Improvements in the Manufacture of Tiles.
Year: 1895

page_text: Date of Application, 14th June, 1895
Complete Specification Left, 13th Mar., 1896-Accepted, 2nd May, 1896
Improvements in the Manufacture of Tiles.
We HENRY LEWIS DOULTON, Potter, and ADAM JAMES SMITH Engineer,
both of Lambeth Pottery, Lambeth, in the County of Surrey, do hereby declare
the nature of this invention to be as follows:—
This invention relates to improvements in the manufacture of tiles having
undercut recesses at the back to provide a key for the cement used in fixing the
tiles. By this invention such tiles are made by means of dies of novel construction
in an ordinary tile press, from clay in a plastic, semi-plastic or dust state. The
construction of these dies is shown in the accompanying drawings.
Figs. 1 and 2 are vertical sections through the die-box of the tile-press, and the
letters on each drawing refer to the same respective parts.
A represents the die-box of an ordinary tile-press. B is the upper die-plate,
and C the lower die-plate. On the lower face of the plate B. plates E E are
pivoted loosely at D. Fig. 1 shows the upper die-plate raised after a tile G has
been pressed, and the plates E, E are in their normal position.
When the plate B is pressed down upon the clay to form the tile, the plates E E
come into contact with the clay and are forced back flat against the plate Bas
shown in Fig. 2. The edges F F of the plates E E are cut off obliquely, so that
when the latter are pressed against the plate B the spaces they occupy form
recesses at the back of the tile which are undercut at F F. On raising the plate B
the plates E E turn on the axis D until they resume the position shown in Fig. 1.
Thus their withdrawal is effected without damage to the undercut portion of the
tile. The tile is then ejected by raising the lower die-plate C in the usual
manner.
We have found in practice that the plates E E free themselves without damage
to the tile, but to facilitate their doing so, springs or other suitable mechanical
arrangements may, if necessary, be fixed between the upper die-plate B and the
plates E E which, while permitting the latter to be forced flat against the plate B,
would, on the pressure being relieved, return them to the position shown in Fig. 1.
The plates E can each be hinged on a separate axis, or in pairs one on each side of
the same axis as shown in the drawings, and as many hinged plates are attached to
the upper die-plate as may be considered necessary to provide the tile with sufficient
key for cement. It is obvious that the arrangement above described might be
modified by attaching the hinged plates to the bottom die-plate C instead of to the
top plate B, but we prefer the arrangement we.have described.
After being pressed the tiles follow the usual course of manufacture.

page_text: Improvements in the Manufacture of Tiles.
We, HENRY LEWIS DOULTON, Potter, and ADAM JAMES SMITH, Engineer,
.both of Lambeth Pottery, Lambeth, in the County of Surrey, 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 improvements in the manufacture of tiles having
undercut recesses at the back to provide a key for the cement used in fixing the
tiles. By this invention such tiles are made by means of dies of novel construction
in an ordinary tile press, from clay in a plastic semi-plastic. or dust state. The
construction of these dies is shown in the drawings left with the Provisional
Specification.
Figures 1 and 2 are vertical sections through the die box of the tile press, and
the letters on each drawing refer to the same respective parts.
A, represents the die box of an ordinary tile press B, is the upper die-plate, and
C the lower die-plate. On the lower face of the plate B plates E E are pivoted
loosely at D. Fig. shows the upper die-plate raised after a tile G has been
pressed, and the plates E E are in their normal position.
When the plate B is pressed down upon the clay to form the tile the plates E E
come into contact with the clay and are forced back flat against the plate Bas
shown in Fig. 2. The edges F F of the plates E E are cut off obliquely, so that
when the latter are pressed against the plate B the spaces they occupy form recesses
at the back of the tile which are undercut at F F. On raising the plate B 'the
plates E E turn on the axis D until they resume the position shown in Fig. 1.
Thus their withdrawal is effected without damage to the undercut portion of the
tile. The tile is then ejected by raising the lower die plate C in the usual
manner.
We have found in practice that the plates E E free themselves without damage
to the tile, but to facilitate their doing so, springs or other suitable mechanical
arrangements may, if necessary, be fixed between the upper die-plate B and the
plates EE which, while permitting the latter to be forced flat against the plate B,
would, on the pressure being relieved, return them to the position shown in Fig. 1.
The plates E can each be hinged on a separate axis, or in pairs one on each side of
the same axis as shown in the drawings and as many hinged plates are attached
to the upper die-plate as may be considered necessary to provide the tile with
sufficient key for cement. It is obvious that the arrangement above described
might be modified by attaching the hinged plates to the bottom die plate C instead
of to the top plate B, but we prefer the arrangement we have described..
After being pressed the tiles follow the usual course of manufacture.
Having now. particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we. declare that what we
claim is
+
The method of producing undercut recesses in tiles by means of suitable plates
pivoted either to the upper or lower die-plate of the tile press substantially as
described.
DL
1000
H. L. DOULTON.
A. J. SMITH.