| 摘要 |
<p>The auxiliary screw (205) is actuated by means of a motor (47) with electronic control, equipped with speed and phase transducers (147) connected to a logic unit (50-51-52-53) which by means of suitable transducers (146) notes the speed and the phase of any point of the kinematic chain which transmits the movement to the working carousel and to the main screw (105). In order cyclically to create a space in the main screw, the logic unit makes provision to slow down and then reaccelerate the motor of the auxiliary screw in such a manner that this screw is dephased by a complete revolution every two revolutions of the main screw and then resumes, at the end of the two revolutions, the speed and the phase of the main screw. Also described is the use of such a double-screw device (500), with synchro-tie, for controlling the flow of bottles leaving a working carousel, to bring about the rejection of any bottles which are not correctly filled or with other defects. <IMAGE></p> |
