Human lives are often freed of
their baser elements and restored to purity and beauty through the
chastening influences of tribulation or adversity; in like manner the
"whipper" carries the rags forward a step in the process of purification
that is necessary before they can be brought to their highest
usefulness. But the cleansing process, which is only a preparation for
what is to follow, does not end with the "whipper," which has served
merely to loosen, not to dislodge, a great deal of dust and dirt. The
final operation in the preliminary cleaning is performed by the "duster"
proper, which is a conical revolving sieve. As the mass of rags is
tossed and shaken about, the loosened dust is carried away by the
suction of the air, which draws the dust particles into tubes furnished
with suction fans. In most modern mills the rags are carried forward
from the "duster" on an endless belt, and a careful watch is kept upon
them as they emerge to detect the presence of unchopped pieces, buttons,
or other foreign substances. The journey of the rags over this endless
belt or conveyor terminates in a receiving-room, in the floor of which
there are several openings, and immediately below these the mouths of
the "digesters," which are in a room beneath.
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