Improvements in Forming Underout Surfaces in Tiles and other Ceramic Products for the Secure Fixing of the same to Floors, Walls, Ceilings, and the like, and in Apparatus therefor.
Year: 1894

page_text: Date of Application, 2nd Nov., 1894
Complete Specification Left, 15th Jan., 1895-Accepted, 2nd Mar.,
1895
PROVISIONAL SPECIFICATION.
Improvements in Forming Underout Surfaces in Tiles and other
Ceramic Products for the Secure Fixing of the same to Floors,
Walls, Ceilings, and the like, and in Apparatus therefor.
I, THOMAS WILLIAM JARRETT, Ceramic Fixer of 37, Bedford Row London
in the County of Middlesex do hereby declare the nature of this invention to be as
follows:-
-
This invention relates to the forming of undercut surfaces in tiles and other
ceramic products that are required to be securely fixed to floors, walls and ceilings,
and to the necessary apparatus therefor.
I form undercut surfaces in tiles and other ceramic products in the course of the
manufacture thereof and by the following method :—
place clay in the usual manner in the moulds commonly used and fix in position
a flexible air-containing apparatus, which in the operation known as pressing is
brought against the clay and is so changed in form by the pressure used as to
produce the undercut surfaces required.
When the pressing is completed, and the pressure removed the apparatus
immediately regains its original shape and frees itself from the clay.
Dated this First day of November 1894.
THOMAS WILLIAM JARRETT.
COMPLETE SPECIFICATION.
Improvements in Forming Underout Surfaces in Tiles and other
Ceramio Products for the Secure Fixing of the same to Floors,
Walls, Ceilings, and the like, and in Apparatus therefor,
I, THOMAS WILLIAM JARRETT, Ceramic Fixer, of 37, Bedford Row, London,
in the County of Middlesex 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 forming of underent surfaces in tiles and other
ceramic products that are required to be securely fixed to floors, walls, and ceilings,
and to the necessary apparatus therefor.
I form undercut surfaces in tiles and other ceramic products in the course of
the manufacture thereof and by the following method:- place clay in the
ordinary manner in the moulds commonly used and fix in position a flexible air-
containing apparatus, which in the operation known as pressing is brought against
the clay and is so changed in form by the pressure applied as to produce the
undercut surfaces required. When the operation is completed, and the pressure
removed the apparatus immediately regains its original shape and frees itself from
the clay. By clay is to be understood the material in common use by clay-workers
whether it be in a pulverized or dust state, or in a plastic state.
I now proceed to describe the apparatus 1 employ to form the undercuts or
recesses and to give examples of its application. The apparatus may be made of

page_text: Figures 1 and 3 are single air-tight tubes.
Figures 1 and 3' are sections of the same.
Figures 2 and 4 show donble air-tight tubes.
Figures 2 and 4 being their sections.
Figure 5 is a hollow air-tight cylinder.
Figure 5' is a sectional view.
Figure 6 shows a single straight air-tight tube.
Figure 6' gives its section.
Figure 7 represents a double straight air-tight tube.
Figure 7 is a section of the same.
All these examples are inflated with air by the method generally employed.
I do not limit myself to the forms here given, but use any suitable shape.
Figures 8 and 8' show a tile made of clay in its pulverized or dust state, having
an undercut or recessed back. The making of this tile is as follows:-The mould
box is filled with clay and the air-tight tubes shown in Figure 2 are brought
against it, pressure to make the tile is then applied-this pressure operates upon
the tubes altering their shape, and thus producing the undercut recess required.
The tile having been made the weight is taken off and the Lubes return to their
original form and leave the tile.
Figures 9 and 9 show a brick of the ordinary size made of plastic clay, with an
undercut or recessed face and end, produced by single air-tight tubes similar to
that shown in Figure 3. The mode of forming the undercuts or recesses being
substantially the same as in the case of the tile just described.
These examples-one the application to clay in its pulverized or dust state, and
the other to clay in its plastic state-scem suflicient to explain the principle of the
invention. The apparatus may be placed against the clay in any convenient
manner; and can be used in connection with any of the presses and the moulds in
general use. It does not therefore appear to be necessary to give illustrations of
any of these presses and moulds.
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 method of forming undercut surfaces and recesses in tiles and other
ceramic productions in the course of their manufacture by means of a flexible air-
containing apparatus the form of which when brought against the clay and
subjected to pressure is so altered thereby as to produce the undercuts and recesses
required.
2. A flexible air-containing apparatus as described and used for the purpose of
making undercut surfaces and recesses in ceramic productions.
Dated this 14th day of January 1895.