THE MANUFACTURE OF A NEW OR IMPROVED MATERIAL OR MEANS FOR REMOVING INK STAINS FROM THE "} HUMAN SKIN AND APPARATUS THEREFOR
Year: 1882

page_text: PROVISIONAL specificatiON left by George Frederick Redfern at the
Office of the Commissioners of Patents on the 26th September 1882.
Communicated to him from abroad by Henry Buczkowski of the firm of
Reithoffer and Neffe of Vienna in the Empire of Austria.
GEORGE FREDERICK REDFERN of The General Patent Office, N° 4 South Street,
Finsbury in the county of Middlesex, Patent Agent "THE MANUFACTURE OF A
NEW OR IMPROVED MATERIAL OR MEANS FOR REMOVING INK STAINS FROM THE
"}
HUMAN SKIN AND APPARATUS THEREFOR [Communicated to him from abroad
by Henry Buczkowski of the firm of Reithoffer and Neffe of Vienna in the Empire
of Austria.]
This invention has for its object the production of a new or improved means or
material for removing ink stains or ink blots from the hands or other parts of the
human body which may become soiled therewith, and the invention consists
substantially in the employment of leaflets of paper or woven fabric or of other
suitable material impregnated or imbibed with a solution of oxalic acid or sorrel-
salt or other oxalate in alcohol and prepared as hereinafter described, which leaflets
when so impregnated may be employed in a similar manner to that in which
ordinary toilet soap is used.
The process and apparatus by means of which the said leaflets for removing ink
stains are manufactured, are as follows:-
About seven hundred and fifty parts of crystallized oxalic acid are melted at
ninety degrees Centigrade and then dissolved in about two hundred and fifty
parts of warm alcohol. The oxalic acid may be replaced by citrate or tartaric
acid in the proportion of about one part of acid to one part of alcohol or by any
Balts of these acids, soluble in alcohol, oxalic acid is however preferred. After
any one of the said solutions is so prepared, it is allowed to deposit and is then
carefully decanted.
The pure solution is now placed in a trough heated by means of steam or hot
water, so as to maintain its temperature at about fifty degrees Centigrade. The
paper or woven fabric to be coated and impregnated with the salt or acid comes
from an unrolling apparatus over a guide roller into the said trough in which it is
passed through the liquid by means of a roller placed in the trough; other rollers
remove from the surface of the paper or woven fabric the surplus liquid, which
.

page_text: drops back into the trough. The impregnated paper is then conducted by means
of two guide rollers to a hollow metallic cylinder heated by means of steam or
otherwise and is dried by being caused to travel over a great part of the
circumference of this cylinder.
In order to prevent the coating of salt or acid from absorbing moisture, which it
would do on account of its hygroscopic nature, if it were not isolated from the
atmosphere and to prevent it from crumbling off when the leaflet is bent, the
coated and dried paper or fabric should be covered with a thin layer of paraffine,
wax, ceresine or ozokerite or of a mixture of two or more of these substances.
To effect this the hereinbefore described apparatus is fitted with a second trough
containing one or a mixture of two or more of the said substances in a melted state
and constantly maintained at melting point by steam or other suitable means,
Above the trough are arranged two heated cylinders rotating in opposite directions
to each other.
The lower part of the bottom cylinder is immersed in the hereinbefore described
melted substance which it carries along on its surface while rotating; by this
means the coated paper or woven fabric running over this cylinder is impregnated
with the fatty substance, whilst the upper cylinder strips off the surplus quantity
and spreads uniformly that quantity of the substance which permeates the paper or
fabric.
The new or improved material for removing ink stains from the. hands or other
parts of the human body is now ready to be conducted to a drum on which it is
rolled. From this drum it passes to a cutting machine by which it is cut, punched
or pressed into leaflets of the desired form and size