| 摘要 |
A plurality of elongated, generally side-by-side conveyor tubes (28) are positio ned within a material container (10) to provide spaces (30) between the conveyor tub es (28). A drive mechanism (DM) is connected to ends of the conveyor tubes (28), for recipr ocating the conveyor tubes (28). The drive mechanism (DM) functions to move the conveyor tub es (28) in one direction, for moving material that is on and between the conveyor tubes (28), and for retracting the conveyor tubes (28) in the opposite direction.
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