DESTONER
An Oliver Manufacturing Company destoner uses air as a standard rather
than water. Since air is lighter than water, the relative difference
between particles of differing weights is widened. For this reason, the
destoner is a very, sensitive machine and, when operated correctly, can
produce a very precise separation.
Keep in mind at all times that the destoner is not a "cure all" for the
processor's problems. The destoner is a specialized piece of machinery
designed to do one job very well. The de-stoner separates particles of a
similar size that differ in weight, eliminating heavy trash and stones.
The stoner should not be used as a cleaning machine to remove dust,
dirt, sticks and other refuse frequently found in harvested crops. In
all processing situations, the best results are obtained from the
stoner when the product has been thoroughly pre-cleaned and sized,
using the proper equipment for these purposes. Under these conditions,
the destoner is then able to show what it can really do!
The most important part of the destoner is the deck, because it is the
main separating surface. It consists of a carefully constructed wooden
frame to counteract false vibrations with a screen or cloth overcover
that is the surface on which the separation takes place.
What occurs on a destoner's stoner deck is that compressed air is
forced through the mesh of the deck cover lifts the lighter particles
upward, while heavier particles sink against the air currents and come
to rest on the deck surface, providing the air is properly adjusted.
The heavier particles are forced to travel uphill by mechanical action,
while the lighter particies float downhill on a film of air.
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