Popcorn package for microwave popping

Claim 1

A package of popcorn within a bag which functions as a popping container ready for popping in a microwave oven comprising in combination, a. an expandable package formed from a paper bag provided with longitudinally extending gussets therein to promote the expansion of the bag, b. a layer of grease proof flexible sheet material lining the bag to prevent oil absorption by the paper during storage and microwave popping therein, c. said bag being sealed transversely along the bottom thereof and being folded downwardly along the top edge thereof to retain the top portions of the gussets in place when the bag expands, d. a transversely extending tape means adhesively bonded to the downwardly folded portion and to a portion at the top of the bag adjacent to and immediately below the downwardly folded portion, the top of the bag gussets being held in place by the downwardly folded section of the top edge of the bag and the tape means, e. a rip means attached to the bag for opening the bag, f. said bag having no steam exhaust opening therein, thereby allowing internal pressure to develop to expand the bag when heated to provide an expansion space for the popped corn kernels, g. a charge in the bag consisting essentially of about 8 parts of popcorn in an unpopped condition, about 3 parts of fat, excluding butter, and a quantity of salt, h. said charge of corn, fat and salt being located in the center portion of the bag between said top edge and said bottom thereof and spaced from said top and said bottom edges whereby at least 75% of the corn will pop when placed in a microwave oven having a capacity of 600 to about 1400 watts with less than about 5% of the kernels being scorched during popping.