| 摘要 |
A high-speed folding unit (1) for producing, from pillow-pack packets (3), sealed parallelepiped packages (2) containing pourable food products, the unit having a continuous conveyor (21) for feeding the packets (3) along a forming path (B); a number of folding devices (24, 25, 26) located along the forming path (B); a heating device (27) acting on fold portions (15, 16) of each packet (3) to melt and seal the fold portions (15, 16) onto respective walls (12, 11) of the packet (3); and a final pressing device (28) cooperating with each packet (3) to hold the fold portions (15, 16) on the respective walls (12, 11) as the fold portions (15, 16) cool; the folding devices (24, 25, 26) and the final pressing device (28) having a number of interacting members (44, 50, 55, 58, 70, 71, 72) interacting with the packets (3), and which are of fixed size, and cooperate with the packets (3) by virtue of the movement of the conveyor (21).
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