A Process for the Manufacture of Waterproof Paper, Fabric, and the like.
Year: 1897

page_text: Date of Application, 12th May, 1897-Accepted, 14th Aug., 1897
COMPLETE SPECIFICATION.
A Process for the Manufacture of Waterproof Paper, Fabric, and
the like.
I, DR. ADOLF SCHEUFELEN, of 120 Hauptstrasse, Oberlenningen, Wurtemburg,
Germany, Cheinist, 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 :-
This invention has for its object the manufacture of water-proof paper, fabric,
and the like. The object is attained by fixing caseine compounds on or in the paper
or fabric by means of formic aldehyde. The fixture is effected by impregnating or
besmearing paper, fabric, and the like with a solution of caseine and then treating
it with gaseous formic aldehyde.
The invention may also be used for manufacturing paper, fabric, and such like,
suitable for printing purposes having a non-sensitive water-proof mineral coating.
In this case the mineral substances are secured as a coating to the paper or
fibrous material by means of caseine compounds fixed by the aid of formic aldehyde.
The simplest way of carrying out this treatment is to impregnate or besmear the
paper, fabric, or the like with solutions of caseine compounds and of mineral
substances and then to treat the same with gaseous formic aldehyde.
I give, by way of example or illustration, one way of practically carrying out the
process. The procedure is as follows:-
A solution of a caseine compound such as, for instance, an albuminate of ammonia
prepared from the caseine of milk is either alone or in combination with mineral
substances divided in water and the paper, fabric, or the like, is then besmeared
or saturated with the liquid mass on one or both sides. To ensure the perfect
adhesion of the coating formed with the caseine compound upon the surface on
which it has thus been laid and to render the same more or less insoluble in water,
the paper, fabric, and the like, previously treated in the manner above set forth, is
exposed to the action of gaseous formic aldehyde or of solutions of formic aldehyde;
or formic aldehyde may be added to the beforementioned inass which would likewise
render the coating more or less insoluble in water after it had been once properly.
dried. As the soluble caseine solution solidifies on the surface of the paper the
mineral component parts become so firmly embedded that, after such treatment,
they are not liable to be loosened.
In practice it is of the utmost importance that, when paper, fabric, or the like
has been prepared and dried and is about to be subjected to the action of formic
aldehyde it should be perfectly free of moisture.
Paper treated in this manner is particularly suitable for printing engravings on.
The elastic coating has not the unpleasant smell of animal glue or size. Further,
papers coated in the manner hereinbefore set forth are not so sensitive to moisture
as papers coated with other preparations for the same purpose.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I
consider novel and desire to claim is :-
1. The process of manufacturing water-proof paper, fabric, and the like consisting

page_text: in fixing compounds of caseine on the fibres by means of formic aldehyde,
substantially as set forth.
2. The process of manufacturing a mineral coating for paper, fabric, and the like
so as to render the same suitable for printing purposes and insensible to moisture
as well as water-proof, in which the mineral substances are secured to the material
by means of compounds of caseine fixed with the aid of formic aldehyde, substantially
as set forth.
3. As an article of manufacture, paper, fabric, or the like made water-proof by
means of a coating or impregnation of caseine fixed by means of formic aldehyde,
substantially as set forth.
4. As an article of manufacture, paper, fabric, and the like having a mineral
coating the mineral substances.being embedded in caseine fixed with the aid of
formic aldehyde, substantially as set forth.
www
VHIS
COT
LOW TO Lan
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.

page_text: Date of Application, 12th May, 1897-Accepted, 14th Aug., 1897
COMPLETE SPECIFICATION.
A Process for the Manufacture of Waterproof Paper, Fabric, and
the like.
;
I, Dr. ADOLF SCHEUFELEN, of 120 Hauptstrasse, Oberlenningen, Wurtemburg,
Germany, Chemist, 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 :-
This invention has for its object the manufacture of water-proof paper, fabric,
and the like. The object is attained by fixing caseine compounds on or in the paper
or fabric by means of formic aldehyde. The fixture is effected by impregnating or
besinearing paper, fabric, and the like with a solution of caseine and then treating
it with gaseous formic aldehyde.
The invention may also be used for manufacturing paper, fabric, and such like,
suitable for printing purposes having a non-sensitive water-proof mineral coating.
In this case the mineral substances are secured as a coating to the paper or
fibrous material by means of caseine compounds fixed by the aid of formic aldehyde.
The simplest way of carrying out this treatment is to impregnate or besmear the
paper, fabric, or the like with solutions of caseine compounds and of mineral
substances and then to treat the same with gaseous formic aldehyde.
I give, by way of example or illustration, one way of practically carrying out the
process. The procedure is as follows:-
A solution of a caseine compound such as, for instance, an albuminate of ammonia
prepared from the caseine of milk is either alone or in combination with mineral
substances divided in water and the paper, fabric, or the like, is then besmeared
or saturated with the liquid mass on one or both sides. To ensure the perfect
adhesion of the coating formed with the caseine compound upon the surface on
which it has thus been laid and to render the same more or less insoluble in water,
the paper, fabric, and the like, previously treated in the manner above set forth, is
exposed to the action of gaseous formic aldehyde or of solutions of formic aldehyde;
or formic aldehyde may be added to the beforementioned mass which would likewise
render the coating more or less insoluble in water after it had been once properly
dried. As the soluble caseine solution solidifies on the surface of the paper the
mineral component parts become so firmly embedded that, after such treatment,
they are not liable to be loosened.
In practice it is of the utmost importance that, when paper, fabric, or the like
has been prepared and dried and is about to be subjected to the action of formic
aldehyde it should be perfectly free of moisture.
Paper treated in this manner is particularly suitable for printing engravings on.
The elastic coating has not the unpleasant smell of animal glue or size. Further,
papers coated in the manner hereinbefore set forth are not so sensitive to moisture
as papers coated with other preparations for the same purpose.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I
consider novel and desire to claim is :-
1. The process of manufacturing water-proof paper, fabric, and the like consisting

page_text: in fixing compounds of caseine on the fibres by means of formic aldehyde,
substantially as set forth.
2. The process of manufacturing a mineral coating for paper, fabric, and the like
so as to render the same suitable for printing purposes and insensible to moisture
as well as water-proof, in which the mineral substances are secured to the material
by means of compounds of caseine fixed with the aid of formic aldehyde, substantially
as set forth.
3. As an article of manufacture, paper, fabric, or the like made water-proof by
means of a coating or impregnation of caseine fixed by means of formic aldehyde,
substantially as set forth.'
4. As an article of manufacture, paper, fabric, and the like 'having a mineral
coating the mineral substances being embedded in caseine fixed with the aid of
formic aldehyde, substantially as set forth.