Patent ID: 8933381
Filing Date: 2015-01-13
Classification: B65D

Abstract:
1. A packaging pouch for a microwave oven hermetically sealed by heat-sealing with a plastic film, comprising: a peripheral edge seal portion and at least one steam releasing seal portion; wherein the steam releasing seal portion comprises an outer seal portion, a non-sealed portion adjacent to the outer seal portion, and a through-hole or semi through-hole that projects into the non-sealed portion; wherein a proximal edge of the through-hole or semi through-hole is disposed within the non-sealed portion and a distal edge of the through-hole or semi through-hole is disposed outside of the non-sealed portion; wherein the edges of the through-hole or semi through-hole define a hole region where a width of the hole region gradually increases from the proximal edge of the through-hole or semi through-hole toward the distal edge of the through-hole or semi through-hole; and wherein the hole region is further defined by at least one protrusion of the peripheral edge seal portion that extends into the distal edge toward the proximal edge to thereby divide the hole region into plural chambers.