The method that is disclosed enables specific information network traffic flows to retain packet ordering in a packet network in which multipath techniques are used. The injection nozzles are arranged between the molding spaces. The initial set of parameter values is used to identify other sets of parameter values as other potential candidates for transmitting the signal. The controller controls an ignition timing on the basis of a result of the determination. The speed of advance of the sequence of information elements and hence the dwell time for display of each information element is manually adjusted from time to time.