IMPROVEMENTS IN THE MANUFACTURE OF PAPER PULP
Year: 1871

page_text: LETTERS PATENT to Robert Miller, Merchant, of Glasgow, in the
County of Lanark, North Britain, and John Miller, of the Carron
Paper Works, Denny, in the County of Stirling, North Britain, for
the Invention of "IMPROVEMENTS IN THE MANUFACTURE OF PAPER PULP."
Sealed the 24th October 1871, and dated the 29th April 1871.
PROVISIONAL SPECIFICATION left by the said Robert Miller and John
Miller at the Office of the Commissioners of Patents, with their
Petition, on the 29th April 1871.
We, ROBERT MILLER, Merchant, of Glasgow, in the County of
Lanark, North Britain, and JOHN MILLER, of the Carron Paper Works,
Denny, in the County of Stirling, North Britain, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN THE MANUFACTURE OF
PAPER PULP," to be as follows:-
This Invention relates in part to the application for making paper
pulp of abundant and cheap materials not hitherto used for that pur-
pose, and in part to improved processes for preparing or treating the.

page_text: said materials, and which are also applicable to other materials for
making paper pulp.
The Invention consists in making paper pulp from the root, stem,
branches, leaves, and emptied bolls or pods of the cotton plant; also
from what are known as "cotton siftings," and are obtained in the
primary processes of cleaning cotton.
The materials having been cleaned, if necessary, by apparatus such
as is used for cleaning rags, waste, esparto grass, and other paper
materials are boiled, by preference, under a pressure of about seven
pounds per square inch above the atmosphere in a solution of caustic
soda with about seventeen pounds of soda to every hundredweight of
material. This operation is to be conducted in either a revolving or
stationary-boiler_of_any_convenient well-known kind, but instead of
transferring the materials from such boiler to other-apparatus for sub-
sequent operations, as is ordinarily practised, they are retained therein
whilst being washed. The washing is, by-preference, effected by passing
the water through the boiler under pressure, and with the aid of heat
conveniently applied by injecting steam.
-
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Robert Miller and John Miller in the Great Scal
Patent Office on the 26th October 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, ROBERT
MILLER, Merchant, of Glasgow, in the County of Lanark, North Britain,
and JOHN MILLER, of the Carron Paper Works, Denny, in the County
of Stirling, North Britain, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-ninth day of April, in the year
of our Lord One thousand eight hundred and seventy-one, in the thirty-
fourth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said Robert Miller and John Miller, Her
special licence that we, the said Robert Miller and John. Miller, our
executors, administrators, and assigns, or such others as we, the said
Robert Miller and John Miller, our executors, administrators, and
assigns, should at any time agree with and no others, from time to
time and at all times thereafter during the -term therein expressed,
.

page_text: •
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN THE MANUFACTURE OF
PAPER PULP," upon the condition (amongst others) that we, the said
Robert Miller and John Miller, our executors or administrators, by an
instrument in writing under our, or their, or one of their hands and
scals, should particularly describe and ascertain the nature of the said
Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that we, the said Robert Miller and John Miller,
do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and
ascertained in and by the following statement in writing, that is to
say:
Our said Invention relates to the application for making paper pulp
of abundant and cheap materials not hitherto used for that purpose.
Our Provisional Specification lodged on applying for the hercin-before
in part recited Letters Patent also described certain processes intended
to be used by us as improved, and as applicable also with other materials,
we do not however consider such processes so novel or so valuable in
themselves as to warrant our claiming them as part of the Invention
secured to us.
Our said Invention consists in making paper pulp from the root, stem,
branches, leaves, and emptied bolls or pods of the cotton plant; also
from what are known as "cotton siftings," and are obtained in the
primary processes of cleaning the freshly gathered cotton.
In practising our said Invention we clean the materials, if necessary,
by apparatus, such as is used for cleaning rags, waste, esparto straw,
and other paper materials, and then boil them, by preference, under a
pressure of about seven pounds per square inch above the atmosphere
in a solution of caustic soda with about seventeen pounds of soda to
every hundredweight of material. This operation is to be conducted
in either a revolving or stationary boiler of any convenient well known
kind, and the materials may either be transferred from such boiler to
other apparatus for subsequent operations as is ordinarily practised, or
as we prefer they are retained therein whilst being washed, the washing

page_text: being by preference effected by passing the water through the boiler
under pressure and with the aid of heat, conveniently applied by injecting
steam.
The materials are subsequently reduced to pulp in the ordinary way,
and the pulp may be used by itself or mixed with other paper-making 5
materials.
Having thus particularly described our said Invention and the manner
in which the same is to be performed, we have to state that we do
not restrict ourselves to the precise details herein-before described, but
that what we believe to be novel and original and claim as the Invention 1
secured to us by the hercin-before in part recited Letters Patent is,
the employing of the root, stem, branches, leaves, and emptied bolls or
_pods_of_the_cotton plant-and. “_cotton siftings as materials for the
"