Year: 1888

page_text: Date of Application, 5th Dec., 1888
Complete Specification Left, 5th Sept., 1889-Accepted, 23rd Nov., 1889
manufacturer do hereby declare the nature of this invention to be as follows :-
My invention relates to the manufacture of gold, silver, copper or other metallic
coated papers and consists in first coating a specially prepared plate with a thin foil
and fixing this foil on paper, by placing the paper on the prepared plate, after the
metal has been deposited on it, by passing the plate and paper through rollers.
The chief feature of this invention is the prepared plate, which is prepared as
follows: I take a metallic or other suitable plate and cover both sides of the same
with a thin coating of fat or fatty oil. I then place this prepared plate in a bath
of the following ingredients. For silver foil the bath is as follows:
Silver 5 grammes.
Prussiate of potash 15 grammes.
Carbonate of potassium (HK, CO³) 5 grammes.
Water 1 liter.
To this I add hydrochloric acid, but not sufficient to cause percipitation. For gold
foil I substitute gold instead of silver while the other ingredients remain the same.
The prepared plate is hung in this bath, which is heated to about 60° C., for a
certain time according to the thickness of foil required: the plate is then removed
from the bath and paper laid over the coating of metal and all passed through rollers,
when the foil adheres firmly to the paper and comes off the plate, on account of the
coating of fat; the coating of foil on the paper will be found to be perfectly sound
and even.
In order to obtain a copper foil I prepare the bath as follows:
I boil nitrate of copper so long until it will not tarnish a piece of polished brass or
copper dipped in the same. The prepared plate, prepared in the same manner as for
gold or silver foil is then immersed in this bath and allowed to remain therein for a
length of time in proportion to the thickness of foil required.
The copper foil is removed from the prepared plate and fastened on paper in the
same manner as already described for the gold and silver process.
I can of course make any metallic foil in this manner according to the nature
of the bath I use.
...נ.י.ט
11:31
CD1000
COMPLETE SPECIFICATION.
Improvements in the Method of Manufacturing Papers Coated with
Metallic Foil.
I, JOHN VON DER POPPENBURG of 32 Waldemar Strasse, Berlin, Germany,
manufacturer do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
My invention relates to the manufacture of gold, silver, copper or other metallic
coated papers and consists in first coating a specially prepared plate with a thin
foil and fixing this foil on paper, by placing the paper on the prepared plate after
the metal has been electrolytically deposited on it, by passing the plate and paper
hrough rollers.

page_text: The chief feature of this invention is the prepared plate which is prepared as
follows: I take a metallic or other suitable plate and cover both sides of the same
with a thin coating of fat or fatty oil not thick enough to prevent deposition. I
then place this prepared plate in a bath of the following ingredients. For silver.
foil'the bath is as follows:
Nitrate of silver 5 grammes.
Cyanide of potash 15 grammes.
To this I add a solution of common salt, but not sufficient to cause precipitation.
· For gold foil I substitute chloride of gold instead of siver nitrate while the other
ingredients remain the same.
The prepared plate is hung in this bath, which is heated to about 60° C for a
certain time according to the thickness of foil required and through which an electric.
current is conducted. The plate is then removed from the bath and paper laid
over the coating of metal and all passed through rollers, when the foil adhears,
firmly to the paper and comes off the plate, on account of the coating of fat, the,
coating on the paper will be found to be perfectly sound and even.
In order to obtain a copper foil I prepare the bath as follows:
A solution of nitrate of copper is mixed with a solution of carbonate of sodium
the resulting precipitation of carbonate of copper is dissolved by the addition of
cyanide of potassium. The quantity of cyanide added being only sufficient. to
produce solution.
The prepared plate, prepared in the same manner as for gold or silver foil, ist
then immersed in the bath and allowed to remain therein for a length of time in
proportion to the thickness of foil required.
The copper foil is removed from the prepared plate and. fastened on paper in the
same manner as already described for the gold and silver process.
וי
To produce nickel I employ a solution of sulphate of nickel only. All the,
various baths are provided with electric connections, the precipitation in each case:
being effected by electrolysis.
Having now particularly described and ascertained the nature of my said Inven-
tion, and in what manner the same is to be performed, I declare that what I'
claim is:
In the manufacture of metallic coated paper the method consisting of covering the
plate whereon the metal is precipitated, with a thin coating of fat or fatty oil, in the
manner and for the purpose substantially as described.
Dated Berlin. this 3rd day of September 1889.
i
JOHN VON DER POPPENBURG.
By A. Kuhnt & R. Diessler,
38, Alexander Strasse, Berlin. C., Germany,. Agents for Applicant.