Improvements in Means of Pressing or Moulding Sheet Metal, Paper, Cardboard, or such like Materials into Dies.
Year: 1889

page_text: Date of Application, 23rd May, 1889
Complete Specification Left, 22nd Feb., 1890-Accepted, 23rd May, 1890
PROVISIONAL SPECIFICATION.
Improvements in Means of Pressing or Moulding Sheet Metal, Paper,
Cardboard, or such like Materials into Dies.
I DAVID GILSON of No. 360 Kingsland Road London E. do hereby declare the
nature of this invention to be as follows:-
This invention relates to means of producing any required impression upon sheet
metal, paper, cardboard or such like materials by the employment of one die only
instead of the top and bottom die usually employed for this purpose.
According to my invention I form the matrix or die with a raised cylindrical wall
surrounding it within which the piece of material to be operated upon is placed and
over which a cover is clamped with an india rubber or asbestos washer intervening
between it and the piece of material to be operated upon.
In this manner a cavity is produced within the inould formed by the matrix or
die and its cover.
By means of a pipe communicating with the cavity referred to, hydraulic or pneu-
matic pressure may be applied to one side of the piece of material to be operated
upon and so press or mould it to the form of the matrix or die provided.
When the material to be operated upon consists of sheet metal, hydraulic pressure
may most conveniently be employed; but when the material consists of paper, card-
board or such like materials which would be damaged by contact with water I place
an air vessel between the matrix or die and the source of hydraulic pressure so
that the hydraulic pressure is employed to compress the air contained in the air
vessel and so apply pnematic pressure only to press or mould the material to the
form of the matrix or die provided.
Dated this 22nd day of Ma 1880
AYRTON & THOMAS,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Means of Pressing or Moulding Sheet Metal, Paper,
Cardboard, or such like Materials into Dies.
I DAVID GILSON of No. 360 Kingsland Road London, E. Engineer 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 means of producing any required impression upon sheet
metal, paper, cardboard or such like materials by the employment of one die only
instead of the top and botton die usually employed for this purpose.
In the accompanying drawings in both the Figures of which the same parts are
indicated by like reference letters. Figure 1 is a sectional elevation and Figure 2
is a plan of a die fitted with a cover through which hydraulic or pneumatic pressure
may be admitted to one side of the material which is to be pressed into the die.
According to my invention I form the matrix or die A with a raised cylindrical
wall B surrounding it within which the piece of material C to be operated upon is
placed and over which a cover D is clamped by means of the pivotted bolts and nuts G
with an india rubber or asbostos washer E intervening between it and the piece of
material to be operated upon.
In this manner a cavity is produced within the mould formed by the matrix or
die A and its cover D.
By means of a pipe F communicating with the cavity referred to, hydraulic or
[PC]

page_text: pneumatic pressure may be applied to one side of the piece of material to be
operated upon and so press or mould it to the form of the matrix or die provided.
When the material to be operated upon consists of sheet metal, hydraulic pressure
may most conveniently be employed; but when the material consists of paper card-
board or such like materials which would be damaged by contact with water I place
an air vessel between the matrix or die and the source of of hydraulic pressure so
that the hydraulic pressure is employed to compress the air contained in the air vessel
and so apply pneumatic pressure only to press or mould the material to the form of
the matrix or die provided.
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:
Pressing or moulding sheet metal paper, cardboard or such like materials into dies
by the application of hydraulic or pneumatic pressure upon one side of the material
to be pressed or moulded substantially as described.
Dated this way of February
AYRTON & THOMAS,
Agents for the Applicant.