NEW PULP STRAINER, SAID ROTARY STRAINER
Year: 1874

page_text: PROVISIONAL SPÉCIFICATION left by Leandre Elie at the Office of
the Commissioners of Patents, with his Petition, on the 4th April
1874.
I, LEANDRE ELLE, of Cothiers, in the Department of the Charente,
and in the Republic of France, Manufacturer, do hereby declare the nature
of the said Invention for "NEW PULP STRAINER, SAID ROTARY STRAINER,"
to be as follows :-
66
The pulp strainer the subject of my Invention works continuously,
is self-cleaning, and does not require that the paper making machine
should be stopped for the cleaning. It is composed of a bronze cylinder
of one piece; the surface of this cylinder is divided in the direction of
its circumference and in its entire length by perfectly regular slits or
slots, the openings of which may vary from two-tenths of a millimètre up
to a millimètre.
Between each row of slits or openings and in the entire length of the
cylinder is a solid part which serves to tie the rows of openings together.
This solid part between each row of openings is covered both inside and
outside the cylinder by the two halves cither of a small tube or of a

page_text: copper bar, which two halves are riveted or soldered upon the cylinder
interiorly and exteriorly.
The two ends of the cylinder are closed by two plugs with ring or
collar. The diameter of the opening of this collar is half the diameter
of the pulp strainer. These collars serve as. spindles for the pulp
straining cylinder. This cylinder is set rotating either by a series of
toothed gearing or by an endless screw, the whole so that the cylinder
makes about six revolutions a minute.
Within the pulp strainer is placed a copper slab with hinges, which
slab when open occupies from one-third to half the inner diameter of the
pulp strainer without however touching the sides of the cylinder. This
slab rests upon two supports which may be removed at pleasure, and onc
of its ends extends beyond the cylinder.
Above the pulp straining cylinder and carried by two forks is placed
a copper watering tube pierced with a number of small holes.
The two collars serving as spindles to the pulp straining cylinder rest
and are enclosed in two bearings in which they may move. These two
bearings are attached on one side to the box or trough placed beneath
the pulp straining cylinder and form hinge, and on the other side rest by
mcans of two arms each upon a ratchet wheel keyed on a small shaft
and set in motion by a pulley.
The pulp straining cylinder may be of any length and different
diameter, according to the width of the paper-making machine.
Beneath the pulp straining cylinder is a box or trough intended to
receive the strained pulp and carry it to the manufacturing table of
the paper-making machine. Everything being 'thus arranged the paper
pulp arrives by two small slabs into the two ends of the pulp straining
cylinder and interiorly. These two small slabs are beneath the hinged
slab herein-after referred to. At the same time that the paper pulp to
be strained arrives in the cylinder this latter receives its rotary motion,
the watering tube placed above receives a current of water under great
pressure and gives a great number of powerful jets.
The pulp passes through the slits or openings in the straining cylinder
from the interior to the exterior with the exception of knots and other
impurities which enter but cannot pass through the slits. The cylinder
in rotating brings these impurities under the jets from the watering tube;

page_text: F, inner hinged slab intended to receive the impurities and the water
from the watering tube.
G, small slabs conducting the pulp to be strained into the interior of
the cylinder.
E, watering tube pierced with small holes sending the water in 5
powerful jets upon the cylinder to clean it inside and out.
H, box or trough to receive the strained pulp and lead it to the paper'
making table.
I, small reservoir receiving the impurities and the water from the
watering tube falling upon the hinged slab.
J, small toothed wheel taking into other gearing to drive the
cylinder.
'
Q, plugs with rings or collars closing the cylinder at the two ends, the
rings serving as spindles to the cylinder.
P, bearings supporting the collars or rings of the plugs fixed at N to 1
the box or trough H by a hinge joint and resting at L upon a ratchet K
which on turning gives a shock to the cylinder.
M; forks upholding the watering tube E.