| 摘要 |
Grains or seeds are projected each at the same velocity in a stream; the grain or seed is caught at a first or second catching site depending on the trajectory that it has followed. Grain/seed that has fallen at the first catching site is collected separately from that falling at the second catching site. The two catching sites may be separated by an adjustable divider to adjust the quality of grain/seed collected from the different catching sites. The grain/seed may be cleaned by an adjustable air flow directed counter to the path of the grain/seed. Optionally the apparatus may be adjustable to enable it to be used for a pre-cleaning run before the grain/seed is graded or sorted. Separation thus occurs on the basis of differences in specific gravity and may be employed to separate out grains which have commenced germination. In a practical embodiment of apparatus, grain or seed is supplied in a regulated stream to a rotary impeller (51, Fig. 2, not shown) that projects it into a free-flight chamber (61) having an adjustable divider (74). <IMAGE> |
