| 摘要 |
<p>Disclosed is a machine comprising a housing, means disposed inside (3) the tubular film (1) to separate the walls thereof, means (8) guiding the tubular film, and an inflating sealing device (5, 6, 7, 12). Said inflating sealing device is provided with at least one hollow needle (5) for inflating and means (2, 2a, 2b) preventing air from escaping towards said reel, i.e. upstream. Said means (2) preventing air from escaping are arranged between the means disposed inside (3) said film and the reel. The inflating sealing device (5, 6, 7, 12) is arranged after the means disposed inside (3) said film and before the guiding means (8) of said film such that the tubular film (1) is pulled through the inflating sealing device. The hollow needle (5) of the inflating sealing device is fixed to a first lever arm (12) which is disposed on one side of said film and is controlled by a first actuator (13). Two heating elements (6) are positioned upstream and downstream from the needle and are fixed to a second lever arm (10) which is disposed on the other side of said film and is controlled by a second actuator (11). The means preventing the air fed into the tubular film from escaping towards said reel, i.e. upstream, comprise an elongate element (2b) which extends in a transversal direction relative to the film (1) and is fixed to said first lever arm (12) such that said elongate element (2b) is kept away from the film during movement thereof and is inserted into a slot (2a) arranged in a plate (2) of the machine housing and pushes said film into the slot, creating a narrow fold thereon.</p> |
