Expandable food container

Claim 1

An expandable package for holding unpopped popcorn in an oven and which is readily openable and expandable for holding said popcorn after it has been popped, said package being pentagonal at the botom and hexagonal at the top and being formed from a unitary blank of foldable sheet material, such as paperboard, and comprising: (a) an elongated pentagonal bottom wall panel having a plurality of side wall panels foldably joined to side edges thereof, and to each other, and sloping upwardly and outwardly therefrom to present at the upper edges thereof a hexagonal configuration; (b) said side wall panels including: (i) three trapezoid shaped first panels foldably joined to three adjacent side edges of said bottom wall panel; (ii) two parallelogram shaped second panels foldably joined to the remaining two side edges of said bottom wall panel; (iii) said first and second panels defining five side wall panels which outline at the bottom thereof the pentagonal shape at the bottom of the package; (c) one triangular shaped third panel foldably joined to a side edge of one of said second panels and forming a sixth side wall panel located between said second panels with one of the sides of said triangular-shaped third panel located at the top of said package to outline in combination with the top edges of said five side wall panels the hexagonal shape at the top of the package; (d) six top closure panels foldably joined to upper edges of respective side wall panels and being folded over into overlapped relation to form a hexagonal shaped cover; (e) certain of said closure panels being detachably secured with respect to each other, so that when popcorn in the package expands said closure flaps can separate from each other to form an open top receptacle.