Year: 1896

page_text: Date of Application, 4th Feb., 1896
Complete Specification Left, 3rd Nov., 1896-Accepted, 9th Jan., 1897
We, THE "LEHNER" ARTIFICIAL SILK Co. LTD. District Bank Chambers,
Market Street, Bradford, Manufacturers and Dr. FRIEDRICH LEHNER Chemist
of Zurich, Switzerland do hereby declare the nature of this invention to be as
follows:-
Our invention relates to and has for its object improvements in the production
of embroideries.
Certain embroideries are at present produced by hand or machine a thin wover
textile material serving as a basis. When the embroidery is finished such material
is cut away by hand or sometimes it is chemically prepared beforehand so that
after the embroidery is finished it can be removed or destroyed by burning it out
at a heat of about 120° Centigrade. Cutting away the basis by band makes this
class of embroidery very expensive. When the basis is chemically prepared it has
the disadvantage of spoiling the machines and moreover in natural silk embroideries
in which burning of the basis is resorted to it is not possible to produce a pure
white or any other light colours.
Our improvements refer to new embroideries in which artificial silk takes the
place of natural silk, or if less lustre be sufficient ramie or rhea fibre may be
used or any other textile fibre which practically consists of cellulose, or also wool
may be used. As basis for our embroideries we use a thin woven texture of
natural silk. Our process is based upon the difference in the action of certain
chemicals upon real silk and upon cellulose fibres. Inasmuch as natural silk is
destroyed by dilute acids, free chlorine (Cl.) and the like and whereas artificial
silk, ramie, wool or cellulose fibres are not attacked thereby our process is as
follows:-
For removing the basis of embroidery produced of the materials above specified
such embroidery is placed in a solution of chloride of lime about 4° Beaumé. In
this bath the natural silk basis is destroyed in a few minutes. This treatment
does not however in any way affect the embroidery which is thereupon well rinsed
in water and drawn through a very weak bath of dilute hydrochloric acid, it is
then again well washed in water and dried.
Instead of a solution of chloride of lime for removing the basis we may employ
baths of more or less concentrated acids such as for instance dilute sulphuric of
about 10° Beaumé, hydrochloric of about 20° Beaumé, nitric of about 100 Beaumé
and so forth.
1896
THE "LEHNER" ARTIFICIAL SILK COMPANY
LIMITED,
O. BEREND, Director.
FRIEDRICH LEHNER.

page_text: COMI DELE DIECIFICATION,
Improvements in Embroideries.
We, Doctor FRIEDRICH LEHNER, Chemist, Zurich Switzerland and THE
"LEHNER" ARTIFICIAL SILK Co. LIM. District Bank Chambers, Market
Street, Bradford Manufacturers 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 and has for its object improvements in the production
of embroideries.
Certain embroideries are at present produced by hand or machine, a thin woven
textile material serving as a basis. When the embroidery is finished such material
is cut away by hand or sometimes it is chemically prepared beforehand so that
after the embroidery is finished it can be removed or destroyed by burning it out
at a heat of about 120° Centigrade. Cutting away the basis by hand makes this
class of embroidery very expensive. When the basis is chemically prepared it
has the disadvantage of spoiling the machines and moreover in natural silk
embroideries in which burning of the basis is resorted to it is not possible to
produce a pure white or any other light colours.
Our improvements refer to new embroideries in which artificial silk takes the
place of natural silk, or if less lustre be sufficient ramie or rhea fibre may be used
or any other textile fibre which practically consists of cellulose or also wool may
be used. As basis for our embroideries we use a thin woven texture of natural
silk. Our process is based upon the difference in the action of certain chemicals
upon real silk and upon cellulose fibres. Inasmuch as natural silk is destroyed by
dilute acids, free chlorine (Cl.) and the like and whereas artificial silk, ramie, wool
or cellulose fibre are not attacked thereby our process is as follows:-
In
For removing the basis of embroidery produced of the materials above specified
such embroidery is placed in a solution of chloride of lime about 4° Beaumé.
this bath the natural silk basis is destroyed in a few minutes. This treatment does
not however in any way affect the embroidery which is thereupon well rinsed in
water and drawn through a very weak bath of dilute hydrochloric acid, it is then
again well washed in water and dried.
Instend of a solution of chloride of lime for removing the basis we may employ
baths of more or less concentrated acids, such as for instance dilute sulphuric of
about 10° Beaumé, hydrochloric of about 20° Beaumé, nitric of about 100 Beaumé
and so forth.
In this manner we produce so called etch-embroideries in which when finished
there remains nothing of the original basis. This etching process can be employed
for embroideries whether originally produced by hand or embroidery machines or
weaving looms.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be perforined we declare that what we
claim is :-
The production of embroideries made of artificial silk or ramie ou a basis or
tissue of natural silk, which basis is removed by treatment with chloride of lime
or mineral acids substantially as set forth and described.
Dated this 2nd day of November 1896.
THE "LEHNER" ARTIFICIAL SILK COMPANY
LIMITED,
O. BEREND, Director.
FRIEDRICH LEHNER