All cut edges that are located inside a FIBC must be cut absolutely clean and there must be no beads of melt at the cut edges. The inner ring construction of a dimensionally stable FIBC consists of four material sections, which are always equipped with several cutouts. In order to get no residue at exactly these cutouts, but a fusion of the cut edge is guaranteed, only an ultrasonic cutting system can be used and it was exactly for this application, this ultrasonic cutting machine was developed. Since for cost reasons, five ultrasonic cutting heads are used and the individual sections sometimes require up to six mold cutouts, the number of cycles of the system is limited. However, two sections are always cut simultaneously. The directly mounted depositing device with its gripper tongs automates the machine to a large extent. Thus, no operator has to stand extra to the machine. It is sufficient that now and then a person removes the automatically deposited sections of the side of the machine and then stores in a lattice box. The blank data of the different shapes can be stored in the cutting menu and re-activated as needed by a simple key combination. The drives of the system are infinitely variable and thus allow an optimal adaptation of the required goods and cutting speed to the material to be processed. Another advantage is that the system is largely maintenance-free and user-friendly.