| 摘要 |
<p>A method for heat-welding at the corners lengths of profiles (10, 11) for sealing gaskets, for example for refrigerators or the like, of the type comprising at least one bellows-like extendible, or compressible, air chamber, which method comprises the steps of positioning two lengths of profile with their ends opposite to each other, heating said ends, while simultaneously choking (27, 28) each of said lengths of profile nearby said ends so as to completely occlude said air chamber (13) along the choking section, closing the mould (19, 20) in order to cause said pair of lengths of profile to come into mutual mating contact at their heated ends, and injecting air into the interior of said air chamber in the region comprised between the choking section and the ends of said lengths of profile.</p> |
