| 摘要 |
<p>The resistance element (resistor) used consists of a thin-walled metal tube (1) extending along a platen (plate) (3) in a path corresponding to the shape of the weld (seam) desired, the said tube being internally filled with a continuously circulating heat-transfer fluid (15). The welding and cutting edge (14) of the tube is subjected to a complementary air-cooling jet. Application to the welding of plastic bags. <IMAGE></p> |
