| 摘要 |
<p>This apparatus comprises, as is usually the case, a body having (i) a part (1a) that receives an oscillating holder (2) to which an assembly is adjustably fixed, said assembly including a converter (3) and a sonotrode (4), and (ii) a part (1b) that receives a counter tool or anvil placed in alignment with, and opposite the sonotrode (4). The assembly is secured to means for modifying the gap between the sonotrode (4) and the anvil and the pressure exerted by the sonotrode (4). The apparatus is also equipped with a means (11) in the form of an eccentric shaft which can be rotated from the exterior of the body and which includes: a double shouldered cylindrical bearing inserted, in a freely rotatable manner, in the thickness of the holder and of part of the body that receives the holder; and a zone with two threaded bearings that extend beyond said part of the body. The rotation of the shaft shifts the holder by a few micrometres in order precisely to readjust, and maintain, the setting for the pressure and the gap when the apparatus is used in any position, including an upside-down position, i.e. when the assembly is located below the anvil.</p> |
