Improvements in Machinery or Apparatus for Making or Treating Paper Pulp.
Year: 1898

page_text: Date of Application, 15:h Dec., 1898
Complete Specification Left, 15th Sept., 1899-Accepted, 28th Oct., 1899
PROVISIONAL SPECIFICATION.
Improvements in Machinery or Apparatus for Making or Treating
Paper Pulp.
We, ANDREW MASSON and ROBERT SCOTT, both of York Place, New Wands-
worth, Surrey, Engineers, do hereby declare the nature of this invention to be
as follows:-
The object of this invention is to enable the treatment of esparto, wood and
other pulps, in the manufacture of paper, to be continuously carried out by
automatically operating means, so as, among other advantages, to avoid the
customary handling thereof between the successive operations to which it is
subject, and the liability of its becoming soiled by carelessness in the handling
or the accidental access of foreign matter, and to avoid loss of the fibrous material.
To this end, we arrange one or more vessels or "potchers" in which the esparto,
wood or other fibrous material is firstly broken up and reduced to "half-stuff,"
and which is or are in connection with one or more or with the first or first and
second of a series of vertically arranged bleaching towers, by means of a circulator
(preferably of the kind for which Letters-Patent No. 13709 of 1894 were granted
to James Taylor,) and of a pipe descending from the potcher to the circulator
and of another pipe ascending from the circulator to the mouth of the bleaching
tower, into which the half-stuff, when sufficiently treated in the potcher, can
be elevated by the circulator. The bleaching tower, or each thereof, is preferably
cylindrical in sectional plan and of a considerable height, and is formed with a
conical bottom which connects with another circulator (preferably of the like
kind to that aforesaid,) and which, by an ascending pipe, leads to the mouth of
a second bleaching tower similarly adapted, and which, in like manner, may
connect with a third bleaching tower, and so on for any required number thereof,
the ascending outlet pipe leading from each circulator being so adapted as to bo
capable of being turned either over the mouth of its own tower or over that of
the next adjacent one so that the materials may be repeatedly treated in each
such tower until sufficiently treated, or may be continuously circulated from one
to the next adjacent tower. Within and adjacent to the mouth of each bleaching
tower is arranged a conical deflecting plate supported by brackets secured to
the tower walls, and which serves to deflect the pulp, as it descends from its
overhead inlet pipe onto its apex, and to spread the same evenly over its surface
and towards the tower sides, and thereby ensures a thorough and more efficient
aeration of the pulp and a thorough and more even and quicker bleaching
thereof. From the last of the series of bleaching towers, the pulp, when
sufficiently treated therein, is delivered by a like arrangement of circulator and
connecting pipes to a washing engine wherein it is subjected to a further potching
treatment, and from which, by a like arrangement of circulator and connecting
pipes leading to a main, it is led directly to one or a series of beating engines
wherein it is finally reduced to fine pulp, and from which, when sufficiently
treated, it is discharged into the stuff chests at the paper-making machine. The
pipes connecting the various parts of the apparatus are adapted with suitable
cocks for regulating the supply of pulp passing therethrough.

