All are strengthened by ribs
(as shown in Fig. 8), and each is fixed by 4 bolts, _c_, 20mm. in
diameter. The pitch of the helices of each tooth is very elongated,
and reaches about 7.52 m. The depth of the toothing is 18 mm.
_Frame and Endless Chain._--The cylinder thus constructed rotates with
a velocity of 50 revolutions per minute over a cylindrical vessel, B',
cast in a piece with the frame, B. This vessel is lined with two
series of tempered cast iron plates, D and D', called exit and
entrance plates, which rest thereon, through the intermedium of well
dressed pedicels, and which are held in place by six 20-millimeter
bolts. Their length is 708 mm. The entrance plates, D, are provided
with 6 spiral channels, whose pitch is equal to that of the channels
of the decorticating cylinder, C, and in the same direction. The depth
of the toothing is 10 mm.
The exit plates, D', are provided with 7 spiral channels of the same
pitch and direction as those of the preceding, but the depth of which
increases from 2 to 10 mm. The axis of the decorticating cylinder does
not coincide with that of the vessel, B', so that the free interval
for the passage of the cane continues to diminish from the entrance to
the exit.
The passage of the cane to the decorticator gives rise to a small
quantity of juice, which flows through two orifices, _b'_, into a sort
of cast iron trough, G, suspended beneath the vessel.
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