IMPROVEMENTS IN COATING METALS TO BE USED FOR PRESERVING OR CARRYING SUBSTANCES THE PURITY OR QUALITY OF WHICH IS LLABLE TO BE AFFECTED BY CONTACT WITH THE METAL
Year: 1876

page_text: LETTERS PATENT to John Clark, of Glasgow, in the County of Lanark, North
Britain, for the Invention of "IMPROVEMENTS IN COATING METALS TO BE USED
FOR PRESERVING OR CARRYING SUBSTANCES THE PURITY OR QUALITY OF WHICH
IS LLABLE TO BE AFFECTED BY CONTACT WITH THE METAL
27
•
PROVISIONAL SPECIFICATION left by the said John Clark at the Office of
the Commissioners of Patents on the 2nd September 1876
JOHN CLARK, of Glasgow, in the County of Lanark, North Britain
"IM-
PROVEMENTS IN COATING METALS TO BE USED FOR PRESERVING OR CARRYING
SUBSTANCES THE PURITY OR QUALITY OF WHICH IS LIABLE TO BE AFFECTED BY
CONTACT WITH THE METAL"
This Invention has for its object to prevent substances preserved or carried in
metallic vessels from being affected in punity or quality by contact with the metal;
and it is advantageously applicable amongst other things to cans or vessels of
tinned iron such as are used for containing preserved fruits, meats, or other vegetable
or animal substances.
The Invention consists in coating the metal with collodion. The coating opera-
tion may be effected in various ways, but in the case of cans or vessels, for example,
it may be conveniently done by pouring the collodion into them and subsequently
draining it from them, a thin film being left on the surface of the metal which
quickly dries and completely answers the purpose in view.
0
SPECIFICATION filed in pursuance of the conditions of the Letters Patent and
of an Order of the Lord Charcellor, by the said John Clark in the Great Seal
Patent Office on the 19th March 1877.
JOHN CLARK, of Glasgow, in the County of Lanark, North Britain. "IMPROVE-
MENTS IN COATING METALS TO BE USED FOR PRESERVING OR CARRYING SUBSTANCES
[Price 20.1

page_text: THE PURITY OR QUALITY OF WHICH IS LIABLE TO BE AFFECTED BY CONTACT WITH
THE METAL.'
33
My said Invention has for its object to prevent substances preserved or carried in
metallic vessels from being affected in purity or quality by contact with the metal,
and it is advantageously applicable amongst other things to cans or vessels of
tinned iron, such as are used for containing proserved fruits, neats, or other
vegetable or animal substances.
My Invention consists in coating the metal with collodion; the coating operation
may be effected in various ways, but in the case of cans or vessels for example, it
may be conveniently done by pouring the collodion. into them, and subsequently
draining it from them, a thin filin being left on the surface of the metal which
quickly dries and completely answers the purpose in view
The collodion employed may be of the ordinary commercial quality. The metal
to which the collodion is applied should be in a clean and dry state, and in the case
of ordinary tinned iron ware it may be sometimes desirable to wash the surface with
a hot solution of soda crystals, or with methylated spirit to insure the necessary
cleanness.
Having thus particularly described my said Invention and the manner of per-
forming the same, I have to state that what I claim as secured to me by the
herein-before in part recited Letters. Patent is, the coating of metals with collodion,
substantially as and for the purposes herein-before described.
In witness whereof, I, the said John Clark, have hereunto set my hand and
seal, this Twenty-seventh day of February, in the year of our Lord One
thousand eight hundied and seventy-seven.