An improved mould for Casting Curved Stereotype riates.
Year: 1884

page_text: An improved mould for Casting Curved Stereotype riates.
I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of the said Invention for AN IMPROVED
MOULD FOR CASTING CURVED STEREOTYPE PLATES a communication to me from
abroad by Auguste Hippolyte Marinoni and Jules Michaud, both of 96 Rue
d'Assas, Paris, France, Machine Builders to be as follows:-
This Invention relates to an improved mould for making curved stereotype
plates for cylinder printing machines, whereby their manufacture is improved and
they are produced at a much quicker rate than by the methods actually in use.
The improvements consist, first, in a particular construction of cylindrical mould
in which the metal is run in at one side, thus permitting of the jet being readily
broken off without injury either to the stereotype or mould, whatever may be the
length of such stereotype.
2nd In the employment of a metal guard as a substitute for the paper guard
usually attached to one edge of the matrix.
3rd In an arrangement of slotted hinge for the guard so as to have it always in
position for being applied on the matrix and prevent it from falling after each
casting, thus avoiding damage thereto.
In curved stereotype moulds in which the metal is run in at one side the jet is
cut off either upon the cover itself of the mould by means of a saw or plane, or
upon a tool independent of the mould as described in a former patent. Attempts
have also been made to break off the jet with a view to save the labor of sawing or
planing, but the means hitherto employed with this object have always had the
great objection of damaging the stereotypes and destroying the matrix. The above
objections are entirely obviated by the very simple arrangement of this Invention
represented, by way of example, in figure 1 of the accompanying drawings, which
shows a section of a mould wherein the metal is run in at one side, the several
parts of the mould being as follows. A is the bottom and B the cover of the
mould. C are rings closing the curved ends of the mould. D bar for closing the
Din 21

page_text: .
opposite side of the mould to that at which the metal is poured in. E is a
F, F are the end plates
removable plate forming one side of the pouring hopper.
of said hopper. G is a guard plate, I are hooks for holding plates E, F in position.
J a bar or lever and K the inner side of the hopper.
To use the mould, the cover B is turned back to the position indicated in dot and
dash lines at B¹ the matrix is placed upon the bottom A of the mould and clamped
firmly thereon by applying the bands Ċ which close the curved ends of the mould
upon the two edges of said matrix, while the rule D is placed along its lower edge.
If a paper guard has been applied upon its upper edge as in ordinary, the guard is
turned down upon the plate K, so as to prevent the metal poured in passing behind
the matrix. The guard G shown is supposed to be made of paper pasted on the
edge of the mould and I will now describe how this guard may be dispensed with.
The matrix being placed in position the cover B is shut down upon the bottom
of the mould and secured in the ordinary manner. The plate E is then brought
to the position shown in full lines by rocking it on its pivot O and secured in such
position by the hooks I, after which the mould is ready to receive the metal. On
the metal being poured in and before the jet cools a bar J is plunged therein which
serves as a lever to facilitate breaking off the jet. When the jet is cooled, the
side and end plates EF are brought to the position shown by the dotted lines E" F"
when the jet being freed on the one side can be readily broken off by means of the
lever J or it may be seized and broken off with the hand simply.
To facilitate breaking off the jet the angle formed by the bottom end of the side
plate E is made to project into the space between the bottom and cover of the
mould so as to reduce the thickness of the metal at that point and thus facilitate
the fracture of the jet.
In order to still further facilitate this operation and prevent the possibility of
the letters near the edge of the stereotype plate being broken off with the jet the
matrix is moulded with a bead or rin M along its edge at this point as clearly
shown in figure 2, which is a full size section of the parts. In this figure is also
shown a metal guard plate G to be used instead of the paper guard as in figure 1.
The same letters of reference indicate the same parts as in Figure 1.
It will be seen from the foregoing that the jet can be very readily broken off
while the stereotype plate still remains enclosed in the mould during the operation
of breaking off the jet and there is therefore no risk of damaging the stereotype or
of injuring the matrix which it is highly important to avoid. The matrix can
therefore be used over again as in those moulds in which the jet is not broken off.
Moreover the fracture is effected at such a distance from the text as to absolutely
prevent any injury to the same.
In cases where either owing to the thickness or the great length of the stereotype,
the breaking off of the jet would be a matter of difficulty, the jet may be divided
into two or more parts if necessary, by the employment of one or more partitions F¹
placed parallel to the ends F as shown in plan at figure 3 and either fixed to the
moveable side E or introduced in the mouth of the mould at the time of casting.
A lever J would in this case be inserted in each part of the jet divided by the
separators F and each portion be broken off separately thus avoiding all difficulty
in the case of very long stereotype plates.
Although the movable side E of the mouth of the mould has been described as
being mounted to rock on the mould cover it will be understood that it may be
otherwise arranged to move independently of said cover and the side K of the
In this
mouth of the mould may be made movable instead of side E if desired.
case a metal guard G is used of the form shown in figure 4 in which E F are the
fixed sides of the hopper and K the movable side. The lower edge of the metal
guard G is made of the form shown at G¹ whereby to reduce the thickness of metal
of the stereotype plate at a suitable distance from the text, and matrix, in order to
avoid breaking off the letters or damaging the matrix. The same results are
obtainable with this as in the other arrangement, the jet being however broken

