| 摘要 |
In a line (4) for packaging products in blisters (3a) made in a band (3) of polypropylene, a device (1) carries out the heat sealing of a film (2) onto the blister band (3). The device comprises a frame (7) supporting an upper plate (8) and a lower plate (9) with hollows (9a) suited to receive the blisters (3a). When the hollows (9a) match against the blisters (3a) of the overlying band (3) the plates (8,9) are brought near to each other so as to clamp, in a sealing station (P), the interposed film (2) and blister band (3). The device (1) allows the moving of the sealing station along the advancement direction (A) of the band (3) according to the longitudinal shortening of the band with respect to the steady state operation of the line (4). <IMAGE> |
