Method for operating a flow-wrapping machine

A method for operating a tubular bag machine (01) comprising a film web (03) which is capable of being unwound from a supply reel (02), a forming shoulder (04) for forming the film web (03) into a film tube (05), a film take-off unit (07) acting against the film tube (05) and serving to move the film tube (05) further, a longitudinal sealing device for welding shut the film tube (05) parallel to its transport direction by means of a longitudinal seam, a transverse sealing device (08) which has transverse jaws (09) movable against one another and welding shut the film tube (05) transversely to the transport direction for producing transverse seams, a separating element (11) for separating finished tubular bags (10) from the film tube (05), the tubular bag machine (01) being accelerated in a positive acceleration phase (15) from an initial speed to a target speed when starting or being decelerated in a negative acceleration phase (16) from the target speed to a final speed for stopping,

• the method comprising:
• during the positive acceleration phase or the negative acceleration phase, limiting a maximum acceleration or deceleration of the film web (03) in order to prevent tearing of the film web (03);
• and
• during the limiting step, changing at least one sealing parameter (18, 19, 20) of the transverse jaws (09) as a function of the current conveying speed (17) of the film web (03), wherein maintaining a quality of the transverse seams created by the transverse jaws (09).