Classifying – separating – and assorting solids – Plural – diverse separating operations – Including sorting of special items or sorting by methods or...
Patent
1995-01-30
1997-06-24
Bollinger, David H.
Classifying, separating, and assorting solids
Plural, diverse separating operations
Including sorting of special items or sorting by methods or...
209630, 209632, 209703, 209930, B03B 700
Patent
active
056410697
ABSTRACT:
A process and apparatus are presented for mixed recyclable separation, storage and debris removal via gravitational and vibrational forces, three dimensional screening, negative sortation and positive ergonomically designed human sortation.
Mixed recyclables placed within a tube are propelled upward for ergonomically advantageous manual sortation. Material not removed by the first sorter is negatively sorted onto vibrating parallel bars. Desirable materials pass through the bars into a vibrating concave funnel shaped screen. Dirt, debris and any materials smaller in size than the smallest desired recyclable are removed by vibrational and gravitational forces within the three dimensional screen. This results in removal of dirt and debris by outward movement through vertically and horizontally oriented screen voids, in contrast to existing systems in which two dimensional, horizontally mounted screens are employed. Mixed recyclables remain in the vibrating concave funnel shaped screen until sufficient time has elapsed for concentrated layers of similar specific gravity and size items to develop. For example, discrete layers of similar size glass containers and similar size aluminum containers develop within this vibrational concave funnel shaped screen. Upon development of these discrete layers, the bottom layer is released onto a conveyor belt for manual removal and placement into a storage bin designated for this layer. Successively higher layers follow onto the conveyor belt and are manually removed and placed into their respective storage bins. Use of adjustable sortation platforms throughout the system results in ergonomic benefits to the sorters and increased manual sortation efficiency.
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