior structure for converting a substantially pinch-ended bottom into a rectangular bottomed bag configuration during cooking of the articles contained therewithin, said container apparatus comprising:

• bag means for containing said articles, said bag means including a front panel, a back panel, a first gusseted side panel, a second gusseted side panel, and a longitudinal axis substantially parallel to each of said front panel, back panel, first gusseted side panel, and second gusseted side panel,
• each of said front, back and side panels having an interior surface, an exterior surface, a top edge and a bottom edge, said top and bottom edges of said front, back and gusseted side panels collectively defining a top and a bottom of said container apparatus, respectively,
• said front and back panels each having a first side edge and a second side edge, said first and second side edges being substantially parallel to each other,
• said front and back panels positioned opposite each other and connected at said respective first and second side edges to said first and second gusseted side panels, respectively, so as to form a substantially tubular configuration;
• first sealing means substantially transverse to said longitudinal axis for permanently sealing each of said front, back, and gusseted side panels to one another proximate to said respective bottom edges of each of said front, back, and side panels, said first sealing means connecting said front, back and gusseted side panels to collectively seal said bottom of said sealable container apparatus;
• and
• second sealing means for converting said substantially pinch-ended bottom to said substantially rectangular bottomed bag configuration and for permanently sealing each of said first and second gusseted side panels to each of said front and back panels, at said interior surfaces of said front, back, and first and second gusseted side panels, at a position proximate to said bottom of said sealable container apparatus,
• said second sealing means comprising a plurality of substantially quadrilateral regions, each of said substantially quadrilateral regions being positioned so as to dispose a diagonal of said quadrilateral region substantially collinear to a corresponding side edge of at least one of said front and back panels and proximate said first sealing means,
• said positioning of said plurality of substantially quadrilateral regions serving to articulate said bottom of said container apparatus into a substantially rectangular configuration upon expansion of said bag means upon pressure generated by cooking said articles contained therewithin, while simultaneously distributing said pressure resulting from said cooking of said cooking articles substantially uniformly proximate said bottom of said bag, to, in turn, improve resistance against the unintentional leakage of at least one of said pressure and said cooking articles through and beyond said first sealing means.