IMPROVEMENTS IN THE MANUFACTURE OF ORNAMENTAL TILES, OR BLOCKS OF EARTHENWARE
Year: 1882

page_text: LETTERS PATENT to Jasper Wetter, of New Wandsworth, Surrey for an
Invention of IMPROVEMENTS IN THE MANUFACTURE OF ORNAMENTAL TILES,
OR BLOCKS OF EARTHENWARE a communication to him from abroad by Jean
Baptiste Boulenger, of Auneuil, France
PROVISIONAL SPECIFICATION left by the said Jasper Wetter at the Office
of the Commissioners of Patents on the 15th November 1882.
"
JASPER WETTER, of New Wandsworth, Surrey, "IMPROVEMENTS IN THE
MANUFACTURE OF ORNAMENTAL TILES OR BLOCKS OF EARTHENWARE," a commu-
nication to me from abroad by Jean Baptiste Boulenger, of Auneuil, France,
This invention has for its object to manufacture tiles or blocks of ceramic ware.
Iraving incrustations through their whole thickness.
For this purpose I make the tiles of two different materials, which the action of
the fire hardens equally, but colours differently, either by choosing as raw materials
two kinds of earth which have naturally the said quality, or by adding foreign
substance. The earthy material is first diluted with water and purified by sieves
before use. The liquid paste intended to form the pattern is cast in a metallic
mould without bottom, which has the shape of the pattern, this mould is placed
inside another metallic mould having the shape of the tile and receiving the second
kind of paste, these moulds having previously been placed on a plane surface of
plaster of Paris or other absorbent and non-adhesive material.
After casting the pattern as described, the inner mould is carefully removed,
while the outer mould, previously greased, is left until the tile has been separated
from its walls by contraction.
Tiles thus obtained are then baked like other ceramic tiles.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Jasper Wetter in the Great Seal Patent Office on the 12th May
1883.
JASPER WETTER, of New Wandsworth, Surrey
"IMPROVEMENTS IN THE
MANUFACTURE OF ORNAMENTAL TILES OR BLOCKS OF EARTHENWARE & commu-
"
nication to me from abroad by Jean Baptiste Boulenger, of Auneuil, France,
This invention has for its object to manufacture tiles or blocks of ceramic ware
having incrustations through their whole thickness.
The tiles or blocks are composed of combinations of various earthy materials
which the action of the fire hardens equally but colours differently, either owing to
their natural composition or in consequence of the addition of foreign substances.
Before being used, the earth is purified, which is carried out by passing the same
through sieves after having been diluted with water.
The desired patterns are obtained in the following way.
The earthy materials which assume (by burning) various colours, are cast in the
shape of liquid paste prepared as described above, into a metallic mould without
bottom and divided into compartments, each compartment receiving a separate kind
of paste according to the design or pattern.
This mould is situated inside another metallic nould without bottom and
representing the exact shape of the tile, the said moulds having been placed on a
plane surface of plaster of Paris or other absorbent and non-adhesive material before
the moulds are filled with paste.
After the casting, the interior mould, that is to say, the one divided into
compartments, is carefully removed, while the exterior mould giving the tile its
outer shape, and which has previously been greased or coated with a layer of any
suitable material preventing the adhesion of the paste, is left until the tile separates
spontaneously from its walls owing to drying and contraction.
The size of the moulds varies according to the size of the tiles, allowance being
made for drying and contraction.
Instead of using a plane surface of plaster for supporting the moulds, they may
be placed on a plane surface of other material which has been powdered over with
earth for preventing the escape of liquid.
For the purpose of more rapidly absorbing the water contained in the paste, the
tile may also be powdered over with earth in which case, after the removal of the
interior mould, and after the required desiccation, the two surfaces are scratched for
removing the powdered earth adhering to the tiles, so as to allow the surface of the
pattern to appear.
The tiles thus prepared are then pressed, piled up for drying and subsequently
baked like other ceramic tiles.
For the purpose of giving more sharpness to the lines of the design or pattern,
the interior mould may also be greased before use.

page_text: other, and removing the inner mould before the material is dry, substantially
as described
The process of producing tiles or blocks of ceramic ware, having incrustations
through their entire thickness, substantially as described.
In Witness whereof I, the said Jasper Wetter, have hereunto set my hand
and seal this twelfth day of May A D 1883.
T WATTED