IMPROVEMENTS IN THE MANUFACTURE OF PROVISIONALFICATION
Year: 1880

page_text: LETTERS PATENT to Robert Charles Menzies, of Musselburgh, in the County
of Edinburgh, Paper Maker, and Edward John Bevan, of the same Place,
Chemist, for an Invention of "IMPROVEMENTS IN THE MANUFACTURE OF
PROVISIONAL SPECIFICATION left by the said Robert Charles Menzies &
Edward John Bevan at the Office of the Commissioners of Patents on the
19th May 1880.
ROBERT CHARLES MENZIES, of Musselburgh, in the County of Edinburgh, Paper
Maker, and EDWARD JOHN BEVAN, of the same Place, Chemist. "IMPROVEMENTS
IN THE MANUFACTURE OF PAPER FOR CHEQUES AND LIKE DOCUMENTS."
The object of our Invention is to provide paper for cheques, monetary and other
valuable documents, so prepared or manufactured that detection of falsification is
rendered easy, the alteration of any written or printed matter thereon by the acids,
bleach liquor, or alkalies usually employed at once giving a distinct stain.
For this purpose we add to the paper at any convenient stage in the manufacture
a mixture of iodide and iodate of potassium, starch, and carbonate or sulphate of
manganese, and carbonate or sulphate of lead. The proportions of these agents may
be varied, but we have found the following to answer well:—
in finished paper.
Potassium iodide
do. iodate
Starch
Sulphate or carbonate of manganese
Carbonate or sulphate of lead
-
-
75%
75%
1.0%
"
-
"
-
2. 0%
2.0%
-
دو
"
-
Manufactured paper may be treated under our Invention as follows:-
The paper either in the web or in sheets may be dipped into a solution of the
above agents, or may be coated or soaked with the same by means of a brush.
The iodide and iodate of potassium are for the purposes above mentioned the
agents of greatest moment, and are of our Invention. They may be employed with
other substances than those above mentioned, for instance, gallic acid can be used
in place of sulphate or carbonate of manganese, and in combination with the agents
above mentioned without carbonate or sulphate of lead.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Robert Charles Menzies & Edward John Bevan in the Great Seal
Patent Office on the 18th November 1880.
ROBERT CHARLES MENZIES, of Musselburgh, in the County of Edinburgh, Paper
Maker, and EDWARD JOHN BEVAN, of the same Place, Chemist. IMPROVEMENTS
IN THE MANUFACTURE OF PAPER FOR CHEQUES AND LIKE DOCUMENTS."
The object of our Invention is to provide paper for cheques, monetary and other
valuable documents, so prepared or manufactured that detection of falsification is
rendered easy, the alteration of any written or printed matter thereon by the acids,
bleach liquor, or alkalies usually employed at once giving a distinct stain.
For this purpose we add to the paper at any convenient stage in the manufacture
a mixture of iodide and iodate of potassium, starch, and carbonate or sulphate of
manganese, and carbonate or sulphate of lead. The proportions of these agents
may be varied, but we have found the following to answer well:-
Potassium iodide
do. iodate
Starch
Sulphate or carbonate of manganese
Carbonate or sulphate of load
75% in finished paper.
-
.75%
1·0%
2.0%
2.0%
"
"
"
"2
Manufactured paper may be treated under our Invention as follows:
The paper either in the web or in sheets may be dipped into a solution of the
above agents, or may be coated or soaked with the same by means of a brush.
The iodide and iodate of potassium are for the purposes above mentioned the
agents of greatest moment, and are of our Invention. They may be employed
with other substances than those above mentioned, for instance, gallic acid can be
used in place of sulphate or carbonate of manganese, and in combination with the
agents above mentioned without carbonate or sulphate of lead.
Having now set forth the nature and particulars of our Invention in such
manner that others will be enabled to carry the same into practice, we claim,-
First. Adding iodide and iodate of potassium to paper, substantially for the
purpose herein set forth.
Second. Adding iodide and iodate of potassium with, the other agents herein
mentioned, or their equivalents to paper, substantially for the purpose herein set
forth.
In witness whereof, we, the said Robert Charles Menzies and Edward John
Bevan, have hereunto sct our hands and seals, the Seventeenth day of
November, in the year of our Lord One thousand eight hundred and
cighty.
ROBERT CHARLES MENZIES. (L.S.)
EDWARD JOHN BEVAN.
(L.S.)