Improvements in the Construction of Press Dies or Plates for the Manufacture of Tiles having Undercut Recesses.
Year: 1897

page_text: Date of Application, 14th Aug., 1897-Accepted, 2nd Oct., 1897
COMPLETE SPECIFICATION.
Improvements in the Construction of Press Dies or Plates for the
Manufacture of Tiles having Undercut Recesses.
We WILLIAM BURTON of Clifton Junction near Manchester in the County of
Lancaster Earthenware Manufacturer and JOSEPH BURTON of Clifton Junction
aforesaid Potters Manager 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:―
as to act
Our invention consists of an apparatus or mechanical arrangement for producing
undercut recesses in Tiles which said apparatus is fitted into the lower die or
bottom plate of an ordinary Potters Tile Press and is arranged so
automatically in the working of a Potters Tile Press in the ordinary manner.
The construction of our said invention and the method of working the same
may be more readily explained by reference to the accompanying drawings.
Figure 1 is a sectional elevation of the lower die or bottom plate of a Potters
Tile Press in position for the moulding of a tile by the usual method and showing
In this drawing "a" are the teeth with
our apparatus fitted in the same.
projecting ends "6" "b" and represents the spindle which raises or lowers
the die. This spindle, instead of being directly attached to the die, is screwed
into the Piece "f" which is fitted into the lower die, so as to allow the piece "f"
to be raised about one eighth of an inch before moving the lower die. The
d" which engage with the
piece "f" has at each end projecting pieces "d"
66 " 66
$6
29
C
65 "
S
66
66
a
"
by means of slotted holes or grooves, the said cranks being
and engaging with the teeth
"
"a"
a
"
at e
66
<<
66
وو
"e" by
d" "d"). The
cranks
pivoted at C
means of slotted holes or grooves and projecting pieces (as at
pivot or axle "c" is fixed in the lower die, as shown in Figure 3.
Assuming that the Tile has been moulded in the usual manner whilst the lower
die with the projecting teeth "b" "b" are in the position shown in Figure 1. it
will be obvious that undercuts will be formed in the tile.
وق
In order to remove
such
66
وو
"
a
"a
"
66 "
3.
39
are
the tile from the press the lower die is raised in the usual way by the spindle
but as will be seen from the sectional elevation shown in Figure 2. the spindle "s
first raises the piece "f" independently of the lower die; and this, in so lifting,
a "a" to be
actuates the cranks or levers " g" "g" and so cause the teeth "
undercuts, as
withdrawn from the undercuts, without injury to
the tile itself and the lower die are stationary until the teeth
withdrawn to the position shown in Figure 2. when as will be seen from the
drawing the upper face of the piece "f" is in contact with the lower die which
it then raises by means of the spindle "s" sufficiently to allow the tile to be
removed in the ordinary way. The spindle is then again lowered until it
brings the lower die into position for the moulding of another tile, and, in so
996 "return
lowering, the piece "f" and the crank "g" "g" and the teeth "
into their former position as shown in Figure 1.
66 "
a
a
This process is repeated as every tile is pressed, the teeth for forming the
udercut being projected and withdrawn automatically by the usual working of
the press as the tiles are moulded and removed therefrom in the ordinary way.
Figure “3” is a plan of the lower die, a section of which is shewn in Figure 1.

page_text: In this drawing b b b b indicate the position of the undercuts which may be in
any position in the tile and of any suitable length.
In addition to greatly simplifying the apparatus hitherto used for producing
undercut recesses in tiles our invention is worked automatically by the ordinary
use of the press and as the teeth forming the undercut are withdrawn whilst the
Tile itself and the die on which it rests are stationary, such undercut is clearer,
and the tendency to injure the same is very much lessened or altogether obviated.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:
1. In apparatus or mechanical arrangements for the manufacture of tiles having
undercut recesses, the combination with the lower die or bottom plate of a Potters
Tile Press of movable teeth which are automatically withdrawn by the ordinary
working of the press whilst such lower die and tile are stationary substantially as
before described.
2. In apparatus or mechanical arrangements for the manufacture of tiles
having undercut recesses the means of automatically working teeth for the produc-
tion of such undercuts by arranging suitable cranks levers or other mechanical
means so as to be actuated either by the top of the spindle which is screwed into
the lower die or bottom plate of a Potters Tile Press or by an adjustable piece
attached to the top of the spindle such adiustable piece being futed into the lower
die in such a way as to be slightly movable by the spindle before engaging with
and moving the lower die substantially as before described.
3. The improved apparatus or mechanical arrangements for the production
of undercut recesses in Tiles during the pressing of the same substantially as
herein before described.
Dated this Twelfth day of August 1897.
WILLIAM BURTON.
JOSEPH BURTON.