AN IMPROVED DIE FOR MOULDING OR SHAPING CLAY OR OTHER PLASTIC MATERIAL
Year: 1876

page_text: LETTERS PATENT to Richard Cardwell Robinson, of Avenham Cottage, Preston,
in the County of Lancaster, Ironfounder, for the Invention of "AN IMPROVED
DIE FOR MOULDING OR SHAPING CLAY OR OTHER PLASTIC MATERIAL."
Sealed the 20th April 1877, and dated the 28th October 1876.
PROVISIONAL SPECIFICATION left by the said Richard Cardwell Robinson at
the Office of the Commissioners of Patents on the 28th October 1876.
RICHARD CARDWELL ROBINSON, of Avenham Cottage, Preston, in the County of
Lancaster, Ironfounder. "AN IMPROVED DIE FOR MOULDING OR SHAPING CLAY
OR OTHER PLASTIC MATERIAL,"
This Invention relates to a peculiar construction and arrangement of die or
moulding orifice in expressing machines for moulding or shaping clay or other
plastic material, whereby the passage of the exuding clay through the die is greatly
facilitated, the surfaces of the clay are rendered more sinooth, and a higher finish
is imparted to them than has hitherto been usual.
To attain these results I employ what may be termed a "compound die," the
lining of which, next the clay, is composed of alternate surfaces of cloth and of brass
(or other suitable metal), and I provide for the supply of a sufficient quantity of
water to the cloth for the purpose of thereby lubricating the whole of the surfaces
which form the lining of the die.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Richard Cardwell Robinson in the Great Seal Patent Office on
the 20th April 1877.
RICHARD CARDWELL ROBINSON, of Avenham Cottage, Preston, in the County of
Lancaster, Ironfounder. "AN IMPROVED DIE FOR MOULDING OR SHAPING CLAY
OR OTHER PLASTIC MATERIAL."
This Invention relates to a peculiar construction and arrangement of die or
moulding orifice in expressing machines for moulding or shaping clay or other

page_text: plastic material, whereby the passage of the exuding clay through the die is greatly
facilitated, the surfaces of the clay are rendered more smooth, and a higher finish
is imparted to them than has hitherto been usual.
To attain these results I employ what may be termed a "compound die," the
lining of which next the clay is composed of alternate surfaces of cloth and of brass
(or other suitable metal), and I provide for the supply of a sufficient quantity of
water to the cloth for the purpose of thereby lubricating the whole of the surfaces
which form the lining of the die.
Such being the nature of my Invention I now proceed to describe the manner of
carrying it into effect, as illustrated in the accompanying Drawing, which repre-
sents a longitudinal vertical section of the improved dic.
a is the outer casing of the die made of wood, b being the point at which the
clay enters the die from the machine, and c the exit for the finished stream of clay;
d, d¹, d², d³, are brass linings; e, e¹, e², e³, are cloth linings, the layers of cloth and
brass overlapping each other in the same way as the laths of a Venetian blind
when it is closed; ff, are apertures or passages in the outer casing of the die for
the supply of water to the cloth for lubricating the inner surface of the die. The
metal lining is fastened to the outer casing of the die with screws, and the cloth
with nails.
The dotted lines shew the positions of the apertures ƒ underneath the cloth and
metal linings.
Having described the nature of the said Invention, and explained the manner of
carrying the same into practical effect, I would have it understood that what I
consider to be novel and original, and therefore claim as the Invention secured to
me by the berein-before in part recited Letters Patent is, the lining of the die with
alternate surfaces of metal and cloth in the manner and for the purpose herein-above
described.
In witness whereof, I, the said Richard Cardwell Robinson, have hereunto
set my hand and seal, this Ninteenth day of April, in the year of our Lord
One thousand eight hundred and seventy-seven.
RICHARD CARDWELL ROBINSON. (L.S.)