THE USE OR APPLICATION OF A CERTAIN SUBSTANCE OR SUBSTANCES IN THE MANUFACTURE, STIFFENING, OR SIZING OF PAPER
Year: 1858

page_text: LETTERS PÅTENT to Peter Alfred Mawdsley, of Seacombe, in the County
of Chester, Smalt Manufacturer, for the Invention of "THE USE OR
APPLICATION OF A CERTAIN SUBSTANCE OR SUBSTANCES IN THE MANUFACTURE,
STIFFENING, OR SIZING OF PAPER."
Sealed the 11th March 1859, and dated the 3rd November 1858.
PROVISIONAL SPECIFICATION left by the said Peter Alfred Mawdsley
at the Office of the Commissioners of Patents, with his Petition, on the
3rd November 1858.
I, PETER ALFRED MAWDSLEY, of Seacombe, in the County of Chester, Smalt
Manufacturer, do hereby declare the nature of the said Invention for "THE
USE OR APPLICATION OF A CERTAIN SUBSTANCE OR SUBSTANCES IN THE MANU
FACTURE, STIFFENING, OR SIZING OF PAPER," to be as follows:-
My Invention consists in using in the sizing of paper alkaline aluminates,
such as the aluminate of potash, or the aluminate of soda, either alone, or
separately, or in combination with other preparations generally used for
sizing paper; and such aluminates, either alone or separately, or mixed,
as above indicated, may be applied either to the pulp or to the paper itself.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Peter Alfred Mawdsley in the Great Seal Patent Office on
the 3rd May 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PETER
ALFRED MAWDSLEY, of Seacombe, in the County of Chester, Smalt Manu-
facturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Third day of November, in the year of our Lord One
thousand eight hundred and fifty-eight, in the twenty-second year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Peter Alfred Mawdsley, Her special licence that I, the said Peter Alfred
Mawdsley, my executors, administrators, and assigns, or such others as I, the
said Peter Alfred Mawdsley, my 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, 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 "THE
USE OR APPLICATION OF A CERTAIN SUBSTANCE OR SUBSTANCES IN THE MANUFACTURE,
STIFFENING, OR SIZING OF PAPER," upon the condition (amongst others) that I,
the said Peter Alfred Mawdsley, my executors or administrators, by an instru-
ment in writing under my, or their, or one of their hands and seals, 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 imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Peter Alfred Mawdsley, do hereby
declare the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement :-
My Invention consists in employing for the sizing of paper alkaline
substances, such as the aluminate of potash, and the aluminate of soda, either
seperately, or mixed, alone or in combination with other preparations used for
sizing paper. Such aluminates, either seperately or mixed, alone or in com-
bination, as already mentioned, may be applied either to the pulp or to the
paper itself.
The aluminates of soda and of potash may be prepared in a variety of ways,
the aluminate of soda, for instance, in the following manner:-Take equal
parts of alumina and any of the carbonates of soda, and fuse them together in

page_text: a reverberatory furnace until the materials are thoroughly incorporated by
fusion. The alumina, during the process of fusion, expels the carbonic acid
from the carbonate of soda, and the product left will be a white hard substance,
readily soluble in water. The aluminate of potash is prepared in a similar
manner, potash being substituted for soda. The aluminates are then dissolved
in either hot or cold water (I prefer to dissolve them in hot water), and after-
wards concentrated by evaporation to the requisite consistency.
Having now described the nature of my said Invention, and the manner in
which the same is or may be carried into effect, I wish it to be understood
that what I claim as the Invention to be secured to me by the herein-before
in part recited Letters Patent is, the use and application of alkaline
aluminates, such as the aluminates of potash and of soda, for the sizing of
paper, as herein-before described.
In witness whereof, I, the said Peter Alfred Mawdsley, have hereunto set
my hand and seal, this Second day of May, in the year of our Lord
One thousand eight hundred and fifty-nine.
P. A. MAWDSLEY. (L.S.)