Abstract: An expandable microwave popcorn package which contains a charge of popcorn kernels suitable for preparation in a microwave oven. The package is formed of front and back panels preferably joined together at the top and bottom ends and at the sides by side panels. The back panel includes two or more sections which are joined along slightly overlapping edges and bonded together by a releasable adhesive, thereby forming lap seam(s). Conversion of the package into a serving vessel is made possible by the releasable nature of the adhesive which allows the lap seam(s) to be disengaged after the popping process is complete. Thus the back panel sections can be detached, and possibly removed, to expose the popcorn within the package. Ideally the heat and steam created by the popping process will diminish the bonding strength of the releasable adhesive thereby enhancing the conversion.

Abstract: An expandable microwave popcorn package which contains a charge of popcorn kernels for preparation in a microwave oven. The package is formed of front and back panels preferably joined together at the top and bottom ends by an adhesive and at the sides by side panels. The back panel includes a pair of separation lines along which the package material is relatively weak such that a portion of the back panel can be torn from the remainder of the package to expose the popcorn within. Separation lines may be formed by weakening a portion of the bag substrate, by reinforcing the adjacent areas, or by a combination of the two. Side panels are folded to form gussets which allow the package to remain flat during storage, to expand to accommodate the popped kernels. A susceptor is also preferably placed on the front panel opposite the back panel to enhance the popping action.