Improvements in the Manufacture of Perforated Stuffs.
Year: 1891

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture of Perforated Stuffs.
CARL OTTO SCHNAUDER, of Chemnitz, and ERNST BRUNO SCHLEGEL, of
Borna, near Chemnitz, in the Kingdom of Saxony, Germany, 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 :-
The perforation of stuffs, which might replace curtains, coverlets and the like,
has hitherto very little been made use of, since the unravelling of the woven fabrics
very soon spoiled the designs and made the articles useless in a very short time;
that is to say the stuff operated upon was not dense enough in its structure, nor had
the fibres sufficient adhesive qualities to allow the slightest wear and tear.
addition to this, nothing was found, that could boast of the requisite softness or
pliancy.
In
Another feature to be considered as a great drawback in the introduction of
material of this kind, were the rolls used for perforating. They were made of steel
being tempered after the desired pattern was engraved upon them. One might
think rolls of this make would do well, they however were found to be quite deficient
especially for fine and delicate work.
does
Our invention which we will now proceed with to set forth, completely away
with the above quoted defects.
The material, we use, is prepared in this manner :-To a solution of caoutchouc
in bi-sulphuret of carbon is added zinc-white (ZnO) in equal proportion to the
caoutchouc, the whole being thoroughly stirred up until a complete mixing has taken
place and then allowed to rest. During the exhalation of the bi-sulphuret of carbon,
which now takes place, a greater portion of the same will be absorbed by the zinc-
white and the mixture being coagulated and dry is then of such a condition enabling
it to be rolled down to very thin, fine sheets. These sheets, forming the main
object of our invention, are as soft and pliable, and have the same appearance as
those costly curtains and similar weavings.
The perforating of the sheets is accomplished by the machine illustrated by the
accompanying drawing.
The roll a is a plain one and we prefer making the same of wrought-iron, the
roll & however is made of phosphuret of bronze and has upon its surface the desired
pattern stamped out in sharp cutting outlines. This roll stands against wear and
tear exceedingly well. The pattern is not injured, although the pressure it has to
undergo is a very great one, and the perforation of the cloth is always neat and of
extreme sharpness. The bearings of the upper wrought-iron roll are supported
by the screws S to be lowered and raised in turning the hand-wheel w by which
means the roll may be pressed hard against the lower one or released therefrom.
The normal working pressure however is accomplished by the weight g whose gravity
is transmitted to the screws S by leverage. By the handle and the cam c the
weight ginay be caught up, thereby releasing the rolls altogether in order to displace
them in the usual manner.
In place of caoutchouc we may in some cases prefer to employ parchment paper
whereby, however, an addition of glycerine must be made in order to obtain the
requisite pliability in the finished stuff. In this second modification of our invention
the mixture therefore will consist of paper half stuff employed in the manufacture
of parchment, glycerine, and zinc-white being added to the stuff while still in the
poacher.
The addition of glycerine also may be made use of in the first mixture of
caoutchouc, if an increased pliability of the stuff is desired.
In both modifications any desirable colouring may be applied, which in some cases

page_text: we may prefer combined with the zinc-white or in other cases, we may prefer to
replace the zinc-white altogether by other 'colours.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is
In the manufacture of white and colored perforated and 'figured stuffs :-
1. The method of manufacturing smooth and flexible plates by dissolving caout-
chone in carbonic disulphide, and by solidifying said solution after having it mixed
with any white or coloured dye-stuff before; the mass produced adapted to be
rolled, substantially as described.
2. The method of manufacturing smooth and flexible perforated plates by dis-
solving caoutchouc in carbonic disulphide, and by solidifying said solution after
having it mixed before with any white or coloured dye-stuff; the mass produced
being rolled into plates and perforated by rollers provided with any pattern or
design, substantially as described.
"3. The method of manufacturing smooth and flexible perforated and figured plates
by dissolving caoutchouc in carbonic disulphide, and by solidifying said solution
after having it mixed with any white or coloured dye-stuff before; the mass pro-
duced being rolled into plates and perforated and figured by engraved or embossed
rollers, substantially as described.
4. "The method of manufacturing smooth and flexible' plates by dissolving paper-
parchment in carbonic disulphide, and by solidifying said solution after having it
mixed with glycerine and with any white or coloured dye-stuff before the mass
produced adapted to be rolled, substantially as described.
5: The method of manufacturing smooth and flexible perforated plates by dis-
solving paper-parchment in carbonic disulphide, and by solidifying said solution
after having it mixed with glycerine and with any white or coloured dye-stuff";
the mass produced being rolled into plates and perforated by rollers provided with
any pattern or design, substantially as described.
6. The method of manufacturing smooth and flexible perforated and figured
plates by dissolving paper-parchment in carbonic disulphide, and by solidifying
said solution after having it mixed with glycerine and with any white or coloured
dye-stuff before, the mass produced being rolled into plates and perforated and
figured by engraved or embossed rollers; substantially as described.
7. The method of manufacturing smooth and flexible perforated and figured
plates by dissolving caoutchouc or paper-parchment in carbonic disulphide, and by
solidifying said solution after having it mixed with glycerine and with any white or
coloured dye-stuff before; the mass produced being rolled into plates, and perforated
and figured by rollers made of phosphor-bronze and provided with any pattern or
design, substantially as described.
Dated this 16th downf
1001
'FREDK. WALKER,
11, Furnival Street, Holborn, E.C., Agent for the Applicants.