| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a packaging bag which can be heated in a microwave oven without using a packaging box or partition device and without permitting contents to boil over even if put in a flat bag. <P>SOLUTION: The packaging bag has four vertical and lateral sides, and includes edge thermally bonded portions formed on at least three side edges, any one of the edge thermally bonded portions being a main edge thermally bonded portion; and a steam vent means forming portion having steam vent means continuously or adjacently to the main edge thermally bonded portion. The bag further includes an oblique seal portion extended from the main edge thermally bonded portion to the edge thermally bonded portion formed on at least one side of the two vertical sides or two lateral sides adjacent to the main edge thermally bonded portion. <P>COPYRIGHT: (C)2012,JPO&INPIT |
