Patent ID: 7364359
Filing Date: 2008-04-29
Classification: B31B,B32B,B65D,Y10T

Abstract:
1. A bag made of at least one laminated film, said at least one laminated film being formed in the shape of a bag opened on one side thereof; wherein said at least one laminated film comprises: an outer-layer-film including one or more layers; a water-soluble film; and an intermediate layer interposed between said outer-layer-film and said water-soluble film; said outer-layer-film and said intermediate layer adhere fast to each other; said intermediate layer and said water-soluble film directly contact each other and adhere so weakly to each other as to be peelable; said at least one laminated film is superposed so that said water-soluble film is positioned inside; prescribed portions of the superposed laminated film are heat-sealed so that the parts of said water-soluble film facing to each other at the prescribed portions are fused to each other; a non-heat-sealed portion and a heat-sealed portion are formed in a mutually adjoining state in an area outside a heat-sealed portion enclosing an area of the superposed laminated film destined to accommodate a commodity in a sealed condition after said intermediate layer and said water-soluble film have been peeled from each other; one end of a boundary line between said non-heat-sealed portion in said outside area and said heat-sealed portion in said outside area reaches an outer edge of said bag on which a front side part of said laminated film and a rear side part of said laminated film do not continue into each other; a part of a peripheral edge of said non-heat-sealed portion in said outside area, which continues to said boundary line, forms a part of the outer edge of said bag on which said front side part of said laminated film and said rear side part of said laminated film do not continue into each other; and a part of the peripheral edge of said heat-sealed portion in said outside area, which continues to said boundary line, forms a part of the outer edge of said bag on which said front side part of said laminated film and said rear side part of said laminated film do not continue into each other, wherein a slit piercing said laminate film is formed in said outside area in such a manner that one end of said slit reaches the outer edge of said bag on which said front side part of said laminated film and said rear side part of said laminated film do not continue into each other; and a part of the peripheral edge of said heat-sealed portion in said outside area, which confronts said boundary line, coincides with at least a part of said slit.