and Apparatus for the Manufacture of Enamel Plates, Facing Tiles, and Mouldings with Undercut Fixing Pins, Ribs, or Fillets
Year: 1896

page_text: Date of Application, 13th July, 1896-Accepted, 22nd Aug., 1396
COMPLETE SPECIFICATION.
Process and Apparatus for the Manufacture of Enamel Plates, Facing
Tiles, and Mouldings with Undercut Fixing Pins, Ribs, or Fillets.
I, FRANZ JOSEF STIEL, of 25 Roonstrasse, Cologne on the Rhine, in the Empire
of Germany, Glass Manufacturer, 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:-
This invention relates to the manufacture, by pressing, of enamel plates, for
covering walls and other like purposes, provided with undercut fixing pins, ribs, or
fillets on their back faces, such fixing pins, ribs, or fillets being formed in the first
instance square to the said faces by vertical pressure, and then made oblique or
undercut with reference to such faces by horizontal pressure, by hand or by
mechanical means, while the material is still in a hot and soft condition.
In the accompanying drawings, Figure 1 is a cross section, and Figure 2 an
underside view of an enamel plate after the vertical pressure has been applied to it
to form fixing pins a and borders a', Figures 3 and 4 similar views of the same plate
after the horizontal pressure has been applied to the fixing pins.a, Figures 5 to 8 are
similar views of a plate having fixing ribs or fillets a 2 instead of pins a as in
Figures 1 to 4, Figure 9 is a cross sectional elevation of the pressing apparatus,
Figure 10 a plan, and Figures 11 and 12 side views of the same. Figures 13 and 14.
are a sectional elevation and plan respectively of the apparatus for imparting the
horizontal pressure to the pins, ribs or fillets, and Figure 15 a detail of such
apparatus.
Plates produced from enamel or opal glass by pressure in accordance with this
invention, and intended for covering or decorating the surfaces of walls, can be made
of any snitable pattern and colour and be adapted to form cornices and other
ornaments and objects having a better surface than ordinary glaze lining bricks or
tiles, and possessing greater weather-resisting qualities.
These plates are embedded in a layer of mortar placed on the wall after it is built,
so that the building of a wall intended to be lined with glazed material is materially
simplified, inasmuch as there is no necessity to take the same amount of care in
building the wall as is necessary when facing bricks have to be built into it in the
usual way.
As the new enamelled plates are provided on their backs with undercut pins,
projections, or fillets a the embedding of the back of such a plate in a layer of mortar
produces a completely secure fastening, and by means of the border fillets a¹ a close
jointing of the under side of the plate to the mortar is effected so that moisture
cannot enter between the plate and the latter from outside.
As already stated, the shape is imparted to the plate in the first instance by vertical
pressure, and the undercutting of the fixing devices on the back of the plate by
horizontal pressure, which latter takes place while the formed material is still hot,
and pliant, and it is this process which forms the important feature of the invention.
The rectangular plate A, shown by way of example in Figures 1 to 4, has on its
underside pins or projections a and border fillets a', which after the vertical shaping
pressure project perpendicularly from the plate. The projections a are then pressed
obliquely by horizontal pressure towards that side where the undercut is to be."
After placing the enamel plate on the layer of mortar the joints remaining between
them are made good with suitably coloured cement.
6717
bue love Figures 9 to 12)

page_text: are connected together by a hinge b; a lug or projection 6' on the base plate B serves:
as a stop for the cover C when the latter is open, (see Figure 12).
Between the base plate B, and the cover C is placed the plate D forming the mould,
and this plate can be held in place by the locking piece d pivotted at c.
The hollow or recess A' of the mould plate D gives the required form to the front
side of the enamel plate, and for the production of decorated plates may be engraved
in any suitable way.
A handle on the press frame serves for operating the latter, while the
handles d 2 on the mould plate D enable the said plate to be easily removed and changed
to facilitate the removal of a press plate from the mould. In order that the mould
plate D may always take its correct position in the base plate B, a projection d 3 upon
it fits into a corresponding recess in the base plate B.
"The press frame C is furnished with an opening which corresponds to the shape
and size of the piece to be pressed and receives the stamp E and the plate e at the
top.
A projecting part e of the stamp E forms the back surface of the plate A and the
edges or flanges a', see Figure 9. The pins a are produced by the recesses e 2. These
recesses are formed as longitudinal or transverse grooves when, instead of pins, fillets
or ribs a 2 are to be formed on the back of the plate.
When the plate A has been produced by vertical pressure as shown in Figures 1.
and 2, the press mould is opened and the pins a or the ribs or fillets a 2, as the case
may be, are pressed horizontally into their inclined position or undercut form, by
means by a suitable tool F, see Figures 13 to 15. This tool F, consists of a slider
moving over the open press mould in suitable guides. On this slider are arranged
vertical conical rollers ff adapted to press the fixing pins or ribs sidewise
horizontally, in the manner described, when the siider is moved along. The
enamelled plate can then be taken out of the mould and placed in the cooling
oven.
Finally it may be remarked that these novel enamel plates can be produced
cheaply because plates of the ordinary cheap glass flux (which is quite acid proof)
can be put on the front or visible surface with a suitable opaque coloured enamel
flux.
:
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
.
First. The process for the manufacture of enamel plates with undercut fixing
pins, ribs or fillets on the back thereof, which consists in first shaping, the plate
by vertical pressure, and in. then imparting an oblique direction or undercut form
to the said fixing pins, ribs, or fillets by horizontal pressure while the material is
still hot and pliant, substantially as described.
Second. Facing plates of enamel or opal glass flux. constructed with obliquely
directed or undercut fixing pins, ribs, or fillets on their rear faces, substantially as
described.
.
Third. For manufacturing enamel plates in accordance with, the first and, second
clauses hereof the employment. of pressing apparatus in, which the recess A¹ for
producing the front side of the plate is arranged in a inovable. plate D placed between
the base plate B and the hinged mould cover C, and in which the back of the plate,
including the borders and fixing pins, ribs, or fillets, are shaped by means of a stamp E
passing through the mould cover C and provided with recesses e2 for forming the
fixing pins a or ribs or fillets a', substantially, as described..
Barva vins torn day () ontv taan
ULIAR
-
LAND
FRANZ JOSEF STIEL,
Per W. H., Beck,.
115, Cannon Street, London, É.C., Agent.
FRANZ JOSEF STIEL,
Per W. H., Beck,
115, Cannon Street, London, E.C., Agent.