| 摘要 |
<p>A cutting device comprising an ultrasonic vibrating device and a cutting blade (19) mounted on the device so as to be vibrated thereby, the blade (19) lying in a plane transverse to the axis of vibration characterised in that the ultrasonic vibrating device comprises an ultrasonic horn (12) having more than two projections arranged symmetrically arount the nodal point (17), each projection having a vibrating face (13,14,15,16) at a distance of a quarter wavelength from the nodal point (17), one of the vibrating faces being secured to a transducer (10) either directly or indirectly. <IMAGE></p> |
