Year: 1896

page_text: Date of Application, 27th Oct., 1896
Complete Specification Left, 24th July, 1897-Accepted, 23rd Oct., 1897
We, JAMES WYLLIE, Papermaker, New Calder Paper Mills, Midcalder, Midlothian,
and THOMAS TEMPLETON MACKIE LUMSDEN, Engineer, Milton House Works,
Edinburgh, do hereby declare the nature of this invention to be as follows:-
This invention has reference to machines for the making of all kinds of paper and
is specially suitable for the manufacture of duplex and triplex paper and tissue
paper.
We apply to the upper couch roll of a paper-making machine a continuous felt,
which is carried back above the wire frame, and is led through between the press
rolls, after which it is passed through a tank filled with water, in which revolves one
or more paddles or beaters. Having been washed in this tank, the felt returns under
the necessary guiding rollers to the couch rolls. By this means the pulp does not
require to be lifted by hand from the couch rolls on to the wet felt, as at present,
bus by coming in contact with the felt above described, as they are together passed
through the couch rolls, it adheres to the under side of the felt, and travels with it
round the further side of the upper couch roll, and by this means is at once turned
upside down, and travels back in this reversed position till it passes through the press
rolls, and thence to the drying cylinders. In this way the mark caused by the wire
is removed by contact with the upper press roll before the paper has had time to
become too dry.
The sheet being transferred from the couch rolls to the felt without the necessity
of handling, this process is specially suitable for the manufacture of tissue and other
fragile papers.
Where duplex paper is to be made, the felt, instead of returning over the top of
the upper couch roll, is carried forward and passes between another couch roll and a
wire drum revolving in a vat containing pulp of the desired composition and colour.
By this means the sheet, which adheres to the under side of the felt, and travels with
it, receives on its under side, from the wire drum, a coating of the pulp contained
in the vat, and at the same time it is turned upside down by the return of the felt
over this last-mentioned couch roll, and is carried as before described to the
press rolls, where any mark received from the wire drum is removed. By this process
triplex paper can also be made, by employing a second wire frame or a second vat
and wire drum working in such alternation with the first wire frame and with the
first vat and wire drum above described as may be found suitable.
Apart from the manufacture of duplex or triplex paper the arrangement above
described for reversing the paper before it enters the press rolls can be readily
applied to any ordinary paper-making machine for the purpose of removing the wire
marks, and when this is used in combination with the felt-washing arrangement
above described the machine can be run continuously for long periods, instead of
requiring stoppage for cleaning several times a week.
Dated this Twenty-fourth day of October 1896.
JAMES WYLLIE.
THOS. T. M. LUMSDEN.

page_text: Improvements in the Construction of Paper Making Machines.
We, JAMES WYLLIE, Papermaker, New Calder Paper Mills, Midealder, Midlothian,
and THOMAS TEMPLETON MACKIE LUMSDEN, Engineer, Milton House Works,
Edinburgh, 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 reference to machines for the making of all kinds of paper and
is specially suitable for the manufacture of duplex and triplex paper and tissue
paper, and paper requiring to have both sides of the same degree of smoothness.
The invention is illustrated by the accompanying drawings, Figs. 1, 2 and 3 being
side elevations showing various modifications of Fourdrinier paper making machines
as constructed under our Invention.
In carrying out our Invention and referring particularly to Fig. 1, we apply to the
upper couch roll A of a paper making machine a continuous felt B which is carried
back above the wire frame C, and is led through between the press rolls D), after
which it is passed through a tank E containing water and provided with one or more
spray pipes and in which revolves one or more paddles, beaters or brushes F so
arranged as to thoroughly wash the felt. Having been washed in this tank, the
felt B returns under the necessary guiding rollers to the couch rolls A, A. By this
means the pulp does not require to be lifted by hand from the couch rolls A on to
the wet felt, as at present, but by coming in contact with the felt above described, as
they are together passed through the couch rolls, it adheres to the under side of the
felt, and travels with it round the further side of the upper couch roll A, and by this
means is at once turned upside down, and travels back as shown at Fig. 1 in this
reverse position until it passes through the press rolls D, and thence through the
other set or sets of press rolls D1, D2, and thence to the drying cylinders. In this
way the mark caused by the wire is removed by contact with the polished surface of
the upper press roll and before this side of the sheet of paper has been in contact
with the wet felt, while in a wet or pulpy state as is at present the custom on all
Fourdrinier Paper Machines. The under couch roll A¹ carrying the wire is either
grooved or perforated to allow the water in the paper to pass freely away and to
ensure that the paper will adhere to the felt.
As shown at Fig. 2 the felt instead of being carried around the upper couch roll,
is carried forward underneath and returns between the first pair of press rolls and
thence to the washing tank. The centre of the upper couch roll being in this
example carried forward over the centre of the lower couch roll in order to cause the
paper to adhere to the wet felt.
The sheet being transferred from the couch rolls A, A', to the felt without the
necessity of handling, this process is specially suitable for the manufacture of tissue
and other fragile papers.
Where duplex paper is to be made, the felt which in other respects is arranged as
already described with reference to Figs. 1 and 2, instead of returning over the top of
the upper couch roll A, is carried forward as shown at Fig. 3 and passes between
another couch roll G and a wire drum H, revolving in a vat I containing pulp of the
desired composition and colour. By this means the sheet, which adheres to the
under side of the felt B, and travels with it, receives on its under side, from the wire
drum H, a coating of the pulp contained in the vat I, and at the same time it is
turned upside down by the return of the felt B, over this last mentioned couch
roll G, and is carried as before described to the press rolls D, where any mark received
from the wire drum H is removed. By this process triplex paper can also be made,
by employing a second wire frame or wet end J or wire drum, working in such

page_text: alternation with the first wire frame C and with the vat I and wire drum H above
described as may be found suitable.
Apart from the manufacture of duplex or triplex paper the arrangement above
described for reversing the paper before it enters the press rolls can be readily applied
to any ordinary paper making machine for the purpose of removing the wire marks,
and when this is used in combination with the felt-washing arrangement above
described the machine can be run continuously for long periods, instead of requiring
stoppage for cleaning several times a week.
Having now particularly described and ascertained the nature of our said Inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. The combination with a Fourdrinier paper making machine of an endless felt
applied to the upper couch roll and arranged to reverse the paper before it enters the
press roll substantially as described.
2. A paper making machine constructed and furnished with an endless reversing
felt arranged to automatically lead the paper to the first press rolls substantially as
described with reference to Figure 1 of the annexed drawings.
3. A paper making machine constructed and furnished with an endless reversing
felt arranged to automatically lead the paper to the first press rolls substantially as
described with reference to Figure 2 of the annexed drawings.
4. A paper inaking machine constructed and furnished with an endless reversing
felt arranged to automatically lead the paper to the first press rolls substantially as
described with reference to Figure 3 of the annexed drawings.
Dated this 92nd day of Il 1907
WALLACE FAIRWEATHER,
Of the Firm of Cruikshank & Fairweather,
Chartered Patent Agents,
62, St. Vincent Street, Glasgow, Agent for the Applicants.