page_text: against the opposite edge of the mould. Both sides K and E may also be rendered
movable.
The metallic guard shown in figures 2 and 4 is connected to the mould by means
of slot hinges H which enables it to be readily handled even when hot, and also
ensure its being always available when needed whereas when used separately and
thrown upon the ground after each casting operation it is liable to be put out of
shape; moreover when thus fitted to the mould it is always applied in the proper
position upon the matrix. This improved guard with slot hinges as described may
also be applied to moulds in which the jet is cut off instead of being broken off as
before described the slotted hinge allowing in this case of the guard being raised in
order to open the mould.

page_text: An Improved Mould for Casting Curved Stereotype Plates.
I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of the said Invention for "AN IMPROVED
MOULD FOR CASTING CURVED STEREOTYPE PLATES" (a communication to me from
abroad by Auguste Hippolyte Marinoni and Jules Michaud, both of 96 Rue
d'Assas, Paris, France, Machine Builders) 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 an improved mould for making curved stereotype plates
for cylinder printing machines, whereby their manufacture is improved and they
are produced at a much quicker rate than by the methods actually in use.
The improvements, consist, first, in a particular construction of cylindrical mould
in which the metal is run in at one side, thus permitting of the jet being readily
broken off without injury either to the stereotype or matrix, whatever may be the
length of such stereotype.
2ndly In the employment of a metal guard as a substitute for the paper guard
usually pasted to one edge of the matrix.
3rd In an arrangement of slotted hinge for the guard so as to have it always in
position for being applied on the matrix and prevent it from falling after each
casting, thus avoiding damage thereto.
In curved stereotype moulds in which the metal is run in at one side, the jet is
cut off either upon the cover itself of the mould by means of a saw or plane, or
upon a tool independent of the mould as described in a former patent. Attempts
have also been made to break off the jet with a view to save the labour of sawing
or planing, but the means hitherto employed with this object have always bad
the great objection of damaging the stereotype and destroying the matrix.
The above objections are entirely obviated by the very simple arrangement of
this invention represented, by way of example, in figure 1 of the accompanying
drawings, which shows a section of a mould wherein the metal is run in at one
side, the several parts of the mould being as follows. A is the bottom and B the
cover of the mould. C are rings closing the curved ends of the mould. D is a bar
for closing the opposite side of the mould to that at which the metal is poured in.
E is a removable plate forming one side of the pouring hopper. F F are the end
plates of said hopper. G is a guard plate, I are hooks for holding plates E, F in,
position. J is a bar or lever and K the inner side of the hopper.
To use the mould, the cover B is turned back to the position indicated in dot
and dash lines at B₁, the matrix is placed upon the bottom A of the mould and
clamped firmly thereon by applying the bands C which close the curved ends of
the mould upon the two edges of said matrix, while the rule D is placed along its
lower edge.
If a paper guard has been pasted upon its upper edge as in ordinary,
the guard is turned down upon the plate K, so as to prevent the metal poured in
from passing behind the matrix. The guard G shown, is supposed to be made of
paper pasted on the edge of the matrix, and I will now describe how this guard
may be dispensed with.

