A New or Improved Method of Manufacturing Sheet Metal Casks or Barrels.
Year: 1896

page_text: Date of Application, 20th Feb., 1896
Complete Specification Left, 21st Dec., 1896-Accepted, 23rd Jan., 1897
PROVISIONAL SPECIFICATION.
A New or Improved Method of Manufacturing Sheet Metal Casks
or Barrels.
I, EDWARD REDMAN, of 40 New Park Street, Leeds, in the County of York,
Engineer, do hereby declare the nature of this invention to be as follows:-
In order to manufacture a barrel or cask of sheet metal by my new or improved
method I proceed as follows. I take a rectangular sheet of any suitable metal,
such for example as steel, and this I corrugate by any suitable means as for
example by passing it through corrugating rolls. I then take the sheet so
corrugated and place it between curved dies the said dies being curved according
to one type of my invention in a single direction the said direction being at right
angles to the direction of travel of the sheet upon which they operate. The curve
of the said dies are of different radius so that they are not quite parallel but are
such that the curves of the meeting surfaces approach more nearly at the centre
than they do at the sides. The corrugated sheet is fed between the dies in a
direction at right angles to the run of each corrugation. The feeding of the
corrugated sheet between the dies takes place by a step by step motion tbe dies
approaching and receding from one another with each step. In other words the
sheet is fed forward through one step when the dies approach and press it into shape.
Then the dies separate and the sheet is fed through another step and so on until
the whole sheet has been passed between the dies. The effect is that the sheet is
now curved from side to side, that is to say in the direction of the run of each
corrugation, and the corrugations are each shallower at the centre than they are at
the edges, this being due to the fact that the dies nip the plate more closely at
the centre than towards the sides. If the dies have been brought sufficiently
close together the corrugations will have been completely flattened out at the
centre.
The corrugated plate bent as aforesaid has now the bilge curve upon it, and at
the same time it will have been bent in a direction at right angles to the said
bilge curve. If the ends of the sheet be now brought together and fastened one
to the other by any of the usual means, a barrel body is formed and the heads
or ends can be adapted thereto and the barrel completed in any convenient
known way.
Instead of employing dies shaped as hereinbefore described I may employ dies
curved not only in the direction herein before mentioned but also in a direction at
right angles to the same: or one of the dies may be curved in one direction only and
the other in both directions.
I have hereinbefore spoken of the dies approaching to and receding from one
another. It will be obvious to persons skilled in the art that both dies may move
or that one may be fixed and the other movable.
I have herein before spoken of the sheet as being fed between the dies. It is.
obvious however that instead of the sheet travelling between the dies, the dies
might travel over the sheet.
In an alternative construction the sheet might be laid on a curved bed
constituting one of the dies and a shorter die of the necessary width might
travel over this so as to flatten out the corrugations in the desired manner.
la

page_text: such a case the short die, would travel step by step being first brought up to the
edge of the sheet lying. in position, moving a step, approaching the sheet so as
to compress it at the centre, receding from the sheet, advancing another step
and so on.
I desire it to be understood that I do not limit myself to the details specified as
the essence of my invention consists in first obtaining a corrugated sheet and then
submitting the same to the action of dies moving towards and from one another so
as to flatten the corrugations at such parts and in such manner as to give the sheet
the necessary forin to constitute a barrel body when its ends are brought together
and secured in-position..
Dated this L
A New or Improved Method of Manufacturing Sheet Metal Casks
or Barrels.
I, EDWARD REDMAN, of 40 New Park Street, Leeds in the County of York,
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:-
In order to manufacture a barrel or cask of sheet metal by my new or improved
method I proceed as follows. I take a rectangular sheet of any suitable metal,
such for example as steel; and this I corrugate by any suitable means as for
example by passing it through corrugating rolls. I then take the sheet so
corrugated and feed it between curved dies as shown in longitudinal section in
Figure and in cross section in Figure 2. Of these dies 1 is the upper and 2 the
lower. These dies are curved in a direction at. right angles to the direction of
feed, or in other words of travel of the sheet operated upon, that is to say they are
curved from the ends 3 to-the ends 4 of the dies: It will be seen that the curves
of the said dies are of different radius so that they are not quite parallel but are
such that the curves of the meeting surfaces approach more nearly at the centre 5
than they do at the ends 3, 4. The corrugated sheet is fed between the dies in a
direction at right angles to the run of the corrugations of the sheets as shown at
Figure 3. The feeding of the corrugated sheet between the dies takes place by a
step by step motion the dies approaching and receding from one another with each
step. In other words the sheet is fed forward through one step when the dies
approach and press it into shape. Then the dies separate and the sheet is fed
through another step and so on until the whole sheet has been passed between the
dies. The effect' is that the sheet is now curved from side to side as shown in
Figure 4, that is to say in the direction of the run of each corrugation; and the
corrugations are each shallower at the centre than they are at the edges, this
being due to the fact that the dies uip the plate more closely at the centre than
towards the sides. If the dies have been brought sufficiently close together the
corrugations will have been completely flattened out at the centre.
The corrugated sheet bent as aforesaid has now the bilge curve upon it as is
shown in Figure 4. But at the same time it will have been bent in a direction at
right angles to the said bilge curve as is shown in dotted lines at 6 in Figure 3.
If the ends of the sheet 7, 8 be now brought together and fastened one to the other

page_text: by any of the usual means a barrel body is now formed, the annular ends of the
barrel body being what were the sides of the corrugated sheet so that the
corrugations now run from end to end of the barrel body. The greater flattening
of the corrugations towards the centre than towards the sides of the sheet will
make the sheet longer (in a plane) towards the centre than towards the sides, so as
to give the greater circumference of the barrel body at the middle than towards
its ends. The heads of the barrel can now be fitted to the ends of the barrel body
in any of the well known ways.
The dies may be attached or secured in the press in any of the well known ways
suited to the particular press employed.
Instead of employing dies shaped as herein before described I may employ dies
curved not only in the direction hereinbefore mentioned but also in a direction at
right angles to the same: or one of the dies may be curved in one direction only
and the other in both directions.
I have hereinbefore spoken of the dies approaching to and receding from one
another. It will be obvious that both dies may move or that one may be fixed and
the other movable. I have also spoken of the sheet as being fed between the dies.
It is obvious however that instead of the sheet travelling between the dies, the dies
might travel over the sheet.
In an alternative construction the sheet might be laid on a curved bed con-
stituting one of the dies and a shorter die of the necessary width might travel
over this so as to flatten out the corrugations in the desired manner. In such a
case the short die would travel step by step being first brought up to the edge of
the sheet lying in position, moving a step, approaching the sheet so as to compress
it at the centre, receding from the sheet, advancing another step, and so on.
The method of carrying my present invention into effect which I have described
with reference to the accompanying figures is one which I have found to give good
results in practice. The dimensions of the sheet employed to make the barrel
body will depend upon the capacity of the barrel to be made and the use to which
it is to be put.
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 :-
The method of manufacturing sheet metal casks or barrels which consists in
first obtaining a rectangular corrugated sheet of metal and then submitting the
same to the action of dies so as to flatten the corrugations at such parts and in
such manner as to give the sheet the necessary form to constitute a barrel body
when the ends are brought together and secured in position, and then fastening the
heads thereto, all substantially as set forth.
Doted this 21st day of December 1896.