Tan-ex-tract′cr.
A leaching device for extract-
[
2486]
ing the astringent matters from bark.
The bark is softened in water, and then passed through rollers into the saturating-tank, exposed in said tank to the action of beaters, elevated and passed through a series of leaches, where it is washed repeatedly until all the astringent properties contained therein are taken up by the wash.
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Apparatus for extracting tan-bark. |
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Apparatus for making extracts. |
Fig. 6185 shows an apparatus for making extracts from bark or other substances.
It has an additional or secondary tank and two sets of squeezing-rollers combined with the crushing-rollers, saturating-tank, and elevator, so that the astringent qualities will be disengaged and the pulp left finally in a condition to be used as fuel.
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Tang-chisel. |
