IMPROVEMENTS IN APPARATUS FOR THE PREPARATION OF PULP USED IN THE MANUFACTURE OF PAPER OR SIMILAR MATERIALS
Year: 1880

page_text: LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and
Company, Solicitors of Patents, of 67, Strand, in the City of Westminster,
Civil Engineer, for an Invention of "IMPROVEMENTS IN APPARATUS FOR
THE PREPARATION OF PULP USED IN THE MANUFACTURE OF PAPER OR
SIMILAR MATERIALS." A communication from abroad by Reinicke and Jasper,
of Cöthen, in the German Empire.
PROVISIONAL SPECIFICATION left by the said Herbert John Haddan at
the Office of the Commissioners of Patents on the 5th April 1880.;
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors
of Patents, of 67, Strand, in the City of Westminster, Civil Engineer.
" IMPROVEMENTS IN APPARATUS FOR THE PREPARATION OF PULP USED IN THE
MANUFACTURE OF PAPER OR SIMILAR MATERIALS." A communication from abroad
by Reinicke and Jasper, of Cöthen, in the German Empire.
The Invention relates to revolving sieves or knotters for separating knots from
the pulp from which paper or similar materials are made, and consists, first, in
supporting the horizontal sievo cylinder in such a manner that only a rotary but
no reciprocating motion of the cylinder is possible. Also in constructing the sieve
so that the pulp to be treated enters the cylinder from the circumference, and passes
afterwards through tubular journals at both sides of the cylinder into a collecting
channel provided with an overflow from where it leaves the machine. Also in
using a separate shaking mechanism consisting of a beam or beams, each moved by
a revolving arm or ratchet wheel, and guided by (two) rods provided with screw
nuts and rubber cushions for limiting and regulating the travel of the beam; (two)
spindles attached to the beam, and passing through stuffing boxes into the pulp
trough, where they carry at their ends a shaking plate or bottom moving to and
from the revolving sieve; springs acting upon the beam so as to accelerate its down
motion, the shaking bottom being made of one or more pieces curved to any desired
radius, plain or corrugated, perforated or solid, placed inside or outside, but preferably
outside the cylinder sieve. Also in cleansing the slits of the revolving cylinder by
"

page_text: placing inside the latter a perforated pipe throwing jets of water vertically through
the slits, the water used for cleansing, together with the knots carried with it, being
afterwards caught in a peculiarly shaped pipe formed of a curved piece of sheet
metal, of which both ends are rolled towards the concave (lower) side of the sheet,
so as to form two channels, leaving a space between them, through which the water
jets ascend until they are deflected to the right and left by the central part of the
concave sheet. Also in constructing the revolving cylinder of two or more curved
sheets, in which the slits are cut without the use of a special supporting frame, the
said sheets being joined by internal fish plates rivetted or soldered so as to leave.
the outside of the cylinder plain and smooth, each end of the cylinder sieve being 1
soldered on a ring attached to a hollow journal by screws.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Herbert John Haddan in the Great Seal Patent Office on the 4th
October 1880.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors
of Patents, of 67, Strand, in the City of Westminstor, Civil Engineer.
"IMPROVEMENTS IN APPARATUS FOR THE PREPARATION OF PULP USED IN
THE MANUFACTURE OF PAPER OR SIMILAR MATERIALS." A communication from
abroad by Reinicke and Jasper, of Cöthen, in the German Empire.
In the knotters or sieves hitherto in use the siove cylinder receives a slow
revolving and a quick shaking motion, thereby producing a great noise and
impairing the durability of the apparatus, which shaking motion of the cylinder
preventing a good junction of the feed and dischargo pipes with the cylinder. The
improved construction of knotter is intended to removo all these inconveniences.
Referring to the accompanying Drawings, Fig. 1 is an end view, Fig. 2 a longitu-
dinal section, and Fig. 3 a cross section of a knotting machine; Fig. 4 shows a part
of the cylinder cut through its axis. The manner in which the Invention is to be
performed is as follows:-The pulp is allowed to enter the machine at M of the
pulp trough L, L, and rises there until reaching tho line N¹, O', which level it
generally maintains. From said trough the pulp enters through the slits of the
sieve cylinder, the interior of the same (A, A, Figs. 2 and 3), after which it passes
through tubular jonrnals N, N, at both sides of the cylinder A into the collecting
channels O, O, Figs. 2 and 3, from whence it leaves the machine through the
overflow P, Figure 3. By this construction the pulp enters the sieve cylinder from
its circumference to its interior, and for that purpose the former is plain and smooth
on its outside. The principal improvement in the herein described machine consists
in supporting the sieve cylinder by packed bearings B1, B2, in such manner that no
shaking but only a revolving motion of said cylinder is obtained. The cylinder is
provided at its axis with stuffing boxes, and receives its motion from the main
shaft C through the adjustable crank pin a, slotted lever b, ratchet c, wheels d, e, f,
and shaft g. The shaft is provided with a collar h, held by the bearing i to
prevent the cylinder from being displaced lengthways. By adjusting the crank
pin a the velocity of the cylinder can be regulated, and by reversing the ratchet c
the revolution of said cylinder to the right or to the left can be effected; the effect
which has been hitherto obtained by a shaking motion of the cylinder being
obtained in the present Invention by the following device :-The main shaft C is
provided with two cam or ratchet wheels D, D, which impart up and down motion
to the beams E, E, by means of the cams K, K. Two spindles F, F, attached to
said beams, and passing through stuffing boxes M, M, into the pulp trough, carry
at their ends the shaking plates G, G, which latter move to and from the circum-
ference of the cylinder A, so as to vibrate the pulp and press it through the slits
of said cylinder. The said shaking bottom may be mado of one or more pieces,
curved to any desired radius, plain or corrugated, perforated or solid.
The
screw nuts with rubber washers (R, R, Fig. 3), attached to the rods serve for
limiting and regulating the travel of the reciprocating parts, and in order to
accelerate the down motion of the beams the springs H, H, are applied. The
knots entering the slits of the cylinder aro exposed to jets of water coming
from the perforated pipe Qinside the cylinder, said water jets being thrown
vertically through the slits, thereby washing the knots out of the same and carrying
them through the opening m into the peculiarly shaped pipe R where the water
containing the knots which have been washed out of the slits ascends until
it is deflected to the right and left into the channels n, n, of the said pipe.

