| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an internal bag that enhances the strength of an internal bag for a container and that facilitates the attachment of it to the container. <P>SOLUTION: Six sides, i.e., front and rear sides, top and bottom sides 6 and 7, and left and right sides 8 and 9 composing a bag body 2, are formed from a sheet raw material fusible by the application of heat and the abutting edges of the sides are welded by the application of heat and thus jointed. The left and right edges of at least the upper side 6 and the upper edges of the left and right sides 8 and 9 are overlapped and joined with the end edges oriented in the same direction, and then the overlapped portions are folded in four layers and integrally welded by the application of heat, thereby forming thick reinforcing joints 10 along these edges. <P>COPYRIGHT: (C)2011,JPO&INPIT |
