Improvements in Apparatus for Cutting and Stamping Metal Plates.
Year: 1889

page_text: Date of Application, 13th Aug., 1889
Complete Specification Left, 12th May, 1890-Accepted, 28th June, 1890
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Cutting and Stamping
Metal Plates.
I, DANIEL EDWARDS, of the Dyffryn Iron and Tinplate Works, Morriston, in the
County of Glamorgan, Tinplate Manufacturer, do hereby declare the nature of this
invention to be as follows:-
The primary object of my invention is to cut two opposite sides of metal plates
simultaneously in such a way as to ensure that the two cuts are exactly parallel to
each other, a matter often of importance in tin terne and other plates.
The machine is provided with two standards, one or both of which are movable in
guides in the bed plate. Each standard carries a fixed shear blade and has pivotted
to it an arm which carries a second shear blade. Motion is given to the pivotted
arms by a common shaft on which they move to and fro when the standards are
shifted. The standards are connected to each other by four or other number of tie-
bars whose ends are provided with screws and nuts so that the distance apart and
parallelism of the cutting blades can be accurately adjusted. A gauge (commonly
called a square) is provided on each of the standards against which is set one of the
sides of the plate which is not to be cut, and one of the blades, preferably a fixed
blade, carries an adjustable gange to regulate the amount of metal to be cut off one of
the sides.
t
The machine may also be adapted to stamp the plates at the same time as they are
being cut one of the dies of the stamping apparatus being fixed to one of the
standards, and the other die being carried or actuated by one of the pivotted arms.
1
C
1000
DANL. EDWARDS.
Improvements in Apparatus for Cutting and Stamping
Metal Plates.
I, DANIEL EDWARDS of the Dyffryn Iron and Tinplate Works, Morriston, in
the County of Glamorgan, Tinplate Manufacturer 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 :-
It is of great importance that tin plates and other like plates should have their
opposite sides truly parallel and their angles right angles.
To ensure this I employ cutting apparatus to trim the black plate before it is
submitted to the tinning or coating operation. I also when necessary simultaneously
impress a trade mark upon the plate.
The apparatus which I employ consists of two standards on each of which a knife
or cutting blade is fixed. The standards are mounted upon a bed along which one
or both of them can be moved. Adjustable tie bars are also provided for connecting
the standards so that they may be securely fixed at any required distance apart and
with the cutting blades truly parallel the one to the other.
Each standard has a lever jointed to it and an arm upon this lever is coupled by
means of a connecting rod with an eccentric upon a driven shaft or by other means a
vibrating movement is imparted to the lever.
The lever also carries a knife or cutting blade which operates with the blade on the
standard to shear the metal plates placed between the blade. The blades are longer
than the plates they are intended to trim and the edges are trimmed from end to
end at one stroke. Stops or gauges are provided to facilitate the placing of the

page_text: plates between the blades so that two opposite sides of the plate may be simultaneously
cut or trimmed parallel to a third side. When a trade mark is to be produced upon
the plate I mount a stamp upon the lever and a corresponding bed or die upon the
standard.
In order that my said Invention may be fully understood and readily carried into 5
effect I will proceed to describe the drawings hereunto annexed.
GOOIS.
Figures 4, 5 and 6 are also portions of side views. Figures 4 and 5 show ways of
providing gauges or stops and Figure 6 shows an alternative way of employing
marking tools.
a a is the bed, bb are the standards, are the cutting blades upon the standards,
cc are the adjustable tie bars which connect the standards, d d are the levers pivoted
to the standards. The pivots or joints are at dd' and the cutting blades which the
levers carry are marked 2. Each lever has a tail piece d³ and a connecting rod
couples this with an eccentric upon a shaft which slowly rotates. e e are supports for
the plate which is to be trimmed, they are fixed to the standards 6 on a level with the
edges of the blades . ff are adjustable stops on the standards against which the
end or side of the plate is brought.
.
In Figures 1 and 2 g is a stop carried by one of the levers d, it is set a short
distance off from the blade which this standard carries. The parts are so adjusted
that a plate inserted between the blades with its end or side resting on the stops ffis,
when the cutting blades come together, clipped all along the two sides or ends so as
to make these sides truly straight and parallel and square with the end in contact
with the stops f
In Figure 3. is a stamp carried by the lever d and i is a bed die carried by the
standard. The stem of the stamp passes through a socket in which it is able to slide
and there is a strong spring in the socket which is compressed when the stamp comes
down upon the plate.
In Figure 4 the stop in Figures 1 and 2 is replaced by a spring stop g' upon the
standard 6, this stop can be set close up to the blade as it will yield to the lever and
blade dd when these come in contact with it.
In Figure 5 the spring stop gl is replaced by a stop g² which can slide in a guide
on the standard band is supported by a weighted lever.
In Figure 6 the stem of the stamp slides through a guide on the lever d; it is
jointed at its upper end to a pivoted rod which at its further extremity is coupled
by right and left hand screws with a nose d✰ on the lever d. In this case the spring
in connection with the stamp is not required.
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. Cutting apparatus substantially as described and having standards and levers
armed with cutting blades; such standards together with the levers being adjustable
and provided with gauges or stops; and the whole so arranged that at one operation
two sides or ends of a plate may be trimmed or shorn truly parallel and square with
a third side as herein set forth.
2. Cutting and stamping apparatus substantially as described and illustrated by
the annexed drawings.
J
1000
DANL. EDWARDS.