a shim or one layer of carton between sealing jaw and the dolly loosen screw 148 which will allow the further spring arrangement 151 149 to bias the sealing jaw in a closing direction with a force determined by the properties of the coils spring 149 tighten screw 144 such as to lock the main spring cylinder 146 in its socket tighten screw 148 which will retract the further spring arrangement 151 149 such that its biasing effect is discontinued in use it is common to utilize the forming and sealing unit to operate at two or more packaging containers simultaneously in such a case the sealing jaw 104 may be divided cross its longitudinal direction such that it comprises two or more segments this may be utilized in such a way that each packaging container being formed and sealed using the inventive system will be handled by an individual segment in this way one segment will not be affected if there is an anomaly at the other segment examples of anomalies include the absence of a packaging container an unexpected thickness of the material etc the effect on the inventive suspension is that two or more duplicate suspension arrangements have to be used preferably two per segment of the sealing jaw in an alternative embodiment two main springs are used for each segment yet only.