| 摘要 |
<p>A hopper 10 for tobacco includes a delivery roller 12 made up of four roller sections 12a,b,c,d. Operation of each section is controlled by a respective photo sensitive cell 20a,b,c,d which sends a signal causing the respective roller section to cease rotating in response to sensing a build up of tobacco on the carded drum 18 below the delivery roller in the hopper exit. <IMAGE></p> |
