| 摘要 |
Welding machine for welding plastic film webs with a heating device and two arms which are interconnected in an articulated manner and on which there is held in each case at least one roller, which rollers lie opposite one another and are arranged on spindles or shafts running parallel to one another, at least one of which rollers can be driven by means of a motor and the two arms are prestressed by means of a spring towards a position in which the free ends of the arms are brought close together. To ensure that the films, in particular thin films, are protected as extensively as possible during welding, it is provided that the driveable roller 19 has a border running essentially parallel to its axis of rotation 21 and that the roller 17 held on the second arm 3, acting as a counter-pressing roller, is produced from a relatively soft material, for example silicone, and preferably has a hardness of from 50 to 80 Shore. <IMAGE> |
