Patent ID: 7063228

Claim:
Packaging bag for heating with en electromagnetic wave heating system, which comprises a lower member and an upper member, each of which is made of a composite film which has a sealant layer on at least one side, wherein said lower member uses the sealant side as the upper face, a portion of said upper member forms a wing part by doubling the portion while facing the sealant layer and sealing the open end edges of the doubled portion, the remaining portion of said upper member is superimposed on the lower member so that the sealant side of the remaining portion is used as the lower face to be opposite to the upper face of the lower member, and the edges of superimposed members are sealed, and wherein the wing part comprises a point-seal part formed therein, and a means for venting steam located within an area which is isolated from the first and second internal spaces by the point-seal part.