Patent ID: 8276755
Filing Date: 2012-10-02
Classification: B29C,B29L,B65D

Abstract:
1. A flexible container comprising: a cylindrical member made from flexible film; a bottom plate member which is harder than the flexible film, fitted into the inner side of a first end section of said cylindrical member and fused-bonded airtightly, wherein outer diameter of said bottom plate member is smaller than outer diameter of said cylindrical member; and a ring member which is harder than the flexible film, fitted into the inner side of a second end section of said cylindrical member and fused-bonded airtightly, wherein a fitting section comprising a circumference projection section is formed on an external circumference of at least one of the bottom plate member and the ring member, said external circumference being fused-bonded to the cylindrical member, in such manner that the circumference projection section is formed in a continuous waveform shape along a periphery of the external circumference so as to project outward from the external circumference, a progressing direction of the waveform shape is arranged in a circumferential direction of the external circumference, and a direction of the wave-shaped oscillation of the circumference projection section is arranged in an axial direction of the external circumference before being fused-bonded to the cylindrical member.