| 摘要 |
PROBLEM TO BE SOLVED: To provide a safe packaging bag for sandwich in which its seal can be easily opened through one finger touch, a form of the bag at the time of packaging can be kept even after opening the seal, the sandwich not eaten can be stored, kept in a sanitary state, it is not necessary to apply a cutting tape or a single axis extension film having an opening tearing characteristic or a special sealing adhesive tape, it can be manufactured at a low cost and a virgin characteristic at the time of opening seal is assured. SOLUTION: A substantial trapezoidal front film and a substantial trapezoidal rear film are overlapped to each other to cause upper edges of both films and both side edges of both films to be connected to each other, a triangular-shaped sandwich is stored through a lower end opening, the lower part of the film is folded at four corners, they are closed to each other by the adhesive tape and the sandwich is packaged. Either the front film or the rear film is provided with a seal opening knob piece to which a desired slit is applied. The seal opening knob piece is held with a hand to tear the film in a belt-like manner, wherein the two tearing knob pieces are held to cause the film to be torn out and the adhesive tape is directed toward the lower end of the film, the closing films are overlapped to each other and adhered in such a way that the slit is closed.
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