| 摘要 |
A sifting machine comprising a sieve box (11) mounted on a framework (10), free-swinging on a plurality of suspension canes (12), the framework (10) carrying a motor (13) which drives via belts (16) and pulleys (15, 17), a pair of vertical shafts (18), each carrying a throwing weight system (19, 20, 21) the shafts and their throwing weight systems being mounted outside the bounds of the sieve box (11), and having their mass distributed evenly above and below a horizontal plane passing through the center of gravity of the sieve box (11).
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