USING AND EMPLOYING DEXTRINE IN THE MAKING AND SIZING OF PAPER
Year: 1857

page_text: LETTERS PATENT to William Ashby Rooke, of New Brentford, in the
County of Middlesex, for the Invention of "USING AND EMPLOYING
DEXTRINE IN THE MAKING AND SIZING OF PAPER."
Sealed the 6th April 1858, and dated the 15th October 1857.
PROVISIONAL SPECIFICATION left by the said William Ashby Rooke at
the Office of the Commissioners of Patents, with his Petition, on
.the 15th October 1857.
I, WILLIAM ASHBY ROOKE, of New Brentford, in the County of Middlesex,
do hereby declare the nature of thé said Invention for "USING AND EMPLOYING
DEXTRINE IN THE MAKING AND SIZING OF PAPER," to be as follows:―
I take dextrine, which I find to be a good vegetable sizing for papers, and
for making and sizing paper; whether thick or thin, at one operation. I mix
the dextrine or vegetable sizing either while dry or in solution, and in all.
proportions; according to the paper I desire to make with the paper pulp,
while in the engine, vat, cistern, or other vessel containing the paper pulp
prepared for making either water leaf or paper; or I add the dextrine or
vegetable sizing dry or in solution to the bath or trough, in which the water
leaf, made by such engine or in such vat or other vessel, is passed for sizing
by any of the present methods; and I use the said dextrine or vegetable
sizing, whether alone or mixed with other materials now used for sizing,
animal, vegetable, or mineral, at any temperature. For the paper or water.

page_text: leaf made by machine, and known as machine made, now usually sized by
passing through a trough or vessel containing animal sizing.
I claim as my Invention the use of the, or the addition of, dextrine as a
vegetable sizing, whether used cold or warm, dry or in solution, and at any
temperature, in all cases where the proportion of the vegetable sizing or
dextrine is in the proportion of three-fifths or more of the vegetable sizing or
dextrine to two-fifths or less of the solution of the animal sizing used in
that paper.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Ashby Rooke in the Great Seal Patent Office on the
14th April 1858,
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ASHBY ROOKE, of New Brentford, in the County of Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fifteenth day of October, in the year of our Lord
One thousand eight hundred and fifty-eight, in the twenty-first year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said William Ashby Rooke, Her special licence that I, the said William
Ashby Rooke, my executors, administrators, and assigns, or such others as I,
the said William Ashby Rooke, 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
"USING AND EMPLOYING DEXTRINE IN THE MAKING AND SIZING OF PAPER," upon
the condition (amongst others). that I, the said William Ashby Rooke, my
executors. or administrators, by an 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 William Ashby Rooke, do hereby
declare the nature of my 'said Invention, and in what manner the same is
to, bé. performed; to be particularly described and ascertained in and by the s
following statement thereof (that is to say):

page_text: I convert farinaceous substances into dextrine, which I find to be a good
vegetable sizing for paper, and also very advantageous for making and sizing
paper, whether thick or thin, at one operation. For sizing paper I use the
said dextrine vegetable sizing, either alone or in combination with any other
materials, animal, vegetable, or mineral now used in sizing paper. For making
paper, I mix the dextrine vegetable sizing either in solution or in a dry state,
and in all proportions, according to the paper I desire to make, with the paper
pulp while in the engine, vat, cistern, or other vessel containing the paper
pulp preparing for making either hand-made, or machine-made, or engine-made
paper, whether such pulp be sized or unsized; or I add the dextrine vegetable
sizing in any proportions in solution or in a dry state to the bath, cistern, or
other vessel in which unsized hand-made or engine-made papers are or may
be at present sized. I also add the dextrine vegetable sizing to the animal
or other prepared sizing in the cistern, vat, trough or troughs, in or by which
papers are now sized. I do not confine myself to any temperature or pro-
portions in the solutions of the dextrine vegetable sizing, whether used alone
or in combination with any other sizing materials, as the temperature and
proportions vary with the qualities or bodies of the paper required to be made
or sized.
I claim as my Invention the use and employment of dextrine as a vegetable
sizing in the making and sizing of paper in all papers, except in sizing
machine-made papers, where the dextrine vegetable sizing therein has a less
proportion than three-fifths by weight of dextrine vegetable sizing to two-fifths
by weight of animal sizing, or where the weight of the dextrine vegetable
sizing in machine-made paper exceeds by half the weight of the dry animal
sizing used or found therein.
In witness whereof, I, the said William Ashby Rooke, have hereunto
set my hand and seal, this Thirteenth day of April, in the year of our
Lord One thousand eight hundred and fifty-eight.
WILLIAM ASHBY ROOKE.
(L.S.)