A Separator for Removing any Matter in Suspension in the Back- water from a Paper Making Machine.
Year: 1898

page_text: Date of Application, 6th Jan., 1898
Complete Specification Left, 2nd July, 1898-Accepted, 20th Aug., 1898
A Separator for Removing any Matter in Suspension in the Back-
water from a Paper Making Machine.
I, GORDON MCNEILL, Balerno Bank Paper Mills, Balerno, in the County of
Midlothian, North Britain Foreman, do hereby declare the nature of this invention
to be as follows:-
This invention has for its object the supplying of a simple and efficient means for
precipitating any matter that may be in suspension in the back water from a paper
making machine.
It consists of a box which may be either square oblong, round or oval, but prefer-
ably oblong in shape, of any convenient size say 8 feet broad by 10 feet long
and 2 feet deep at its shallowest part and 6 feet 6" at its deepest.
The box may have 8 divisions 12" apart running alternately from the right
side to the left side and from the left side to the right side. These divisions are
of the same depth as the box and 7 feet long which would leave the same distance
between the ends of the divisions and the side of the box as the space from one
division to another. These divisions form a continuous channel through the
whole box.
The bottom of the channel is sloped. With a box of the above dimensions there
would be 6" of slope on the bottom of the channel for every 8 feet long, that is
from one side of the box to the other. The back water enters the box at its
shallowest part and overflows at the extreme end of the channel where it is deepest
and farthest away from the inlet. This box will be called the separator where any
further reference is made to it in this specification.
In fixing the separator it is raised high enough so that the whole of its contents
can be run into the beaters.
The most simple and cheapest mode of working this separator is to raise the
machine back water service box so that whatever back water is not required for the
paper-making machine may overflow from the service box into the separator at
the shallowest end of the channel and flows down the sloped bottom until the
deepest part is reached and the separator then fills up. While filling up the
starch, fine fibre and loading in suspension in the back water falls to the bottom.
When the separator is full the back water flows through the whole length of this
channel which in this case is about 68 feet long-before it overflows-by which time
it is practically clear. If it was found that one was not enough another could be
added, the overflow from the first could be led to the second.
At the lowest part of the separator a pipe is fixed and carried to the beaters and
the contents of the separator used for furnishing and emptying the beaters with
instead of spring water.
The capacity of the pipe is large enough to empty the separator while a beater is
being furnished and emptied.
When the valve at the heaters is opened and the separator emptying, the supply

page_text: from the machine is still running in and as it falls into the separator at its
shallowest part it rushes down the sloped bottom, through the whole length of the
channel carrying all the deposit with it and washes the whole bottom thoroughly out
into the beater and as a beater is emptied about every 45 minutes the separator is
cleaned out about 24 times a day.
If two separators were at work to one machine they could both be connected to
the beaters and drawn from alternately but the better way would be to throw out
the ordinary back water service box for the machine and put a separator in its place
and overflow from it to the separator connected with the beaters. In this way the
overflow from number 2 separator would be perfectly clear.
The advantages of the above system are
A gain of about 1.5% of paper.
The paper made is a better colour.
The effluent to the river is quite clear.
A much less quantity of spring water is needed.
Cheapness needing no attendant nor extra pumping.
Its absolute cleanness.
Its durability and simplicity.
The small space required, as the back water is made to travel the utmost distance
in the space occupied by the separator.
JOHNSONS,
Petitioner's Agents, 115, St. Vincent Street, Glasgow.
A Separator for Removing any Matter in Suspension in the Back-
water from a Paper Making Machine.
I, GORDON MCNEILL, Balerno Bank Paper Mills, Balerno, in the County of
Midlothian, North Britain, Foreman, do hereby declare the nature of this invention,
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This invention has for its object the supplying of simple and efficient means for
precipitating any matter that may be in suspension in the back water from a paper
making machine.
It consists of a box which may be either square, oblong, round or oval, but prefer-
ably oblong in shape, of any convenient size say 8 feet broad by 10 feet long
and 2 feet deep at its shallowest part and 6 feet 6" at its deepest.
The box may have 8 divisions 12" apart, or whatever distance is found most
suitable, running alternately from its right side to the left side and from the
left side to the right side. These divisions are of the same depth as the box and
7 feet long which would leave the same distance between the ends of the divisions
and the side of the box as the space from one division to another. These divisions
form a continuous channel through the whole box.
The bottom of the channel is sloped. With a box of the above dimensions there
would be 6" of slope on the bottom of the channel for every 8 feet, that is
from one side of the box to the other. The back water enters the box at its
shallowest part and overflows at the extreme end of the channel where it is deepest
and furthest away from the inlet. This box will be called the separator where any
further reference is made to it in this specification.
In fixing the separator it is raised high enough so that the whole of its contents
can be run into the beaters.

