Patent ID: 6121597
Filing Date: 2000-09-19
Classification: B65D,Y10S,Y10T

Abstract:
A packaging bag for use in a microwave oven, said packaging bag comprising a bag body comprising an upper side sheet portion and an underside sheet portion and an upper fin seal portion formed on the upper side sheet portion, wherein said upper fin seal portion is formed of heat-sealed laminated films comprising an inner layer film and an outer layer film, and wherein said upper fin seal portion comprises a non-sealed portion connecting with a container portion of the bag body, a heat-sealed portion extending about a portion of said upper fin seal portion, a heat-sealed projected portion projected from said heat-sealed portion, and a weakly joined portion having a peel strength of 0.1 to 15 g/15 mm width formed between the inner layer film and the outer layer film at least surrounding the projected portion and connected with an outside end of the upper fin seal portion.