page_text: The construction of the sieve cylinder is shown by Fig. 4; said cylinder consists of
any suitable number (the Drawing shows 3) of pieces of sheet metal or other
suitable material in which the slits are cut, the different pieces being then curved
and joined together by internal fish-plates rivetted or soldered so as to leave the
outside of the cylinder plain and smooth. The sieve plates are bent so that the
wide part of the slits is on the inside of the cylinder, each end of the cylinder being
soldered on a ring Oattached to the hollow journal N, N, by screws. The machine
may be provided with several cylinders having slits of different width for making
the apparatus suitable to strain various kinds of pulp.
1. The construction of a revolving sieve or knotter having a cylindrical sievo
placed horizontally in such a manner that only a revolving but no reciprocating
motion of said cylinder is obtained.
•
2. The arrangement of a sieve cylinder or knotter so constructed that the pulp
to be treated enters the sieve from outside, then leaves the apparatus through
hollow journals at both sides of the cylinder, and passes through a collecting channel
and overflows.
3. The application of a shaking mechanism isolated from the sieve cylinder, and
consisting of a beam or beams, guide bars, spindles attached to said beam or beams,
passing through stuffing boxes into the pulp trough, and carrying at their upper
ends the shaking bottom made of one or more pieces curved to any desired radius,
plain or corrugated, perforated or solid; placed outside the sieve cylinder with screw
nuts and rubber cushions for limiting and regulating the motion of the reciprocating
parts and springs for accelerating the down motion of said beam or beams, cams
attached to the beams, ratchet wheels mounted on the main shaft, and imparting
reciprocating motion to tho boam or beams.
4. The devico for cleaning the slits of knotters, consisting of a perforated tube
placed inside the cylinder, and throwing jets of water vertically up through the
slits, and a collecting tube which receives the water containing the knots, and has
a cross section, substantially as illustrated by the Drawings.
5. The construction of the sieve cylinder of two or more curved plates, in which
the slits are cut, and which are joined together by internal fish plates rivetted or
soldered so as to leave the outer surface plain and smooth, and without the use of
a special frame for supporting the plates; also the mode of connecting tho
cylindrical sievo with the hollow journals, all substantially as described and
illustrated by the Drawing.
In witness whereof, I, the said Herbert John Haddan, have hereunto set
my hand and seal this First day of October. A.D. 1880.