Patent ID: 7476030

Claim:
A fastener bag comprising: a packaging bag having a packaging bag body formed as a tubular structure for containing an article therein, and a heat-sealed butt seam, the packaging bag body and the heat-sealed butt seam being formed by folding one sheet of a packaging sheet and by two heat-sealing side parts of the packaging sheet so that the packaging bag body and the heat-sealed butt seam directly adjoin each other; and a fastening device attached to an inner surface of the packaging bag body; wherein the fastening device includes separate male and female fastening members, the male fastening member is disposed at a position on the packaging body except at a position of the heat-sealed butt seam and on one side of the heat-sealed butt seam of the packaging bag body, the female fastening member is disposed at a position on the packaging body except at the position of the heat-sealed butt seam and on the other side of the heat-sealed butt seam of the packaging bag body so as to be engaged with the male fastening member, and the female fastening member having a female base part which is bonded to an inner surface of the packaging bag body and a female fastening part projecting from the female base part, the male fastening member having a male base part which is bonded to the inner surface of the packaging bag body and a male fastening part projecting from the male base part and being capable of being fastened with the female fastening part, one of the female base part and the male base part is bonded to the inner surface of the packaging bag body on a same surface positioned on a same side to a corresponding one of the female fastening part and the male fastening part, and the other of the female base part and the male base part is bonded to the inner surface of the packaging bag body on an opposite surface positioned to an opposite side to a corresponding other of the female fastening part and the male fastening part, and further comprising: a tear-facilitating means is disposed between the male base part and the female base part.