IM- PROVEMENTS IN REDUCING AND PREPARING WOOD FOR THE MANUFACTURE OF PAPER AND PULP
Year: 1863

page_text: LETTERS PATENT to William Wharton Burdon, of the Town and
County of Newcastle-upon-Tyne, Esquire, for the Invention of "IM-
PROVEMENTS IN REDUCING AND PREPARING WOOD FOR THE MANUFACTURE OF
PAPER AND PULP."
County of Newcastle-upon-Tyne, Esquire, for the Invention of "IM-
PROVEMENTS IN REDUCING AND PREPARING WOOD FOR THE MANUFACTURE OF
PAPER AND PULP."
Sealed the 19th April 1864, and dated the 22nd October 1863.
PROVISIONAL SPECIFICATION left by the said William Wharton Burdon
at the Office of the Commissioners of Patents, with his Petition, on the
22nd October 1863.
I, WILLIAM WHARTON BURDON, of the Town and County of Newcastle-
upon-Tyne, Esquire, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN REDUCING AND PREPARING WOOD FOR THE MANUFACTURE OF
PAPER AND PULP," to be as follows:-
I take wood reduced by any ordinary and well-known means to pieces of
such size as will enter between the faces of revolving stones. I introduce the
wood between revolving stones, together with a stream of water, a solution of
sulphuret of calcium or caustic potash, or caustic soda, or oil, or solution of
soft soap or other suitable liquid, kept running through between the stones, or
I introduce the wood dry. In some cases I use steel mills, conical or flat.
Where conical I cause the hollow and solid cones to be rifled in large or
small grooves, and when flat I cause the two surfaces to be channelled or
rifled, and I pass water or the above solutions at the same time as the wood
between the grinding surfaces. I next boil the fibre resulting from the

page_text: grinding, partially bleach it, and pass it through a paper maker's beater or
other similar machine, and expose it to the sun for some days.. I sprinkle it
with a solution of hyposulphite of soda and repeat the beating. The material
is then fit for the manufacture of paper and of pulp for other purposes.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Wharton Burdon in the Great Seal Patent Office
on the 22nd April 1864.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
WHARTON BURDON, of the Town and County of Newcastle-upon-Tyne, Esquire,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-second day of October, in the year of our Lord
One thousand eight hundred and sixty-three, in the twenty-seventh year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said William Wharton Burdon, Her special licence that I, the said William
Wharton Burdon, my executors, administrators, and assigns, or such others
as I, the said William Wharton Burdon, 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 "IMPROVEMENTS IN REDUCING AND PREPARING WOOD FOR THE MANUFACTURE
OF PAPER AND PULP," upon the condition (amongst others) that I, the said
William Wharton Burdon, 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 Inven-
tion, 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 Wharton Burdon, 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 thereof, that is to say:-
I take wood reduced by powerful cutters or by any ordinary and well-
known means to pieces of such size as will enter between the faces of revolving
stones. introduce the wood between revolving stones, together with a stream

page_text: Where conical I
of water, a solution of sulphuret of calcium or caustic potash or caustic soda,
or oil, or solution of soft soap or other suitable liquid, kept running through
between the stones, or I introduce the wood dry. In some cases I use mills
conical or flat with the grinding surfaces of steel or stone.
cause the hollow and solid cones to be rifled in large or small grooves, and
when flat I cause the two surfaces to be chamcelled or rifled, and I pass
water or the above solutions at the same time as the wood between the
grinding surfaces. I next boil the fibre resulting from the grinding, partially
bleach it, and pass it through a paper maker's beater or other similar machine
and expose it to the sun for some days. I sprinkle it with a solution of
hyposulphite of soda and repeat the beating. The material is then fit for the
manufacture of paper and of pulp for other purposes.
In witness whereof, I, the said William Wharton Burdon, have here-
unto set my hand and seal, this Twentieth day of April, One thousand
eight hundred and sixty-four.
W. W. BURDON. (L.S.)