IMPROVEMENTS IN THE MANUFACTURE OF FILTERING PAPER
Year: 1867

page_text: LETTERS PATENT to Ralph Robinson, of Rochdale, Chemist and
Druggist, for the Invention of "IMPROVEMENTS IN THE MANUFACTURE OF
FILTERING PAPER."
Sealed the 5th May 1868, and dated the 7th November 1867.
PROVISIONAL SPECIFICATION left by the said Ralph Robinson at the
Office of the Commissioners of Patents, with his Petition, on the
7th November 1867.
I, RALPH ROBINSON, of Rochdale, Chemist and Druggist, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN THE MANU
PACTURE OF FILTERING PAPER," to be as follows:-
This Invention has for its object improvements in the manufacture of
filtering paper..
As filtering paper is at present made it is very tender when in a wet state,
and inconvenience often arises from its breaking simply by the weight of the
liquid which is put upon it to be filtered.
Now according to my Invention I stregthen filtering paper by imbedding
in its substance in the process of manufacture threads or cords, which may
either be separate the one from the other or woven into a loose and open
fabric. It is not essential that the threads, or cords, or fabric should ba
entirely enclosed in the paper so long as a secure adhesion is obtained.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Ralph Robinson in the Great Seal Patent Office on the
5th May 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RALPH
ROBINSON, of Rochdale, Chemist and Druggist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventh day of November, in the year of our
Lord One thousand eight hundred and sixty-seven, in the thirty-first year
of Her reign, did, for Herself, Her heirs and successors, give and grant
runto me, the said Ralph Robinson, Her special licence, that I, the said Ralph
Robinson, my executors, administrators, and assigns, or such others as I, the
said Ralph Robinson, 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 THE
MANUFACTURE OF FILTERING PAPER," upon the condition (amongst others) that I,
the said Ralph Robinson, 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 Ralph Robinson, do hereby declare
the nature of the said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
:statement thereof, that is to say.:—
This Invention has for its object improvements in the manufacture of
filtering paper.
As filtering paper is at present made it is very tender when in a wet state,
and inconvenience often arises from its breaking simply by the weight of the
liquid which is put upon it to be filtered.
Now according to my Invention I strengthen filtering paper-by embedding
in its substance in the process-of manufacture threads or cords, which-may
either be separate the one from the other or woven or netted into a loose and
open fabric. It is not essential that the threads, or cords, or fabric should
be entirely enclosed in the paper so long as a secure adhesion is obtained.
In order to manufacture "filtering paper strengthened as above described I

page_text: by preference place threads of silk, cotton, linen, wool, or other fibrous
material on that part of the machine known in paper making as the wire, and
allowing the paper pulp to run on the wire in the usual way covering the
threads, and thereby imbedding them in the paper pulp; the paper pulp is
then deprived of its moisture and dried in the usual manner. The thread
material may either be netted or woven, or it might be in separate threads,
although I believe not so advantageously.
In witness whereof, I, the said Ralph Robinson, have hereunto set
my hand and seal, this First day of May, in the year of our Lord One
thousand eight hundred and sixty-eight.
RALPH ROBINSON. (L.s.)