| 摘要 |
<p>A constant a.c. voltage is applied to one capacitor plate and the screening plate, with the latter at earth potential, by one common fine filling channel, followed by a changeover deflector. When a preset coarse weight is reached in a first pan a control device releases the other coarse feeding channel and directs the fine filling channel to the first pan until the required weight is reached, and then redirects it to the other pan being filled. The two coarse feeding channels and the fine filling channel run parallel to each other, with the coarse channels being preferably symmetrical with respect to the fine channel.</p> |
