IMPROVED METHOD OF TREATING WOOD AND OTHER SIMILAR FIBROUS SUBSTANCES FOR THE MANUFACTURE OF HALF-STUFF AND PAPER
Year: 1870

page_text: LETTERS PATENT to Thomas Wrigley, of Bury, in the County of
Lancaster, Henry Bruce, of Kinleith, near Edinburgh, Paper Makers,
and Carl Dietrich Julius Seitz, of Edinburgh, Consulting Chemist,
for the Invention of "IMPROVED METHOD OF TREATING WOOD AND OTHER
SIMILAR FIBROUS SUBSTANCES FOR THE MANUFACTURE OF HALF-STUFF AND
PAPER."
Sealed the 26th May 1871, and dated the 1st December 1870.
PROVISIONAL SPECIFICATION left by the said Thomas Wrigley, Henry
Bruce, and Carl Dietrich Julius Seitz at the Office of the Com-
missioners of Patents, with their Petition, on the 1st December
1870.
We, TпоыAS WRIGLEY, of Bury, in the County of Lancaster, HENRY
BRUCE, of Kinleith, near Edinburgh, Paper Makers, and CARL DIETRICH
JULIUS SEITZ, of Edinburgh, Consulting Chemist, do hereby declare the
nature of the said Invention for "IMPROVED METHOD OF TREATING WOOD

page_text: AND OTHER SIMILAR FIBROUS SUBSTANCES FOR THE MANUFACTURE OF HALF-STUFF
AND PAPER," to be as follows:-
Our Invention relates to the treatment of wood and other similar
fibrous substances or materials in a novel manner so as to render it or
them suitable alone or in combination for the manufacture of paper and
what is known in the paper trade as half-stuff.
It consists in enclosing the wood or other substance in a solid or a
disintegrated state in a suitably shaped vessel, and then exhausting the
air therefrom by means of an air pump or other apparatus for producing
a vacuum therein. A caustic soda lye is then admitted into the same
vessel, preferably under pressure, hydraulic or otherwise, and is imbibed
by the substance or substances through its or their pores until the whole
of it is completely saturated and impregnated with the caustic soda
lye. The vessel with the impregnated substance is then to be submitted
to the action of steam or heat in any suitable manner and at any suitable
pressure, the liquid having been left in the vessel or having been run off.
The boiled or steamed substance can then be removed for the manufacture
of half-stuff or paper.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Wrigley, Henry Bruce, and Carl Dietrich
Julius Seitz in the Great Seal Patent Office on the 27th May 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, THOMAS
WRIGLEY, of Bury, in the County of Lancaster, HENRY BRUCE, of
Kinleith, near Edinburgh, Paper Makers, and CARL DIETRICH JULIUS
SEITZ, of Edinburgh, Consulting Chemist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the First day of December, in the year of
our Lord One thousand eight hundred and seventy, in the thirty-fourth
year of Her reign, did for Herself, Her heirs and successors, give and
grant unto us, the said Thomas Wrigley, Henry Bruce, and Carl
Dietrich Julius Seitz, Her special licence that we, the said Thomas
Wrigley, Henry Bruce, and Carl Dietrich Julius Seitz, our executors,
administrators, and assigns, or such others as we, the said Thomas
Wrigley, Henry Bruce, and Carl Dietrich Julius Seitz, our executors,
administrators, and assigns, should at any time agree with, and no

page_text: 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 "IMPROVED METHOD
OF TREATING WOOD AND OTHER SIMILAR FIBROUS SUBSTANCES FOR THE MANUFACTURE
OF HALF-STUFF AND PAPER," upon the condition (amongst others) that we,
the said Thomas Wrigley, Henry Bruce, and Carl Dietrich Julius Seitz,
or one of us, our executors, or administrators, by an instrument in
writing under, or one of our 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 we, the said Thomas Wrigley, Henry Bruce,
and Carl Dietrich Julius Seitz, 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
thereof, that is to say :-
Our Invention relates to the treatment of wood and other similar fibrous
substances or materials in a novel manner so as to render it or them
suitable alone or in combination for the manufacture of paper and what
is known in the paper trade as half-stuff.
It consists in enclosing the wood or other substance in a solid or
disintegrated state in a stationary kier or boiler, and then exhausting the
air therefrom by means of an air pump or other apparatus for producing
a vacuum therein. A. caustic soda lye is then run into the kier under
atmospheric pressure, and is imbibed by the substance or substances
through its or their pores until the whole of it is completely saturated
and impregnated with the caustic soda lye. The kier with the impregnated
substances is then to be submitted to the action of heat from a fire direct
or from the admission of steam in a superheated state either into the
kier itself or into a space left between the kier and an inner lining, the
boiling being continued as long as necessary for the substance under
treatment. The boiled or steamed substances can then be removed for
the manufacture of half-stuff and paper.
And having now described the nature of our Invention, and in
what manner the same is to be performed, we declare the we claim,
impregnating and boiling or steaming wood and other similar fibrous
66

page_text: substances with caustic soda lyes in stationary kiers or boilers in which
a vacuum or partial vacuum has been produced.
In witness whereof, I, the said Carl Dietrich Julius Seitz, for my-
self and on behalf of the said Thomas Wrigley and Henry Bruce,
have hereunto set my hand and seal, this Twenty-sixth day of
May One thousand eight hundred and seventy-one.