Improvements in Casting Boxes for Producing Stereotype Plates for Rotary Printing Machines.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Casting Boxes for Producing Stereotype Plates for
Rotary Printing Machines.
I, ALBERT SAUVÉE, of 22 Parliament Street, Westminster, in the County of
Middlesex, Civil Engineer, do hereby declare the nature of this invention to be
as follows:-
This invention is applicable to that type of stereotype casting boxes which
consists essentially of an open shell and a centre core, both of segmental :
cylindrical form, which may be pivotted together on a horizontal axis if desired
if desired parallel to their own, and at a point beyond their circumference, the
relative diameters of the shell and core being such as to leave a space between.
them to receive the type metal when the casting box is closed.
In such casting boxes as hitherto constructed it has been the practice to employ
a gauge for closing the end of the space between the core and the shell opposite to
that at which the type metal is run in. In practice it is found that this arrange-
ment is open to the objection that in pouring in the type metal the air contained
in the enclosed space is sometimes unable to escape entirely, and may con-
sequently produce blemishes or faults in the printing surface of the stereotype
plate produced.
In order to overcome this difficulty I form the shell and core so that the end of
each extends beyond the point at which the end of the plate to be produced, which
is opposite to that where the metal is run in, terminates, and I leave both ends
of the space between the core and shell open. The extension of the end of the
core and shell opposite to that at which the metal is run in is preferably such as to
bring such end at approximately the same level as the end where the metal.
is run in.
When the metal is run into the space between the core and shell the air therein
is driven before the metal, and is free to escape from the further end of the
casting box, which as above stated is left open, so that no air will be confined
within the casting space, and blemishes or defects in the printing plates due to this
cause will consequently be avoided.
I may further arrange openings or outlets for air through the core of the casting
box at intermediate points between that where the metal is run in and the opposite
end thereof.
71
1 1
T
1005
ALLISON BROS.,
Agents for the Applicant.

page_text: Improvements in Casting Boxes for Producing Stereotype Plates for
Rotary Printing Machines.
I, ALBERT SAUVÉE, of 22 Parliament Street, Westminster, in the County of
Middlesex, Civil 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 is applicable to that type of stereotype casting boxes which
consists essentially of an open shell and a centre core both of segmental cylindrical
form, which may be pivotted together on a horizontal axis if desired parallel or
perpendicular to their own, and at a point beyond their circumference, the relative
diameters of the shell and core being such as to leave a space between them to
receive the type metal when the casting box is closed.
In such casting boxes as hitherto constructed it has been the practice to employ
a gauge for closing the end of the space between the shell and the core opposite to
that at which the type metal is run in. In practice it is found that this
arrangement is open to the objection that in pouring in the type metal the air
contained in the enclosed space is sometimes unable to escape entirely, and may
consequently produce blemishes or faults in the printing surface of the stereotype
plate produced.
In order to overcome this difficulty I form the shell and core so that the end of
each extends beyond the point at which the end of the plate to be produced, which
is opposite to that where the metal is run in, terminates, and I leave both ends of
the space between the core and the shell open.
When the metal is run into the space between the core and the shell the air
therein is driven before the metal, and is free to escape from the further end of the
casting box, which as above stated is left open.
On the sides guages are provided to hold the matrix (or an electrotype to be
backed) and prevent the metal from escaping.
The result of this arrangement is that no air will be confined within the casting
space and blemishes or defects in the printing plates due to this cause will
consequently be avoided.
In order to enable my invention to be fully understood I will now proceed to
describe same by the aid of the accompanying drawings, which show in end and
side elevation respectively the essential parts of a casting box constructed according
to such invention.
A is the shell of the casting box, and B the core or cover of same, a space a, b,
being left between the two to receive the type metal to form the plate to be
produced, and in which space the matrix is arranged on the upper surface of the
shell A or an electro to be backed may take the place of such matrix.
A guage is placed at each end of the shell and holds the matrix or the electro.
The core B may be pivotted to shell A at the point D, upon which it can be
turned when requisite to remove the core from the shell: or such core may be
removed by a vertical movement by means of a screw working through a nut, or
by any other suitable means.
It will be seen that the space a, b, between the core B and shell A is open at
both ends, and that the end 6 of such core and shell extends beyond the end of
the matrix or electro, so that when the metal is run into the space a, b, at point a,
the air contained in such space will be driven in front of such metal, and escape at b,
so that the chance of any of the air becoming imprisoned in the metal, and so
producing blemishes or faults in the plate, is avoided.
The lever or handle E serves to open the casting box by causing the core B to

page_text: turn on its pivot D when it is desired: F is a clamping device serving to hold the
core and the shell firmly together when the casting box is closed.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
In a casting box for producing printing plates for rotary printing machines,
extending the core and shell of such box at that end which is opposite the end
where the metal to produce the plate is poured in, beyond the point at which the
plate terminates, and leaving this end of the space between the core and shell open,
so as to allow air to escape freely from such open end, substantially as and for the
purpose specified.
Dated this 7th day of October 1805
ALLISON BROS.,
Agents for the Applicant.