IMPROVEMENTS IN APPARATUS FOR STRAINING PULP, USED IN THE MANUFACTURE OF PAPER
Year: 1884

page_text: I RICHARD COOPER of Over Darwen in the County of Lancaster, Blacksmith, do
hereby declare the nature of my Invention for "IMPROVEMENTS IN APPARATUS FOR
STRAINING PULP, USED IN THE MANUFACTURE OF PAPER," to be as follows:-
My invention has reference to apparatus for the extraction and removal of solids
or other refuse from pulp used in the manufacture of paper, thus dispensing with
the stoppage of the machine through the stop or regulator tap becoming choked
with pieces of rope, wood, or other similar substances.
By my improvements all substances which tend to choke or make up the nozzle
of the stop or regulator tap in the mixing box on the end of paper machine, or the
pipes leading to the same from agitator vat, are arrested and removed from the
pulp before passing into the aforesaid agitator vat, thus dispensing with any
stoppage of the machine from this cause, which prevents breaks being made in the
paper; causing a more even flow of pulp; giving a uniform thickness, as well as
producing a better class of paper.
I accomplish these improvements by placing on the delivery pipes from the pulp
pump to the agitator vats, a suitable vessel provided with a centre stand pipe,
having suitable holes through which the pulp has to pass into the outer vessel,
from whence it flows to the agitator vat prepared to receive it. The top of the
stand pipe being at a higher elevation than the level of the pulp in outer vessel
and the agitator vat, the solids or other refuse detrimental to the manufacture of
good paper are arrested in it, from which they can be removed by manual labor, or
by automatic means, in which case I place in the centre stand pipe a revolving
archimedian screw or other mechanical means, worked by any suitable gearing, by
which the arrested matter is lifted into a trough or vessel placed on the outside of
the central stand pipe, from whence it flows or falls down suitable troughs into a
receptacle prepared to receive it.
The outer pulp vessel is also provided with an overflow branch through which
the pulp flows in case the agitator vat is full or otherwise. The strained pulp falls
down the overflow pipe to the vat from which it was originally pumped, thus being
worked or pumped over again in a purer state.
Dated this fourth d...
T
1004A

page_text: I RICHARD COOPER of Over Darwen in the County of Lancaster, Blacksmith, do
hereby declare the nature of my Invention for "IMPROVEMENTS IN APPARATUS FOR
STRAINING PULP USED IN THE MANUFACTURE OF PAPER," and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :--
My invention has reference to apparatus for the extraction and removal of solids
or other refuse from pulp used in the manufacture of paper, thus dispensing with
the stoppage of the machine through the stop or regulator tap being choked with
pieces of rope, wood, or other similar substances.
By my improvements all substances which tend to choke or make up the nozzle
of the stop or regulator tap in the mixing box on the end of the paper machine, or,
the pipes leading to the same from agitator vat, are arrested and removed from the
pulp before passing into the aforesaid agitator vat, thus dispensing with. any
stoppage of the machine from this cause; giving a more-even flow of pulp with an
uniform thickness, which prevents breaks as well as producing a better class of
paper.
I accomplish these improvements by placing on the delivery pipes from the pulp
pump to the agitator vats, a suitable vessel provided with a centre stand pipe,
having suitable holes through which the pulp passes into the outer vessel, from
whence it flows to the agitator vat prepared to receive it. The top of the stand
pipe is extended above the level of the pulp in the outer vessel and agitator vat,
thus, confining or arresting the solids or other refuse detrimental to the manufacture
of good paper; from which they are removed periodically by manual labor, or
regularly by automatic means, in which case I place in the centre stand pipe a
revolving archimedian screw worked by suitable gearing. By means of this screw
the arrested matter is lifted from the stand pipe into a trough or vessel provided on
the outside of the said stand pipe, from whence it flows or falls down suitable¨
troughs into a receptacle prepared to receive it.
In order that my Invention may be fully understood and readily carried into
operation, I will proceed to describe the annexed sheet of drawings, reference being
made to the figures and letters marked thereon.
Fig. 1 is a sectional elevation of my improved apparatus for arresting solids or
other refuse from pulp, from which they are periodically removed by manual labor.
The pipe A is the delivery pipe from the pulp pump on which is fixed the
cistern B, provided with the outlet branch C, and the overflow branch D. Over
the delivery pipe A is fixed inside the cistern B the central stand pipe E, into
which the pulp is pumped in a liquid state from the pumps. The pulp rises and
falls with each stroke of the pump in the stand pipe E, during which it passes
through the holes or perforations H into the cistern B, leaving the solids or other
refuse detrimental to the paper in the stand pipe E. The strained pulp then flowB
through the outlet pipe C to the agitator vat, from whence it passes to the paper
machine in a pure state as required. The solids or other refuse collect in the
central stand pipe E in which they rise and fall with each stroke of the pump,
which, as they accumulate rise towards the top end. The air is forced each stroke
through the holes I until such times as they become covered with the accumulated
refuse, thus preventing the escape of the air which causes it to operate and lift the
hinged lid K; to this lid is attached the bell L by the spring L¹ which rings each
time the lid moves, thus indicating that the central pipe requires emptying.
In case the pulp is pumped in greater quantities than required by the paper
machine, causing the pulp to rise in the agitator vat above the outlet pipe C, the

page_text: same level will be maintained in the cistern B until the line M is attained, when
the pulp will flow down the overflow branch D to the vat from which it was
pumped. The line M indicates the maximum height of the liquid pulp in the
agitator vat leading to the paper machine.
Fig. 2 is a sectional elevation of my improved extractor supplied with the
archimedian screw N, for the purpose of regularly and automatically emptying the
solids or other refuse from the stand pipe E. The screw N is provided with the
centre P, which is held and supported in the bracket or fixing R, the latter being
carried from the trough or vessel S on the central stand pipe E, which is provided
to receive the solids or other refuse lifted by the screw N. The vessel S is provided
with a suitable shoot or outlet (not shewn), down which the solids or refuse slide
or fall to a vat or receptacle prepared to receive them.
The screw N is operated and driven by the bevel wheel T fixed on the centre P,
and is driven by the bevel wheel V, shaft W and pulley Z.
I do not confine myself to the driving gear shewn, as it may be performed in a
number of well-known ways by other equivalents.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed I declare that what"
I claim is
1. The construction and use of apparatus for arresting and extracting solids or
other refuse from pulp used in the manufacture of paper, for the purposes herein
described and as shewn on the drawings in Fig. 1.
2. The construction and use of apparatus for automatically emptying solids and
other refuse from the stand pipe E, substantially as described and as shewn on the
drawings in Fig. 2.
EDMUND CHADWICK,
Agent for the Applicant.