Knowledge is power : $b A view of the productive forces of modern society and the results of labor, capital and skill.Knight, Charles
Philosophy
Knowledge is power : $b A view of the productive forces of modern society and the results of labor, capital and skill.
Knight, Charles
Industrial arts; Industries
At one extremity of the machine is a chest, full of stuff or pulp. We
mount the steps by its side, and see a long beam rolling incessantly
round this capacious vessel, and thus keeping the fibres of linen, which
look like snow flakes, perpetually moving, and consequently equally
suspended, in the water. At the bottom of the chest, and above the vat,
there is a cock through which we observe a continuous stream of pulp
flowing into the vat; which is, always, therefore, filled to a certain
height. From the upper to the lower part of this vat a portion of the
pulp flows upon a narrow wire frame, which constantly jumps up and down
with a noise resembling a cherry-clack. Having passed through the
sifter, the pulp flows still onward to a ledge, over which it falls in a
regular stream, like a sheet of water over a smooth dam. Here we see it
caught upon a plane, which presents an uninterrupted surface of five or
six feet, upon which the pulp seems evenly spread, as a napkin upon a
table. A more accurate inspection shows us that this plane is constantly
moving onwards with a gradual pace; that it has also a shaking motion
from side to side; and that it is perforated all over with little
holes--in fact, that it is an endless web of the finest wire. If we
touch the pulp at the end of the plane, upon which it first descends, we
find it fluid; if we draw the finger over its edge at the other end, we
perceive that it is still soft--not so hard, perhaps, as wet
blotting-paper,--but so completely formed, that the touch will leave a
hole, which we may trace forward till the paper is perfectly made. The
pulp does not flow over the sides of the plane, we observe, because a
strap, on each side, constantly moving and passing upon its edges,
regulates the width. After we pass the wheels upon which these straps
terminate, we perceive that the paper is sufficiently formed not to
require any further boundary to define its size;--the pulp has ceased to
be fluid. But it is yet tender and wet. The paper is not yet completely
off the plane of wire; before it quits it, another roller, which is
clothed with felt, and upon which a stream of cold water is constantly
flowing subjects it to pressure. The paper has at length left what
may be called the region of wire, and has entered that of cloth. A
tight surface of flannel, or felt, is moving onwards with the same
regular march as the web of wire. Like the wire, the felt is what is
called endless,--that is, united at the extremities, as a jack-towel is.
We see the sheet travelling up an inclined plane of this stretched
flannel, which gradually absorbs its moisture. It is now seized between
two rollers, which powerfully squeeze it. It goes travelling up another
inclined plane of flannel, and then passes through a second pair of
pressing-rollers. It has now left the region of cloth, and has entered
that of heat. The paper, up to this point, is quite formed; but it is
fragile and damp.
Public-domain text, read in full here on John Shaqi.
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