INDRAVEMENTO TOM MANURACTURE OF PADER"
Year: 1863

page_text: LETTERS PATENT to John Duckworth, of Pilkington, near Manchester,
in the County of Lancaster, Size Manufacturer, for the Invention of
"INDRAVEMENTO TOM MANURACTURE OF PADER"
PROVISIONAL SPECIFICATION left by the said John Duckworth at the
Office of the Commissioners of Patents, with his Petition, on the 11th
February 1863.
I, JOHN DUCKWORTH, of Pilkington, near Manchester, in the County of Lan-
caster, Size Manufacturer, do hereby declare the nature of the said Inven-
tion for "IMPROVEMENTS IN THE MANUFACTURE OF PAPER," to be as follows:-
This Invention consists in mixing with the fibrous pulp commonly used in
paper-making a suitable proportion of a grey or slate-coloured mineral found
principally in the coal mines of Lancashire and other parts of Great Britain, gene-
rally covering the seams of coal. The said mineral is principally composed of
alumina, common clay, and shale, and is ground or pulped in any suitable
manner. By this admixture the paper is made cheaper, of finer quality, and
more susceptible of glaze than by the ordinary modes employed, and also form
various shades of color without the aid of other coloring matters. When.
necessary the aforesaid material may be bleached, and also colored or dyed.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Duckworth in the Great Seal Patent Office on the
11th August 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
DUCKWORTH, of Pilkington, near Manchester, in the County of Lancaster, Size
Manufacturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eleventh day of February, in the year of our Lord
One thousand eight hundred and sixty-three, in the twenty-sixth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said John Duckworth, Her special license, that I, the said John Duck-
worth, my executors, administrators, and assigns, or such others as I, the
said John Duckworth, my executors, administrators, and assigns, should at
any time agree with, and no others, from time to time and at all times there-
after 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 "IMPROVE-
MENTS IN THE MANUFACTURE OF PAPER," upon the condition (amongst others)
that I, the said John Duckworth, my executors or administrators, by au
instrument 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 immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said John Duckworth, 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 (that is to say):
:-
This Invention consists in mixing with the fibrous pulp commonly used in
paper-making a suitable proportion of a grey or slate-colored mineral found
principally in the coal mines of Lancashire and other parts of Great Britain,
generally covering the seams of coal. The said mineral is principally com-
posed of alumina, common clay, and shale, and is ground or pulped in any
suitable manner. By this admixture the paper is made cheaper, of finer
quality, and more susceptible of glaze than by the ordinary modes employed,
and also forms various shades of color without the aid of other coloring
matters. When necessary the aforesaid material may be bleached, and also
colored or dyed.

page_text: Having now described my Invention, I desire it to be understood that I
claim the mixture or amalgamation of the mineral substance generally known
by the name of "doughing," being a mineral found covering the seams of
certain mines of coal, with the fibrous pulp or half stuff used in the manu-
facture of paper, the said mixture or amalgamation to be used in any suitable
proportion according to the quality of paper required.
In witness whereof, I, the said John Duckworth, have hereunto set my
hand and seal, this Seventh day of August, in the year of our Lord
One thousand eight hundred and sixty-three.
Signed, sealed, and delivered by the
within-named John Duckworth,
in the presence of
G. SEPTIMUS HUGHES,
20, Cross Street,
Manchester.
JOHN DUCKWORTH. (L.S.)