| 摘要 |
A heat sealing element (13) and related self aligning support jaw, for sealing at least two layers of thermoplastic film is disclosed. It may be used with a vertical form, fill and seal machine for packaging flowable materials, e.g. milk, chocolate fudge, or sundae topping, in pouches. Each end of the heat-sealing element has a plug which is preferably cylindrical, both pointing in the same direction, adapted to fit into spring-loaded sockets (14) which are slightly larger than the plugs, with openings toward the element. This permits unspringing the sockets and inserting the plugs, then letting the springs apply tension force to hold the elements taut.
|
