US Patent 11180305 Microwave pouch

To provide a microwave pouch that favorably prevents both of hole formation of the pouch and spurting of contents, with a simple structure. A microwave pouch (10) includes a self-venting mechanism (20). The self-venting mechanism (20) has an annular venting seal (30), a steam release part (40) surrounded by the venting seal (30), and a movable piece (60) defined by a slit (50) formed in the steam release part (40). The venting seal (30) has a seal peel initiation part (31) where peeling is started by steam generated inside the pouch (10) during heating. The slit (50) includes slit both ends (51), and a slit intermediate part (52) formed to extend from the slit both ends (51) toward a region away from the seal peel initiation part (31) and connecting the slit both ends.