Improvements in the Production of Enamelled' Letters and Designs on Glass, Porcelain, Stoneware, and other Surfaces.
Year: 1893

page_text: Date of Application, 12th June, 1893
Complete Specification Left, 11th Apr., 1894-Accepted, 12th May, 1894
Improvements in the Production of Enamelled' Letters and Designs
on Glass, Porcelain, Stoneware, and other Surfaces.
I, CHARLES HODAN of Howard Buildings, Central Street, Saint Luke's in the
City of London, Manufacturer do hereby declare the nature of this invention to
be as follows:
--
According to this invention I produce or apply letters, writing and designs in
relief to glass, porcelain, stoneware and other surfaces in a new or improved manner
all as hereinafter described:
Heretofore raised enamelled writing and designs have for many years been
produced by putting the same upon the glass or other surface by means of a brush
and thin enamel paint. By my invention I produce somewhat similar effects but in
a very much more expeditious manner and so that I may multiply or reproduce the
same writing, pattern or design at a very small cost.
In my invention I use suitable stencil plates in conjunction with specially
prepared plastic composition. The stencil if used for flat surfaces may be of a rigid
material or of greater thickness than the stencils to be used for curved or irregular
surfaces which latter require the use of stencils made of tin foil or other suitable
flexible or plastic material or composition.
The composition is made in the form of a thick tough paste translucent or
opaque of any desired colour and of such a nature as to form an enamel when fired.
The stencil having been placed on the glass porcelain or other article the composition
is forced through the stencil. The article thus treated is then fired and the writing
or design will be in enamel of a permanent adhesive nature and of a good appearance.
The enamelled letters, writing or design may receive a coating of gold silver or
other metal and the article refired. Or such coat may be put on before the first
firing. The stencils may be simple letters or words or a design and the same stencil
may in that case be used for reproducing the same inscription or design on any
desired number of articles.
Instead of applying the enamel composition direct to the glass or other surface 1
may in some cases and especially for curved or irregular surfaces apply the stencil
process to paper or the like with the letters words or design reversed and I then
transfer the writing or design to the glass or other surface.
Dated this 12th day of June 1893.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.
Improvements in the Production of Enamelled Letters and Designs
on Glass, Porcelain, Stoneware, and other Surfaces.
I, CHARLES HODAN of Howard Buildings, Central Street, St. Luke's in the
City of London, Manufacturer, do hereby declare the nature of this invention
and in what inanuer the same is to be performed to be particularly described
and ascertained in and by the following statement:-
-
According to this invention 1 produce or apply letters, writing and designs in
rel ef to glass and also to porcelain, stoneware and other surfaces in a new or
improved manner all as hereinafter described.

page_text: Heretofore raised enamel writing and designs have for many years been produced
upon the glass or other surface by means of a brush and thin enamel paint and this
method depends upon the skill of the workman and takes much time. Nor is it
scarcely possible thereby to reproduce exact copies. By my invention I produce
somewhat similar effects but in a many times more expeditious manner and so that
I may multiply or reproduce the same writing, pattern or design at a very small
cost, thus for instance providing any number of bottles of the same size and shape
with precisely the same inscription, trade mark or design in raised enamel. In my
invention I use stencil plates containing the required letters, writing or desigo. If
the surface operated on is flat the stencil plate may be of rigid material or as thick
as desired. If the surface is cylindrical or of some other even curve the stencil
plate may suitably be made of tinfoil or other suitable, flexible material. This I
also prefer to use for flat surfaces. The enamel composition which is used in my
invention is made with glass powder (by preference the so-called cameo enamel
powder) and with turpentine and "glaze" worked up into a paste of the consistence
of treacle and applied to the surface through the openings in the stencil plate by
means of a spatula.
The enamel composition may be made up in any desired colour and either
translucent or opaque. The glass or other article provided with the writing or
design is then fired in a kiln or muffle until it shews a bright red, whereupon
the fuel is withdrawn. The writing or design so produced on the glass or other
article will be in enamel of a permanently adhesive nature and of a good
appearance having a flat face and almost sharp square edges. The writing or
design may receive a coating of gold, silver or other metal, and the article then
refired; or the coating may be put on in the first instance before firing. The
same stencil may obviously be used over and over again for reproducing the
same inscription or design on any desired number of articles.
Instead of applying the enamel composition directly to the glass or other
surface I, in some cases, and especially or necessarily for irregularly curved
surfaces or surfaces curved both ways apply the enamel composition by the
aforesaid stencil process to sized paper or the like by preference of the kind
used for sand blasting with the writing or design in reversed position and then
transfer the writing or design to the surface of the glass or other surface, the
paper having been damped first so that it can conform to the curved surface.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The production of raised flat enamel writing or designs on articles of glass
ceramic ware and other suitable surfaces by applying a suitable enamel composition
to the glass or other article through a stencil plate and then exposing the article to
heat in a kiln or muffle substantially as set forth.
2. The production of raised flat enamel writing or designs on articles of glass,
ceramic ware and other suitable surfaces by applying a suitable enamel composition
to sized paper or the like through a stencil plate in the reversed position, transferring
the writing or design to the glass or other article from the paper in a damped state
and then exposing the article to heat in a kiln or muffle substantially as set forth.
Dated this 11th day of April 1894.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.