| 摘要 |
The apparatus is adapted to weld ultrasonically two or more layers of fabric 14. The fabrics 14 may be a woven or non-woven fabric of nylon, polyethylene or other polymeric material. It comprises two opposed ultrasonically vibratable horns (1, 1a) so spaced one from another that the layers of fabric (3) may be passed between them. At least one, optionally both, of the two horns (1, 1a) is vibratable in axial mode. |
