| 摘要 |
<p>An apparatus and method are provided for continuously dispensing from a storage container (10) at a precise weight per unit time nonfree-flowing particulate material. A feeder (12) capable of discharging from the container (10) a precise volume per unit time of the particulate material is positioned to deposit the material onto a conveyor (30) of a continuous weigh scale (31) which, like the feeder (12), is driven by variable speed drive means under the control of computer control means responsive to changes in bulk density of the particulate material sensed by the weigh scale. There is an adjustable speed ratio driving connection between the feeder (12) and conveyor (30) for causing the conveyor (30) to be driven at a predetermined speed with respect to the speed of the feeder (12), and the control means as effective to cause shut off of the apparatus in the event that the bulk density of the particulate material exceeds predetermined minimum or maximum limits. Display means is provided to indicate the cause of such shut down and the need for appropriate adjustment of the speed of the conveyor (30) relative to that of the feeder (12).</p> |