page_text: The most simple and cheapest mode of working this separator is to raise the
machine back water service box so that whatever back water is not required for the
paper-making machine may overflow from the service box into the separator at
the shallowest end of the channel and flow down the sloped bottom until the
deepest part is reached and the separator then filled up. While filling up, the
starch; fine fibre and loading in suspension in the back water falls to the bottom.
When the separator is full the back water flows through the whole length of this
channel which in this case is about 68 feet long--before it overflows-by which time
it is practically clear. If it was found that one was not enough another could be
added, the overflow from the first being led to the second.
If two separators were at work to one machine they could both be connected to
the beaters and drawn from alternately but the better way would be to throw out
the ordinary back water service box for the machine and put a separator in its place
and overflow from it to the separator connected with the beaters. In this way the
overflow from number 2 separator would be perfectly clear.
In the accompanying sheet of drawings which I have appended for explaining
my invention, the latter form is illustrated.
Fig. I is an elevation, shewing the separator in position relatively with the
paper making machinery.
Fig. II is a plan and
Fig. III a cross section of the separator itself.
In the said drawings A represents the first separator, which is provided with
divisions Barranged equidistantly from each other and alternately, the said divisions
thus forming a continuous channel through which the water flows. The bottom
of this channel is sloped up first from the side a and then from the other side a¹ as
shewn more particularly in Fig. III. The size water is forced by the pump C
through the pipe c into the separator at the side of the box so that it flows into the
shallowest end of the channel. The water then fills the separator until it overflows
at D into the shallowest end of the channel in the second separator E which is
constructed in a similar manner to the first and may be of the same, or of a larger
or smaller size as desired. When the separator is full of water, which is now
very clear, it overflows at the deepest end of the channel by the pipe e to the drain.
At the bottom of the lowest part of the separator is fixed a pipe F leading to
the beater G so that the contents of the separator may be used for furnishing and
emptying the said beaters with instead of spring water, that is to say I employ
the said contents for reducing the consistency of the pulp when put into the beater
and for further reducing it when emptied out from the beater to the machine
chests.
The capacity of the pipe F is large enough to empty the separator while a beater
is being furnished and emptied. When the valve at the beaters is opened, and the
separator emptying, the supply from the machine is still running in and as it falls
into the separator at its shallowest part rushes down the sloped bottom, through
the whole length of the channel carrying all the deposit with it and washing the whole
bottom thoroughly out into the beater, and as a beater is emptied about every
45 minutes the separator is cleaned out about 24 times a day.
His the pipe leading the size water from the separator A which is substituted
for the ordinary machine service box, to the mixing box h.
The advantages of the above system are
A gain of about 1.5% of paper.
The paper made is a better colour.
The effluent to the river is quite clear.
A much less quantity of spring water is needed.
Cheapness needing no attendant nor extra pumping.
Its absolute cleanness.
Its durability and simplicity.
The small space required, as the back water is made to travel the utmost distance
in the space occupied by the separator.

page_text: 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 arrangement, construction and mode of action of the separator for remov-
ing any matter in suspension in the backwater from a paper making machine,
substantially as herein before described and shewn in the accompanying drawings.
2. Constructing the separator with divisions arranged alternately to and equi-
distantly from each other and having their bottom edges tapered, so as to form a
continuous channel sloping from side to side and increasing in depth from the one
end to the other, substantially as hereinbefore described and shewn in the
accompanying drawings.
Datad
1000
JOHNSONS,
Applicant's Agents, 115, St. Vincent Street, Glasgow.