like water-proor.
Year: 1889

page_text: Date of Application, 4th Apr.. 1889
Specification Accepted 11th May, 189
like water-proor.
We, MICHAEL GAUGL and JOSEF MÖSSNER, both of the City of Wien, Austria,
Gentlemen, 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 :-
Our invention relates to an improved method of rendering cloth, felt, paper and the
like water-proof, and is applicable to all such materials the texture of which are at all
capable of impregnation and the advantages we claim for our process are cheapness
and efficiency the color and that the appearance of the materials treated do not alter
in the least, and that the air passes almost as freely through the material before as
after the treatment.
According to my invention we make a solution of Isinglass from which solution we
remove, by means of suitable well known chemicals such as caustic soda or the like,
any acid matter it may contain, and the non-acetic solution of Isinglass thus obtained
we add to other well known solutions generally employed for a like purpose with the
view of ameliorating their action. We can also use the solution without neutralizing
the acid but we do not consider it to be so efficient.
The manner in which we prefer to carry our invention into effect is as follows:
We dissolve about one part by weight of dry Isinglass in about twenty parts by
weight of hot water, and afterwards filter and neutralize the solution, for which later
purpose we prefer to use caustic soda, which we add little by little until so much has
been added that blue litmus paper does not turn red when plunged into the solution.
In consequence of this operation the solution becomes cloudy and must therefore
be left quietly until the precipitate has had time to deposit, which we prefer to filter
t again.
Independently of the solution just described we make another solution from about
10 parts by weight of sugar of lead and 20 parts by weight of hot water.
Again independently of the two solutions above described we make a third solution
rom about 6.27 parts by weight of Alum in about 150 parts of hot water.

page_text: We mix the three solutions mentioned with each other and leave then quietly for
some time to deposit any precipitate there may be, which precipitate consists
especially of lead sulphate, which when separated, from the solution may be washed
and utilized as a paint.
The elimination of the said lead sulphate does away practically with any poisonous
or unwholesome ingredients which otherwise are formed in the course of the described
process.
The clear solution now arrived at is weakened with suitable proportions of water, so
that a liquid wash of suitable consistency is produced, and it will generally be found
suitable to add so much water that the solution is made up to about 300 parts by
weight.
The goods to be made water-proof are soaked, kneaded and otherwise treated until
thoroughly saturated; They are afterwards dried and otherwise treated and finished
in the usual way.
Paper and like material need not be entirely steeped in the wash but may be painted
with it.
We may mention that we prefer to use Indian Isinglass on account of its cheapness.
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:
1. The method of improving well known solutions for rendering cloth, felt, paper
and the like water-proof by the addition of solutions of Isinglass.
2. The process for producing a wash for rendering cloth, felt, paper and the like
water-proof, substantially as herein before described and set forth."
London, April 4th 1889.
MICHAEL GAUGL.
JOSEF MÖSSUM.
Per C. R. Bonne & Co.,
41, Eastcheap, E.C.,
Their Agents.
MICHAEL GAUGL.
JOSEF MÖSSUM.
Per C. R. Bonne & Co.,
41, Eastcheap, E.C.,
Their Agents.