A New Product for Use in Substitution of Sheet Glass for Windows, Engraved Glass, Painted Glass, Blinds, Curtains, and other Purposes
Year: 1895

page_text: Date of Application, 18th Dec., 1895-Accepted, 22nd Feb.,
1896
COMPLETE SPECIFICATION.
A New Product for Use in Substitution of Sheet Glass for
Windows, Engraved Glass, Painted Glass, Blinds, Curtains,
and other Purposes.
I, JOSEPH BADON, of 24 Rue de Lausanne, St. Gilles, Brussels, Belgium,
Engineer 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 object of my invention is a new product which I term "Rideau vitre or
glazed curtain which is composed of wide meshed tissue or fabric such as tulle,
lace, gauze, muslin, wire gauze, &c. covered with a film of gelatine, gums, or gum-
like substances, dextrine, sugar, albumen, etc. or generally any substances which
may be rendered insoluble by the bichromates of potassium, ammonia, or the like
by the action of light.
These substances may be employed alone or in combination in variable
proportions according to the result desired.
After this film has been rendered insoluble by exposure to the light it receives
impressions forming decorative subjects of the kind usually adopted for art glass,
stained glass, engraved glass, painted glass &c.
The purpose of the invention therefore is to form a product similar to the
materials just mentioned and to be employed in lieu of same.
The means adopted for spreading or smearing the gelatine or other coating
with a bichromate directly added, over the tissue or fabric are the same as those
used for dressing fabrics either by the use of a brush, a funnel or hopper, or of
cylinders, or by steeping in the coating liquid and stretching the tissue on frames
for drying, or by other means.
When the product or material is dry and after the coating has been rendered
insoluble by exposure to the light, the material is calendered and is "finished
by the usual methods employed in dressing fabrics for making it smooth and
glossy.
These operations may be repeated if necessary until the desired thickness of the
film has been obtained.
Another mode of operation is by the means employed in photography, viz.: by
floating the liquid coating over a glass slab or other smooth polished surface fitted
up perfectly horizontal,
The tissue is then laid on this layer of coating and it is afterwards covered by
another layer of coating, the tissue being interposed between two layers, one of
which in contact with the slab is perfectly smooth and bright.
Another method of applying the coating to the open meshed tissue is by means
of a waxed or oil cloth, or cloth with an india rubber or other smooth flexible
and insoluble covering face. The tissue is spread or stretched on this cloth after
greasing or covering the surface of the cloth with talc, or its equivalent, and the
whole is passed under a funuel or hopper or a cylinder which deposits a layer of
the coating of desired thickness, and after drying, the coated tissue is separated
from the oil cloth which served as a support.
Instead of adding the bichromate directly to the coating, the film may be
sensitised by passing it through a bath of solution containing from 3 to 5% of
bichromate or it may be sensitised by covering it with a layer of bichromate in
solution. This layer is applied by the means usually employed in the manufacture
Duinn Q1

page_text: of wall paper and oil cloth, either by cylinders, mechanical brushing, paint brushes
by hand, or other means.
A washing with cold or tepid water with or without alum will bleach the
material, and the excess of bichromate removed. Colouring powders or substances
may be incorporated with the coating liquid for imparting the tints or colours
desired.
This new product may be rendered insoluble and waterproof by oil varnish
applied on both sides, the varnish then forming a constituent part of the product.
In this case it is optional to bichromate the gelatinous or mucilaginous coating or
not, the oil varnish being a sufficient covering to make the product insoluble and
waterproof.
The product thus produced constitutes a transparent insoluble and waterproof
oil cloth replacing sheet glass in its various applications.
The impressions or designs may be effected by any method, photographic or photo-
type, zincographic, and other processes in which photograhy is employed; also
lithography, printing, or copper-plate process. They may be obtained by the
platen or cylinder method as for transparencies, or by engraved cylinders as
employed for printing cloth, sanitary or washable wall papers, oil cloth, or by any
other method.
To form decorative panels composed of pieces.joined together such as borders,
centre pieces, &c. the pieces are sewn together, care being taken to cover the seams
or joins with bichromated gelatine and to stick a covering fillet over the joint.
Instead of sewing the pieces together it may suffice to join them end to end
with bichromated gelatine and cover the joints with a fillet.
These panels may be mounted in frames of wood or other material and placed or
fixed in position they are to occupy.
The advantages of this new product are:-
1. Its cheapness compared to the cost of similar products such as art glass,
engraved glass, painted glass etc. and it thus comes within the means of everyone
to ornament or decorate the home at a small expense.
2. Its insolubility and its impermeability to atmospheric influences renders it
suitable for use in substitution for window glass, sheet glass, engraved glass, painted
glass, and the like.
3. Its flexibility makes it practically unbreakable which renders it very
endurable.
4. Its suppleness permits it to be rolled up, or used as blinds, curtains, etc.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. As a manufacture, the above described product for use in substitution for
window or sheet glass, engraved glass, painted glass, for blinds, curtains, vellum,
also for decorative purposes.
2. The process for obtaining the above described product consisting in the
combination of the methods above indicated for the manufacture of the new product
with the processes described for its decoration.
Dated this 19th day of December 1995.
H. GARDNER,
Patent Agent, 166 Fleet Street, London,
Agent for the said Joseph Badon.