page_text: The matrix being placed in position, the cover B is shut down upon the bottom
of the mould and secured in the ordinary manner. The plate E is then brought
to the position shown in full lines by rocking it on its pivot O and secured in such
position by the hooks I, after which the mould is ready to receive the metal.. On
the metal being poured in and before the jet cools, a bar J is plunged therein which
serves as a lever to facilitate breaking off the jet. When the jet is cooled, the side
and end plates E F are brought to the position shown by the dotted lines E" F¹1,
when the jet being freed on the one side can be readily broken off by means of
the lever J, or it may be seized and broken off with the hand simply.
To facilitate breaking off the jet, the angle formed by the bottom end of the
side plate E, is made to project into the space between the bottom and cover of the
mould, so as to reduce the thickness of the metal at that point, and thus facilitate
the fracture of the jet.
In order to still further facilitate this operation and prevent the possibility of
the letters near the edge of the stereotype plate being broken off with the jet, the
matrix is moulded with a bead or rim M along its edge at this point, as clearly
shown in figure 2, which is a full size section of the parts. In this figure, is alsò
shown a metal guard plate G, to be used instead of the paper guard as in figure 1.
The same letters of reference indicate the same parts as in Figure 1.
It will be seen from the foregoing that the jet can be very readily broken off
while the stereotype plate still remains enclosed in the mould during the operation
of breaking off the jet and there is therefore no risk of damaging the stereotype or
of injuring the matrix, which it is highly important to avoid. The matrix can
therefore be used over again as in those moulds in which the jet is not broken off.
Moreover the fracture is effected at such a distance from the text as to absolutely
prevent any injury to the same.
In cases where either owing to the thickness or the great length of the stereotype,
the breaking off of the jet would be a matter of difficulty, the jet may be divided
into two or more parts if necessary, by the employment of one or more partitions F¹
placed parallel to the ends F as shown in plan at figure 3, and either fixed to the
movable side E or introduced in the mouth of the mould at the time of casting.
A lever J would in this case, be inserted in each part of the jet divided by the
separators F, and each portion be broken off separately, thus avoiding all difficulty
in the case of very long stereotype plates.
Although the movable side E of the mouth of the mould, has been described as
being mounted to rock on the mould cover, it will be understood that it may be
otherwise arranged to move independently of said cover and the side K of the
mouth of the mould may be made movable instead of side E if desired. In this
case a metal guard G is used of the form shown in figure 4, in which E F are the
fixed sides of the hopper and K the movable side. The lower edge of the metal
guard G is made of the form shown at G', whereby to reduce the thickness of metal
of the stereotype plate at a suitable distance from the text, and matrix, in order to
avoid breaking off the letters or damaging the matrix. The same results are
obtainable with this as in the other arrangement, the jet being however broken
against the opposite edge of the mould. Both sides K and E may also be rendered
movable if desired.
The metallic guard shown in figures 2 and 4 is connected to the mould by means
of slot hinges H which enable it to be readily handled even when hot, and also
ensure its being always available when needed, whereas when used separately and
thrown upon the ground after each casting operation it is liable to be put out of
shape; moreover when thus fitted to the mould, it is always applied in the proper
position upon the matrix. This improved guard with slot hinges as described, may
also be applied to moulds in which the jet is cut off instead of being broken off as
before described, the slotted hinge allowing in this case of the guard being raised
by the stereotype in opening the mould. It would be impossible without the
slot H to attach the guard to the mould as it would prevent the opening of the
mould.

page_text: It will be understood that the several improvements of this invention may be
applied either in combination or separately.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
1st The application to moulds for casting curved stereotype plates, in which the
metal is run in at one side, of one or more movable hopper plates so disposed as to
reduce the thickness of the metal at the point where the jet is to be broken off;
the said hopper plates being capable of independent movement for the purpose of
exposing the jet at one or both sides after casting, and thus enabling it to be easily
broken off without damaging the stereotype or matrix, all substantially as
herein before described.
2nd The employment of partitions for dividing the jet into two or more parts to
facilitate its fracture as described.
3rd The employment of a metal guard, as a substitute for the ordinary paper
guard pasted along the edge of the matrix, as described.
4th The employment of a guard having a bottom edge of the form shown, for
reducing the thickness of the stereotype plate at the point where the jet is formed
and thus enable it to be readily broken off, as described.
5th The slot hinged guard, permanently attached to the mould as described, for
.the purpose specified.