| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a packaging bag for a microwave oven, easy to be unsealed after automatically opened by internal vapor generated by the heating of the microwave oven. <P>SOLUTION: The packaging bag 1 for the microwave oven has both sides of a single rectangular film formed of butt-seamed heat-sealed parts 1A obtained by heat-sealing, one of end formed of one end heat-sealed part 1B obtained by heat-sealing, and the other end formed of the other end heat-sealed part 1C obtained by heat-sealing. The butt-seamed heat-sealed part 1A is a weaker seal than the heat-sealed parts 1B and 1C, serving as a region for forming an automatic opening for the internal vapor generated by the heating of the microwave oven, and has a non-heat-sealed part 1A' left which has not been heat-sealed to the butt-seamed edge of the film of the heat-sealed part 1A. <P>COPYRIGHT: (C)2007,JPO&INPIT |
