<p>A packaging machine comprises a rotor (22) having radial mandrels (21) each adapted to carry a tubular blank (11) of square to rectangular cross section as fitted therearound and arranged to successively stop at a plurality of processing stations I to VIII, a group of devices (23 to 28) arranged respectively at the required stations among the processing stations I to VIII for folding and closing a container bottom forming end portion (14) of the blank (11) as fitted around the mandrel (21), and an air suction nozzle (31) for collecting extraneous matter is disposed at a required location along a path of movement of the mandrel. <IMAGE></p>