page_text: The aforesaid improved arrangement of apparatus considerably economizes
labor, and the time employed in converting the raw material into pulp of the
required degree of fineness and in conveying it to the stuff chests at the paper
making machine, and enables the operation to be carried on continuously,
even though the parts of the apparatus should be situated at considerable distances
apart, and avoids the use of elevators sometimes used and wherein the pulp is
moved from part to part of the apparatus and is liable to become soiled.
DL1
1011
Tanamban 1900
DAY, DAVIES & HUNT,
Chartered Patent Agents, 321, High Holborn, London, W.C.,
Agents for the Applicants.
Improvements in Machinery or Apparatus for Making or Treating
Paper Pulp.
We, ANDREW MASSON and ROBERT SCOTT, both of York Place, New Wands-
worth, Surrey, Engineers, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
The object of this invention is to enable the treatment of esparto, wood and
other pulps, in the manufacture of paper, to be continuously carried out by
automatically operating means, so as, among other advantages, to avoid the
customary handling thereof between the successive operations to which it is
subject and the liability of its becoming soiled by carelessness in the handling
or the accidental access of foreign matter, and to avoid loss of the fibrous material.
On the accompanying drawings:
Figure 1, represents, in plan view, the arrangement of apparatus by which the
invention is carried out; while Fig. 2, represents the same in side elevation;
and Fig. 3, represents the same in end elevation, looking in the direction of
the arrow, l.
a, represents vessels or potchers in which the esparto, wood or other fibrous
material is firstly broken up and reduced to "half-stuff."
b, represents vertically arranged bleaching towers in which the half-stuff,
when sufficiently treated in the potchers, is thoroughly aerated and bleached.
c, represents a washing potcher in which the material as received from the
bleaching towers is washed or deprived of its bleaching liquid and subjected to
a further potching treatment.
And d, represents beating engines wherein the material is finally reduced to
fine pulp and from which, when sufficiently treated, it is discharged into the
stuff-chests at the paper making machine.
In carrying out the invention, one or more (say, two,) potchers, a, is or are
respectively connected with each of a series of the towers, b, by means of a
circulator, a¹, (preferably of the kind for which Letters-Patent No. 13709 of 1894
were granted to James Taylor,) and a pipe, a², connecting with a main, a³, pro-
vided with branches, a', which respectively depend into one of the towers, b.
Two-way cocks are fitted at a³, to enable the respective connections to be closed
or opened as may be required. By such means, the half-stuff, when sufficiently
treated in the potchers can be elevated from either potcher into any of the.
bleaching towers.
The bleaching towers, b, are each preferably cylindrical in plan and of a

page_text: considerable height and formed with a conical bottom, 61, and fitted with a cir-
culator,, (preferably of the like kind to that aforesaid,), a suitably supported
conical deflecting top plate, 63, and a pipe, b', leading from the circulator to
above the centre of the plate, 65, and the series of pipes, b, are connected to a
main, 67, leading to the washing potcher and tower, c, and are each fitted with
a two-way cock, at 66. Such means enable the materials to be repeatedly treated
in the respective towers, b, until sufficiently bleached and then to be led to the
washing tower and potcher, c, the plate, 6, of each tower serving to deflect tho
pulp as it is delivered by the pipe, b, onto its apex and to spread the same
evenly over its surface and towards the tower sides and thereby ensures a thorough
and more efficient aeration of the pulp and a more even and quicker bleaching
thereof.
The washing potcher, c, is mounted above a washing tower, c', of like form
to the bleaching towers, b, and which, in like manner to the towers, b, is fitted
with a circulator c, a conical deflecting top plate, &, and a pipe, c, which leads
from the circulator to above the centre of the plate, c³, and has a branch, c,
which leads to a main, 6, and a branch, c, which leads to the washing potcher, c,
and is fitted with stop cocks, at 8, to enable the respective connections to be
closed off or opened as required. Such means enable the materials to be subjected
to the washing treatment in the potcher, c, repeatedly and for as long as may be
required, the materials discharging from the potcher directly into its under towers,
and of their being then discharged from such tower through the main, c, which
is fitted with branches, e, into any one of the beating engines, d, two-way cocks
being fitted at 10, to enable the respective connections to be closed off or opened,
as may be required.
The aforesaid improved arrangement of apparatus considerably economizes
labor, and the time employed in converting the raw materials into pulp of the
required degree of fineness and in conveying it to the stuff chests at the paper
making machine, and enables the operation to be carried on continuously,
even though the parts of the apparatus should be situated at considerable distances
apart, and avoids the use of elevators sometimes used and wherein the pulp is
moved from part to part of the apparatus and is liable to become soiled.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
1
In combination, the herein described arrangement of potcher or potchers, a,
bleaching towers, b, washing potcher c, beating engines d, and means of circula-
ting the pulp from the potcher, a, or either of the potchers, a, to anyone of
bleaching towers, repeatedly through the latter if required, and therefrom to
the washing potcher, repeatedly through the latter if required, and therefrom
to anyone of the beating engines.
DAY, DAVIES & HUNT,
Chartered Patent Agents, 321, High Holborn, Loudon, W.C.,
Agents for the Applicants.