| 摘要 |
A multi-stage unit (1) for processing a web packaging material (2) in a machine for packaging food products, including a first processing station (3), a second processing station (5) and a system (7) for indexing the web packaging material (2) comprising a first feeding device (8, 9, 10) for step-feeding the web packaging material (2) through the first processing station (3), a second feeding device (16, 17, 18) for step-feeding the web packaging material (2) through the second processing station (5), and a control unit (14) controlling the first feeding device (8, 9, 10) in response to a sensor (15) detecting a first index code (C) pre-printed on the web packaging material (2), and the second feeding device (16, 17, 18) in response to a second sensor (20) detecting a second index code (4) made on the web packaging material (2) at said first processing station (3). <IMAGE> |
