| 摘要 |
Manufacture of packing containers of the non-returnable type for milk and other dairy products takes place by means of packing machines wherein tubula packing container blanks are provided with bottoms, filled with contents and sealed. The tubular packing container blanks are of substantially square cross-section and are provided at their bottom end with a number of wall panels which in the machine, by means of folding down and sealing, are formed to a liquid-tight bottom. An arrangement for forming of the bottom packing containers consists of two co-operating folding devices (20) provided with projecting fingers (33, 34) which are situated right opposite each other on either side of the bottom wall panels of the packing container blank (1). The packing container blank is placed on a mandrel (12) which passes between the folding devices, the latter being rotated synchronously with the movement of th mandrel so that the bottom wall panels are folded down to the desired position by the fingers. |
