IMPROVEMENTS IN THE MANUFACTURE OF PAPER STOCK
Year: 1872

page_text: LETTERS PATENT to Robert Irvine, of Baltic Street, Leith, North
Britain, Chemist, and James Mackintosh, of Buenos Ayres, in the
Argentine Republic, Merchant, for the Invention of "IMPROVEMENTS
IN THE MANUFACTURE OF PAPER STOCK.”
PROVISIONAL SPECIFICATION left by the said Robert Irvine and
James Mackintosh at the Office of the Commissioners of Patents,
with their Petition, on the 27th May 1872.
We, ROBERT IRVINE, of Baltic Street, Leith, North Britain, Chemist,
and JAMES MACKINTOSH, of Buenos Ayres, in the Argentine Republic,
Merchant, do hereby declare the nature of the said Invention for "Im-
PROVEMENTS IN THE MANUFACTURE OF PAPER STOCK," to be as follows:-
This Invention relates to the manufacture of paper stock from a grass
grown in large quantities in the Argentine Republic, and called by the

page_text: natives there inju. This material is firstly treated by boiling in open or
closed pans with a solution of caustic soda in sufficient quantity to
remove the resinous and gummy matter from the fibre, and the material
so treated is afterwards disintegrated by beating engines or otherwise,
and the soluble constituents are well washed from the pulp so formed.
The pulp is then bleached by means of chlorine or chloride of lime when
a stock for white paper is desired, or the stock may be used without
previously undergoing a bleaching process when strong colored papers,
such as ordinary brown papers, are required. The stock thus produced
will be found to be suitable for subsequent manufacture into papers.
papier maché, or of any class of pasteboard or carton pierre desired.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Robert Irvine and James Mackintosh in the
Great Seal Patent Office on the 22nd November 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, ROBERT
IRVINE, of Baltic Street, Leith, North Britain, Chemist, and JAMES
MACINTOSH, of Buenos Ayres, in the Argentine Republic, Merchant,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-seventh day of May, in the year
of our Lord One thousand eight hundred and seventy-two, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said Robert Irvine and James Macintosh,
Her special license that we, the said Robert Irvine and James
Mackintosh, our executors, administrators, and assigns, or such others
as we, the said Robert Irvine and James Macintosh, our executors,
administrators, or 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 THE MANU-
FACTURE OF PAPER STOCK," upon the condition (amongst others) that
we, the said Robert Irvine and James Macintosh, our executors or

page_text: administrators, by an instrument in writing under our hands and
seals, or under the hand and seal of one of us, 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 Robert Irvine and James Mac-
intosh, 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, that is to say :-
This Invention relates to the manufacture of paper stock from a grass
or grasses growing naturally in large quantities in the Argentine and
Banda, Oriental or Uruguay Republics of South America, or such
countries lying between thirty degrees and fifty degrees south latitude of
that continent, and called by the name of "juju" or "paja" by the
natives there, and recognized by botanists as spartina. This material is
firstly treated by boiling in open or closed pans with a solution of caustic
soda in sufficient quantity to remove the silicious, resinous, and gummy
matter from the fibre, and the material so treated is aferwards disinte-
grated by beating engines or otherwise, and the soluble constituents are
well washed from the pulp so formed. The pulp is then bleached by
means of chlorine or chloride of lime when a stock for white paper is
desired (for the manufacture of paper), or the stock may be used without
previously undergoing a bleaching process when coloured or ordinary
brown papers are required. The stcok thus produced will be found to
be suitable for subsequent manufacture into papers, papier maché of
any class, pasteboard or carton pierre, as desired.
Having now described and particularly ascertained the nature of our
said Invention, and the manner in which the same is or may be used or
carried into effect, we would observe in conclusion that what we consider
to be novel and original and therefore claim as the Invention secured to
us by the herein-before in part recited Letters Patent is, the employ-
ment of "spartina" grass obtained from the Argentine and Banda,
Oriental or Uruguay Republics, and other countries between thirty
degrees and fifty degrees south latitude of South America, and known
there as "juju" or "paja," and recognized by botanists as "spartina "

page_text: after having been submitted to a process or processes of treatment sub-
stantially similar to that before mentioned, so as to render it suitable
for the manufacture of paper, papier maché, paste board, or carton
pierre.
In witness whereof, I, the said Robert Irvine, on behalf of myself 5
and the said James Macintosh, have to this our Specification
set my hand and seal, this Twenty-second day of November One
thousand eight hundred and seventy-two.
ROBERT IRVINE. (L.S.)